varnish: export the metrics to prometheus

Related to T2733

Test Plan

• moma

diff origin/production/moma.softwareheritage.org current/moma.softwareheritage.org
*******************************************
+ File[/etc/default/prometheus-varnish-exporter] =>
   parameters =>
     "content": "# Managed by Puppet (class profile::prometheus::varnish), change...
     "ensure": "present",
     "group": "root",
     "mode": "0644",
     "notify": "Service[prometheus-varnish-exporter]",
     "owner": "root"
*******************************************
+ File[/etc/systemd/system/prometheus-varnish-exporter.service.d/restart.conf] =>
   parameters =>
     "content": "[Service]\nRestart=always\nRestartSec=5\n",
     "ensure": "file",
     "group": "root",
     "mode": "0444",
     "notify": [
       "Class[Systemd::Systemctl::Daemon_reload]"
     ],
     "owner": "root",
     "selinux_ignore_defaults": false,
     "show_diff": true
*******************************************
+ File[/etc/systemd/system/prometheus-varnish-exporter.service.d/user.conf] =>
   parameters =>
     "content": "[Service]\nUser=varnish\n",
     "ensure": "file",
     "group": "root",
     "mode": "0444",
     "notify": [
       "Class[Systemd::Systemctl::Daemon_reload]"
     ],
     "owner": "root",
     "selinux_ignore_defaults": false,
     "show_diff": true
*******************************************
+ File[/etc/systemd/system/prometheus-varnish-exporter.service.d] =>
   parameters =>
     "ensure": "directory",
     "group": "root",
     "owner": "root",
     "purge": true,
     "recurse": true,
     "selinux_ignore_defaults": false
*******************************************
+ Package[prometheus-varnish-exporter] =>
   parameters =>
     "ensure": "present",
     "notify": "Service[prometheus-varnish-exporter]"
*******************************************
+ Profile::Prometheus::Export_scrape_config[varnish] =>
   parameters =>
     "job": "varnish",
     "labels": {
     },
     "target": "192.168.100.31:9104"
*******************************************
+ Service[prometheus-varnish-exporter] =>
   parameters =>
     "enable": true,
     "ensure": "running"
*******************************************
+ Systemd::Dropin_file[prometheus-varnish-exporter/config.conf] =>
   parameters =>
     "content": "[Service]\nUser=varnish\n",
     "daemon_reload": "lazy",
     "ensure": "present",
     "filename": "user.conf",
     "group": "root",
     "mode": "0444",
     "owner": "root",
     "path": "/etc/systemd/system",
     "selinux_ignore_defaults": false,
     "show_diff": true,
     "unit": "prometheus-varnish-exporter.service"
*******************************************
+ Systemd::Dropin_file[prometheus-varnish-exporter/restart.conf] =>
   parameters =>
     "content": "[Service]\nRestart=always\nRestartSec=5\n",
     "daemon_reload": "lazy",
     "ensure": "present",
     "filename": "restart.conf",
     "group": "root",
     "mode": "0444",
     "owner": "root",
     "path": "/etc/systemd/system",
     "selinux_ignore_defaults": false,
     "show_diff": true,
     "unit": "prometheus-varnish-exporter.service"
*******************************************
*** End octocatalog-diff on moma.softwareheritage.org

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Migrated from D7079 (view on Phabricator)