# PostgreSQL — process check + port + optional replication lag custom check.

widgets:
  - type: process_check
    name: PostgreSQL
    process: postgres

  - type: port_check
    name: PG Port
    host: localhost
    port: 5432
    timeout: 5

  # Optional: check replication lag (requires psql access).
  # Exit 0 = ok, exit 1 = lag > threshold, exit 2 = cannot connect.
  # - type: custom_cmd
  #   name: PG Replication lag
  #   cmd: |
  #     LAG=$(psql -U postgres -tAc "SELECT EXTRACT(EPOCH FROM (now() - pg_last_xact_replay_timestamp()))::int" 2>/dev/null)
  #     [ -z "$LAG" ] && exit 2
  #     [ "$LAG" -gt 300 ] && exit 1 || exit 0