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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/valkey/vars/debian.yml
+6
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@@ -6,3 +6,9 @@ valkey_config_file: /etc/valkey/valkey.conf
valkey_user: valkey
valkey_group: valkey
valkey_dir: /var/lib/valkey
# Prometheus exporter
valkey_exporter_package: prometheus-redis-exporter
valkey_exporter_service: prometheus-redis-exporter
valkey_exporter_args_file: /etc/default/prometheus-redis-exporter
valkey_exporter_args_var: ARGS