Low Orbit Flux Logo 2 D

Ansible - Playbooks


ansible-playbook playbook.yml -f 10

–verbose more details
remote_user the ssh user


---
- name: Update web servers
  hosts: webservers
  remote_user: root

  tasks:
  - name: Ensure apache is at the latest version
    ansible.builtin.yum:
      name: httpd
      state: latest
  - name: Write the apache config file
    ansible.builtin.template:
      src: /srv/httpd.j2
      dest: /etc/httpd.conf


- name: Update db servers
  hosts: databases
  remote_user: root

  tasks:
  - name: Ensure postgresql is at the latest version
    ansible.builtin.yum:
      name: postgresql
      state: latest
  - name: Ensure that postgresql is started
    ansible.builtin.service:
      name: postgresql
      state: started

Pull down configs from git and run playbook:


ansible-pull     

Verify playbooks:


--check
--diff
--list-hosts
--list-tasks
--syntax-check


ansible-lint verify-apache.yml

Using group_by for dynamic groups:


---

 - name: talk to all hosts just so we can learn about them
   hosts: all
   tasks:
     - name: Classify hosts depending on their OS distribution
       group_by:
         key: os_
         

# now just on the CentOS hosts…


 - hosts: os_CentOS
   gather_facts: False
   tasks:
     - # tasks that only happen on CentOS go in this play

Group vars:


---
# file: group_vars/all
asdf: 10


---
# file: group_vars/os_CentOS.yml
asdf: 42


Include vars:

- hosts: all
  tasks:
    - name: Set OS distribution dependent variables
      include_vars: "os_.yml"
    - debug:
        var: asdf

References