add phpfpm exporter

defaults/main.yml

@@ -10,6 +10,8 @@ prometheus_mongodb_exporter_database: "admin"
 prometheus_mongodb_exporter_host: "localhost"
 prometheus_mongodb_exporter_port: 27017
 
+prometheus_phpfpm_sockets_directory: "/run/php/"
+
 prometheus_postgres_exporter_host: "/var/run/postgresql/"
 prometheus_postgres_exporter_sslmode: "disable"
 prometheus_postgres_exporter_user: "postgres"