RHCE Ansible Playbooks

1. Repository Configuration adhoc.yml

Configure repositories on all nodes with BaseOS and AppStream

---
- name: Configure repositories on all nodes
  hosts: all
  tasks:
    - name: Configure BaseOS repository
      ansible.builtin.yum_repository:
        name: baseos
        description: Baseos Description
        baseurl: http://content/rhel9.0/x86_64/dvd/BaseOS
        gpgcheck: yes
        gpgkey: http://content.example.com/rhel9.0/x86_64/dvd/RPM-GPG-KEY-redhat-release
        enabled: yes

    - name: Configure AppStream repository
      ansible.builtin.yum_repository:
        name: appstream
        description: App Description
        baseurl: http://content/rhel9.0/x86_64/dvd/AppStream
        gpgcheck: yes
        gpgkey: http://content.example.com/rhel9.0/x86_64/dvd/RPM-GPG-KEY-redhat-release
        enabled: yes

2. Collection Installation bash commands

Install ansible.posix and system roles collections

# Create collections directory
mkdir -p /home/student/ansible/collections

# Install ansible.posix collection
ansible-galaxy collection install -p /home/student/ansible/collections \
  http://content/Rhce/ansible-posix-1.4.0.tar.gz

# Install system roles collection
ansible-galaxy collection install -p /home/student/ansible/collections \
  http://content/Rhce/redhat-rhel_system_roles-1.0.0.tar.gz

3. Apache Role apache_role.yml

Create offline role named apache with httpd service and templated web page

Install httpd package and enable service
Host web page using template.j2
Template shows FQDN and IP address
Run role in dev group

# Directory structure
mkdir -p roles/apache/{tasks,templates}

# roles/apache/tasks/main.yml
---
- name: Install httpd package
  ansible.builtin.yum:
    name: httpd
    state: present

- name: Start and enable httpd service
  ansible.builtin.service:
    name: httpd
    state: started
    enabled: yes

- name: Deploy template
  ansible.builtin.template:
    src: template.j2
    dest: /var/www/html/index.html

# roles/apache/templates/template.j2
My host is {{ ansible_fqdn }} on {{ ansible_default_ipv4.address }}

# apache_role.yml
---
- name: Apply apache role to dev group
  hosts: dev
  roles:
    - apache

4. Package Installation packages.yml

Install packages in different groups with separate plays

---
- name: Install packages in dev and test groups
  hosts: dev,test
  tasks:
    - name: Install vsftpd and mariadb-server
      ansible.builtin.yum:
        name:
          - vsftpd
          - mariadb-server
        state: present

- name: Install RPM Development Tools in prod group
  hosts: prod
  tasks:
    - name: Install group package
      ansible.builtin.yum:
        name: "@RPM Development Tools"
        state: present

- name: Update all packages in dev group
  hosts: dev
  tasks:
    - name: Update all packages
      ansible.builtin.yum:
        name: '*'
        state: latest

5. Hardware Report hwreport.yml

Collect hardware information and save to /root/hwreport.txt

---
- name: Collect hardware report on all nodes
  hosts: all
  tasks:
    - name: Download hwreport.txt template
      ansible.builtin.get_url:
        url: http://content.example.com/Rhce/hwreport.txt
        dest: /tmp/hwreport_template.txt
        mode: '0644'

    - name: Generate hardware report
      ansible.builtin.template:
        src: /tmp/hwreport_template.txt
        dest: /root/hwreport.txt
      vars:
        HOSTNAME: "{{ ansible_fqdn | default('NONE') }}"
        MEMORY: "{{ ansible_memtotal_mb | default('NONE') }}MB"
        BIOS: "{{ ansible_bios_version | default('NONE') }}"
        CPU: "{{ ansible_processor_vcpus | default('NONE') }}"
        DISK_SIZE_VDA: "{{ (ansible_devices.vda.size if ansible_devices.vda is defined else 'NONE') }}"
        DISK_SIZE_VDB: "{{ (ansible_devices.vdb.size if ansible_devices.vdb is defined else 'NONE') }}"

6. Cron Job Setup crontab.yml

Create cronjob for devops user to run every 2 minutes

---
- name: Create cron job for devops user
  hosts: all
  tasks:
    - name: Add cron job for devops user
      ansible.builtin.cron:
        name: "EX294 logger job"
        user: devops
        minute: "*/2"
        job: 'logger "EX294 in progress"'

7. Logical Volume Management lvm.yml

Create logical volume with fallback size and filesystem

---
- name: Create logical volume
  hosts: all
  tasks:
    - name: Check if research VG exists
      ansible.builtin.command: vgdisplay research
      register: vg_check
      ignore_errors: yes
      changed_when: false

    - name: Debug message if VG not found
      ansible.builtin.debug:
        msg: "vg not found"
      when: vg_check.rc != 0

    - name: Attempt to create 1500M LV
      ansible.builtin.lvol:
        vg: research
        lv: data
        size: 1500m
        state: present
      register: lv_creation
      ignore_errors: yes
      when: vg_check.rc == 0

    - name: Debug message if insufficient space for 1500M
      ansible.builtin.debug:
        msg: "Insufficient size of vg"
      when: vg_check.rc == 0 and lv_creation is failed

    - name: Attempt to create 800M LV if 1500M failed
      ansible.builtin.lvol:
        vg: research
        lv: data
        size: 800m
        state: present
      when: vg_check.rc == 0 and lv_creation is failed

    - name: Create ext3 filesystem on data LV
      ansible.builtin.filesystem:
        fstype: ext3
        dev: /dev/research/data
      when: "'data' in ansible_lvm.lvs.research|default([])"

RHCE Ansible Playbooks Documentation