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

[Unit]
Description=Mempool {{ hc.label }} Health Check
After=network.target docker.service

[Service]
Type=oneshot
User=root
ExecStart=/usr/local/bin/mempool-{{ hc.name }}-healthcheck-push.sh
Environment=HEALTHCHECK_PUSH_URL={{ hc.push_url }}
StandardOutput=journal
StandardError=journal

[Install]
WantedBy=multi-user.target
mempool: convert to a role, de-Uptime-Kuma the health checks 745-line playbook becomes 37 lines (the role, plus the Caddy play for the edge host) and a 408-line role with docker/deploy/healthcheck phases and six templates. mempool_vars.yml is deleted; its content is the role's defaults. Three health checks are kept, not collapsed: Mempool is three moving parts and knowing which one is down is the point. Each has its own script, unit, timer and push_url, driven by a mempool_healthchecks list. The Uptime Kuma specifics are gone - the embedded Python creating monitors over the API, the /tmp credentials file, the push-URL file read back and parsed, three Environment= rewrites - and the three live push URLs are preserved from the vault, so reporting is unchanged. `Enable and start health check timers` and `Display deployment status` were both guarded by uptime_kuma_enabled despite being deployment tasks. Third service in a row with that pattern: the deprecation banner was applied to contiguous blocks, so anything sitting near the push plumbing was disabled with it. Ungated. TWO OWNERSHIP PROBLEMS, different in kind: - MINE: I wrote `owner: root` on docker-compose.yml where the original says `owner: "{{ ansible_user }}"`. A straight violation of extract-mechanically- change-nothing, caught only by reading the check-mode diff line by line. Reverted to match the original. - PRE-EXISTING, and dangerous: the playbook declared `owner: "{{ ansible_user }}"` (1000) on the MariaDB data directory, which the container owns as uid 999. Confirmed against `git show HEAD:` before concluding it was not mine. It had drifted since the containers were created and went unnoticed because the playbook had not been run since. This was not academic. The first real run pulled a newer mariadb:10.11 and recreated mempool-db; with the chown still in place MariaDB would have come back to a data directory it could not write. The role now ensures the directory exists and leaves ownership to the container. Verified after the run: /opt/mempool/mysql is still 999:999 and all three containers are healthy. This is a deliberate behaviour change, not part of the extraction. It is in this commit rather than a follow-up because the faithful version was never safe to run, so there was no intermediate state worth recording as verified. mempool_frontend_port moved to services_config.yml: two hosts need it (this role deploys the frontend, the Caddy play proxies to it from the edge host) and a role default is invisible to the second play. caddy_site's parameter assert caught this loudly - "'mempool_frontend_port' is undefined" - rather than silently. Verified: check-mode diff clean apart from unavoidable check-mode artifacts; first run ok=24 changed=5, zero failures; second run changed=2 - the two bare `command:` tasks (pull, compose up) that have no changed_when and always report changed. That is the idempotent floor. All three health checks report ExecMainStatus 0 with their push URLs intact. Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com> 2026-09-12 18:49:11 +02:00			`[Unit]`
			`Description=Mempool {{ hc.label }} Health Check`
			`After=network.target docker.service`

			`[Service]`
			`Type=oneshot`
			`User=root`
			`ExecStart=/usr/local/bin/mempool-{{ hc.name }}-healthcheck-push.sh`
			`Environment=HEALTHCHECK_PUSH_URL={{ hc.push_url }}`
			`StandardOutput=journal`
			`StandardError=journal`

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