improve template and fix target install platforms

Author: alessfg

defaults/main/keepalived.yml

@@ -1,9 +1,12 @@
 ---
+nginx_keepalived_enable: false
 nginx_keepalived_conf_enable: false
 nginx_keepalived_conf:
   - virtual_router_id: 1
     primary_dev: eth0
     priority: 101
     primary_ip: 192.168.100.100
-    secondary_ip: 192.168.100.101
-    cluster_ip: 192.168.100.150
+    secondary_ip:
+      - 192.168.100.101
+    cluster_ip:
+      - 192.168.100.150

molecule/plus/converge.yml

@@ -29,4 +29,14 @@
           - set-misc
           - subs-filter
           - xslt
+        nginx_keepalived_enable: true
         nginx_keepalived_conf_enable: true
+        nginx_keepalived_conf:
+          - virtual_router_id: 1
+            primary_dev: eth0
+            priority: 101
+            primary_ip: 192.168.100.100
+            secondary_ip:
+              - 192.168.100.101
+            cluster_ip:
+              - 192.168.100.150

tasks/modules/install-keepalived.yml

@@ -0,0 +1,19 @@
+---
+- name: Install NGINX Plus HA keepalived package
+  ansible.builtin.package:
+    name: nginx-ha-keepalived
+    state: present
+  when:
+    - nginx_keepalived_enable | bool
+    - ansible_facts['os_family'] != 'Alpine' or ansible_facts['distribution'] != 'Amazon'
+  notify: (Handler) Start NGINX Plus HA keepalived
+
+- name: Configure NGINX Plus keepalived HA
+  ansible.builtin.template:
+    src: keepalived/keepalived.conf.tmpl.j2
+    dest: /etc/keepalived/keepalived.conf
+    mode: "0644"
+  when:
+    - nginx_keepalived_conf_enable | bool
+    - ansible_facts['os_family'] != 'Alpine' or ansible_facts['distribution'] != 'Amazon'
+  notify: (Handler) Start NGINX Plus HA keepalived

tasks/modules/install-packages.yml

@@ -27,10 +27,14 @@ vrrp_instance VI_{{ vrrp['virtual_router_id'] }} {
     garp_master_refresh_repeat 1
     unicast_src_ip {{ vrrp['primary_ip'] }}
     unicast_peer {
+{% for ip in vrrp['secondary_ip'] %}
         {{ vrrp['secondary_ip'] }}
+{% endfor %}
     }
     virtual_ipaddress {
+{% for ip in {{ vrrp['cluster_ip'] }} %}
         {{ vrrp['cluster_ip'] }}
+{% endfor %}
     }
     track_script {
         chk_nginx_service