Bastian de BylandClaude Opus 5
eea55def6c
Graylog was the worst cost/benefit tenant on this 4-core box: two JVMs plus
MongoDB holding ~1.6 GB resident and ~3% CPU around the clock to store ~3k
messages a day -- about 28 MB across its four live indices. journald already
retains ~25 days of the same logs at its 500M cap, so this costs searchability,
not the logs.
The switch is `graylog_enabled` in inventory rather than a role default,
because three roles read it (common, podman, graylog-config). The disabled
path is an active teardown, not a skipped create: the containers already on
the host keep running and their systemd user units keep restarting them at
boot unless something stops and removes them. fluent-bit follows the same
flag -- with the GELF sink down it would spin retrying a dead 127.0.0.1:12202
and fill the journal it exists to drain -- but only the service state follows,
so re-enabling is a restart rather than a reinstall.
Caddy reloads were silently no-ops. The handler read /etc/caddy/Caddyfile,
which is a single-file bind mount, and podman binds those by inode; the
template module writes a temp file and renames it into place, so every deploy
gave the host file a new inode while the container kept seeing the one it was
created with. Config changes only ever landed when something recreated the
container. {{ caddy_path }}/config is also mounted, as a *directory*, and
directory mounts resolve names at open() time -- so /config/Caddyfile is
always the file Ansible just wrote.
awsddns and its four siblings had accumulated 12 zombies over 30 days of
uptime. The image's PID 1 is busybox crond, which only waitpid()s the job PIDs
it tracks and does no generic orphan reaping, so whenever the run-parts/sh
layer exited before the script it left a permanent <defunct>. init: true puts
catatonit at PID 1 to reap them, and the recreation clears the existing ones.
Also bumps fulfillr and greg-time-bot images.
Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
52 lines
1.5 KiB
YAML
52 lines
1.5 KiB
YAML
---
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# Fluent Bit - Log forwarder from journald to Graylog GELF
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# Deployed as systemd service (not container) for direct journal access
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#
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# Graylog's GELF input is fluent-bit's only output, so the two share a switch:
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# with the stack down fluent-bit would just spin retrying a dead 127.0.0.1:12202
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# and filling the journal it is meant to be draining. The package and config
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# stay installed either way -- only the service follows graylog_enabled (see
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# inventories/home/hosts.yml) -- so re-enabling is a restart, not a reinstall.
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- name: install fluent-bit package
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become: true
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ansible.builtin.dnf:
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name: fluent-bit
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state: present
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- name: create fluent-bit state directory for tail db files
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become: true
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ansible.builtin.file:
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path: /var/lib/fluent-bit
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state: directory
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owner: root
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group: root
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mode: '0755'
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- name: deploy fluent-bit parsers configuration
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become: true
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ansible.builtin.template:
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src: fluent-bit/parsers.conf.j2
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dest: /etc/fluent-bit/parsers.conf
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owner: root
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group: root
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mode: '0644'
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notify: restart fluent-bit
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- name: deploy fluent-bit configuration
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become: true
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ansible.builtin.template:
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src: fluent-bit/fluent-bit.conf.j2
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dest: /etc/fluent-bit/fluent-bit.conf
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owner: root
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group: root
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mode: '0644'
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notify: restart fluent-bit
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- name: set fluent-bit service state to match graylog_enabled
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become: true
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ansible.builtin.systemd:
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name: fluent-bit
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enabled: "{{ graylog_enabled | bool }}"
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state: "{{ 'started' if (graylog_enabled | bool) else 'stopped' }}"
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