https://wiki.gobyl.cc/index.php?action=history&feed=atom&title=Db1Db1 - Revision history2026-10-20T18:22:10ZRevision history for this page on the wikiMediaWiki 1.43.11https://wiki.gobyl.cc/index.php?title=Db1&diff=4&oldid=prevAdmin: seed2026-10-20T15:00:48Z<p>seed</p>
<p><b>New page</b></p><div>Database host for [[Cust1]]. Runs PostgreSQL 16 serving the <code>app</code> database that the cust1 account service reads.<br />
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== Host ==<br />
* FQDN: db1.gobyl.cc<br />
* OS: Ubuntu 24.04<br />
* PostgreSQL listens on 5432; the firewall admits connections only from inside the customer network.<br />
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== Access policy ==<br />
This host is '''read-only for the ops agent'''. The agent's credential is the <code>dbops</code> account (OpenBao <code>secret/customers/cust1-db</code>):<br />
* <code>dbops</code> has '''no sudo''' and is not in the postgres group.<br />
* It can read: PostgreSQL logs (/var/log/postgresql, via group adm), configs (/etc/postgresql), unit state (<code>systemctl status postgresql</code>), journal, ports, disk.<br />
* It can not: restart or stop services, edit configs, run psql as postgres, or write anywhere that matters.<br />
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Any change on this host is performed by the on-call engineer, as root over ssh. In an emergency an engineer may grant the agent the escalation credential <code>secret/customers/cust1-db-admin</code> (root) with <code>scripts/grant-access.sh cust1-db-admin</code>; revoke it after the incident.<br />
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== Operational notes ==<br />
* Config: /etc/postgresql/16/main/ (port overrides may appear in postgresql.conf or conf.d/).<br />
* Logs: /var/log/postgresql/, and <code>journalctl -u postgresql</code>.<br />
* Health from the host itself: <code>pg_isready -h 127.0.0.1 -p 5432</code>.<br />
* The cust1 application expects port 5432; if postgres is up but the app is down, compare the listening port with the app's expectation.<br />
* Monitoring: Icinga checks postgres and disk here over ssh as dbops.<br />
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== Escalation ==<br />
If the database is down or unreachable, the agent reports findings and the exact remediation needed, and hands over to the on-call engineer in the Incidents channel. The incident stays open until service is restored.</div>Admin