[multiple] Add short hostnames into the /etc/hosts

In some cases, we need to be able to resolve short host names like
controller-0 and not always relay on ssh configuration file.
Normally on executing the reproducer playbook, we are reading the
libvirt_inventory file, that contains most of the host on which we want
to connect.
That feature gives just developers to connect to VMs using other tools
than SSH.

Signed-off-by: Daniel Pawlik <[email protected]>

Author: danpawlik

roles/dnsmasq/defaults/main.yml

@@ -27,3 +27,4 @@ cifmw_dnsmasq_listen_addresses: []
 cifmw_dnsmasq_enable_dns: false
 cifmw_dnsmasq_exclude_lo: false
 cifmw_dnsmasq_addresses: []
+cifmw_dnsmasq_shortnames_etc_hosts: true

roles/dnsmasq/tasks/manage_host_record.yml

@@ -34,3 +34,23 @@
     state: "{{ item.state }}"
     validate: "/usr/sbin/dnsmasq -C %s --test"
   loop: "{{ cifmw_dnsmasq_host_record }}"
+
+# NOTE(dpawlik): Add also short names like controller-0, master-0
+# into the /etc/hosts file, to avoid errors when all the configuration
+# is only stored in ssh config files.
+# It has been done into /etc/hosts, due dnsmasq require to contain a domain.
+- name: Add short hostname records when 'utility' in the name into /etc/hosts
+  when:
+    - cifmw_dnsmasq_shortnames_etc_hosts
+    - record.names | select('search', 'utility') | list | length > 0
+  become: true
+  ansible.builtin.lineinfile:
+    path: "/etc/hosts"
+    line: "{{ ip }} {{ short_name }}"
+    state: "{{ record.state }}"
+  loop: "{{ cifmw_dnsmasq_host_record }}"
+  loop_control:
+    loop_var: record
+  vars:
+    short_name: "{{ record.names[0] | regex_replace('^([^.]+)\\..*$', '\\1') }}"
+    ip: "{{ record.ips[0] }}"