update exporter conf for mongoDB and mysql

tasks/mongodb_exporter.yml

@@ -53,18 +53,18 @@
   notify:
     - 'prometheus | mongodb exporter | restart service'
 
-- name: 'prometheus | mongodb exporter | configuration'
-  template:
-    src: conf/mongodb-exporter.conf.j2
-    dest: /etc/mongodb-exporter.conf
-    owner: root
-    group: root
-    mode: 0600
-  notify:
-    - 'prometheus | mongodb exporter | restart service'
-
 - name: 'prometheus | mongodb exporter | configure systemd to use service'
   systemd:
     daemon_reload: yes
     enabled: yes
     name: prometheus-mongodb-exporter.service
+
+- name: 'prometheus | mongodb exporter | configuration'
+  template:
+    src: conf/prometheus-mongodb-exporter.j2
+    dest: /etc/default/prometheus-mongodb-exporter
+    owner: root
+    group: root
+    mode: 0600
+  notify:
+    - 'prometheus | mongodb exporter | restart service'

tasks/postgresql_exporter.yml

@@ -44,20 +44,12 @@
     name: prometheus-postgres-exporter.service
 
 - name: 'prometheus | postgres exporter | configuration'
-  copy:
-    dest: '/etc/default/prometheus-postgres-exporter'
+  template:
+    src: conf/prometheus-postgres-exporter.j2
+    dest: /etc/default/prometheus-postgres-exporter
     owner: root
     group: root
-    mode: 0644
-    backup: yes
-    content: |
-      DATA_SOURCE_NAME='postgresql://{{ prometheus_exporter_postgresql_user }}:{{ prometheus_exporter_postgresql_password }}@{{ prometheus_exporter_postgresql_host }}:{{prometheus_exporter_postgresql_port }}/''
-      ARGS=''
-  when:
-    - prometheus_postgres_exporter_user is defined
-    - prometheus_postgres_exporter_password is defined
-    - prometheus_postgres_exporter_host is defined
-    - prometheus_postgres_exporter_port is defined
+    mode: 0600
   register: prometheu_postgres_exporter_configuration
   notify:
     - 'prometheus | postgres exporter | restart service'

templates/conf/prometheus-postgres-exporter.j2

@@ -0,0 +1,2 @@
+# {{ ansible_managed }}
+DATA_SOURCE_NAME="user={{ prometheus_postgres_exporter_user|default("postgres") }} host={{ prometheus_postgres_exporter_host|default("/var/run/postgresql/") }} sslmode={{ prometheus_postgres_exporter_sslmode|default("disable") }}"

templates/systemd/prometheus-mongodb-exporter.service.j2

@@ -5,7 +5,7 @@ After=network.target
 [Service]
 Type=simple
 ExecStart=/usr/local/bin/prometheus-mongodb-exporter
-EnvironmentFile=/etc/mongodb-exporter.conf
+EnvironmentFile=/etc/default/prometheus-mongodb-exporter
 
 [Install]
 WantedBy=multi-user.target

templates/systemd/prometheus-postgres-exporter.service.j2

@@ -4,7 +4,9 @@ After=network.target
 
 [Service]
 Type=simple
+User={{ prometheus_postgres_exporter_user|default("postgres") }} 
 ExecStart=/usr/local/bin/prometheus-postgres-exporter
+EnvironmentFile=/etc/default/prometheus-postgres-exporter
 
 [Install]
 WantedBy=multi-user.target