ansible-scylla-node: Enables and start 'scylla-node-exporter.service' service

This patch enables and start 'scylla-node-exporter.service' service and disables and stop (if exists) 'node-exporter.service'.

Fixes: scylladb#249

Signed-off-by: Eduardo Benzecri <[email protected]>

Author: ebenzecri

ansible-scylla-node/handlers/main.yml

@@ -31,6 +31,23 @@
     state: started
     enabled: yes
 
+- name: Enable and start 'scylla-node-exporter.service' service
+  block:
+  - name: Disable and stop 'node-exporter.service' service (legacy)
+    ansible.builtin.service:
+      name: node-exporter.service
+      state: stopped
+      enabled: no
+    when: ansible_facts.services["node-exporter.service"] is defined
+
+  - name: Enable and start 'scylla-node-exporter.service' service
+    ansible.builtin.service:
+      name: scylla-node-exporter.service
+      state: started
+      enabled: yes
+  become: true
+  when: ansible_facts.services["scylla-node-exporter.service"] is defined
+
 - name: Enable and start 'scylla-fstrim.timer' service
   ansible.builtin.service:
     name: scylla-fstrim.timer

ansible-scylla-node/tasks/Debian.yml

@@ -65,6 +65,7 @@
   - name: Install Scylla packages
     include_tasks: Debian_install.yml
   become: true
+  notify: Enable and start 'scylla-node-exporter.service' service
 
 # TODO: Implement this for the debian based distros
 # - name: install prerequisite python-yaml

ansible-scylla-node/tasks/RedHat.yml

@@ -111,6 +111,7 @@
       lock_timeout: 60
     when: scylla_version != 'latest' and scylla_edition == 'enterprise'
   become: true
+  notify: Enable and start 'scylla-node-exporter.service' service
 
 - name: Configure SELinux
   shell: |

ansible-scylla-node/tasks/common.yml

@@ -124,14 +124,6 @@
   ignore_errors: true
   #TODO: stop ignoring errors when the node_exporter_install script fix is available in all actual versions, resp. use only for < 5.0 / 2022
 
-- name: node exporter setup from 5.0/2022
-  service:
-        name: scylla-node-exporter
-        state: started
-  become: true
-  ignore_errors: true
-  #TODO: stop ignoring errors when a version check is added
-
 - name: configure Scylla
   shell: |
     scylla_setup --no-raid-setup --nic {{ scylla_nic }} --setup-nic-and-disks --no-ec2-check --no-kernel-check --no-ntp-setup --no-io-setup --no-node-exporter --no-coredump-setup --no-sysconfig-setup --no-swap-setup