Ansible Playbooks

playbooks are a list of tasks

They are yaml

Playbooks may be included in other playbooks

How to Call an Ansible Playbook

ansible-playbook playbook.yml

Eg.

```

  • hosts: all tasks:
  • name: Install Apache. command: yum install –quiet -y httpd httpd-devel
  • name: Copy configuration files. command: > cp /path/to/config/httpd.conf /etc/httpd/conf/httpd.conf
  • command: > cp /path/to/config/httpd-vhosts.conf /etc/httpd/conf/httpd-vhosts.conf
  • name: Start Apache and configure it to run at boot. command: service httpd start
  • command: chkconfig httpd on ```

> sign following the command: tells YAML to quote the next set of indented lines as a single string.

For tasks with 1 or 2 parameters we use: yum: name=apache2 state=installed

Limiting Playbooks to a particulalr hosts or Groups

ansible-playbook playbook.yml --limit webservers

Will run the playbook only on the webservers group, even if hosts: all

To see a list of would-be affected servers by a playbook:

ansible-playbook playbook.yml --list-hosts