personal_infra/ansible/roles/bitcoin_knots/templates/healthcheck.service.j2

[Unit]
Description=Bitcoin Knots Health Check
After=network.target bitcoind.service

[Service]
Type=oneshot
User=root
ExecStart=/usr/local/bin/bitcoin-knots-healthcheck-push.sh
Environment=HEALTHCHECK_PUSH_URL={{ healthcheck_push_url }}
Environment=HEALTHCHECK_PUSH_TOKEN={{ healthcheck_push_token }}
StandardOutput=journal
StandardError=journal

[Install]
WantedBy=multi-user.target
bitcoin-knots: convert to a role, de-Uptime-Kuma the health check 892-line playbook becomes 40 lines plus a role with install/build/configure/ service/healthcheck phases, five templates and one handler. bitcoin_knots_vars.yml is deleted; its content is the role's defaults. Verified after a real run: bitcoind still active since 2026-08-19 (NO restart), chain at 966844 blocks / 875 GB, DATUM config intact, dbcache still 200, health check timer firing again. changed=3, all health-check. vipy changed=0. ⚠ THE BIG ONE: the playbook would have deleted the mining integration. bitcoin.conf on the node carries a section that was hand-added and was missing from the template entirely: blockmaxsize=3985000 blockmaxweight=3985000 blocknotify=killall -USR1 datum_gateway maxmempool=1000 blockreconstructionextratxn=1000000 blocknotify is how datum_gateway learns a new block landed. Running the old playbook would have stripped all of it and solo mining would have carried on against a stale template - a silent failure that costs money rather than raising an error. Also dbcache 200 -> 3528 (hand-tuned down; the calculation wants 90% of RAM) and logging moved off the file. All now reconciled, dbcache behind bitcoin_dbcache_mb_override. bitcoin-knots and datum-gateway are ONE SYSTEM. Noted in the README. AND MY OWN FIX MADE IT MORE DANGEROUS. The `Restart bitcoind` handler was guarded by uptime_kuma_enabled, so it had been inert: bitcoin.conf and the systemd unit both notify it and neither could restart anything - a config change applied to disk, reported success, and never took effect. Ungating that is right, but it converts "wrong config sitting inertly on disk" into "node restarted onto a config that breaks mining". The ungating had to land WITH the template reconciliation, not before it. It also raises the bar permanently: any residual template/live difference now restarts a Bitcoin node on every run. Four rounds of --check --diff to reach changed=0 - the DATUM section, an explanatory comment that was rendering into the deployed config (now a {# #} Jinja comment), a "# Pruning (optional)" comment the live file had, and one trailing blank line. The build path is 32 tasks all guarded by `not bitcoind_binary_exists.stat.exists`, so a converged host skips the 30-60 minute compile and both `state: absent` deletions. Those target /opt/bitcoin-knots/{source,bitcoin-<version>}; the chain is in /mnt/knots_data and is never touched. Signature-verification tasks copied verbatim. The health check timer had last fired 2026-08-09 while reporting active/enabled - same OnBootSec + OnUnitActiveSec dead chain as fulcrum. The role runs the check once after enabling to supply the reference the timer schedules from. Ownership parity checked mechanically against `git show HEAD:`, keyed by TASK NAME rather than path - keying by path gave a false positive, because bitcoin_knots_source_dir is created with ownership and later removed with state: absent, so whichever task comes last wins and that differs between one file and five. 13/13 match. bitcoin_p2p_port and the tailscale hostname moved to services_config.yml for the socket-proxy play on the edge host. Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com> 2026-09-13 18:13:40 +02:00			`[Unit]`
			`Description=Bitcoin Knots Health Check`
			`After=network.target bitcoind.service`

			`[Service]`
			`Type=oneshot`
			`User=root`
			`ExecStart=/usr/local/bin/bitcoin-knots-healthcheck-push.sh`
			`Environment=HEALTHCHECK_PUSH_URL={{ healthcheck_push_url }}`
uptime kuma: remove every live reference, repoint the probes to Gatus Nothing in the repo pushes to, authenticates against, or is gated by Uptime Kuma any more. ── The sixth instance of the banner bug ──────────────────────────────────── memos had `Restart memos` guarded by `uptime_kuma_enabled`, because the deprecation banner was placed immediately above it and swept it in. It is a HANDLER, so every memos config change since 2026-09-11 applied to disk and silently never restarted the service. Ungated. That is the same failure found in forgejo-runner's self-assert, phoenixd's timer enable, mempool's three timer enables, fulcrum's restart handler and bitcoind's restart handler. Every guard was read and asked "monitoring or deployment?" before being deleted, which is the only reason this was caught. ── What was removed ──────────────────────────────────────────────────────── 30 uptime_kuma_enabled guards across 7 unconverted service playbooks, and the 29 Kuma monitor-creation tasks they gated (embedded Python that drove the Kuma API, temp credential files, cleanup) 7 dead uptime_kuma_api_url definitions 7 stale DEPRECATED banners uptime_kuma_enabled and subdomains.uptime_kuma from group_vars/all healthcheck_push_urls from the vault - 30 push tokens services/ntfy/setup_ntfy_uptime_kuma_notification.yml -> archive/ The explanatory comments in the six converted roles are KEPT on purpose. They record why a handler is ungated, and deleting the explanation invites someone to helpfully re-add the guard. ── The probes moved rather than died ─────────────────────────────────────── Eight per-service health checks were still pushing to Kuma. They are not superseded by infra/401: that answers "is the unit running", these answer "does the service actually respond" - an RPC call to bitcoind, a TCP connect to Fulcrum's Electrum port, an HTTP fetch from Mempool's backend. A process can be perfectly `active` and useless. So they were repointed, not deleted. Gatus external endpoints take a POST with a bearer token and success=true\|false where Kuma took a GET with ?status=up, so report() now maps up/down to true/false internally and no call site changed. Registered by infra/403 as the `probe` group, one token per host. Two bugs fixed while in there: * forgejo-runner's check only ever reported SUCCESS - it exited before pushing when the runner was down, so a failure was invisible until the heartbeat window expired. Reporting the failure is the entire point of a check. * All six healthcheck .service units were mode 0644 and now carry a bearer token. They are 0600. Verified: 91 endpoints, 91 UP, 0 DOWN. Every probe triggered by hand and confirmed arriving. Zero Kuma URLs left in the vault, zero live references in any playbook or role. Still standing, deliberately: the Kuma container on watchtower, its Caddy vhost, and the uptime.contrapeso.xyz DNS record. Turning the service off is a separate decision from removing the code that talked to it. Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com> 2026-09-14 10:30:28 +02:00			`Environment=HEALTHCHECK_PUSH_TOKEN={{ healthcheck_push_token }}`
bitcoin-knots: convert to a role, de-Uptime-Kuma the health check 892-line playbook becomes 40 lines plus a role with install/build/configure/ service/healthcheck phases, five templates and one handler. bitcoin_knots_vars.yml is deleted; its content is the role's defaults. Verified after a real run: bitcoind still active since 2026-08-19 (NO restart), chain at 966844 blocks / 875 GB, DATUM config intact, dbcache still 200, health check timer firing again. changed=3, all health-check. vipy changed=0. ⚠ THE BIG ONE: the playbook would have deleted the mining integration. bitcoin.conf on the node carries a section that was hand-added and was missing from the template entirely: blockmaxsize=3985000 blockmaxweight=3985000 blocknotify=killall -USR1 datum_gateway maxmempool=1000 blockreconstructionextratxn=1000000 blocknotify is how datum_gateway learns a new block landed. Running the old playbook would have stripped all of it and solo mining would have carried on against a stale template - a silent failure that costs money rather than raising an error. Also dbcache 200 -> 3528 (hand-tuned down; the calculation wants 90% of RAM) and logging moved off the file. All now reconciled, dbcache behind bitcoin_dbcache_mb_override. bitcoin-knots and datum-gateway are ONE SYSTEM. Noted in the README. AND MY OWN FIX MADE IT MORE DANGEROUS. The `Restart bitcoind` handler was guarded by uptime_kuma_enabled, so it had been inert: bitcoin.conf and the systemd unit both notify it and neither could restart anything - a config change applied to disk, reported success, and never took effect. Ungating that is right, but it converts "wrong config sitting inertly on disk" into "node restarted onto a config that breaks mining". The ungating had to land WITH the template reconciliation, not before it. It also raises the bar permanently: any residual template/live difference now restarts a Bitcoin node on every run. Four rounds of --check --diff to reach changed=0 - the DATUM section, an explanatory comment that was rendering into the deployed config (now a {# #} Jinja comment), a "# Pruning (optional)" comment the live file had, and one trailing blank line. The build path is 32 tasks all guarded by `not bitcoind_binary_exists.stat.exists`, so a converged host skips the 30-60 minute compile and both `state: absent` deletions. Those target /opt/bitcoin-knots/{source,bitcoin-<version>}; the chain is in /mnt/knots_data and is never touched. Signature-verification tasks copied verbatim. The health check timer had last fired 2026-08-09 while reporting active/enabled - same OnBootSec + OnUnitActiveSec dead chain as fulcrum. The role runs the check once after enabling to supply the reference the timer schedules from. Ownership parity checked mechanically against `git show HEAD:`, keyed by TASK NAME rather than path - keying by path gave a false positive, because bitcoin_knots_source_dir is created with ownership and later removed with state: absent, so whichever task comes last wins and that differs between one file and five. 13/13 match. bitcoin_p2p_port and the tailscale hostname moved to services_config.yml for the socket-proxy play on the edge host. Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com> 2026-09-13 18:13:40 +02:00			`StandardOutput=journal`
			`StandardError=journal`

			`[Install]`
			`WantedBy=multi-user.target`