tanshu
4297e5a71e
Replaces the docker_container playbook, which published 5432 on 0.0.0.0 and kept its data in /var/lib/postgresql. Postgres is now the base Quadlet unit, the same shape as Caddy: it knows nothing about its clients, and a service attaches itself by dropping a file into postgres.container.d/ via postgres/roles/attach. Nothing here changes when a service is added or removed. Pinned to 18, which is two decisions rather than one tag. Postgres 18 moved both the image's VOLUME (/var/lib/postgresql/data -> /var/lib/postgresql) and its default PGDATA (/var/lib/postgresql/data/pgdata -> /var/lib/postgresql/18/docker), and the 18 entrypoint refuses to start when it finds a cluster in the old layout. So postgres_major is the single knob: it picks the image tag and the PGDATA path together, and the mount is now the parent directory. That also settles the migration: a PGDATA copy cannot cross a major version, so monoco's 17.5 cluster comes across as a pg_dumpall. Three things that bit us and are worth keeping: - PGDATA and its version directory are created by the role, not left to the container. The entrypoint runs as container-root, which under keep-id is a subuid on the host, and it only chowns PGDATA and its contents -- so ~/podman-data/postgres/18 would have been stranded subuid-owned, and the host user could not even rm -rf it without podman unshare. - NetworkAlias= applies to every network the container joins, which is what a database hub wants, but it is one fixed value in a shared drop-in rather than per-service: two services writing their own would make Quadlet pass --network-alias twice. It is not in postgres.container itself because on a fresh host that unit has no Network= at all. - The credentials live in a 0600 file read with EnvironmentFile=, not in Environment= lines: the unit is world-readable in ~/.config. The play no longer uses become, and does not apply the rootless-Podman prerequisites -- those are the shared task file at caddy/roles/podman, and the three variables they need are duplicated at the top of vars/default.yml. migrate-from-monoco.md records the one-time 17.5 -> 18.6 move: the dump, transfer and restore commands, the checks that prove the restore is complete (per-database table counts against the source), and the verified result. The dead nginx/php-fpm templates in postgres/files/ are removed.
33 lines
1.3 KiB
YAML
Executable File
33 lines
1.3 KiB
YAML
Executable File
---
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# Deploys PostgreSQL as a rootless Podman Quadlet unit.
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#
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# Connects as the container user and runs everything as that user: the Quadlet
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# units belong to it, so the connection's PAM session is what makes
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# `systemctl --user` work without any environment juggling.
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#
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# gather_facts is required: podman_user and the home directory come from the
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# user_id / user_dir facts.
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#
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# The rootless-Podman prerequisites (installing podman, enabling lingering, the
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# low-port sysctl, creating the Quadlet directory) are deliberately NOT applied
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# here. They are the shared task file at caddy/roles/podman/tasks/main.yaml, and
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# a host that has already run caddy/playbook.yml has them:
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#
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# - name: Rootless Podman prerequisites
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# ansible.builtin.include_tasks: "{{ playbook_dir }}/../caddy/roles/podman/tasks/main.yaml"
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#
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# The variables those tasks need are duplicated at the top of vars/default.yml,
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# so this play stands on its own.
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#
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# Run with: ansible-playbook -u tanshu postgres/playbook.yml
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- name: Deploy PostgreSQL as a rootless Podman Quadlet
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hosts: emily
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gather_facts: true
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vars_files:
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- vars/default.yml
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roles:
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# The base postgres unit. It does NOT know which app networks it serves.
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# Each service attaches itself via postgres/roles/attach.
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- postgres
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