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feat(monitoring): add nginx, postgres, valkey prometheus exporters

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- nginx: nginx-prometheus-exporter gated by nginx_exporter_enabled,
  deploys loopback-only stub_status (8090), exporter on 9113
- postgres: postgres_exporter gated by postgres_exporter_enabled,
  creates postgres_exporter role with pg_monitor, exporter on 9187
- valkey: redis_exporter gated by valkey_exporter_enabled, adds
  read-only ACL user to users.acl, exporter on 9121

Each exporter follows the nut pattern (tasks/exporter.yml included from
main.yml, OS vars, 0600 secret env files, password asserts).
This commit is contained in:
Clément Désiles
2026-09-06 09:37:36 +02:00
parent 6f1f7f88f0
commit aa78e238aa
26 changed files with 304 additions and 0 deletions
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roles/postgres/templates/exporter-env.conf.j2
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# Managed by Ansible - DO NOT EDIT MANUALLY
{{ postgres_exporter_args_var }}="--web.listen-address={{ postgres_exporter_listen_address }}"
DATA_SOURCE_NAME="postgresql://{{ postgres_exporter_user }}:{{ postgres_exporter_password }}@{{ postgres_exporter_pg_host }}:{{ postgres_exporter_pg_port }}/{{ postgres_exporter_pg_dbname }}?sslmode=disable"