sneak/routewatch
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Serve the /api/v1/stats prefix distribution from memory (closes #30) 
The prefix distribution was the last query on the stats path. It read one
index entry per live route on every request, so on a large database it took
the whole 4-second deadline and /api/v1/stats answered 500.

The distribution now lives next to the in-memory counts: seeded once at
startup from the same query, then kept exact by every live-route write. A new
route whose prefix had no live route adds one at its mask length; a delete
that leaves a prefix with no live route takes one away. Each check is one
lookup on the prefix index, made only for new and removed routes, within the
same write. The single-route delete now runs its delete and that lookup in one
transaction, so a failed lookup cannot leave the counts off.

Model: opus-5-5
2026-10-03 16:01:32 +00:00

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Workflow

  • branch (from main)
  • do the work in Next Step
  • move Next Step to the top of Completed Steps
  • move the top item of Future Steps into Next Step
  • commit (TODO.md changes in the same commit as the work)
  • merge to main if the branch is not protected, otherwise open a PR
  • push

Status

pre-1.0. No git tags. The Docker build runs the format check, the linter and the tests, and the Gitea workflow runs that build on every push. The image sets memory ceilings for a 5 GiB container (README "Memory") and the README says how to run it under upaas (README "Running under upaas"). A 35-hour run of 3898daa on the live feed peaked at about 1 GiB, without a container memory limit.

Next Step

next waits for sneak to merge it to main through #6. After that, setting routewatch up under upaas on fsn1app1 and deploying it are his (#31), and so is the run under a real 5 GiB limit (#3).

Completed Steps

  • 2026-10-03: /api/v1/stats serves the prefix distribution from memory, seeded at startup and adjusted on every live-route write, so a request no longer reads every live route (closes #30)
  • 2026-10-03: a new database is created with auto_vacuum set to incremental, through the connection string so it is set before the file is first written, and each periodic incremental vacuum now returns up to 1000 free pages; the late PRAGMA auto_vacuum in Initialize, which SQLite ignored, is gone (closes #43)
  • 2026-10-03: looking up an IP address no longer reads every IPv6 route: both families find the most specific live route with at most 33 or 129 lookups on the prefix index, and the IPv4 range columns are gone. Prefixes from the feed are stored in one text form, so an IPv6 withdrawal, which the feed sends uncompressed, now removes its route (closes #48)
  • 2026-10-02: a plain docker build . stamps the commit's tag or short commit (git describe --tags --always) into the page footer instead of unknown: .dockerignore sends .git without .git/config, a VERSION build argument takes precedence, and make build stamps the same value (closes #46)
  • 2026-09-29: the entrypoint creates the data directory if it is missing and stops the start if a step fails; README "Running under upaas" no longer asks for the host directory to be created first (closes #42)
  • 2026-09-29: .dockerignore keeps .git, local build output, local databases and .env out of the Docker build context, and so out of the source archive in the image (closes #39)
  • 2026-09-29: README first line names the MIT license and the author; the License section now says MIT and links LICENSE, and an Author section was added; this file brought up to date (closes #38)
  • 2026-09-29: MIT LICENSE (closes #1)
  • 2026-09-28: stopping the daemon while the feed is flowing no longer panics with "send on closed channel": the read loop checks for a stop just before handing a message to the handler queues, and a second Stop no longer closes the queues again (closes #34)
  • 2026-09-28: docker stop no longer kills the daemon 2 seconds after the stop signal: the entrypoint switches to the routewatch user with setpriv instead of runuser, so the daemon receives the signal itself and gets the whole wait docker stop allows, up to its own 60-second limit (closes #33)
  • 2026-09-28: ready to run under upaas: a set but invalid PORT, XDG_DATA_HOME or MALLOC_ARENA_MAX stops the start, the health check follows PORT, README "Running under upaas" section (closes #31)
  • 2026-09-22: realtime in-memory database statistics: counts seeded at startup and adjusted on every write, oldest/newest route timestamps via index-end lookups; /api/v1/stats no longer scans the tables (closes #27)
  • 2026-09-21: batch writes take the write lock when their transaction begins (_txlock=immediate), so they wait out a WAL checkpoint instead of failing with "database is locked" (closes #25)
  • 2026-09-21: MALLOC_ARENA_MAX=2 in the image caps glibc malloc arenas, so memory outside the Go runtime no longer grows with the core count (closes #23)
  • 2026-09-21: GOMEMLIMIT=1536MiB in the image; README Memory section with the memory budget and the 5 GiB container limit (closes #13)
  • 2026-09-21: the four handler queues hold at most 20,000 messages each, down from 100,000 (closes #11)
  • 2026-09-21: two goroutine leaks fixed: the stats handlers after a timeout and the streamer's tickers on every reconnect (closes #12)
  • 2026-09-21: parsed RIS messages no longer keep the unused Community and Raw fields (closes #9)
  • 2026-09-21: .editorconfig, and a Gitea workflow that runs script/cibuild on every push (closes #14)
  • 2026-09-21: the peering handler's AS-path map holds at most 500,000 paths and is swapped for an empty one every 30 seconds instead of copied (closes #10)
  • 2026-09-21: SQLite memory bounded across the whole connection pool: a 64 MiB page cache on each connection, 1 GiB soft and 1.5 GiB hard heap limits (closes #8)
  • 2026-09-21: the Docker build runs the format check, the linter and the tests, linting in a separate stage on a golangci-lint image pinned by digest (closes #5)
  • 2026-09-21: make test skips the live-network feed test (-short), so make check no longer depends on the network (closes #2)
  • 2026-07-07 Adopted scripts-to-rule-them-all: script/ entrypoints, Makefile shims, README Entrypoints section
  • 2026-02-22: repo policy compliance: required policy files, .gitignore update, Makefile fmt-check/check/docker/hooks targets, gofmt pass (repo-policies-compliance, unmerged)
  • 2026-01-01: WAL checkpointing: periodic (5s), on startup with logging, TRUNCATE mode; fixed slow queries
  • 2025-12-31: status page: navbar, home page with search, oldest/newest route timestamps, NULL handling in WHOIS stats; container runs as routewatch user with proper state dir
  • 2025-12-30: structured HTTP request logging, increased timeouts, CIDR prefix URL routing fixes, status page metrics and footer
  • 2025-12-29: Dockerfile multi-stage build with source archive; SQLite incremental vacuum for non-blocking space reclamation
  • 2025-07-27: initial RouteWatch BGP stream monitor

Future Steps

  • Production memory under 5 GiB: whether to test under a real 5 GiB container limit on fsn1app1 is open for sneak (#3)
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