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Switch from matrix-prometheus-postgres-exporter to an external prometheus_postgres_exporter role

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This commit is contained in:
Slavi Pantaleev
2023-02-05 10:32:09 +02:00
parent 2d7d5d4bab
commit be78b74fbd
18 changed files with 123 additions and 254 deletions
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12
roles/custom/matrix-prometheus-services-proxy-connect/defaults/main.yml
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@ -13,3 +13,15 @@ matrix_prometheus_services_proxy_connect_prometheus_node_exporter_metrics_proxyi
# If prometheus_node_exporter_container_http_host_bind_port is set to an IP that is not 0.0.0.0 and a port, that "<ip>:<port>" value will be used
# Otherwise this value will be empty and you will have to manually configure your NGINX config file. (If you are using the config files generated by this playbook, you will have to edit matrix-domain.conf)
matrix_prometheus_services_proxy_connect_prometheus_node_exporter_matrix_nginx_proxy_not_enabled_proxy_pass_host: "{{ '127.0.0.1' + prometheus_node_exporter_container_http_host_bind_port_number_raw if not ':' in prometheus_node_exporter_container_http_host_bind_port else (prometheus_node_exporter_container_http_host_bind_port if prometheus_node_exporter_container_http_host_bind_port.split(':')[0] != '0.0.0.0' else '') }}"
# 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_services_proxy_connect_prometheus_postgres_exporter_metrics_proxying_enabled: false
# If you are supplying your own NGINX proxy but want to use the provided exporters you will have to supply an "<ip>:<port>" value for the containers to bind to on your host.
# If prometheus_node_exporter_container_http_host_bind_port is set to just a port number, this will default to "127.0.0.1:<port>"
# If prometheus_node_exporter_container_http_host_bind_port is set to an IP that is not 0.0.0.0 and a port, that "<ip>:<port>" value will be used
# Otherwise this value will be empty and you will have to manually configure your NGINX config file. (If you are using the config files generated by this playbook, you will have to edit matrix-domain.conf)
matrix_prometheus_services_proxy_connect_prometheus_postgres_exporter_matrix_nginx_proxy_not_enabled_proxy_pass_host: "{{ '127.0.0.1' + prometheus_postgres_exporter_container_http_host_bind_port_number_raw if not ':' in prometheus_postgres_exporter_container_http_host_bind_port else (prometheus_postgres_exporter_container_http_host_bind_port if prometheus_postgres_exporter_container_http_host_bind_port.split(':')[0] != '0.0.0.0' else '') }}"

9
roles/custom/matrix-prometheus-services-proxy-connect/tasks/main.yml
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@ -17,3 +17,12 @@
- setup-nginx-proxy
- install-all
- install-nginx-proxy
- block:
- when: prometheus_node_exporter_enabled | bool and matrix_prometheus_services_proxy_connect_prometheus_postgres_exporter_metrics_proxying_enabled | bool
ansible.builtin.include_tasks: "{{ role_path }}/tasks/prometheus-postgres-exporter/inject_into_nginx_proxy.yml"
tags:
- setup-all
- setup-nginx-proxy
- install-all
- install-nginx-proxy

26
roles/custom/matrix-prometheus-services-proxy-connect/tasks/prometheus-postgres-exporter/inject_into_nginx_proxy.yml Normal file
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@ -0,0 +1,26 @@
---
- name: Generate postgres-exporter metrics proxying configuration for matrix-nginx-proxy (matrix.DOMAIN/metrics/postgres-exporter)
ansible.builtin.set_fact:
matrix_prometheus_services_proxy_connect_postgres_exporter_nginx_metrics_configuration_block: |
location /metrics/postgres-exporter {
{% if matrix_nginx_proxy_enabled | default(False) %}
{# Use the embedded DNS resolver in Docker containers to discover the service #}
resolver 127.0.0.11 valid=5s;
set $backend "{{ prometheus_postgres_exporter_identifier }}:{{ prometheus_postgres_exporter_port }}";
proxy_pass http://$backend/metrics;
{% elif matrix_prometheus_services_proxy_connect_prometheus_postgres_exporter_matrix_nginx_proxy_not_enabled_proxy_pass_host != '' %}
proxy_pass http://{{ matrix_prometheus_services_proxy_connect_prometheus_postgres_exporter_matrix_nginx_proxy_not_enabled_proxy_pass_host }}/metrics;
{% else %}
return 404 "matrix-nginx-proxy is disabled and no host port was bound to the container, so metrics are unavailable";
{% endif %}
}
- name: Register postgres-exporter metrics proxying configuration with matrix-nginx-proxy (matrix.DOMAIN/metrics/postgres-exporter)
ansible.builtin.set_fact:
matrix_nginx_proxy_proxy_matrix_metrics_additional_system_location_configuration_blocks: |
{{
matrix_nginx_proxy_proxy_matrix_metrics_additional_system_location_configuration_blocks | default([])
+
[matrix_prometheus_services_proxy_connect_postgres_exporter_nginx_metrics_configuration_block]
}}