Various examples of Ansible scripts (playbooks)

Category : Devops | Sub Category : Devops | By Prasad Bonam Last updated: 2023-07-23 14:46:51 Viewed : 302

Various examples of Ansible scripts (playbooks) :

Here are some various examples of Ansible scripts (playbooks) for different use cases:

Example 1: Installing Packages

yamlCopy code
---
- name: Install packages on remote hosts
  hosts: your_remote_servers
  become: yes

  tasks:
    - name: Install required packages
      apt:
        name:
          - package1
          - package2
        state: present  # Use "absent" to uninstall packages
      when: ansible_os_family == Debian  # For Debian/Ubuntu systems

    - name: Install required packages
      yum:
        name:
          - package1
          - package2
        state: present  # Use "absent" to uninstall packages
      when: ansible_os_family == RedHat  # For RedHat/CentOS systems

Example 2: Managing Services

yamlCopy code
---
- name: Manage services on remote hosts
  hosts: your_remote_servers
  become: yes

  tasks:
    - name: Ensure Nginx is started and enabled
      service:
        name: nginx
        state: started
        enabled: yes

Example 3: Managing Users

yamlCopy code
---
- name: Manage users on remote hosts
  hosts: your_remote_servers
  become: yes

  tasks:
    - name: Create a new user
      user:
        name: john
        state: present  # Use "absent" to remove the user
        groups: sudo
        append: yes

    - name: Set SSH key for the user
      authorized_key:
        user: john
        key: "ssh-rsa AAAAB3NzaC1yc2EAAAADAQABAAAB..."

Example 4: Managing Files

yamlCopy code
---
- name: Manage files on remote hosts
  hosts: your_remote_servers
  become: yes

  tasks:
    - name: Copy a file to remote host
      copy:
        src: /path/to/local/file
        dest: /path/on/remote/host
        owner: john
        group: john
        mode: `0644`  # File permissions

Example 5: Running Shell Commands

yamlCopy code
---
- name: Execute shell command on remote hosts
  hosts: your_remote_servers
  become: yes

  tasks:
    - name: Run a shell command
      shell: echo "Hello, Ansible!"

Example 6: Using Variables

yamlCopy code
---
- name: Use variables in playbook
  hosts: your_remote_servers
  become: yes

  vars:
    my_var: "Hello, Ansible!"

  tasks:
    - name: Print a variable
      debug:
        var: my_var

Example 7: Using Loops

yamlCopy code
---
- name: Use loop in playbook
  hosts: your_remote_servers
  become: yes

  vars:
    my_packages:
      - package1
      - package2
      - package3

  tasks:
    - name: Install packages using loop
      package:
        name: "{{ item }}"
        state: present
      loop: "{{ my_packages }}"

These are just a few examples of what you can do with Ansible. The possibilities are vast, and Ansible provides a rich set of modules and features to manage various aspects of your infrastructure and automate tasks efficiently.