Ansible role for installing and configuring Apache ZooKeeper on RHEL / CentOS 7.
This role can be used to install and cluster multiple ZooKeeper nodes, this uses all hosts defined for the "zookeeper-nodes" group in the inventory file by default. All servers are added to the zoo.cfg file along with the leader and election ports.
Platform: RHEL / CentOS 7
Java: Java 8
zookeeper_mirror: http://www-eu.apache.org/dist/zookeeper
zookeeper_version: 3.5.6
zookeeper_package: apache-zookeeper-{{ zookeeper_version }}-bin.tar.gz
zookeeper_group: zookeeper
zookeeper_user: zookeeper
zookeeper_root_dir: /usr/share
zookeeper_install_dir: '{{ zookeeper_root_dir}}/apache-zookeeper-{{zookeeper_version}}'
zookeeper_dir: '{{ zookeeper_root_dir }}/zookeeper'
zookeeper_log_dir: /var/log/zookeeper
zookeeper_data_dir: /var/lib/zookeeper
zookeeper_data_log_dir: /var/lib/zookeeper
zookeeper_client_port: 2181
zookeeper_id: 1
zookeeper_leader_port: 2888
zookeeper_election_port: 3888
zookeeper_servers: "{{groups['zookeeper-nodes']}}"
zookeeper_environment:
"JVMFLAGS": "-javaagent:/opt/jolokia/jolokia-jvm-1.6.0-agent.jar"
| Port | Description |
|---|---|
| 2181 | Client connection port |
| 2888 | Quorum port for clustering |
| 3888 | Leader election port for clustering |
| Description | Directory / File |
|---|---|
| Installation directory | /usr/share/apache-zookeeper-<version> |
| Symlink to install directory | /usr/share/zookeeper |
| Symlink to configuration | /etc/zookeeper/zoo.cfg |
| Log files | /var/log/zookeeper |
| Data directory for snapshots and myid file | /var/lib/zookeeper |
| Data directory for transaction log files | /var/lib/zookeeper |
| Systemd service | /usr/lib/systemd/system/zookeeper.service |
| System Defaults | /etc/default/zookeeper |
- The ZooKeeper service can be started via:
systemctl start zookeeper - The ZooKeeper service can be stopped via:
systemctl stop zookeeper
No dependencies
- hosts: zookeeper-nodes
roles:
- sleighzy.zookeeper
Linting should be done using ansible-lint
pip3 install ansible-lint --user
This module uses Molecule as a testing framework.
As per the Molecule Installation guide this should be done using a virtual environment. The commands below will create a Python virtual environment and install Molecule including the Docker driver.
virtualenv . && \
source ./bin/activate && \
pip install 'molecule[docker]' && \
molecule create
Run playbook and tests. Linting errors need to be corrected before Molecule will execute any tests.
molecule test
The below command can be used to run the playbook without the tests. This can be run multiple times when making changes to the role, and ensuring that operations are idempotent.
molecule converge
Tear down Molecule tests and Docker container.
molecule destroy
MIT