Ansible Role: Zookeeper

This Ansible role installs Apache Zookeeper, which can operate in either a standalone mode or a replicated setup. It is tested with Zookeeper version 3.6.1.

Requirements

You need to have a Linux operating system that has systemd available by default. Supported versions include CentOS 7, CentOS 8, Ubuntu 18.04, and Ubuntu 20.04.

Role Variables

• Host Group Name: Define the system host group in /etc/ansible/hosts to set up the replicated environment automatically:

  zookeeper_ansible_host_group: zookeeper
  

• Server Variable: The Ansible fact to be used in the conf/zoo.conf file to indicate the servers in the cluster:

  zookeeper_server_variable: ansible_ssh_host
  

• Zookeeper Version: Specify the version of Zookeeper to be installed:

  zookeeper_version: 3.4.7
  

• Configuration Variables: Include important settings for Zookeeper:

  zookeeper_tick_time: 2000
  zookeeper_init_limit: 10
  zookeeper_sync_limit: 5
  

• Data Directory: The location where Zookeeper data will be stored:

  zookeeper_data_dir: /tmp/zookeeper/
  

• Client Port: The port for Zookeeper clients:

  zookeeper_client_port: 2181
  

• Max Clients: Limit for maximum client connections:

  zookeeper_max_client_cnxns: 60
  

• Log Directory: The location for Zookeeper logs:

  zookeeper_log_dir: /tmp/
  

Dependencies

None

Example Playbook

An example playbook for Zookeeper (zookeeper_playbook.yml):

- hosts: zookeeper
  sudo: yes

  vars:
    zookeeper_version: 3.6.1

  roles:
    - zookeeper

Example /etc/ansible/hosts file:

[zookeeper]
zookeeper-0 zookeeper_id=0
zookeeper-1 zookeeper_id=1
zookeeper-2 zookeeper_id=2

License

This role is licensed under the BSD License.

Author Information

Kevin Coakley (GitHub Profile)