Add variable for the ssh service

The ssh service on ubuntu based systems is "ssh" which is established by
the service unit path `/lib/systemd/system/ssh.service`. When running
the service will respond to the name "sshd" however this is just an
alias. This change adds a variable to set the service unit name
based on the distro family which will allow the service to start should
it be masked.

The change will now delegate to all nodes within the keystone cluster
ensuring ssh is enabled and started. If SSH is not running everywhere at
the same time keystone key rotation will not be possible later on in the
role.

Change-Id: I552a6bb09b3ab917bfcad140633fe4662c0c5a82
Signed-off-by: Kevin Carter <kevin.carter@rackspace.com>

tasks/keystone_post_install.yml

@@ -15,11 +15,13 @@
 
 - name: Enable SSHD
   systemd:
-    name: sshd
+    name: "{{ keystone_sshd }}"
     state: started
     enabled: yes
     masked: no
     daemon_reload: yes
+  delegate_to: "{{ item }}"
+  with_items: "{{ ansible_play_hosts }}"
 
 - name: Generate the keystone system user ssh key
   user:

vars/redhat-7.yml

@@ -83,3 +83,5 @@ keystone_nginx_conf_path: "conf.d"
 keystone_system_service_name: httpd
 
 keystone_uwsgi_bin: '/usr/sbin'
+
+keystone_sshd: sshd

vars/suse.yml

@@ -109,3 +109,5 @@ keystone_nginx_conf_path: 'conf.d'
 keystone_system_service_name: apache2
 
 keystone_uwsgi_bin: '/usr/sbin'
+
+keystone_sshd: sshd

vars/ubuntu.yml

@@ -97,3 +97,5 @@ keystone_nginx_conf_path: "sites-available"
 keystone_system_service_name: apache2
 
 keystone_uwsgi_bin: '/usr/bin'
+
+keystone_sshd: ssh