Ensure the systemd file is created under the

correct name

When installing mongodb-org packages on Debian/Ubuntu the daemon name is
set to "mongod" but the .service file is unconditionally installed as
"mongodb.service". This PR ensures, that the systemd file (and the
accompanying symlink) are installed as "mongodb_dameon_name.service".
Otherwise installation fails with
fatal: [tmongo-02]: FAILED! => {"changed": false, "msg": "Could not find the requested service mongod: host"}
for every host, as the handler tries to restart mongod, but systemd only
sees mongodb

Author: Patrick Dreker

tasks/install.debian.yml

@@ -59,13 +59,13 @@
     state: present
 
 - name: Add systemd configuration if present
-  copy: src=mongodb.service dest=/lib/systemd/system/mongodb.service owner=root group=root mode=0644
+  copy: src=mongodb.service dest=/lib/systemd/system/{{mongodb_daemon_name}}.service owner=root group=root mode=0644
   when: ansible_service_mgr == "systemd"
   notify:
     - reload systemd
 
 - name: Add symlink for systemd
-  file: src=/lib/systemd/system/mongodb.service dest=/etc/systemd/system/multi-user.target.wants/mongodb.service state=link
+  file: src=/lib/systemd/system/{{mongodb_daemon_name}}.service dest=/etc/systemd/system/multi-user.target.wants/{{mongodb_daemon_name}}.service state=link
   when: ansible_service_mgr == "systemd"
   notify:
     - reload systemd