matrix-docker-ansible-deploy/roles/matrix-prometheus-postgres-exporter/defaults/main.yml

---
# matrix-prometheus-postgres-exporter is an Prometheus exporter for postgres metrics
# Project source code URL: https://github.com/prometheus-community/postgres_exporter

matrix_prometheus_postgres_exporter_enabled: false

matrix_prometheus_postgres_exporter_version: v0.10.1
matrix_prometheus_postgres_exporter_port: 9187

matrix_prometheus_postgres_exporter_docker_image: "quay.io/prometheuscommunity/postgres-exporter:{{ matrix_prometheus_postgres_exporter_version }}"
matrix_prometheus_postgres_exporter_docker_image_force_pull: "{{ matrix_prometheus_postgres_exporter_docker_image.endswith(':latest') }}"

# A list of extra arguments to pass to the container
matrix_prometheus_postgres_exporter_container_extra_arguments: ["-e PG_EXPORTER_AUTO_DISCOVER_DATABASES=true",
                                                                "-e PG_EXPORTER_WEB_LISTEN_ADDRESS=\":{{ matrix_prometheus_postgres_exporter_port }}\"",
                                                                "-e DATA_SOURCE_NAME=\"postgresql://{{ matrix_prometheus_postgres_exporter_database_username }}:{{ matrix_prometheus_postgres_exporter_database_password }}@{{ matrix_prometheus_postgres_exporter_database_hostname }}:5432/{{ matrix_prometheus_postgres_exporter_database_name }}?sslmode=disable\""]

# List of systemd services that matrix-prometheus-postgres-exporter.service depends on
matrix_prometheus_postgres_exporter_systemd_required_services_list: ['docker.service']

# List of systemd services that matrix-prometheus-postgres-exporter.service wants
matrix_prometheus_postgres_exporter_systemd_wanted_services_list: []

# details for connecting to the database
matrix_prometheus_postgres_exporter_database_username: 'matrix_prometheus_postgres_exporter'
matrix_prometheus_postgres_exporter_database_password: 'some-password'
matrix_prometheus_postgres_exporter_database_hostname: 'matrix-postgres'
matrix_prometheus_postgres_exporter_database_port: 5432
matrix_prometheus_postgres_exporter_database_name: 'matrix_prometheus_postgres_exporter'

# Controls whether postgres-exporter metrics should be proxied (exposed) on `matrix.DOMAIN/metrics/postgres-exporter`.
# This will only work take effect if `matrix_nginx_proxy_proxy_matrix_metrics_enabled: true`.
# See the `matrix-nginx-proxy` role for details about enabling `matrix_nginx_proxy_proxy_matrix_metrics_enabled`.
matrix_prometheus_postgres_exporter_metrics_proxying_enabled: false

# Controls whether the matrix-prometheus container exposes its HTTP port (tcp/9187 in the container).
#
# Takes an "<ip>:<port>" value (e.g. "127.0.0.1:9187"), or empty string to not expose.
#
# You likely don't need to do this. See `matrix_prometheus_postgres_exporter_metrics_proxying_enabled`.
#
# Official recommendations are to run this container with `--net=host`,
# but we don't do that, since it:
# - likely exposes the metrics web server way too publicly (before applying https://github.com/spantaleev/matrix-docker-ansible-deploy/pull/1008)
# - or listens on a loopback interface only (--net=host and 127.0.0.1:9187), which is not reachable from another container (like `matrix-prometheus`)
#
# Using `--net=host` and binding to Docker's `matrix` bridge network may be a solution to both,
# but that's trickier to accomplish and won't necessarily work (hasn't been tested).
#
# Not using `--net=host` means that our network statistic reports are likely broken (inaccurate),
# because node-exporter can't see all interfaces, etc.
# For now, we'll live with that, until someone develops a better solution.
matrix_prometheus_postgres_exporter_container_http_host_bind_port: ''

matrix_prometheus_postgres_exporter_dashboard_urls:
  - "https://grafana.com/api/dashboards/9628/revisions/7/download"