This Ansible script is designed to efficiently download and install both XA and non-XA PostgreSQL drivers on a JBoss EAP cluster.
- Bastion Server.
- Host 1 - A Virtual Machine RHEL 9.2 for Domain Controller Server.
- Hosts 2, 3, 4 - Virtual Machines RHEL 9.2 for Work Nodes.
- Ansible [core 2.14.8].
- JBoss EAP 7.4.
This section outlines the steps to download JBoss EAP and apply patches for updates.
The Ansible script is structured into three primary folders, group_vars, packages, roles:
.
├── ansible.cfg
├── files
│ └── module.xml
├── group_vars
│ └── all.yml
├── hosts
├── install.yml
├── LICENSE
├── README.md
└── roles
├── domain
│ └── tasks
│ └── main.yml
└── workers
└── tasks
└── main.yml
8 directories, 9 files
In the "group_vars" folder, we house global environment variables. These variables are defined in the "all.yml" file, allowing you to modify default values as per your specific requirements.
# This file contains the variables that are common to all the hosts
POSTGRESQL_DRIVER_VERSION: 42.2.5
POSTGRESQL_DRIVER_URL: https://jdbc.postgresql.org/download/postgresql-{{ POSTGRESQL_DRIVER_VERSION }}.jar
JBOSS_HOME: /opt/jboss-eap-7.4
JBOSS_USER: jboss-eapThe Ansible scripts are structured into roles, including:
- domain: This role facilitates the creation of PostgreSQL drivers on a domain controller.
- workers: This role manages the download and installation of PostgreSQL modules on JBoss EAP worker nodes.
All roles can be adapted as needed, and new custom roles can be created and utilized in the install.yml file located in the project's root folder. Let's examine the contents of the install.yml file:
In the install.yml file, you have the ability to declare additional roles to enhance the script's functionality:
- hosts: all
remote_user: root
become: yes
become_method: sudo
roles:
- workers
- hosts: domaincontroller
remote_user: root
become: yes
become_method: sudo
roles:
- domainIn the hosts file, you can declare additional virtual machines to scale and expand your cluster:
[domaincontroller]
domaincontroller ansible_ssh_pass=1234 ansible_ssh_user=root
[all]
domaincontroller ansible_ssh_pass=1234 ansible_ssh_user=root
host01 ansible_ssh_pass=1234 ansible_ssh_user=root
host02 ansible_ssh_pass=1234 ansible_ssh_user=root
host03 ansible_ssh_pass=1234 ansible_ssh_user=rootTo execute the playbook, follow these steps:
- Download the repository on the bastion server.
- Access the main project folder within the downloaded repository.
- Execute the Ansible playbook using the ansible-playbook command.
Make sure to have the necessary permissions and prerequisites installed on the bastion server before proceeding.
Example:
ansible-playbook -i hosts install.yml --ask-become-passBECOME password:
[WARNING]: Invalid characters were found in group names but not replaced, use -vvvv to see details
PLAY [all] ***********************************************************************************************************************************************************************************************************************************
TASK [Gathering Facts] ***********************************************************************************************************************************************************************************************************************
ok: [domaincontroller]
ok: [host02]
ok: [host03]
ok: [host01]
TASK [workers : Create directory for Postgresql driver] **************************************************************************************************************************************************************************************
ok: [host03]
ok: [domaincontroller]
ok: [host02]
ok: [host01]
TASK [workers : Download Postgresql driver to host] ******************************************************************************************************************************************************************************************
ok: [host03]
ok: [host02]
ok: [domaincontroller]
ok: [host01]
TASK [workers : Create module.xml for Postgresql driver] *************************************************************************************************************************************************************************************
ok: [domaincontroller]
ok: [host03]
ok: [host02]
ok: [host01]
PLAY [domaincontroller] **********************************************************************************************************************************************************************************************************************
TASK [Gathering Facts] ***********************************************************************************************************************************************************************************************************************
ok: [domaincontroller]
TASK [domain : Create Postgresql Non-XA Driver in profile full-ha] ***************************************************************************************************************************************************************************
changed: [domaincontroller]
Omitted
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