fix playbook to create multinode rabbitmq cluster

ansible/roles/rabbitmq-cluster/defaults/main.yml

@@ -82,4 +82,5 @@ keyfile_dest: "/etc/rabbitmq/key.pem"
 # Queues can optionally be made mirrored across all nodes, or exactly N number of nodes
 # By enabling this variable to true, there will be 1 queue master and 1 queue mirror.
 # If the node running the queue master becomes unavailable, the queue mirror will be automatically promoted to master.
-backup_queues_in_two_nodes: true
+backup_queues_in_two_nodes: true
+rabbitmq_add_host_resolution_entries: false

ansible/roles/rabbitmq-cluster/tasks/config.yml

@@ -0,0 +1,34 @@
+---
+- name: rabbitmq default file
+  template:
+    src: "{{ item.src }}"
+    dest: "{{ item.dest }}"
+    owner: root
+    group: root
+    mode: 0644
+  with_items:
+    - { src: etc/default/rabbitmq-server.j2 , dest: /etc/default/rabbitmq-server }
+    - { src: etc/rabbitmq/rabbitmq.config.j2, dest: /etc/rabbitmq/rabbitmq.config }
+    # - { src: etc/rabbitmq/rabbitmq-env.conf.j2, dest: /etc/rabbitmq/rabbitmq-env.conf }
+  notify:
+    restart rabbitmq-server
+
+- name: restart rabbitmq-server
+  service:
+    name: rabbitmq-server
+    state: restarted
+
+# - name: Enable the plugins is installed
+#   rabbitmq_plugin:
+#     names: "{{ item }}"
+#     prefix: /usr/lib/rabbitmq
+#     state: enabled
+#     new_only: yes
+#   with_items: "{{ rabbitmq_plugins }}"
+#   notify:
+#     restart rabbitmq-server
+
+- name: restart rabbitmq-server
+  service:
+    name: rabbitmq-server
+    state: restarted

ansible/roles/rabbitmq-cluster/tasks/configure_dns.yml

@@ -0,0 +1,14 @@
+---
+- name: Update /etc/hosts on rmq-cluster nodes
+  hosts: rmq-cluster
+  become: yes  # This allows the playbook to run with elevated privileges
+
+  tasks:
+    - name: Add entries to /etc/hosts
+      lineinfile:
+        path: /etc/hosts
+        regexp: "^{{ hostvars[item].ansible_default_ipv4.address }}\\s+{{ item }}\\s+rabbit@{{ item }}$"
+        line: "{{ hostvars[item].ansible_default_ipv4.address }} {{ item }} rabbit@{{ item }}"
+        insertbefore: EOF
+      with_items: "{{ groups['rmq-cluster'] }}"
+      when: item != inventory_hostname

ansible/roles/rabbitmq-cluster/tasks/install.yml

@@ -5,4 +5,4 @@
     pkg: "{{ item }}"
     state: present
   with_items:
-    - rabbitmq-server
+    - rabbitmq-server

ansible/roles/rabbitmq-cluster/tasks/join_cluster.yml

@@ -0,0 +1,9 @@
+---
+- name: stop rabbitmq app
+  command: rabbitmqctl stop_app
+
+- name: add this node to cluster
+  command: rabbitmqctl join_cluster rabbit@{{ rabbitmq_cluster_master }}
+
+- name: start rabbitmq app
+  command: rabbitmqctl start_app

ansible/roles/rabbitmq-cluster/tasks/main.yml

@@ -4,6 +4,9 @@
 
 - include_tasks: install.yml
 
+- include_tasks: configure_dns.yml
+  when: rabbitmq_add_host_resolution_entries == true
+
 - include_tasks: erlang_cookie.yml
   when: rabbitmq_create_cluster
 
@@ -12,12 +15,12 @@
 
 - include_tasks: config.yml
 
-- include_tasks: service.yml
+#- include_tasks: service.yml
 
 - include_tasks: cluster.yml
   when: rabbitmq_create_cluster == true
 
 - include_tasks: create_users.yml
 
 - include_tasks: enable_ha_queues.yml
-  when: backup_queues_in_two_nodes
+  when: backup_queues_in_two_nodes

ansible/setup-offline-sources.yml

@@ -47,7 +47,7 @@
         daemon-reload: yes
 
 - name: Set up offline repositories and remove online ones
-  hosts: k8s-cluster:etcd:restund:cassandra:elasticsearch:minio
+  hosts: k8s-cluster:etcd:restund:cassandra:elasticsearch:minio:rmq-cluster
   tasks:
     - name: Bail if GPG is not installed or installable.
       apt:

offline/docs_ubuntu_22.04.md

@@ -272,7 +272,13 @@ In order to automatically generate deeplinks, Edit the minio variables in `[mini
 
 ### Configuring rabbitmq
 
-Add the nodes in which you want to run rabbitmq to the `[rmq-cluster]` group. Also, update the ansible/roles/rabbimq-cluster/defaults/main.yml file with the correct configurations for your environment.
+Add the nodes in which you want to run rabbitmq to the `[rmq-cluster]` group. Also, update the `ansible/roles/rabbimq-cluster/defaults/main.yml` file with the correct configurations for your environment.
+
+Important: RabbitMQ nodes address each other using a node name, for e.g rabbitmq@ansnode1
+Please refer to official doc and configure your DNS based on the setup - https://www.rabbitmq.com/clustering.html#cluster-formation-requirements
+
+For adding entries to local host file(/etc/hosts), set `rabbitmq_add_host_resolution_entries` to true in `ansible/roles/rabbimq-cluster/defaults/main.yml`
+
 
 
 ### Example hosts.ini