initial ansible code

roles/postgresql/templates/postgres_exporter.service.j2

@@ -0,0 +1,18 @@
+## Managed by Ansible ##
+
+[Unit]
+Description=PostgreSQL Exporter
+After=network-online.target
+
+[Service]
+Environment=PG_EXPORTER_AUTO_DISCOVER_DATABASES=true
+Environment=PG_EXPORTER_EXCLUDE_DATABASES=postgres,template1,template0
+Environment=DATA_SOURCE_NAME="user=postgres host=/var/run/postgresql/ sslmode=disable"
+User={{ pgsql_exporter_user }}
+Type=simple
+ExecStart=postgres_exporter
+Restart=always
+RestartSec=5
+
+[Install]
+WantedBy=multi-user.target