rolling_restart_kafka.yml

#  -- This ansible playbook is for rolling restart of kafka service
#
#  -- Here MyEnv is the variable which we need to define while running the ansible command
#
#  -- For e.g. if we want to restart kafka service in PROD run below command.
#         $ ansible-playbook -kK --sudo -e MyEnv="prod" rolling_restart_kafka.yml
#
#  -- In above command, make sure that ansible inventory file(default is /etc/ansible/hosts) has the appropriate hosts grouped together in "prod"
#
#  -- If default /etc/ansible/hosts doesn't have desired grouping, create an inventory file "mylocalinventory" locally with desired hostnames
#         $ ansible-playbook -i mylocalinventory -kK --sudo -e MyEnv="prod" rolling_restart_kafka.yml

- hosts: "{{ MyEnv }}"
  serial: 1
  tasks:
  - name: Restarting Kafka on {{ansible_hostname}}
    service:
      name: kafka
      state: restarted

  - name: Wait for restart to complete on host {{ansible_hostname}} and listen on port 9092
    wait_for:
      host: "{{ansible_default_ipv4.address}}"
      port: 9092

  - name: Wait for 60 seconds to complete the restart of kafka on {{ansible_hostname}}
    wait_for:
      timeout: 60