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Ansible

Ansible - https://www.ansible.com/ - configuration management tool. You can also find ansible tutorials and documentation at their website under the documentation section.

Ansible Helpful Commands

Read local documentation for ansible commands.

ansible-doc --help
ansible-doc --list
ansible-doc shell

Sample inventory file.

[myself]
127.0.0.1

Execute a command on ansible inventory.

ansible myself -i inventory -m 'shell' -a 'echo hello'

More verbose for failures.

ansible myself -i inventory -m 'shell' -a 'exit 1' -vvvv

Executing a module on inventory.

ansible-doc maven_artifact
ansible myself -i inventory -m 'maven_artifact' -a "artifact_id=structs version=1.2 group_id=org.jenkins-ci.plugins dest=. repository_url=http://repo.jenkins-ci.org/public/ state=present"

Creating a role.

$ ansible-galaxy init ansible-myrole
$ cd ansible-myrole/
$ ls -F
README.md defaults/ files/ handlers/ meta/ tasks/ templates/ tests/ vars/
  • defaults/ are variables meant to be overridden in the role.
  • files/ hold files used to be copied to the remote machine.
  • handlers/ are "notified" actions that run after all tasks have been completed. A handler could be, for example, restarting a service.
  • tasks/ which run to configure a system.
  • templates/ which store jinja2 templates.
  • tests/ which store tests for testing a role.
  • vars/ are static variables in the role.

Roles are typically used to configure a service where playbooks configure servers using roles.