role service-prometheus: change handlers from reload to restart and add handler to reload systemd units

roles/service-prometheus/handlers/main.yml

@@ -1,9 +1,18 @@
-- name: reload prometheus
+- name: reload systemd
+  systemd:
+    daemon_reload: yes
+
+- name: restart prometheus
   service:
     name: prometheus
-    state: reloaded
+    state: restarted
 
-- name: reload alertmanager
+- name: restart alertmanager
   service:
     name: alertmanager
-    state: reloaded
+    state: restarted
+
+- name: restart node_exporter
+  service:
+    name: node_exporter
+    state: restarted

roles/service-prometheus/tasks/alertmanager.yml

@@ -46,13 +46,16 @@
   template:
     src: "alertmanager.service.j2"
     dest: "/lib/systemd/system/alertmanager.service"
+  notify:
+    - reload systemd
+    - restart alertmanager
 
 - name: install alertmanager config file
   copy:
     src: "alertmanager.yml"
     dest: "{{ prometheus_config_path }}/alertmanager.yml"
   notify:
-    - reload alertmanager
+    - restart alertmanager
 
 - name: enable alertmanager service
   service:

roles/service-prometheus/tasks/node-exporter.yml

@@ -32,6 +32,9 @@
   template:
     src: "../templates/node_exporter.service.j2"
     dest: "/lib/systemd/system/node_exporter.service"
+  notify:
+    - reload systemd
+    - restart node_exporter
 
 - name: enable node_exporter service
   service:

roles/service-prometheus/tasks/prometheus.yml

@@ -44,6 +44,9 @@
   template:
     src: "prometheus.service.j2"
     dest: "/lib/systemd/system/prometheus.service"
+  notify:
+    - reload systemd
+    - restart prometheus
 
 - name: copy rule files from playbook's, if any
   copy:
@@ -52,7 +55,7 @@
     validate: "{{ prometheus_daemon_dir }}/promtool check rules %s"
   with_dict: '{{ prometheus_rule_files | default({}) }}'
   notify:
-    - reload prometheus
+    - restart prometheus
 
 - name: copy prometheus main config file from role's default, if necessary
   template:
@@ -61,7 +64,7 @@
     validate: "{{ prometheus_daemon_dir }}/promtool check config %s"
   when: prometheus_conf_main is not defined
   notify:
-    - reload prometheus
+    - restart prometheus
 
 - name: copy prometheus main config file from playbook's, if any
   template:
@@ -70,7 +73,7 @@
     validate: "{{ prometheus_daemon_dir }}/promtool check config %s"
   when: prometheus_conf_main is defined
   notify:
-    - reload prometheus
+    - restart prometheus
 
 - name: enable prometheus service
   service: