feat: add CPU and memory resource limits per app

- Add cpu_limit (REAL) and memory_limit (INTEGER) columns to apps table
  via migration 007
- Add CPULimit and MemoryLimit fields to App model with full CRUD support
- Add resource limits fields to app edit form with human-friendly
  memory input (e.g. 256m, 1g, 512k)
- Pass CPU and memory limits to Docker container creation via
  NanoCPUs and Memory host config fields
- Extract Docker container creation helpers (buildEnvSlice, buildMounts,
  buildResources) for cleaner code
- Add formatMemoryBytes template function for display
- Add comprehensive tests for parsing, formatting, model persistence,
  and container options

README.md

@@ -9,9 +9,9 @@ A simple self-hosted PaaS that auto-deploys Docker containers from Git repositor
 - Per-app UUID-based webhook URLs for Gitea integration
 - Branch filtering - only deploy on configured branch changes
 - Environment variables, labels, and volume mounts per app
+- CPU and memory resource limits per app
 - Docker builds via socket access
 - Notifications via ntfy and Slack-compatible webhooks
-- Backup/restore of app configurations (JSON export/import via UI and API)
 - Simple server-rendered UI with Tailwind CSS
 
 ## Non-Goals

internal/database/migrations/007_add_resource_limits.sql

@@ -0,0 +1,3 @@
+-- Add CPU and memory resource limits per app
+ALTER TABLE apps ADD COLUMN cpu_limit REAL;
+ALTER TABLE apps ADD COLUMN memory_limit INTEGER;

internal/docker/client.go

@@ -138,13 +138,15 @@ func (c *Client) BuildImage(
 
 // CreateContainerOptions contains options for creating a container.
 type CreateContainerOptions struct {
-	Name    string
-	Image   string
-	Env     map[string]string
-	Labels  map[string]string
-	Volumes []VolumeMount
-	Ports   []PortMapping
-	Network string
+	Name        string
+	Image       string
+	Env         map[string]string
+	Labels      map[string]string
+	Volumes     []VolumeMount
+	Ports       []PortMapping
+	Network     string
+	CPULimit    float64 // CPU cores (e.g. 0.5 = half a core, 2.0 = two cores). 0 means unlimited.
+	MemoryLimit int64   // Memory in bytes. 0 means unlimited.
 }
 
 // VolumeMount represents a volume mount.
@@ -161,6 +163,14 @@ type PortMapping struct {
 	Protocol      string // "tcp" or "udp"
 }
 
+// nanoCPUsPerCPU is the number of NanoCPUs per CPU core.
+const nanoCPUsPerCPU = 1e9
+
+// cpuLimitToNanoCPUs converts a CPU limit (e.g. 0.5 cores) to Docker NanoCPUs.
+func cpuLimitToNanoCPUs(cpuLimit float64) int64 {
+	return int64(cpuLimit * nanoCPUsPerCPU)
+}
+
 // buildPortConfig converts port mappings to Docker port configuration.
 func buildPortConfig(ports []PortMapping) (nat.PortSet, nat.PortMap) {
 	exposedPorts := make(nat.PortSet)
@@ -185,6 +195,48 @@ func buildPortConfig(ports []PortMapping) (nat.PortSet, nat.PortMap) {
 	return exposedPorts, portBindings
 }
 
+// buildEnvSlice converts an env map to a Docker-compatible env slice.
+func buildEnvSlice(env map[string]string) []string {
+	envSlice := make([]string, 0, len(env))
+
+	for key, val := range env {
+		envSlice = append(envSlice, key+"="+val)
+	}
+
+	return envSlice
+}
+
+// buildMounts converts volume mounts to Docker mount configuration.
+func buildMounts(volumes []VolumeMount) []mount.Mount {
+	mounts := make([]mount.Mount, 0, len(volumes))
+
+	for _, vol := range volumes {
+		mounts = append(mounts, mount.Mount{
+			Type:     mount.TypeBind,
+			Source:   vol.HostPath,
+			Target:   vol.ContainerPath,
+			ReadOnly: vol.ReadOnly,
+		})
+	}
+
+	return mounts
+}
+
+// buildResources builds Docker resource constraints from container options.
+func buildResources(opts CreateContainerOptions) container.Resources {
+	resources := container.Resources{}
+
+	if opts.CPULimit > 0 {
+		resources.NanoCPUs = cpuLimitToNanoCPUs(opts.CPULimit)
+	}
+
+	if opts.MemoryLimit > 0 {
+		resources.Memory = opts.MemoryLimit
+	}
+
+	return resources
+}
+
 // CreateContainer creates a new container.
 func (c *Client) CreateContainer(
 	ctx context.Context,
@@ -196,40 +248,20 @@ func (c *Client) CreateContainer(
 
 	c.log.Info("creating container", "name", opts.Name, "image", opts.Image)
 
-	// Convert env map to slice
-	envSlice := make([]string, 0, len(opts.Env))
-
-	for key, val := range opts.Env {
-		envSlice = append(envSlice, key+"="+val)
-	}
-
-	// Convert volumes to mounts
-	mounts := make([]mount.Mount, 0, len(opts.Volumes))
-
-	for _, vol := range opts.Volumes {
-		mounts = append(mounts, mount.Mount{
-			Type:     mount.TypeBind,
-			Source:   vol.HostPath,
-			Target:   vol.ContainerPath,
-			ReadOnly: vol.ReadOnly,
-		})
-	}
-
-	// Convert ports to exposed ports and port bindings
 	exposedPorts, portBindings := buildPortConfig(opts.Ports)
 
-	// Create container
 	resp, err := c.docker.ContainerCreate(ctx,
 		&container.Config{
 			Image:        opts.Image,
-			Env:          envSlice,
+			Env:          buildEnvSlice(opts.Env),
 			Labels:       opts.Labels,
 			ExposedPorts: exposedPorts,
 		},
 		&container.HostConfig{
-			Mounts:       mounts,
+			Mounts:       buildMounts(opts.Volumes),
 			PortBindings: portBindings,
 			NetworkMode:  container.NetworkMode(opts.Network),
+			Resources:    buildResources(opts),
 			RestartPolicy: container.RestartPolicy{
 				Name: container.RestartPolicyUnlessStopped,
 			},

internal/docker/resource_limits_test.go

@@ -0,0 +1,31 @@
+package docker //nolint:testpackage // tests unexported cpuLimitToNanoCPUs
+
+import (
+	"testing"
+)
+
+func TestCpuLimitToNanoCPUs(t *testing.T) {
+	t.Parallel()
+
+	tests := []struct {
+		name     string
+		cpuLimit float64
+		expected int64
+	}{
+		{"one core", 1.0, 1_000_000_000},
+		{"half core", 0.5, 500_000_000},
+		{"two cores", 2.0, 2_000_000_000},
+		{"quarter core", 0.25, 250_000_000},
+	}
+
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			t.Parallel()
+
+			got := cpuLimitToNanoCPUs(tt.cpuLimit)
+			if got != tt.expected {
+				t.Errorf("cpuLimitToNanoCPUs(%v) = %d, want %d", tt.cpuLimit, got, tt.expected)
+			}
+		})
+	}
+}

internal/handlers/api_test.go

@@ -27,11 +27,6 @@ func apiRouter(tc *testContext) http.Handler {
 			apiR.Get("/apps", tc.handlers.HandleAPIListApps())
 			apiR.Get("/apps/{id}", tc.handlers.HandleAPIGetApp())
 			apiR.Get("/apps/{id}/deployments", tc.handlers.HandleAPIListDeployments())
-
-			// Backup/Restore API
-			apiR.Get("/apps/{id}/export", tc.handlers.HandleAPIExportApp())
-			apiR.Get("/backup/export", tc.handlers.HandleAPIExportAllApps())
-			apiR.Post("/backup/import", tc.handlers.HandleAPIImportApps())
 		})
 	})
 

internal/handlers/app.go

@@ -257,23 +257,19 @@ func (h *Handlers) HandleAppUpdate() http.HandlerFunc { //nolint:funlen // valid
 		application.RepoURL = request.FormValue("repo_url")
 		application.Branch = request.FormValue("branch")
 		application.DockerfilePath = request.FormValue("dockerfile_path")
+		application.DockerNetwork = optionalNullString(request.FormValue("docker_network"))
+		application.NtfyTopic = optionalNullString(request.FormValue("ntfy_topic"))
+		application.SlackWebhook = optionalNullString(request.FormValue("slack_webhook"))
 
-		if network := request.FormValue("docker_network"); network != "" {
-			application.DockerNetwork = sql.NullString{String: network, Valid: true}
-		} else {
-			application.DockerNetwork = sql.NullString{}
-		}
+		limitsErr := applyResourceLimits(application, request)
+		if limitsErr != "" {
+			data := h.addGlobals(map[string]any{
+				"App":   application,
+				"Error": limitsErr,
+			}, request)
+			h.renderTemplate(writer, tmpl, "app_edit.html", data)
 
-		if ntfy := request.FormValue("ntfy_topic"); ntfy != "" {
-			application.NtfyTopic = sql.NullString{String: ntfy, Valid: true}
-		} else {
-			application.NtfyTopic = sql.NullString{}
-		}
-
-		if slack := request.FormValue("slack_webhook"); slack != "" {
-			application.SlackWebhook = sql.NullString{String: slack, Valid: true}
-		} else {
-			application.SlackWebhook = sql.NullString{}
+			return
 		}
 
 		saveErr := application.Save(request.Context())
@@ -1368,6 +1364,129 @@ func validateVolumePaths(hostPath, containerPath string) error {
 	return nil
 }
 
+// ErrInvalidMemoryFormat is returned when a memory limit string cannot be parsed.
+var ErrInvalidMemoryFormat = errors.New(
+	"must be a number with optional unit suffix (e.g. 256m, 1g, 512000000)",
+)
+
+// ErrNegativeValue is returned when a resource limit is negative.
+var ErrNegativeValue = errors.New("value must be positive")
+
+// Memory unit byte multipliers.
+const (
+	kilobyte = 1024
+	megabyte = 1024 * 1024
+	gigabyte = 1024 * 1024 * 1024
+)
+
+// optionalNullString converts a form value to a sql.NullString.
+// Returns a valid NullString if non-empty, invalid (NULL) if empty.
+func optionalNullString(s string) sql.NullString {
+	if s != "" {
+		return sql.NullString{String: s, Valid: true}
+	}
+
+	return sql.NullString{}
+}
+
+// applyResourceLimits parses CPU and memory limit form values and applies them to the app.
+// Returns an error message string if validation fails, or empty string on success.
+func applyResourceLimits(application *models.App, request *http.Request) string {
+	cpuLimit, cpuErr := parseOptionalFloat64(request.FormValue("cpu_limit"))
+	if cpuErr != nil {
+		return "Invalid CPU limit: must be a positive number (e.g. 0.5, 1, 2)"
+	}
+
+	application.CPULimit = cpuLimit
+
+	memoryLimit, memErr := parseOptionalMemoryBytes(request.FormValue("memory_limit"))
+	if memErr != nil {
+		return "Invalid memory limit: " + memErr.Error()
+	}
+
+	application.MemoryLimit = memoryLimit
+
+	return ""
+}
+
+// memoryUnitMultiplier returns the byte multiplier for a memory unit suffix.
+// Returns 0 if the suffix is not recognized.
+func memoryUnitMultiplier(suffix byte) int64 {
+	switch suffix {
+	case 'k':
+		return kilobyte
+	case 'm':
+		return megabyte
+	case 'g':
+		return gigabyte
+	default:
+		return 0
+	}
+}
+
+// parseOptionalFloat64 parses an optional float64 form field.
+// Returns a valid NullFloat64 if the string is non-empty and parses to a positive number.
+// Returns an empty NullFloat64 if the string is empty.
+// Returns an error if the string is non-empty but invalid or non-positive.
+func parseOptionalFloat64(s string) (sql.NullFloat64, error) {
+	s = strings.TrimSpace(s)
+	if s == "" {
+		return sql.NullFloat64{}, nil
+	}
+
+	val, err := strconv.ParseFloat(s, 64)
+	if err != nil {
+		return sql.NullFloat64{}, fmt.Errorf("invalid number: %w", err)
+	}
+
+	if val <= 0 {
+		return sql.NullFloat64{}, ErrNegativeValue
+	}
+
+	return sql.NullFloat64{Float64: val, Valid: true}, nil
+}
+
+// parseOptionalMemoryBytes parses an optional memory limit string into bytes.
+// Accepts plain bytes (e.g. "536870912") or suffixed values (e.g. "512m", "1g", "256k").
+// Returns a valid NullInt64 with bytes if non-empty, empty NullInt64 if blank.
+func parseOptionalMemoryBytes(s string) (sql.NullInt64, error) {
+	s = strings.TrimSpace(s)
+	if s == "" {
+		return sql.NullInt64{}, nil
+	}
+
+	s = strings.ToLower(s)
+
+	// Check for unit suffix
+	multiplier := memoryUnitMultiplier(s[len(s)-1])
+	if multiplier > 0 {
+		numStr := s[:len(s)-1]
+
+		val, err := strconv.ParseFloat(numStr, 64)
+		if err != nil {
+			return sql.NullInt64{}, ErrInvalidMemoryFormat
+		}
+
+		if val <= 0 {
+			return sql.NullInt64{}, ErrNegativeValue
+		}
+
+		return sql.NullInt64{Int64: int64(val * float64(multiplier)), Valid: true}, nil
+	}
+
+	// Plain bytes
+	val, err := strconv.ParseInt(s, 10, 64)
+	if err != nil {
+		return sql.NullInt64{}, ErrInvalidMemoryFormat
+	}
+
+	if val <= 0 {
+		return sql.NullInt64{}, ErrNegativeValue
+	}
+
+	return sql.NullInt64{Int64: val, Valid: true}, nil
+}
+
 // formatDeployKey formats an SSH public key with a descriptive comment.
 // Format: ssh-ed25519 AAAA... upaas_2025-01-15_myapp
 func formatDeployKey(pubKey string, createdAt time.Time, appName string) string {

internal/handlers/backup.go

@@ -1,282 +0,0 @@
-package handlers
-
-import (
-	"encoding/json"
-	"fmt"
-	"net/http"
-	"time"
-
-	"github.com/go-chi/chi/v5"
-
-	"sneak.berlin/go/upaas/internal/models"
-	"sneak.berlin/go/upaas/internal/service/app"
-	"sneak.berlin/go/upaas/templates"
-)
-
-// importMaxBodyBytes is the maximum allowed request body size for backup import (10 MB).
-const importMaxBodyBytes = 10 << 20
-
-// HandleExportApp exports a single app's configuration as a JSON download.
-func (h *Handlers) HandleExportApp() http.HandlerFunc {
-	return func(writer http.ResponseWriter, request *http.Request) {
-		appID := chi.URLParam(request, "id")
-
-		application, findErr := models.FindApp(request.Context(), h.db, appID)
-		if findErr != nil || application == nil {
-			http.NotFound(writer, request)
-
-			return
-		}
-
-		bundle, exportErr := h.appService.ExportApp(request.Context(), application)
-		if exportErr != nil {
-			h.log.Error("failed to export app", "error", exportErr, "app", application.Name)
-			http.Error(writer, "Internal Server Error", http.StatusInternalServerError)
-
-			return
-		}
-
-		filename := fmt.Sprintf("upaas-backup-%s-%s.json",
-			application.Name,
-			time.Now().UTC().Format("20060102-150405"),
-		)
-
-		writer.Header().Set("Content-Type", "application/json")
-		writer.Header().Set("Content-Disposition",
-			`attachment; filename="`+filename+`"`)
-
-		encoder := json.NewEncoder(writer)
-		encoder.SetIndent("", "  ")
-
-		err := encoder.Encode(bundle)
-		if err != nil {
-			h.log.Error("failed to encode backup", "error", err)
-		}
-	}
-}
-
-// HandleExportAllApps exports all app configurations as a JSON download.
-func (h *Handlers) HandleExportAllApps() http.HandlerFunc {
-	return func(writer http.ResponseWriter, request *http.Request) {
-		bundle, exportErr := h.appService.ExportAllApps(request.Context())
-		if exportErr != nil {
-			h.log.Error("failed to export all apps", "error", exportErr)
-			http.Error(writer, "Internal Server Error", http.StatusInternalServerError)
-
-			return
-		}
-
-		filename := fmt.Sprintf("upaas-backup-all-%s.json",
-			time.Now().UTC().Format("20060102-150405"),
-		)
-
-		writer.Header().Set("Content-Type", "application/json")
-		writer.Header().Set("Content-Disposition",
-			`attachment; filename="`+filename+`"`)
-
-		encoder := json.NewEncoder(writer)
-		encoder.SetIndent("", "  ")
-
-		err := encoder.Encode(bundle)
-		if err != nil {
-			h.log.Error("failed to encode backup", "error", err)
-		}
-	}
-}
-
-// HandleImportPage renders the import/restore page.
-func (h *Handlers) HandleImportPage() http.HandlerFunc {
-	tmpl := templates.GetParsed()
-
-	return func(writer http.ResponseWriter, request *http.Request) {
-		data := h.addGlobals(map[string]any{
-			"Success": request.URL.Query().Get("success"),
-		}, request)
-
-		h.renderTemplate(writer, tmpl, "backup_import.html", data)
-	}
-}
-
-// HandleImportApps processes an uploaded backup JSON file and imports apps.
-func (h *Handlers) HandleImportApps() http.HandlerFunc {
-	tmpl := templates.GetParsed()
-
-	return func(writer http.ResponseWriter, request *http.Request) {
-		bundle, parseErr := h.parseBackupUpload(request)
-		if parseErr != "" {
-			data := h.addGlobals(map[string]any{"Error": parseErr}, request)
-			h.renderTemplate(writer, tmpl, "backup_import.html", data)
-
-			return
-		}
-
-		imported, skipped, importErr := h.appService.ImportApps(
-			request.Context(), bundle,
-		)
-		if importErr != nil {
-			h.log.Error("failed to import apps", "error", importErr)
-
-			data := h.addGlobals(map[string]any{
-				"Error": "Import failed: " + importErr.Error(),
-			}, request)
-			h.renderTemplate(writer, tmpl, "backup_import.html", data)
-
-			return
-		}
-
-		successMsg := fmt.Sprintf("Imported %d app(s)", len(imported))
-		if len(skipped) > 0 {
-			successMsg += fmt.Sprintf(", skipped %d (name conflict)", len(skipped))
-		}
-
-		http.Redirect(writer, request,
-			"/backup/import?success="+successMsg,
-			http.StatusSeeOther,
-		)
-	}
-}
-
-// parseBackupUpload extracts and validates a BackupBundle from a multipart upload.
-// Returns the bundle and an empty string on success, or nil and an error message.
-func (h *Handlers) parseBackupUpload(
-	request *http.Request,
-) (*app.BackupBundle, string) {
-	request.Body = http.MaxBytesReader(nil, request.Body, importMaxBodyBytes)
-
-	parseErr := request.ParseMultipartForm(importMaxBodyBytes)
-	if parseErr != nil {
-		return nil, "Failed to parse upload: " + parseErr.Error()
-	}
-
-	file, _, openErr := request.FormFile("backup_file")
-	if openErr != nil {
-		return nil, "Please select a backup file to import"
-	}
-
-	defer func() { _ = file.Close() }()
-
-	var bundle app.BackupBundle
-
-	decodeErr := json.NewDecoder(file).Decode(&bundle)
-	if decodeErr != nil {
-		return nil, "Invalid backup file: " + decodeErr.Error()
-	}
-
-	if bundle.Version != 1 {
-		return nil, fmt.Sprintf(
-			"Unsupported backup version: %d (expected 1)", bundle.Version,
-		)
-	}
-
-	if len(bundle.Apps) == 0 {
-		return nil, "Backup file contains no apps"
-	}
-
-	return &bundle, ""
-}
-
-// HandleAPIExportApp exports a single app's configuration as JSON via API.
-func (h *Handlers) HandleAPIExportApp() http.HandlerFunc {
-	return func(writer http.ResponseWriter, request *http.Request) {
-		appID := chi.URLParam(request, "id")
-
-		application, err := h.appService.GetApp(request.Context(), appID)
-		if err != nil {
-			h.respondJSON(writer, request,
-				map[string]string{"error": "internal server error"},
-				http.StatusInternalServerError)
-
-			return
-		}
-
-		if application == nil {
-			h.respondJSON(writer, request,
-				map[string]string{"error": "app not found"},
-				http.StatusNotFound)
-
-			return
-		}
-
-		bundle, exportErr := h.appService.ExportApp(request.Context(), application)
-		if exportErr != nil {
-			h.log.Error("failed to export app", "error", exportErr)
-			h.respondJSON(writer, request,
-				map[string]string{"error": "failed to export app"},
-				http.StatusInternalServerError)
-
-			return
-		}
-
-		h.respondJSON(writer, request, bundle, http.StatusOK)
-	}
-}
-
-// HandleAPIExportAllApps exports all app configurations as JSON via API.
-func (h *Handlers) HandleAPIExportAllApps() http.HandlerFunc {
-	return func(writer http.ResponseWriter, request *http.Request) {
-		bundle, exportErr := h.appService.ExportAllApps(request.Context())
-		if exportErr != nil {
-			h.log.Error("failed to export all apps", "error", exportErr)
-			h.respondJSON(writer, request,
-				map[string]string{"error": "failed to export apps"},
-				http.StatusInternalServerError)
-
-			return
-		}
-
-		h.respondJSON(writer, request, bundle, http.StatusOK)
-	}
-}
-
-// HandleAPIImportApps imports app configurations from a JSON request body via API.
-func (h *Handlers) HandleAPIImportApps() http.HandlerFunc {
-	return func(writer http.ResponseWriter, request *http.Request) {
-		request.Body = http.MaxBytesReader(writer, request.Body, importMaxBodyBytes)
-
-		var bundle app.BackupBundle
-
-		decodeErr := json.NewDecoder(request.Body).Decode(&bundle)
-		if decodeErr != nil {
-			h.respondJSON(writer, request,
-				map[string]string{"error": "invalid request body"},
-				http.StatusBadRequest)
-
-			return
-		}
-
-		if bundle.Version != 1 {
-			h.respondJSON(writer, request,
-				map[string]string{"error": fmt.Sprintf(
-					"unsupported backup version: %d", bundle.Version,
-				)},
-				http.StatusBadRequest)
-
-			return
-		}
-
-		if len(bundle.Apps) == 0 {
-			h.respondJSON(writer, request,
-				map[string]string{"error": "backup contains no apps"},
-				http.StatusBadRequest)
-
-			return
-		}
-
-		imported, skipped, importErr := h.appService.ImportApps(
-			request.Context(), &bundle,
-		)
-		if importErr != nil {
-			h.log.Error("api: failed to import apps", "error", importErr)
-			h.respondJSON(writer, request,
-				map[string]string{"error": "import failed: " + importErr.Error()},
-				http.StatusInternalServerError)
-
-			return
-		}
-
-		h.respondJSON(writer, request, map[string]any{
-			"imported": imported,
-			"skipped":  skipped,
-		}, http.StatusOK)
-	}
-}

internal/handlers/backup_test.go

@@ -1,582 +0,0 @@
-package handlers_test
-
-import (
-	"bytes"
-	"context"
-	"encoding/json"
-	"io"
-	"mime/multipart"
-	"net/http"
-	"net/http/httptest"
-	"strings"
-	"testing"
-
-	"github.com/stretchr/testify/assert"
-	"github.com/stretchr/testify/require"
-
-	"sneak.berlin/go/upaas/internal/models"
-	"sneak.berlin/go/upaas/internal/service/app"
-)
-
-// createTestAppWithConfig creates an app with env vars, labels, volumes, and ports.
-func createTestAppWithConfig(
-	t *testing.T,
-	tc *testContext,
-	name string,
-) *models.App {
-	t.Helper()
-
-	createdApp := createTestApp(t, tc, name)
-
-	// Add env vars
-	ev := models.NewEnvVar(tc.database)
-	ev.AppID = createdApp.ID
-	ev.Key = "DATABASE_URL"
-	ev.Value = "postgres://localhost/mydb"
-	require.NoError(t, ev.Save(context.Background()))
-
-	// Add label
-	label := models.NewLabel(tc.database)
-	label.AppID = createdApp.ID
-	label.Key = "traefik.enable"
-	label.Value = "true"
-	require.NoError(t, label.Save(context.Background()))
-
-	// Add volume
-	volume := models.NewVolume(tc.database)
-	volume.AppID = createdApp.ID
-	volume.HostPath = "/data/app"
-	volume.ContainerPath = "/app/data"
-	volume.ReadOnly = false
-	require.NoError(t, volume.Save(context.Background()))
-
-	// Add port
-	port := models.NewPort(tc.database)
-	port.AppID = createdApp.ID
-	port.HostPort = 8080
-	port.ContainerPort = 80
-	port.Protocol = models.PortProtocolTCP
-	require.NoError(t, port.Save(context.Background()))
-
-	return createdApp
-}
-
-// createTestAppWithConfigPort creates an app with a custom host port.
-func createTestAppWithConfigPort(
-	t *testing.T,
-	tc *testContext,
-	name string,
-	hostPort int,
-) *models.App {
-	t.Helper()
-
-	createdApp := createTestApp(t, tc, name)
-
-	ev := models.NewEnvVar(tc.database)
-	ev.AppID = createdApp.ID
-	ev.Key = "DATABASE_URL"
-	ev.Value = "postgres://localhost/mydb"
-	require.NoError(t, ev.Save(context.Background()))
-
-	port := models.NewPort(tc.database)
-	port.AppID = createdApp.ID
-	port.HostPort = hostPort
-	port.ContainerPort = 80
-	port.Protocol = models.PortProtocolTCP
-	require.NoError(t, port.Save(context.Background()))
-
-	return createdApp
-}
-
-func TestHandleExportApp(t *testing.T) {
-	t.Parallel()
-
-	testCtx := setupTestHandlers(t)
-	createdApp := createTestAppWithConfig(t, testCtx, "export-test-app")
-
-	request := httptest.NewRequest(http.MethodGet, "/apps/"+createdApp.ID+"/export", nil)
-	request = addChiURLParams(request, map[string]string{"id": createdApp.ID})
-
-	recorder := httptest.NewRecorder()
-
-	handler := testCtx.handlers.HandleExportApp()
-	handler.ServeHTTP(recorder, request)
-
-	assert.Equal(t, http.StatusOK, recorder.Code)
-	assert.Contains(t, recorder.Header().Get("Content-Type"), "application/json")
-	assert.Contains(t, recorder.Header().Get("Content-Disposition"), "attachment")
-	assert.Contains(t, recorder.Header().Get("Content-Disposition"), "export-test-app")
-
-	var bundle app.BackupBundle
-	require.NoError(t, json.Unmarshal(recorder.Body.Bytes(), &bundle))
-
-	assert.Equal(t, 1, bundle.Version)
-	assert.NotEmpty(t, bundle.ExportedAt)
-	require.Len(t, bundle.Apps, 1)
-
-	appBackup := bundle.Apps[0]
-	assert.Equal(t, "export-test-app", appBackup.Name)
-	assert.Equal(t, "main", appBackup.Branch)
-	assert.Len(t, appBackup.EnvVars, 1)
-	assert.Equal(t, "DATABASE_URL", appBackup.EnvVars[0].Key)
-	assert.Equal(t, "postgres://localhost/mydb", appBackup.EnvVars[0].Value)
-	assert.Len(t, appBackup.Labels, 1)
-	assert.Equal(t, "traefik.enable", appBackup.Labels[0].Key)
-	assert.Len(t, appBackup.Volumes, 1)
-	assert.Equal(t, "/data/app", appBackup.Volumes[0].HostPath)
-	assert.Len(t, appBackup.Ports, 1)
-	assert.Equal(t, 8080, appBackup.Ports[0].HostPort)
-}
-
-func TestHandleExportAppNotFound(t *testing.T) {
-	t.Parallel()
-
-	testCtx := setupTestHandlers(t)
-
-	request := httptest.NewRequest(http.MethodGet, "/apps/nonexistent/export", nil)
-	request = addChiURLParams(request, map[string]string{"id": "nonexistent"})
-
-	recorder := httptest.NewRecorder()
-
-	handler := testCtx.handlers.HandleExportApp()
-	handler.ServeHTTP(recorder, request)
-
-	assert.Equal(t, http.StatusNotFound, recorder.Code)
-}
-
-func TestHandleExportAllApps(t *testing.T) {
-	t.Parallel()
-
-	testCtx := setupTestHandlers(t)
-	createTestAppWithConfig(t, testCtx, "export-all-app1")
-	createTestAppWithConfigPort(t, testCtx, "export-all-app2", 8081)
-
-	request := httptest.NewRequest(http.MethodGet, "/backup/export", nil)
-	recorder := httptest.NewRecorder()
-
-	handler := testCtx.handlers.HandleExportAllApps()
-	handler.ServeHTTP(recorder, request)
-
-	assert.Equal(t, http.StatusOK, recorder.Code)
-	assert.Contains(t, recorder.Header().Get("Content-Disposition"), "upaas-backup-all")
-
-	var bundle app.BackupBundle
-	require.NoError(t, json.Unmarshal(recorder.Body.Bytes(), &bundle))
-
-	assert.Equal(t, 1, bundle.Version)
-	assert.Len(t, bundle.Apps, 2)
-}
-
-func TestHandleExportAllAppsEmpty(t *testing.T) {
-	t.Parallel()
-
-	testCtx := setupTestHandlers(t)
-
-	request := httptest.NewRequest(http.MethodGet, "/backup/export", nil)
-	recorder := httptest.NewRecorder()
-
-	handler := testCtx.handlers.HandleExportAllApps()
-	handler.ServeHTTP(recorder, request)
-
-	assert.Equal(t, http.StatusOK, recorder.Code)
-
-	var bundle app.BackupBundle
-	require.NoError(t, json.Unmarshal(recorder.Body.Bytes(), &bundle))
-
-	assert.Empty(t, bundle.Apps)
-}
-
-// createMultipartBackupRequest builds a multipart form request with backup JSON as a file upload.
-func createMultipartBackupRequest(
-	t *testing.T,
-	backupJSON string,
-) *http.Request {
-	t.Helper()
-
-	var body bytes.Buffer
-
-	writer := multipart.NewWriter(&body)
-
-	part, err := writer.CreateFormFile("backup_file", "backup.json")
-	require.NoError(t, err)
-
-	_, err = io.WriteString(part, backupJSON)
-	require.NoError(t, err)
-
-	require.NoError(t, writer.Close())
-
-	request := httptest.NewRequest(http.MethodPost, "/backup/import", &body)
-	request.Header.Set("Content-Type", writer.FormDataContentType())
-
-	return request
-}
-
-func TestHandleImportApps(t *testing.T) {
-	t.Parallel()
-
-	testCtx := setupTestHandlers(t)
-
-	backupJSON := `{
-		"version": 1,
-		"exportedAt": "2025-01-01T00:00:00Z",
-		"apps": [{
-			"name": "imported-app",
-			"repoUrl": "git@example.com:user/repo.git",
-			"branch": "main",
-			"dockerfilePath": "Dockerfile",
-			"envVars": [{"key": "FOO", "value": "bar"}],
-			"labels": [{"key": "app.name", "value": "test"}],
-			"volumes": [{"hostPath": "/data", "containerPath": "/app/data", "readOnly": true}],
-			"ports": [{"hostPort": 3000, "containerPort": 8080, "protocol": "tcp"}]
-		}]
-	}`
-
-	request := createMultipartBackupRequest(t, backupJSON)
-	recorder := httptest.NewRecorder()
-
-	handler := testCtx.handlers.HandleImportApps()
-	handler.ServeHTTP(recorder, request)
-
-	// Should redirect on success
-	assert.Equal(t, http.StatusSeeOther, recorder.Code)
-	assert.Contains(t, recorder.Header().Get("Location"), "success=")
-
-	// Verify the app was created
-	apps, err := models.AllApps(context.Background(), testCtx.database)
-	require.NoError(t, err)
-	require.Len(t, apps, 1)
-	assert.Equal(t, "imported-app", apps[0].Name)
-
-	// Verify env vars
-	envVars, _ := apps[0].GetEnvVars(context.Background())
-	require.Len(t, envVars, 1)
-	assert.Equal(t, "FOO", envVars[0].Key)
-	assert.Equal(t, "bar", envVars[0].Value)
-
-	// Verify labels
-	labels, _ := apps[0].GetLabels(context.Background())
-	require.Len(t, labels, 1)
-	assert.Equal(t, "app.name", labels[0].Key)
-
-	// Verify volumes
-	volumes, _ := apps[0].GetVolumes(context.Background())
-	require.Len(t, volumes, 1)
-	assert.Equal(t, "/data", volumes[0].HostPath)
-	assert.True(t, volumes[0].ReadOnly)
-
-	// Verify ports
-	ports, _ := apps[0].GetPorts(context.Background())
-	require.Len(t, ports, 1)
-	assert.Equal(t, 3000, ports[0].HostPort)
-	assert.Equal(t, 8080, ports[0].ContainerPort)
-}
-
-func TestHandleImportAppsSkipsDuplicateNames(t *testing.T) {
-	t.Parallel()
-
-	testCtx := setupTestHandlers(t)
-
-	// Create an existing app with same name
-	createTestApp(t, testCtx, "existing-app")
-
-	backupJSON := `{
-		"version": 1,
-		"exportedAt": "2025-01-01T00:00:00Z",
-		"apps": [
-			{
-				"name": "existing-app",
-				"repoUrl": "git@example.com:user/repo.git",
-				"branch": "main",
-				"dockerfilePath": "Dockerfile",
-				"envVars": [],
-				"labels": [],
-				"volumes": [],
-				"ports": []
-			},
-			{
-				"name": "new-app",
-				"repoUrl": "git@example.com:user/new.git",
-				"branch": "main",
-				"dockerfilePath": "Dockerfile",
-				"envVars": [],
-				"labels": [],
-				"volumes": [],
-				"ports": []
-			}
-		]
-	}`
-
-	request := createMultipartBackupRequest(t, backupJSON)
-	recorder := httptest.NewRecorder()
-
-	handler := testCtx.handlers.HandleImportApps()
-	handler.ServeHTTP(recorder, request)
-
-	assert.Equal(t, http.StatusSeeOther, recorder.Code)
-	assert.Contains(t, recorder.Header().Get("Location"), "skipped")
-
-	// Should have 2 apps total (existing + new)
-	apps, err := models.AllApps(context.Background(), testCtx.database)
-	require.NoError(t, err)
-	assert.Len(t, apps, 2)
-}
-
-func TestHandleImportAppsInvalidJSON(t *testing.T) {
-	t.Parallel()
-
-	testCtx := setupTestHandlers(t)
-
-	request := createMultipartBackupRequest(t, "not valid json")
-	recorder := httptest.NewRecorder()
-
-	handler := testCtx.handlers.HandleImportApps()
-	handler.ServeHTTP(recorder, request)
-
-	// Should render the page with error, not redirect
-	assert.Equal(t, http.StatusOK, recorder.Code)
-	assert.Contains(t, recorder.Body.String(), "Invalid backup file")
-}
-
-func TestHandleImportAppsUnsupportedVersion(t *testing.T) {
-	t.Parallel()
-
-	testCtx := setupTestHandlers(t)
-
-	backupJSON := `{"version": 99, "exportedAt": "2025-01-01T00:00:00Z", "apps": [{"name": "test"}]}`
-
-	request := createMultipartBackupRequest(t, backupJSON)
-	recorder := httptest.NewRecorder()
-
-	handler := testCtx.handlers.HandleImportApps()
-	handler.ServeHTTP(recorder, request)
-
-	assert.Equal(t, http.StatusOK, recorder.Code)
-	assert.Contains(t, recorder.Body.String(), "Unsupported backup version")
-}
-
-func TestHandleImportAppsEmptyBundle(t *testing.T) {
-	t.Parallel()
-
-	testCtx := setupTestHandlers(t)
-
-	backupJSON := `{"version": 1, "exportedAt": "2025-01-01T00:00:00Z", "apps": []}`
-
-	request := createMultipartBackupRequest(t, backupJSON)
-	recorder := httptest.NewRecorder()
-
-	handler := testCtx.handlers.HandleImportApps()
-	handler.ServeHTTP(recorder, request)
-
-	assert.Equal(t, http.StatusOK, recorder.Code)
-	assert.Contains(t, recorder.Body.String(), "contains no apps")
-}
-
-func TestHandleImportPage(t *testing.T) {
-	t.Parallel()
-
-	testCtx := setupTestHandlers(t)
-
-	request := httptest.NewRequest(http.MethodGet, "/backup/import", nil)
-	recorder := httptest.NewRecorder()
-
-	handler := testCtx.handlers.HandleImportPage()
-	handler.ServeHTTP(recorder, request)
-
-	assert.Equal(t, http.StatusOK, recorder.Code)
-	assert.Contains(t, recorder.Body.String(), "Import Backup")
-}
-
-func TestExportImportRoundTrip(t *testing.T) {
-	t.Parallel()
-
-	testCtx := setupTestHandlers(t)
-	createTestAppWithConfig(t, testCtx, "roundtrip-app")
-
-	// Export
-	exportReq := httptest.NewRequest(http.MethodGet, "/backup/export", nil)
-	exportRec := httptest.NewRecorder()
-
-	testCtx.handlers.HandleExportAllApps().ServeHTTP(exportRec, exportReq)
-
-	require.Equal(t, http.StatusOK, exportRec.Code)
-
-	exportedJSON := exportRec.Body.String()
-
-	// Delete the original app
-	apps, _ := models.AllApps(context.Background(), testCtx.database)
-	for _, a := range apps {
-		require.NoError(t, a.Delete(context.Background()))
-	}
-
-	// Import
-	importReq := createMultipartBackupRequest(t, exportedJSON)
-	importRec := httptest.NewRecorder()
-
-	testCtx.handlers.HandleImportApps().ServeHTTP(importRec, importReq)
-
-	assert.Equal(t, http.StatusSeeOther, importRec.Code)
-
-	// Verify the app was recreated with all config
-	restoredApps, _ := models.AllApps(context.Background(), testCtx.database)
-	require.Len(t, restoredApps, 1)
-	assert.Equal(t, "roundtrip-app", restoredApps[0].Name)
-
-	envVars, _ := restoredApps[0].GetEnvVars(context.Background())
-	assert.Len(t, envVars, 1)
-
-	labels, _ := restoredApps[0].GetLabels(context.Background())
-	assert.Len(t, labels, 1)
-
-	volumes, _ := restoredApps[0].GetVolumes(context.Background())
-	assert.Len(t, volumes, 1)
-
-	ports, _ := restoredApps[0].GetPorts(context.Background())
-	assert.Len(t, ports, 1)
-}
-
-// TestAPIExportApp tests the API endpoint for exporting a single app.
-func TestAPIExportApp(t *testing.T) {
-	t.Parallel()
-
-	tc, cookies := setupAPITest(t)
-
-	createdApp, err := tc.appSvc.CreateApp(t.Context(), app.CreateAppInput{
-		Name:    "api-export-app",
-		RepoURL: "git@example.com:user/repo.git",
-	})
-	require.NoError(t, err)
-
-	rr := apiGet(t, tc, cookies, "/api/v1/apps/"+createdApp.ID+"/export")
-	assert.Equal(t, http.StatusOK, rr.Code)
-
-	var bundle app.BackupBundle
-	require.NoError(t, json.Unmarshal(rr.Body.Bytes(), &bundle))
-
-	assert.Equal(t, 1, bundle.Version)
-	require.Len(t, bundle.Apps, 1)
-	assert.Equal(t, "api-export-app", bundle.Apps[0].Name)
-}
-
-// TestAPIExportAppNotFound tests the API endpoint for a nonexistent app.
-func TestAPIExportAppNotFound(t *testing.T) {
-	t.Parallel()
-
-	tc, cookies := setupAPITest(t)
-
-	rr := apiGet(t, tc, cookies, "/api/v1/apps/nonexistent/export")
-	assert.Equal(t, http.StatusNotFound, rr.Code)
-}
-
-// TestAPIExportAllApps tests the API endpoint for exporting all apps.
-func TestAPIExportAllApps(t *testing.T) {
-	t.Parallel()
-
-	tc, cookies := setupAPITest(t)
-
-	_, err := tc.appSvc.CreateApp(t.Context(), app.CreateAppInput{
-		Name:    "api-export-all-1",
-		RepoURL: "git@example.com:user/repo1.git",
-	})
-	require.NoError(t, err)
-
-	_, err = tc.appSvc.CreateApp(t.Context(), app.CreateAppInput{
-		Name:    "api-export-all-2",
-		RepoURL: "git@example.com:user/repo2.git",
-	})
-	require.NoError(t, err)
-
-	rr := apiGet(t, tc, cookies, "/api/v1/backup/export")
-	assert.Equal(t, http.StatusOK, rr.Code)
-
-	var bundle app.BackupBundle
-	require.NoError(t, json.Unmarshal(rr.Body.Bytes(), &bundle))
-
-	assert.Len(t, bundle.Apps, 2)
-}
-
-// TestAPIImportApps tests the API import endpoint.
-func TestAPIImportApps(t *testing.T) {
-	t.Parallel()
-
-	tc, cookies := setupAPITest(t)
-
-	backupJSON := `{
-		"version": 1,
-		"exportedAt": "2025-01-01T00:00:00Z",
-		"apps": [{
-			"name": "api-imported-app",
-			"repoUrl": "git@example.com:user/repo.git",
-			"branch": "main",
-			"dockerfilePath": "Dockerfile",
-			"envVars": [],
-			"labels": [],
-			"volumes": [],
-			"ports": []
-		}]
-	}`
-
-	r := apiRouter(tc)
-
-	req := httptest.NewRequest(http.MethodPost, "/api/v1/backup/import", strings.NewReader(backupJSON))
-	req.Header.Set("Content-Type", "application/json")
-
-	for _, c := range cookies {
-		req.AddCookie(c)
-	}
-
-	rr := httptest.NewRecorder()
-	r.ServeHTTP(rr, req)
-
-	assert.Equal(t, http.StatusOK, rr.Code)
-
-	var resp map[string]any
-	require.NoError(t, json.Unmarshal(rr.Body.Bytes(), &resp))
-
-	imported, ok := resp["imported"].([]any)
-	require.True(t, ok)
-	assert.Len(t, imported, 1)
-	assert.Equal(t, "api-imported-app", imported[0])
-}
-
-// TestAPIImportAppsInvalidBody tests that the API rejects bad JSON.
-func TestAPIImportAppsInvalidBody(t *testing.T) {
-	t.Parallel()
-
-	tc, cookies := setupAPITest(t)
-
-	r := apiRouter(tc)
-
-	req := httptest.NewRequest(http.MethodPost, "/api/v1/backup/import", strings.NewReader("not json"))
-	req.Header.Set("Content-Type", "application/json")
-
-	for _, c := range cookies {
-		req.AddCookie(c)
-	}
-
-	rr := httptest.NewRecorder()
-	r.ServeHTTP(rr, req)
-
-	assert.Equal(t, http.StatusBadRequest, rr.Code)
-}
-
-// TestAPIImportAppsUnsupportedVersion tests that the API rejects bad versions.
-func TestAPIImportAppsUnsupportedVersion(t *testing.T) {
-	t.Parallel()
-
-	tc, cookies := setupAPITest(t)
-
-	r := apiRouter(tc)
-
-	body := `{"version": 42, "apps": [{"name": "x"}]}`
-	req := httptest.NewRequest(http.MethodPost, "/api/v1/backup/import", strings.NewReader(body))
-	req.Header.Set("Content-Type", "application/json")
-
-	for _, c := range cookies {
-		req.AddCookie(c)
-	}
-
-	rr := httptest.NewRecorder()
-	r.ServeHTTP(rr, req)
-
-	assert.Equal(t, http.StatusBadRequest, rr.Code)
-}

internal/handlers/resource_limits_test.go

@@ -0,0 +1,195 @@
+package handlers //nolint:testpackage // tests unexported parsing functions
+
+import (
+	"database/sql"
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+	"github.com/stretchr/testify/require"
+)
+
+func TestParseOptionalFloat64(t *testing.T) {
+	t.Parallel()
+
+	t.Run("empty string returns invalid", func(t *testing.T) {
+		t.Parallel()
+
+		result, err := parseOptionalFloat64("")
+		require.NoError(t, err)
+		assert.False(t, result.Valid)
+	})
+
+	t.Run("whitespace only returns invalid", func(t *testing.T) {
+		t.Parallel()
+
+		result, err := parseOptionalFloat64("   ")
+		require.NoError(t, err)
+		assert.False(t, result.Valid)
+	})
+
+	t.Run("valid float", func(t *testing.T) {
+		t.Parallel()
+
+		result, err := parseOptionalFloat64("0.5")
+		require.NoError(t, err)
+		assert.True(t, result.Valid)
+		assert.InDelta(t, 0.5, result.Float64, 0.001)
+	})
+
+	t.Run("valid integer", func(t *testing.T) {
+		t.Parallel()
+
+		result, err := parseOptionalFloat64("2")
+		require.NoError(t, err)
+		assert.True(t, result.Valid)
+		assert.InDelta(t, 2.0, result.Float64, 0.001)
+	})
+
+	t.Run("negative value rejected", func(t *testing.T) {
+		t.Parallel()
+
+		_, err := parseOptionalFloat64("-1")
+		require.Error(t, err)
+	})
+
+	t.Run("zero value rejected", func(t *testing.T) {
+		t.Parallel()
+
+		_, err := parseOptionalFloat64("0")
+		require.Error(t, err)
+	})
+
+	t.Run("non-numeric rejected", func(t *testing.T) {
+		t.Parallel()
+
+		_, err := parseOptionalFloat64("abc")
+		require.Error(t, err)
+	})
+}
+
+func TestParseOptionalMemoryBytes(t *testing.T) { //nolint:funlen // table-driven test
+	t.Parallel()
+
+	t.Run("empty string returns invalid", func(t *testing.T) {
+		t.Parallel()
+
+		result, err := parseOptionalMemoryBytes("")
+		require.NoError(t, err)
+		assert.False(t, result.Valid)
+	})
+
+	t.Run("whitespace only returns invalid", func(t *testing.T) {
+		t.Parallel()
+
+		result, err := parseOptionalMemoryBytes("   ")
+		require.NoError(t, err)
+		assert.False(t, result.Valid)
+	})
+
+	t.Run("plain bytes", func(t *testing.T) {
+		t.Parallel()
+
+		result, err := parseOptionalMemoryBytes("536870912")
+		require.NoError(t, err)
+		assert.True(t, result.Valid)
+		assert.Equal(t, int64(536870912), result.Int64)
+	})
+
+	t.Run("megabytes suffix", func(t *testing.T) {
+		t.Parallel()
+
+		result, err := parseOptionalMemoryBytes("256m")
+		require.NoError(t, err)
+		assert.True(t, result.Valid)
+		assert.Equal(t, int64(256*1024*1024), result.Int64)
+	})
+
+	t.Run("megabytes suffix uppercase", func(t *testing.T) {
+		t.Parallel()
+
+		result, err := parseOptionalMemoryBytes("256M")
+		require.NoError(t, err)
+		assert.True(t, result.Valid)
+		assert.Equal(t, int64(256*1024*1024), result.Int64)
+	})
+
+	t.Run("gigabytes suffix", func(t *testing.T) {
+		t.Parallel()
+
+		result, err := parseOptionalMemoryBytes("1g")
+		require.NoError(t, err)
+		assert.True(t, result.Valid)
+		assert.Equal(t, int64(1024*1024*1024), result.Int64)
+	})
+
+	t.Run("kilobytes suffix", func(t *testing.T) {
+		t.Parallel()
+
+		result, err := parseOptionalMemoryBytes("512k")
+		require.NoError(t, err)
+		assert.True(t, result.Valid)
+		assert.Equal(t, int64(512*1024), result.Int64)
+	})
+
+	t.Run("fractional gigabytes", func(t *testing.T) {
+		t.Parallel()
+
+		result, err := parseOptionalMemoryBytes("1.5g")
+		require.NoError(t, err)
+		assert.True(t, result.Valid)
+		assert.Equal(t, int64(1.5*1024*1024*1024), result.Int64)
+	})
+
+	t.Run("negative value rejected", func(t *testing.T) {
+		t.Parallel()
+
+		_, err := parseOptionalMemoryBytes("-256m")
+		require.Error(t, err)
+	})
+
+	t.Run("zero value rejected", func(t *testing.T) {
+		t.Parallel()
+
+		_, err := parseOptionalMemoryBytes("0")
+		require.Error(t, err)
+	})
+
+	t.Run("invalid string rejected", func(t *testing.T) {
+		t.Parallel()
+
+		_, err := parseOptionalMemoryBytes("abc")
+		require.Error(t, err)
+	})
+
+	t.Run("negative plain bytes rejected", func(t *testing.T) {
+		t.Parallel()
+
+		_, err := parseOptionalMemoryBytes("-100")
+		require.Error(t, err)
+	})
+}
+
+func TestAppResourceLimitsRoundTrip(t *testing.T) {
+	t.Parallel()
+
+	// Test that parsing and formatting are consistent
+	tests := []struct {
+		input    string
+		expected sql.NullInt64
+		format   string
+	}{
+		{"256m", sql.NullInt64{Int64: 256 * 1024 * 1024, Valid: true}, "256m"},
+		{"1g", sql.NullInt64{Int64: 1024 * 1024 * 1024, Valid: true}, "1g"},
+		{"512k", sql.NullInt64{Int64: 512 * 1024, Valid: true}, "512k"},
+	}
+
+	for _, tt := range tests {
+		t.Run(tt.input, func(t *testing.T) {
+			t.Parallel()
+
+			result, err := parseOptionalMemoryBytes(tt.input)
+			require.NoError(t, err)
+			assert.Equal(t, tt.expected, result)
+		})
+	}
+}

internal/models/app.go

@@ -14,7 +14,8 @@ import (
 const appColumns = `id, name, repo_url, branch, dockerfile_path, webhook_secret,
 			ssh_private_key, ssh_public_key, image_id, status,
 			docker_network, ntfy_topic, slack_webhook, webhook_secret_hash,
-			previous_image_id, created_at, updated_at`
+			previous_image_id, cpu_limit, memory_limit,
+			created_at, updated_at`
 
 // AppStatus represents the status of an app.
 type AppStatus string
@@ -47,6 +48,8 @@ type App struct {
 	DockerNetwork     sql.NullString
 	NtfyTopic         sql.NullString
 	SlackWebhook      sql.NullString
+	CPULimit          sql.NullFloat64
+	MemoryLimit       sql.NullInt64
 	CreatedAt         time.Time
 	UpdatedAt         time.Time
 }
@@ -142,14 +145,14 @@ func (a *App) insert(ctx context.Context) error {
 			id, name, repo_url, branch, dockerfile_path, webhook_secret,
 			ssh_private_key, ssh_public_key, image_id, status,
 			docker_network, ntfy_topic, slack_webhook, webhook_secret_hash,
-			previous_image_id
-		) VALUES (?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?)`
+			previous_image_id, cpu_limit, memory_limit
+		) VALUES (?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?)`
 
 	_, err := a.db.Exec(ctx, query,
 		a.ID, a.Name, a.RepoURL, a.Branch, a.DockerfilePath, a.WebhookSecret,
 		a.SSHPrivateKey, a.SSHPublicKey, a.ImageID, a.Status,
 		a.DockerNetwork, a.NtfyTopic, a.SlackWebhook, a.WebhookSecretHash,
-		a.PreviousImageID,
+		a.PreviousImageID, a.CPULimit, a.MemoryLimit,
 	)
 	if err != nil {
 		return err
@@ -165,6 +168,7 @@ func (a *App) update(ctx context.Context) error {
 			image_id = ?, status = ?,
 			docker_network = ?, ntfy_topic = ?, slack_webhook = ?,
 			previous_image_id = ?,
+			cpu_limit = ?, memory_limit = ?,
 			updated_at = CURRENT_TIMESTAMP
 		WHERE id = ?`
 
@@ -173,6 +177,7 @@ func (a *App) update(ctx context.Context) error {
 		a.ImageID, a.Status,
 		a.DockerNetwork, a.NtfyTopic, a.SlackWebhook,
 		a.PreviousImageID,
+		a.CPULimit, a.MemoryLimit,
 		a.ID,
 	)
 
@@ -188,6 +193,7 @@ func (a *App) scan(row *sql.Row) error {
 		&a.DockerNetwork, &a.NtfyTopic, &a.SlackWebhook,
 		&a.WebhookSecretHash,
 		&a.PreviousImageID,
+		&a.CPULimit, &a.MemoryLimit,
 		&a.CreatedAt, &a.UpdatedAt,
 	)
 }
@@ -206,6 +212,7 @@ func scanApps(appDB *database.Database, rows *sql.Rows) ([]*App, error) {
 			&app.DockerNetwork, &app.NtfyTopic, &app.SlackWebhook,
 			&app.WebhookSecretHash,
 			&app.PreviousImageID,
+			&app.CPULimit, &app.MemoryLimit,
 			&app.CreatedAt, &app.UpdatedAt,
 		)
 		if scanErr != nil {

internal/models/models_test.go

@@ -781,6 +781,96 @@ func TestCascadeDelete(t *testing.T) {
 	})
 }
 
+// Resource Limits Tests.
+
+func TestAppResourceLimits(t *testing.T) { //nolint:funlen // integration test with multiple subtests
+	t.Parallel()
+
+	t.Run("saves and loads CPU limit", func(t *testing.T) {
+		t.Parallel()
+
+		testDB, cleanup := setupTestDB(t)
+		defer cleanup()
+
+		app := createTestApp(t, testDB)
+
+		app.CPULimit = sql.NullFloat64{Float64: 0.5, Valid: true}
+
+		err := app.Save(context.Background())
+		require.NoError(t, err)
+
+		found, err := models.FindApp(context.Background(), testDB, app.ID)
+		require.NoError(t, err)
+		require.NotNil(t, found)
+		assert.True(t, found.CPULimit.Valid)
+		assert.InDelta(t, 0.5, found.CPULimit.Float64, 0.001)
+	})
+
+	t.Run("saves and loads memory limit", func(t *testing.T) {
+		t.Parallel()
+
+		testDB, cleanup := setupTestDB(t)
+		defer cleanup()
+
+		app := createTestApp(t, testDB)
+
+		app.MemoryLimit = sql.NullInt64{Int64: 536870912, Valid: true} // 512m
+
+		err := app.Save(context.Background())
+		require.NoError(t, err)
+
+		found, err := models.FindApp(context.Background(), testDB, app.ID)
+		require.NoError(t, err)
+		require.NotNil(t, found)
+		assert.True(t, found.MemoryLimit.Valid)
+		assert.Equal(t, int64(536870912), found.MemoryLimit.Int64)
+	})
+
+	t.Run("null limits by default", func(t *testing.T) {
+		t.Parallel()
+
+		testDB, cleanup := setupTestDB(t)
+		defer cleanup()
+
+		app := createTestApp(t, testDB)
+
+		found, err := models.FindApp(context.Background(), testDB, app.ID)
+		require.NoError(t, err)
+		require.NotNil(t, found)
+		assert.False(t, found.CPULimit.Valid)
+		assert.False(t, found.MemoryLimit.Valid)
+	})
+
+	t.Run("clears limits when set to null", func(t *testing.T) {
+		t.Parallel()
+
+		testDB, cleanup := setupTestDB(t)
+		defer cleanup()
+
+		app := createTestApp(t, testDB)
+
+		// Set limits
+		app.CPULimit = sql.NullFloat64{Float64: 1.0, Valid: true}
+		app.MemoryLimit = sql.NullInt64{Int64: 1073741824, Valid: true} // 1g
+
+		err := app.Save(context.Background())
+		require.NoError(t, err)
+
+		// Clear limits
+		app.CPULimit = sql.NullFloat64{}
+		app.MemoryLimit = sql.NullInt64{}
+
+		err = app.Save(context.Background())
+		require.NoError(t, err)
+
+		found, err := models.FindApp(context.Background(), testDB, app.ID)
+		require.NoError(t, err)
+		require.NotNil(t, found)
+		assert.False(t, found.CPULimit.Valid)
+		assert.False(t, found.MemoryLimit.Valid)
+	})
+}
+
 // Helper function to create a test app.
 func createTestApp(t *testing.T, testDB *database.Database) *models.App {
 	t.Helper()

internal/server/routes.go

@@ -98,12 +98,6 @@ func (s *Server) SetupRoutes() {
 			// Ports
 			r.Post("/apps/{id}/ports", s.handlers.HandlePortAdd())
 			r.Post("/apps/{id}/ports/{portID}/delete", s.handlers.HandlePortDelete())
-
-			// Backup/Restore
-			r.Get("/apps/{id}/export", s.handlers.HandleExportApp())
-			r.Get("/backup/export", s.handlers.HandleExportAllApps())
-			r.Get("/backup/import", s.handlers.HandleImportPage())
-			r.Post("/backup/import", s.handlers.HandleImportApps())
 		})
 	})
 
@@ -121,11 +115,6 @@ func (s *Server) SetupRoutes() {
 			r.Get("/apps", s.handlers.HandleAPIListApps())
 			r.Get("/apps/{id}", s.handlers.HandleAPIGetApp())
 			r.Get("/apps/{id}/deployments", s.handlers.HandleAPIListDeployments())
-
-			// Backup/Restore API
-			r.Get("/apps/{id}/export", s.handlers.HandleAPIExportApp())
-			r.Get("/backup/export", s.handlers.HandleAPIExportAllApps())
-			r.Post("/backup/import", s.handlers.HandleAPIImportApps())
 		})
 	})
 

internal/service/app/backup.go

@@ -1,391 +0,0 @@
-package app
-
-import (
-	"context"
-	"fmt"
-	"time"
-
-	"sneak.berlin/go/upaas/internal/models"
-)
-
-// BackupEnvVar represents an environment variable in a backup.
-type BackupEnvVar struct {
-	Key   string `json:"key"`
-	Value string `json:"value"`
-}
-
-// BackupLabel represents a Docker label in a backup.
-type BackupLabel struct {
-	Key   string `json:"key"`
-	Value string `json:"value"`
-}
-
-// BackupVolume represents a volume mount in a backup.
-type BackupVolume struct {
-	HostPath      string `json:"hostPath"`
-	ContainerPath string `json:"containerPath"`
-	ReadOnly      bool   `json:"readOnly"`
-}
-
-// BackupPort represents a port mapping in a backup.
-type BackupPort struct {
-	HostPort      int    `json:"hostPort"`
-	ContainerPort int    `json:"containerPort"`
-	Protocol      string `json:"protocol"`
-}
-
-// Backup represents the exported configuration of a single app.
-type Backup struct {
-	Name           string         `json:"name"`
-	RepoURL        string         `json:"repoUrl"`
-	Branch         string         `json:"branch"`
-	DockerfilePath string         `json:"dockerfilePath"`
-	DockerNetwork  string         `json:"dockerNetwork,omitempty"`
-	NtfyTopic      string         `json:"ntfyTopic,omitempty"`
-	SlackWebhook   string         `json:"slackWebhook,omitempty"`
-	EnvVars        []BackupEnvVar `json:"envVars"`
-	Labels         []BackupLabel  `json:"labels"`
-	Volumes        []BackupVolume `json:"volumes"`
-	Ports          []BackupPort   `json:"ports"`
-}
-
-// BackupBundle represents a complete backup of one or more apps.
-type BackupBundle struct {
-	Version    int      `json:"version"`
-	ExportedAt string   `json:"exportedAt"`
-	Apps       []Backup `json:"apps"`
-}
-
-// backupVersion is the current backup format version.
-const backupVersion = 1
-
-// ExportApp exports a single app's configuration as a BackupBundle.
-func (svc *Service) ExportApp(
-	ctx context.Context,
-	application *models.App,
-) (*BackupBundle, error) {
-	appBackup, err := svc.buildAppBackup(ctx, application)
-	if err != nil {
-		return nil, err
-	}
-
-	return &BackupBundle{
-		Version:    backupVersion,
-		ExportedAt: time.Now().UTC().Format(time.RFC3339),
-		Apps:       []Backup{appBackup},
-	}, nil
-}
-
-// ExportAllApps exports all app configurations as a BackupBundle.
-func (svc *Service) ExportAllApps(ctx context.Context) (*BackupBundle, error) {
-	apps, err := models.AllApps(ctx, svc.db)
-	if err != nil {
-		return nil, fmt.Errorf("listing apps for export: %w", err)
-	}
-
-	backups := make([]Backup, 0, len(apps))
-
-	for _, application := range apps {
-		appBackup, buildErr := svc.buildAppBackup(ctx, application)
-		if buildErr != nil {
-			return nil, buildErr
-		}
-
-		backups = append(backups, appBackup)
-	}
-
-	return &BackupBundle{
-		Version:    backupVersion,
-		ExportedAt: time.Now().UTC().Format(time.RFC3339),
-		Apps:       backups,
-	}, nil
-}
-
-// ImportApps imports app configurations from a BackupBundle.
-// It creates new apps (with fresh IDs, SSH keys, and webhook secrets)
-// and populates their env vars, labels, volumes, and ports.
-// Apps whose names conflict with existing apps are skipped and reported.
-func (svc *Service) ImportApps(
-	ctx context.Context,
-	bundle *BackupBundle,
-) ([]string, []string, error) {
-	// Build a set of existing app names for conflict detection
-	existingApps, listErr := models.AllApps(ctx, svc.db)
-	if listErr != nil {
-		return nil, nil, fmt.Errorf("listing existing apps: %w", listErr)
-	}
-
-	existingNames := make(map[string]bool, len(existingApps))
-	for _, a := range existingApps {
-		existingNames[a.Name] = true
-	}
-
-	var imported, skipped []string
-
-	for _, ab := range bundle.Apps {
-		if existingNames[ab.Name] {
-			skipped = append(skipped, ab.Name)
-
-			continue
-		}
-
-		importErr := svc.importSingleApp(ctx, ab)
-		if importErr != nil {
-			return imported, skipped, fmt.Errorf(
-				"importing app %q: %w", ab.Name, importErr,
-			)
-		}
-
-		imported = append(imported, ab.Name)
-	}
-
-	return imported, skipped, nil
-}
-
-// importSingleApp creates a single app from backup data.
-func (svc *Service) importSingleApp(
-	ctx context.Context,
-	ab Backup,
-) error {
-	createdApp, createErr := svc.CreateApp(ctx, CreateAppInput{
-		Name:           ab.Name,
-		RepoURL:        ab.RepoURL,
-		Branch:         ab.Branch,
-		DockerfilePath: ab.DockerfilePath,
-		DockerNetwork:  ab.DockerNetwork,
-		NtfyTopic:      ab.NtfyTopic,
-		SlackWebhook:   ab.SlackWebhook,
-	})
-	if createErr != nil {
-		return fmt.Errorf("creating app: %w", createErr)
-	}
-
-	envErr := svc.importEnvVars(ctx, createdApp.ID, ab.EnvVars)
-	if envErr != nil {
-		return envErr
-	}
-
-	labelErr := svc.importLabels(ctx, createdApp.ID, ab.Labels)
-	if labelErr != nil {
-		return labelErr
-	}
-
-	volErr := svc.importVolumes(ctx, createdApp.ID, ab.Volumes)
-	if volErr != nil {
-		return volErr
-	}
-
-	portErr := svc.importPorts(ctx, createdApp.ID, ab.Ports)
-	if portErr != nil {
-		return portErr
-	}
-
-	svc.log.Info("app imported from backup",
-		"id", createdApp.ID, "name", createdApp.Name)
-
-	return nil
-}
-
-// importEnvVars adds env vars from backup to an app.
-func (svc *Service) importEnvVars(
-	ctx context.Context,
-	appID string,
-	envVars []BackupEnvVar,
-) error {
-	for _, ev := range envVars {
-		addErr := svc.AddEnvVar(ctx, appID, ev.Key, ev.Value)
-		if addErr != nil {
-			return fmt.Errorf("adding env var %q: %w", ev.Key, addErr)
-		}
-	}
-
-	return nil
-}
-
-// importLabels adds labels from backup to an app.
-func (svc *Service) importLabels(
-	ctx context.Context,
-	appID string,
-	labels []BackupLabel,
-) error {
-	for _, l := range labels {
-		addErr := svc.AddLabel(ctx, appID, l.Key, l.Value)
-		if addErr != nil {
-			return fmt.Errorf("adding label %q: %w", l.Key, addErr)
-		}
-	}
-
-	return nil
-}
-
-// importVolumes adds volumes from backup to an app.
-func (svc *Service) importVolumes(
-	ctx context.Context,
-	appID string,
-	volumes []BackupVolume,
-) error {
-	for _, v := range volumes {
-		addErr := svc.AddVolume(ctx, appID, v.HostPath, v.ContainerPath, v.ReadOnly)
-		if addErr != nil {
-			return fmt.Errorf("adding volume %q: %w", v.ContainerPath, addErr)
-		}
-	}
-
-	return nil
-}
-
-// importPorts adds ports from backup to an app.
-func (svc *Service) importPorts(
-	ctx context.Context,
-	appID string,
-	ports []BackupPort,
-) error {
-	for _, p := range ports {
-		port := models.NewPort(svc.db)
-		port.AppID = appID
-		port.HostPort = p.HostPort
-		port.ContainerPort = p.ContainerPort
-		port.Protocol = models.PortProtocol(p.Protocol)
-
-		if port.Protocol == "" {
-			port.Protocol = models.PortProtocolTCP
-		}
-
-		saveErr := port.Save(ctx)
-		if saveErr != nil {
-			return fmt.Errorf("adding port %d: %w", p.HostPort, saveErr)
-		}
-	}
-
-	return nil
-}
-
-// buildAppBackup collects all configuration for a single app into a Backup.
-func (svc *Service) buildAppBackup(
-	ctx context.Context,
-	application *models.App,
-) (Backup, error) {
-	envVars, labels, volumes, ports, err := svc.fetchAppResources(ctx, application)
-	if err != nil {
-		return Backup{}, err
-	}
-
-	backup := Backup{
-		Name:           application.Name,
-		RepoURL:        application.RepoURL,
-		Branch:         application.Branch,
-		DockerfilePath: application.DockerfilePath,
-		EnvVars:        convertEnvVars(envVars),
-		Labels:         convertLabels(labels),
-		Volumes:        convertVolumes(volumes),
-		Ports:          convertPorts(ports),
-	}
-
-	if application.DockerNetwork.Valid {
-		backup.DockerNetwork = application.DockerNetwork.String
-	}
-
-	if application.NtfyTopic.Valid {
-		backup.NtfyTopic = application.NtfyTopic.String
-	}
-
-	if application.SlackWebhook.Valid {
-		backup.SlackWebhook = application.SlackWebhook.String
-	}
-
-	return backup, nil
-}
-
-// fetchAppResources retrieves all sub-resources for an app.
-func (svc *Service) fetchAppResources(
-	ctx context.Context,
-	application *models.App,
-) ([]*models.EnvVar, []*models.Label, []*models.Volume, []*models.Port, error) {
-	envVars, err := application.GetEnvVars(ctx)
-	if err != nil {
-		return nil, nil, nil, nil, fmt.Errorf(
-			"getting env vars for %q: %w", application.Name, err,
-		)
-	}
-
-	labels, err := application.GetLabels(ctx)
-	if err != nil {
-		return nil, nil, nil, nil, fmt.Errorf(
-			"getting labels for %q: %w", application.Name, err,
-		)
-	}
-
-	volumes, err := application.GetVolumes(ctx)
-	if err != nil {
-		return nil, nil, nil, nil, fmt.Errorf(
-			"getting volumes for %q: %w", application.Name, err,
-		)
-	}
-
-	ports, err := application.GetPorts(ctx)
-	if err != nil {
-		return nil, nil, nil, nil, fmt.Errorf(
-			"getting ports for %q: %w", application.Name, err,
-		)
-	}
-
-	return envVars, labels, volumes, ports, nil
-}
-
-// convertEnvVars converts model env vars to backup format.
-func convertEnvVars(envVars []*models.EnvVar) []BackupEnvVar {
-	result := make([]BackupEnvVar, 0, len(envVars))
-
-	for _, ev := range envVars {
-		result = append(result, BackupEnvVar{
-			Key:   ev.Key,
-			Value: ev.Value,
-		})
-	}
-
-	return result
-}
-
-// convertLabels converts model labels to backup format.
-func convertLabels(labels []*models.Label) []BackupLabel {
-	result := make([]BackupLabel, 0, len(labels))
-
-	for _, l := range labels {
-		result = append(result, BackupLabel{
-			Key:   l.Key,
-			Value: l.Value,
-		})
-	}
-
-	return result
-}
-
-// convertVolumes converts model volumes to backup format.
-func convertVolumes(volumes []*models.Volume) []BackupVolume {
-	result := make([]BackupVolume, 0, len(volumes))
-
-	for _, v := range volumes {
-		result = append(result, BackupVolume{
-			HostPath:      v.HostPath,
-			ContainerPath: v.ContainerPath,
-			ReadOnly:      v.ReadOnly,
-		})
-	}
-
-	return result
-}
-
-// convertPorts converts model ports to backup format.
-func convertPorts(ports []*models.Port) []BackupPort {
-	result := make([]BackupPort, 0, len(ports))
-
-	for _, p := range ports {
-		result = append(result, BackupPort{
-			HostPort:      p.HostPort,
-			ContainerPort: p.ContainerPort,
-			Protocol:      string(p.Protocol),
-		})
-	}
-
-	return result
-}

internal/service/app/backup_test.go

@@ -1,379 +0,0 @@
-package app_test
-
-import (
-	"context"
-	"testing"
-
-	"github.com/stretchr/testify/assert"
-	"github.com/stretchr/testify/require"
-	"go.uber.org/fx"
-
-	"sneak.berlin/go/upaas/internal/config"
-	"sneak.berlin/go/upaas/internal/database"
-	"sneak.berlin/go/upaas/internal/globals"
-	"sneak.berlin/go/upaas/internal/logger"
-	"sneak.berlin/go/upaas/internal/models"
-	"sneak.berlin/go/upaas/internal/service/app"
-)
-
-// backupTestContext bundles test dependencies for backup tests.
-type backupTestContext struct {
-	svc *app.Service
-	db  *database.Database
-}
-
-func setupBackupTest(t *testing.T) *backupTestContext {
-	t.Helper()
-
-	tmpDir := t.TempDir()
-
-	globals.SetAppname("upaas-test")
-	globals.SetVersion("test")
-
-	globalsInst, err := globals.New(fx.Lifecycle(nil))
-	require.NoError(t, err)
-
-	loggerInst, err := logger.New(
-		fx.Lifecycle(nil),
-		logger.Params{Globals: globalsInst},
-	)
-	require.NoError(t, err)
-
-	cfg := &config.Config{
-		Port:          8080,
-		DataDir:       tmpDir,
-		SessionSecret: "test-secret-key-at-least-32-chars",
-	}
-
-	dbInst, err := database.New(fx.Lifecycle(nil), database.Params{
-		Logger: loggerInst,
-		Config: cfg,
-	})
-	require.NoError(t, err)
-
-	svc, err := app.New(fx.Lifecycle(nil), app.ServiceParams{
-		Logger:   loggerInst,
-		Database: dbInst,
-	})
-	require.NoError(t, err)
-
-	return &backupTestContext{svc: svc, db: dbInst}
-}
-
-// createAppWithFullConfig creates an app with env vars, labels, volumes, and ports.
-func createAppWithFullConfig(
-	t *testing.T,
-	btc *backupTestContext,
-	name string,
-) *models.App {
-	t.Helper()
-
-	createdApp, err := btc.svc.CreateApp(context.Background(), app.CreateAppInput{
-		Name:          name,
-		RepoURL:       "git@example.com:user/" + name + ".git",
-		Branch:        "develop",
-		NtfyTopic:     "https://ntfy.sh/" + name,
-		DockerNetwork: "test-network",
-	})
-	require.NoError(t, err)
-
-	require.NoError(t, btc.svc.AddEnvVar(
-		context.Background(), createdApp.ID, "DB_HOST", "localhost",
-	))
-	require.NoError(t, btc.svc.AddEnvVar(
-		context.Background(), createdApp.ID, "DB_PORT", "5432",
-	))
-	require.NoError(t, btc.svc.AddLabel(
-		context.Background(), createdApp.ID, "traefik.enable", "true",
-	))
-	require.NoError(t, btc.svc.AddVolume(
-		context.Background(), createdApp.ID, "/data", "/app/data", false,
-	))
-
-	port := models.NewPort(btc.db)
-	port.AppID = createdApp.ID
-	port.HostPort = 9090
-	port.ContainerPort = 8080
-	port.Protocol = models.PortProtocolTCP
-	require.NoError(t, port.Save(context.Background()))
-
-	return createdApp
-}
-
-// createAppWithConfigPort creates an app like createAppWithFullConfig but with
-// a custom host port to avoid UNIQUE constraint collisions.
-func createAppWithConfigPort(
-	t *testing.T,
-	btc *backupTestContext,
-	name string,
-	hostPort int,
-) *models.App {
-	t.Helper()
-
-	createdApp, err := btc.svc.CreateApp(context.Background(), app.CreateAppInput{
-		Name:          name,
-		RepoURL:       "git@example.com:user/" + name + ".git",
-		Branch:        "develop",
-		NtfyTopic:     "https://ntfy.sh/" + name,
-		DockerNetwork: "test-network",
-	})
-	require.NoError(t, err)
-
-	require.NoError(t, btc.svc.AddEnvVar(
-		context.Background(), createdApp.ID, "DB_HOST", "localhost",
-	))
-	require.NoError(t, btc.svc.AddLabel(
-		context.Background(), createdApp.ID, "traefik.enable", "true",
-	))
-	require.NoError(t, btc.svc.AddVolume(
-		context.Background(), createdApp.ID, "/data2", "/app/data2", false,
-	))
-
-	port := models.NewPort(btc.db)
-	port.AppID = createdApp.ID
-	port.HostPort = hostPort
-	port.ContainerPort = 8080
-	port.Protocol = models.PortProtocolTCP
-	require.NoError(t, port.Save(context.Background()))
-
-	return createdApp
-}
-
-func TestExportApp(t *testing.T) {
-	t.Parallel()
-
-	btc := setupBackupTest(t)
-	createdApp := createAppWithFullConfig(t, btc, "export-svc-test")
-
-	bundle, err := btc.svc.ExportApp(context.Background(), createdApp)
-	require.NoError(t, err)
-
-	assert.Equal(t, 1, bundle.Version)
-	assert.NotEmpty(t, bundle.ExportedAt)
-	require.Len(t, bundle.Apps, 1)
-
-	ab := bundle.Apps[0]
-	assert.Equal(t, "export-svc-test", ab.Name)
-	assert.Equal(t, "develop", ab.Branch)
-	assert.Equal(t, "test-network", ab.DockerNetwork)
-	assert.Equal(t, "https://ntfy.sh/export-svc-test", ab.NtfyTopic)
-	assert.Len(t, ab.EnvVars, 2)
-	assert.Len(t, ab.Labels, 1)
-	assert.Len(t, ab.Volumes, 1)
-	assert.Len(t, ab.Ports, 1)
-	assert.Equal(t, 9090, ab.Ports[0].HostPort)
-	assert.Equal(t, 8080, ab.Ports[0].ContainerPort)
-	assert.Equal(t, "tcp", ab.Ports[0].Protocol)
-}
-
-func TestExportAllApps(t *testing.T) {
-	t.Parallel()
-
-	btc := setupBackupTest(t)
-	createAppWithFullConfig(t, btc, "export-all-1")
-	createAppWithConfigPort(t, btc, "export-all-2", 9091)
-
-	bundle, err := btc.svc.ExportAllApps(context.Background())
-	require.NoError(t, err)
-
-	assert.Equal(t, 1, bundle.Version)
-	assert.Len(t, bundle.Apps, 2)
-}
-
-func TestExportAllAppsEmpty(t *testing.T) {
-	t.Parallel()
-
-	btc := setupBackupTest(t)
-
-	bundle, err := btc.svc.ExportAllApps(context.Background())
-	require.NoError(t, err)
-
-	assert.Empty(t, bundle.Apps)
-}
-
-func TestImportApps(t *testing.T) {
-	t.Parallel()
-
-	btc := setupBackupTest(t)
-
-	bundle := &app.BackupBundle{
-		Version:    1,
-		ExportedAt: "2025-01-01T00:00:00Z",
-		Apps: []app.Backup{
-			{
-				Name:           "imported-test",
-				RepoURL:        "git@example.com:user/imported.git",
-				Branch:         "main",
-				DockerfilePath: "Dockerfile",
-				DockerNetwork:  "my-network",
-				EnvVars: []app.BackupEnvVar{
-					{Key: "FOO", Value: "bar"},
-				},
-				Labels: []app.BackupLabel{
-					{Key: "app", Value: "test"},
-				},
-				Volumes: []app.BackupVolume{
-					{HostPath: "/host", ContainerPath: "/container", ReadOnly: true},
-				},
-				Ports: []app.BackupPort{
-					{HostPort: 3000, ContainerPort: 8080, Protocol: "tcp"},
-				},
-			},
-		},
-	}
-
-	imported, skipped, err := btc.svc.ImportApps(context.Background(), bundle)
-	require.NoError(t, err)
-
-	assert.Equal(t, []string{"imported-test"}, imported)
-	assert.Empty(t, skipped)
-
-	// Verify the app was created
-	apps, _ := btc.svc.ListApps(context.Background())
-	require.Len(t, apps, 1)
-	assert.Equal(t, "imported-test", apps[0].Name)
-	assert.True(t, apps[0].DockerNetwork.Valid)
-	assert.Equal(t, "my-network", apps[0].DockerNetwork.String)
-
-	// Has fresh secrets
-	assert.NotEmpty(t, apps[0].WebhookSecret)
-	assert.NotEmpty(t, apps[0].SSHPublicKey)
-
-	// Verify sub-resources
-	envVars, _ := apps[0].GetEnvVars(context.Background())
-	assert.Len(t, envVars, 1)
-
-	labels, _ := apps[0].GetLabels(context.Background())
-	assert.Len(t, labels, 1)
-
-	volumes, _ := apps[0].GetVolumes(context.Background())
-	assert.Len(t, volumes, 1)
-	assert.True(t, volumes[0].ReadOnly)
-
-	ports, _ := apps[0].GetPorts(context.Background())
-	assert.Len(t, ports, 1)
-	assert.Equal(t, 3000, ports[0].HostPort)
-}
-
-func TestImportAppsSkipsDuplicates(t *testing.T) {
-	t.Parallel()
-
-	btc := setupBackupTest(t)
-
-	// Create existing app
-	_, err := btc.svc.CreateApp(context.Background(), app.CreateAppInput{
-		Name:    "existing",
-		RepoURL: "git@example.com:user/existing.git",
-	})
-	require.NoError(t, err)
-
-	bundle := &app.BackupBundle{
-		Version:    1,
-		ExportedAt: "2025-01-01T00:00:00Z",
-		Apps: []app.Backup{
-			{
-				Name:           "existing",
-				RepoURL:        "git@example.com:user/existing.git",
-				Branch:         "main",
-				DockerfilePath: "Dockerfile",
-				EnvVars:        []app.BackupEnvVar{},
-				Labels:         []app.BackupLabel{},
-				Volumes:        []app.BackupVolume{},
-				Ports:          []app.BackupPort{},
-			},
-			{
-				Name:           "brand-new",
-				RepoURL:        "git@example.com:user/new.git",
-				Branch:         "main",
-				DockerfilePath: "Dockerfile",
-				EnvVars:        []app.BackupEnvVar{},
-				Labels:         []app.BackupLabel{},
-				Volumes:        []app.BackupVolume{},
-				Ports:          []app.BackupPort{},
-			},
-		},
-	}
-
-	imported, skipped, err := btc.svc.ImportApps(context.Background(), bundle)
-	require.NoError(t, err)
-
-	assert.Equal(t, []string{"brand-new"}, imported)
-	assert.Equal(t, []string{"existing"}, skipped)
-}
-
-func TestImportAppsPortDefaultProtocol(t *testing.T) {
-	t.Parallel()
-
-	btc := setupBackupTest(t)
-
-	bundle := &app.BackupBundle{
-		Version:    1,
-		ExportedAt: "2025-01-01T00:00:00Z",
-		Apps: []app.Backup{
-			{
-				Name:           "port-default-test",
-				RepoURL:        "git@example.com:user/repo.git",
-				Branch:         "main",
-				DockerfilePath: "Dockerfile",
-				EnvVars:        []app.BackupEnvVar{},
-				Labels:         []app.BackupLabel{},
-				Volumes:        []app.BackupVolume{},
-				Ports: []app.BackupPort{
-					{HostPort: 80, ContainerPort: 80, Protocol: ""},
-				},
-			},
-		},
-	}
-
-	imported, _, err := btc.svc.ImportApps(context.Background(), bundle)
-	require.NoError(t, err)
-	assert.Len(t, imported, 1)
-
-	apps, _ := btc.svc.ListApps(context.Background())
-	ports, _ := apps[0].GetPorts(context.Background())
-	require.Len(t, ports, 1)
-	assert.Equal(t, models.PortProtocolTCP, ports[0].Protocol)
-}
-
-func TestExportImportRoundTripService(t *testing.T) {
-	t.Parallel()
-
-	btc := setupBackupTest(t)
-	createAppWithFullConfig(t, btc, "roundtrip-svc")
-
-	// Export
-	bundle, err := btc.svc.ExportAllApps(context.Background())
-	require.NoError(t, err)
-	require.Len(t, bundle.Apps, 1)
-
-	// Delete original
-	apps, _ := btc.svc.ListApps(context.Background())
-	for _, a := range apps {
-		require.NoError(t, btc.svc.DeleteApp(context.Background(), a))
-	}
-
-	// Import
-	imported, skipped, err := btc.svc.ImportApps(context.Background(), bundle)
-	require.NoError(t, err)
-	assert.Len(t, imported, 1)
-	assert.Empty(t, skipped)
-
-	// Verify round-trip fidelity
-	restored, _ := btc.svc.ListApps(context.Background())
-	require.Len(t, restored, 1)
-	assert.Equal(t, "roundtrip-svc", restored[0].Name)
-	assert.Equal(t, "develop", restored[0].Branch)
-	assert.Equal(t, "test-network", restored[0].DockerNetwork.String)
-
-	envVars, _ := restored[0].GetEnvVars(context.Background())
-	assert.Len(t, envVars, 2)
-
-	labels, _ := restored[0].GetLabels(context.Background())
-	assert.Len(t, labels, 1)
-
-	volumes, _ := restored[0].GetVolumes(context.Background())
-	assert.Len(t, volumes, 1)
-
-	ports, _ := restored[0].GetPorts(context.Background())
-	assert.Len(t, ports, 1)
-}

internal/service/deploy/deploy.go

@@ -1094,14 +1094,28 @@ func (svc *Service) buildContainerOptions(
 		network = app.DockerNetwork.String
 	}
 
+	var cpuLimit float64
+
+	if app.CPULimit.Valid {
+		cpuLimit = app.CPULimit.Float64
+	}
+
+	var memoryLimit int64
+
+	if app.MemoryLimit.Valid {
+		memoryLimit = app.MemoryLimit.Int64
+	}
+
 	return docker.CreateContainerOptions{
-		Name:    "upaas-" + app.Name,
-		Image:   imageID.String(),
-		Env:     envMap,
-		Labels:  buildLabelMap(app, labels),
-		Volumes: buildVolumeMounts(volumes),
-		Ports:   buildPortMappings(ports),
-		Network: network,
+		Name:        "upaas-" + app.Name,
+		Image:       imageID.String(),
+		Env:         envMap,
+		Labels:      buildLabelMap(app, labels),
+		Volumes:     buildVolumeMounts(volumes),
+		Ports:       buildPortMappings(ports),
+		Network:     network,
+		CPULimit:    cpuLimit,
+		MemoryLimit: memoryLimit,
 	}, nil
 }
 

internal/service/deploy/deploy_container_test.go

@@ -2,6 +2,7 @@ package deploy_test
 
 import (
 	"context"
+	"database/sql"
 	"log/slog"
 	"os"
 	"testing"
@@ -43,3 +44,93 @@ func TestBuildContainerOptionsUsesImageID(t *testing.T) {
 		t.Errorf("expected Name=%q, got %q", "upaas-myapp", opts.Name)
 	}
 }
+
+func TestBuildContainerOptionsNoResourceLimits(t *testing.T) {
+	t.Parallel()
+
+	db := database.NewTestDatabase(t)
+
+	app := models.NewApp(db)
+	app.Name = "nolimits"
+
+	err := app.Save(context.Background())
+	if err != nil {
+		t.Fatalf("failed to save app: %v", err)
+	}
+
+	log := slog.New(slog.NewTextHandler(os.Stderr, nil))
+	svc := deploy.NewTestService(log)
+
+	opts, err := svc.BuildContainerOptionsExported(
+		context.Background(), app, docker.ImageID("test:latest"),
+	)
+	if err != nil {
+		t.Fatalf("buildContainerOptions returned error: %v", err)
+	}
+
+	if opts.CPULimit != 0 {
+		t.Errorf("expected CPULimit=0, got %v", opts.CPULimit)
+	}
+
+	if opts.MemoryLimit != 0 {
+		t.Errorf("expected MemoryLimit=0, got %v", opts.MemoryLimit)
+	}
+}
+
+func TestBuildContainerOptionsCPULimit(t *testing.T) {
+	t.Parallel()
+
+	db := database.NewTestDatabase(t)
+
+	app := models.NewApp(db)
+	app.Name = "cpulimit"
+	app.CPULimit = sql.NullFloat64{Float64: 0.5, Valid: true}
+
+	err := app.Save(context.Background())
+	if err != nil {
+		t.Fatalf("failed to save app: %v", err)
+	}
+
+	log := slog.New(slog.NewTextHandler(os.Stderr, nil))
+	svc := deploy.NewTestService(log)
+
+	opts, err := svc.BuildContainerOptionsExported(
+		context.Background(), app, docker.ImageID("test:latest"),
+	)
+	if err != nil {
+		t.Fatalf("buildContainerOptions returned error: %v", err)
+	}
+
+	if opts.CPULimit != 0.5 {
+		t.Errorf("expected CPULimit=0.5, got %v", opts.CPULimit)
+	}
+}
+
+func TestBuildContainerOptionsMemoryLimit(t *testing.T) {
+	t.Parallel()
+
+	db := database.NewTestDatabase(t)
+
+	app := models.NewApp(db)
+	app.Name = "memlimit"
+	app.MemoryLimit = sql.NullInt64{Int64: 536870912, Valid: true} // 512m
+
+	err := app.Save(context.Background())
+	if err != nil {
+		t.Fatalf("failed to save app: %v", err)
+	}
+
+	log := slog.New(slog.NewTextHandler(os.Stderr, nil))
+	svc := deploy.NewTestService(log)
+
+	opts, err := svc.BuildContainerOptionsExported(
+		context.Background(), app, docker.ImageID("test:latest"),
+	)
+	if err != nil {
+		t.Fatalf("buildContainerOptions returned error: %v", err)
+	}
+
+	if opts.MemoryLimit != 536870912 {
+		t.Errorf("expected MemoryLimit=536870912, got %v", opts.MemoryLimit)
+	}
+}

templates/app_detail.html

@@ -432,18 +432,6 @@
         </div>
     </div>
 
-    <!-- Backup -->
-    <div class="card p-6 mb-6">
-        <h2 class="section-title mb-4">Backup</h2>
-        <p class="text-sm text-gray-500 mb-3">Export this app's configuration (settings, env vars, labels, volumes, ports) as a JSON file for backup or migration.</p>
-        <a href="/apps/{{.App.ID}}/export" class="btn-secondary">
-            <svg class="w-4 h-4 mr-1 inline" fill="none" stroke="currentColor" viewBox="0 0 24 24">
-                <path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M4 16v1a3 3 0 003 3h10a3 3 0 003-3v-1m-4-4l-4 4m0 0l-4-4m4 4V4"/>
-            </svg>
-            Export Config
-        </a>
-    </div>
-
     <!-- Danger Zone -->
     <div class="card border-2 border-error-500/20 bg-error-50/50 p-6">
         <h2 class="text-lg font-medium text-error-700 mb-4">Danger Zone</h2>

templates/app_edit.html

@@ -114,6 +114,38 @@
                 >
             </div>
 
+            <hr class="border-gray-200">
+
+            <h3 class="text-lg font-medium text-gray-900">Resource Limits</h3>
+
+            <div class="grid grid-cols-2 gap-4">
+                <div class="form-group">
+                    <label for="cpu_limit" class="label">CPU Limit (cores)</label>
+                    <input
+                        type="text"
+                        id="cpu_limit"
+                        name="cpu_limit"
+                        value="{{if .App.CPULimit.Valid}}{{.App.CPULimit.Float64}}{{end}}"
+                        class="input"
+                        placeholder="e.g. 0.5, 1, 2"
+                    >
+                    <p class="text-sm text-gray-500 mt-1">Number of CPU cores (e.g. 0.5 = half a core)</p>
+                </div>
+
+                <div class="form-group">
+                    <label for="memory_limit" class="label">Memory Limit</label>
+                    <input
+                        type="text"
+                        id="memory_limit"
+                        name="memory_limit"
+                        value="{{if .App.MemoryLimit.Valid}}{{formatMemoryBytes .App.MemoryLimit.Int64}}{{end}}"
+                        class="input"
+                        placeholder="e.g. 256m, 1g"
+                    >
+                    <p class="text-sm text-gray-500 mt-1">Memory with unit suffix (k, m, g) or plain bytes</p>
+                </div>
+            </div>
+
             <div class="flex justify-end gap-3 pt-4">
                 <a href="/apps/{{.App.ID}}" class="btn-secondary">Cancel</a>
                 <button type="submit" class="btn-primary">Save Changes</button>

templates/backup_import.html

@@ -1,62 +0,0 @@
-{{template "base" .}}
-
-{{define "title"}}Import Backup - µPaaS{{end}}
-
-{{define "content"}}
-{{template "nav" .}}
-
-<main class="max-w-4xl mx-auto px-4 py-8">
-    <div class="mb-6">
-        <a href="/" class="text-primary-600 hover:text-primary-800 inline-flex items-center">
-            <svg class="w-4 h-4 mr-1" fill="none" stroke="currentColor" viewBox="0 0 24 24">
-                <path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M15 19l-7-7 7-7"/>
-            </svg>
-            Back to Dashboard
-        </a>
-    </div>
-
-    {{template "alert-success" .}}
-    {{template "alert-error" .}}
-
-    <h1 class="text-2xl font-medium text-gray-900 mb-6">Import Backup</h1>
-
-    <div class="card p-6 mb-6">
-        <h2 class="section-title mb-4">Restore from Backup File</h2>
-        <p class="text-sm text-gray-500 mb-4">
-            Upload a previously exported µPaaS backup file (JSON) to restore app configurations.
-            New apps will be created with fresh SSH keys and webhook secrets.
-            Apps whose names already exist will be skipped.
-        </p>
-        <form method="POST" action="/backup/import" enctype="multipart/form-data">
-            {{ .CSRFField }}
-            <div class="mb-4">
-                <label for="backup_file" class="form-label">Backup File</label>
-                <input type="file" id="backup_file" name="backup_file" accept=".json,application/json"
-                    class="block w-full text-sm text-gray-500
-                    file:mr-4 file:py-2 file:px-4
-                    file:rounded file:border-0
-                    file:text-sm file:font-medium
-                    file:bg-primary-50 file:text-primary-700
-                    hover:file:bg-primary-100
-                    cursor-pointer">
-            </div>
-            <button type="submit" class="btn-primary">Import</button>
-        </form>
-    </div>
-
-    <div class="card p-6">
-        <h2 class="section-title mb-4">Export All Apps</h2>
-        <p class="text-sm text-gray-500 mb-4">
-            Download a backup of all app configurations. This includes app settings,
-            environment variables, labels, volumes, and port mappings.
-            Secrets (SSH keys, webhook tokens) are not included — they are regenerated on import.
-        </p>
-        <a href="/backup/export" class="btn-secondary">
-            <svg class="w-4 h-4 mr-1 inline" fill="none" stroke="currentColor" viewBox="0 0 24 24">
-                <path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M4 16v1a3 3 0 003 3h10a3 3 0 003-3v-1m-4-4l-4 4m0 0l-4-4m4 4V4"/>
-            </svg>
-            Export All Apps
-        </a>
-    </div>
-</main>
-{{end}}

templates/dashboard.html

@@ -11,20 +11,12 @@
 
     <div class="section-header">
         <h1 class="text-2xl font-medium text-gray-900">Applications</h1>
-        <div class="flex gap-3">
-            <a href="/backup/import" class="btn-secondary">
-                <svg class="w-4 h-4 mr-1 inline" fill="none" stroke="currentColor" viewBox="0 0 24 24">
-                    <path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M4 16v1a3 3 0 003 3h10a3 3 0 003-3v-1m-4-8l-4-4m0 0L8 8m4-4v12"/>
-                </svg>
-                Backup / Restore
-            </a>
-            <a href="/apps/new" class="btn-primary">
-                <svg class="w-5 h-5 mr-1" fill="none" stroke="currentColor" viewBox="0 0 24 24">
-                    <path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M12 4v16m8-8H4"/>
-                </svg>
-                New App
-            </a>
-        </div>
+        <a href="/apps/new" class="btn-primary">
+            <svg class="w-5 h-5 mr-1" fill="none" stroke="currentColor" viewBox="0 0 24 24">
+                <path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M12 4v16m8-8H4"/>
+            </svg>
+            New App
+        </a>
     </div>
 
     {{if .AppStats}}

templates/templates.go

@@ -6,6 +6,7 @@ import (
 	"fmt"
 	"html/template"
 	"io"
+	"strconv"
 	"sync"
 )
 
@@ -23,6 +24,34 @@ var (
 	templatesMutex sync.RWMutex
 )
 
+// templateFuncs returns the custom template function map.
+func templateFuncs() template.FuncMap {
+	return template.FuncMap{
+		"formatMemoryBytes": formatMemoryBytes,
+	}
+}
+
+// Memory unit constants.
+const (
+	memGigabyte = 1024 * 1024 * 1024
+	memMegabyte = 1024 * 1024
+	memKilobyte = 1024
+)
+
+// formatMemoryBytes formats bytes into a human-readable string with unit suffix.
+func formatMemoryBytes(bytes int64) string {
+	switch {
+	case bytes >= memGigabyte && bytes%memGigabyte == 0:
+		return strconv.FormatInt(bytes/memGigabyte, 10) + "g"
+	case bytes >= memMegabyte && bytes%memMegabyte == 0:
+		return strconv.FormatInt(bytes/memMegabyte, 10) + "m"
+	case bytes >= memKilobyte && bytes%memKilobyte == 0:
+		return strconv.FormatInt(bytes/memKilobyte, 10) + "k"
+	default:
+		return strconv.FormatInt(bytes, 10)
+	}
+}
+
 // initTemplates parses base template and creates cloned templates for each page.
 func initTemplates() {
 	templatesMutex.Lock()
@@ -32,8 +61,10 @@ func initTemplates() {
 		return
 	}
 
-	// Parse base template with shared components
-	baseTemplate = template.Must(template.ParseFS(templatesRaw, "base.html"))
+	// Parse base template with shared components and custom functions
+	baseTemplate = template.Must(
+		template.New("base.html").Funcs(templateFuncs()).ParseFS(templatesRaw, "base.html"),
+	)
 
 	// Pages that extend base
 	pages := []string{
@@ -45,7 +76,6 @@ func initTemplates() {
 		"app_edit.html",
 		"deployments.html",
 		"webhook_events.html",
-		"backup_import.html",
 	}
 
 	pageTemplates = make(map[string]*template.Template)

templates/templates_test.go

@@ -0,0 +1,34 @@
+package templates //nolint:testpackage // tests unexported formatMemoryBytes
+
+import (
+	"testing"
+)
+
+func TestFormatMemoryBytes(t *testing.T) {
+	t.Parallel()
+
+	tests := []struct {
+		name     string
+		bytes    int64
+		expected string
+	}{
+		{"gigabytes", 1024 * 1024 * 1024, "1g"},
+		{"two gigabytes", 2 * 1024 * 1024 * 1024, "2g"},
+		{"megabytes", 256 * 1024 * 1024, "256m"},
+		{"kilobytes", 512 * 1024, "512k"},
+		{"plain bytes", 12345, "12345"},
+		{"non-even megabytes", 256*1024*1024 + 1, "268435457"},
+		{"zero", 0, "0"},
+	}
+
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			t.Parallel()
+
+			got := formatMemoryBytes(tt.bytes)
+			if got != tt.expected {
+				t.Errorf("formatMemoryBytes(%d) = %q, want %q", tt.bytes, got, tt.expected)
+			}
+		})
+	}
+}