116 lines
2.7 KiB
Go
116 lines
2.7 KiB
Go
package process
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import (
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"encoding/json"
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"fmt"
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"net/http"
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"runtime"
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"strings"
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"time"
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"github.com/gin-gonic/gin"
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)
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type hash map[string]interface{}
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func (a *Server) instances() []hash {
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resp := make([]hash, 0)
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now := time.Now()
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for _, v := range a.feta.manager.ListInstances() {
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i := make(hash)
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// FIXME figure out why a very short lock here deadlocks
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v.Lock()
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i["hostname"] = v.Hostname
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i["nextCheck"] = v.NextFetch.UTC().Format(time.RFC3339)
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i["nextCheckAfter"] = (-1 * now.Sub(v.NextFetch)).String()
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i["successCount"] = v.SuccessCount
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i["errorCount"] = v.ErrorCount
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i["identified"] = v.Identified
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i["status"] = v.Status()
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i["software"] = "unknown"
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i["version"] = "unknown"
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if v.Identified {
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i["software"] = v.ServerImplementationString
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i["version"] = v.ServerVersionString
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}
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v.Unlock()
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resp = append(resp, i)
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}
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return resp
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}
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func (a *Server) instanceSummary() map[string]int {
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resp := make(map[string]int)
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for _, v := range a.feta.manager.ListInstances() {
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v.Lock()
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resp[fmt.Sprintf("STATUS_%s", v.Status())]++
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if v.ServerImplementationString != "" {
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//FIXME(sneak) sanitize this to a-z0-9, it is server-provided
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resp[fmt.Sprintf("SOFTWARE_%s", strings.ToUpper(v.ServerImplementationString))]++
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}
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v.Unlock()
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}
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return resp
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}
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func (a *Server) getInstanceListHandler() http.HandlerFunc {
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return func(w http.ResponseWriter, r *http.Request) {
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result := &gin.H{
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"instances": a.instances(),
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}
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json, err := json.Marshal(result)
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if err != nil {
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http.Error(w, err.Error(), http.StatusInternalServerError)
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return
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}
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w.Header().Set("Content-Type", "application/json")
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w.Write(json)
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}
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}
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func (a *Server) getIndexHandler() http.HandlerFunc {
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return func(w http.ResponseWriter, r *http.Request) {
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index := &gin.H{
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"server": &gin.H{
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"now": time.Now().UTC().Format(time.RFC3339),
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"uptime": a.feta.uptime().String(),
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"goroutines": runtime.NumGoroutine(),
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"goversion": runtime.Version(),
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"version": a.feta.version,
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"buildarch": a.feta.buildarch,
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},
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"instanceSummary": a.instanceSummary(),
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}
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json, err := json.Marshal(index)
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if err != nil {
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http.Error(w, err.Error(), http.StatusInternalServerError)
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return
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}
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w.Header().Set("Content-Type", "application/json")
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w.Write(json)
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}
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}
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func (a *Server) getHealthCheckHandler() http.HandlerFunc {
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return func(w http.ResponseWriter, r *http.Request) {
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resp := &gin.H{
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"status": "ok",
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"now": time.Now().UTC().Format(time.RFC3339),
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"uptime": a.feta.uptime().String(),
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}
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json, err := json.Marshal(resp)
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if err != nil {
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http.Error(w, err.Error(), http.StatusInternalServerError)
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return
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}
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w.Header().Set("Content-Type", "application/json")
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w.Write(json)
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}
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}
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