Ansible Playbooks
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