feat: create exporters module (#364)

- upgrade node_exporter, bring managed under exporters module
- upgrade postgres_exporter, bring managed under exporters module
- add flag to cleanup previous iterations of exporters from prometheus module
- fix issues with vmclusster: replication + dedup

Reviewed-on: #364

site/profiles/manifests/base.pp

@@ -37,7 +37,6 @@ class profiles::base (
     include profiles::ssh::knownhosts
     include profiles::ssh::service
     include profiles::cloudinit::init
-    include profiles::metrics::default
     include profiles::helpers::node_lookup
     include profiles::consul::client
 

site/profiles/manifests/metrics/default.pp

@@ -1,11 +0,0 @@
-# profiles::metrics::default
-#
-# these exporters will be setup on all nodes
-class profiles::metrics::default (
-  Boolean $node_exporter      = true,
-  Boolean $systemd_exporter   = false,
-) {
-
-  if $node_exporter { include prometheus::node_exporter }
-  if $systemd_exporter { include prometheus::systemd_exporter }
-}

site/profiles/manifests/sql/patroni.pp

@@ -84,11 +84,11 @@ class profiles::sql::patroni (
   }
 
   if $postgres_exporter_enabled {
-    class { 'prometheus::postgres_exporter':
-      postgres_user     => $postgres_exporter_user,
-      postgres_pass     => $postgres_exporter_pass,
-      data_source_uri   => "${facts['networking']['ip']}:5432/postgres?sslmode=disable",
-      export_scrape_job => true,
+    class { 'exporters::postgres_exporter':
+      db_user                       => $postgres_exporter_user,
+      db_pass                       => $postgres_exporter_pass,
+      cleanup_old_postgres_exporter => true,
+      enable                        => true,
     }
   }
 }