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bingo: add a reachability monitor for the status page
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datacenterbingo gets a public page showing whether each datacenter's
network answers. The probing lives here, next to the schema and the
admin, since the public site only has a read-only role.

bin/monitor runs as a second container from the same image. Once a
minute it opens one TCP connection to every active target (a handshake
or a refusal both count as answered) and folds the results into
5-minute rows per datacenter, plus a per-bucket row for control hosts in
Russia, so a lost vantage point isn't mistaken for dark sites. Rows are
kept 30 days. Targets are managed at /admin/bingo/monitor; only hosts a
public source ties to that one site belong there.

Migration 017 also grants the new tables to the bingo role, so the
public site can read them without a storage redeploy.

Assisted-by: Claude:opus-5-5
This commit is contained in:
Sergei Poljanski 2026-10-18 10:31:00 +04:00
commit 0cc3e1dece
Signed by: asxpi
GPG key ID: 4F8851660FA4121B
10 changed files with 415 additions and 1 deletions
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CLAUDE.md
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@ -139,6 +139,7 @@ The public site (datacenterbingo.xyz) lives in its own repo and container: `git.
- Served publicly by the bingo site at `/p/:file`; previewed here at `/admin/bingo/p/:file`.
- IndexNow (`Bingo::IndexNow`): admin actions ping api.indexnow.org with the changed URLs. The key comes from `INDEXNOW` → `INDEXNOW_KEY`; the bingo site has the same key and serves `/<key>.txt`. Unset = no-op.
- Photos are third-party (operator sites, Habr, Wikimedia Commons CC BY-SA) — keep `photo_credit` filled; renders/illustrations are marked as such.
- Monitor (`lib/bingo_monitor.rb`, `bin/monitor`, migration 017): the `asxpio-monitor` container (same image, compose healthcheck on a heartbeat file) opens one TCP connection per minute to each active `bingo_monitor_targets` row; a handshake or a refusal counts as answered. Results fold into 5-minute `bingo_monitor_samples` per datacenter (upserts) and `bingo_monitor_buckets` (rounds + control hosts, i.e. targets with `datacenter_id` NULL); kept 30 days. Targets are managed at `/admin/bingo/monitor` (bulk lines `slug host[:port] source_url label`, slug `_control` for controls). Only add hosts a public source ties to that one site. The public status page in datacenterbingo reads these tables; migration 017 grants them to the `bingo` role.
- No street addresses or coordinates on the page — city level only.
## Operational notes