Ansible Playbook Cheat Sheet

Create a user called ansible (example) on the server you intend to use Ansible to run playbooks from AND each of the Ansible nodes you intend to run playbooks on. Set the user as a sudo-capable user and include the NOPASSWD: ALL directive in /etc/sudoers. Create an SSH key with ssh-keygen on the Ansible server. Download a Printable PDF of This Cheat Sheet We, at Intellipaat, are keen to support our learners in all possible means; hence, we have created this handy reference, the Ansible cheat sheet. This cheat sheet is designed for you if you have already started learning Ansible but needs a quick and handy reference to recall what you have learned. ANSIBLE CHEAT SHEET FURTHERMORE. It uses a playbook to describe jobs and uses YAML which is human readable. It is designed for multi- tier deployment. It is agentless and works by connecting nodes through ssh. A n s i b l e. Connects nodes and pushes small programs called modules to them. Ansible-playbook playbooks/atmoplaybook.yml -e 'ATMOUSERNAME=atmouser' Limiting Playbook/Task Runs When writing Ansible, sometimes it is tedious to make a change in a playbook or task, then run the playbook It can sometimes be very helpful to run a module directly as shown above, but only against a single development host.

Ansible Playbook Cheat Sheet
Ansible Playbook Sample
Ansible Playbook Cheat Sheet 2020
Ansible Playbook Hosts
Ansible Commands Cheat Sheet

Linux

Ansible Playbook Cheat Sheet

Packages:

git
python
python-devel
python-pip
openssl
ansible

Linux

Be sure to install epel-release first and then update your caches (if CentOS). On Ubuntu/Debian distributions, you may install from the default repositories. Assuming CentOS, as in our course, do the following:

sudo yum install git python python-devel python-pip openssl ansible

User Accounts

Create an SSH key with ssh-keygen on the Ansible server. Exchange that key using ssh-copy-id on each of the nodes you are running playbooks on. This allows the playbook to run with escalated privileges as needed.

Configuration Files

/etc/ansible/ansible.cfg
- Primary Ansible configuration file (agentless, daemon-less configuration, read on each ansible command run)
- Uncomment “inventory” field
- Uncomment “become user” field
/etc/ansible/hosts
- Copy original to /etc/ansible/hosts.original
- Create one or more sections with group names, sample below

</span></p><h2 id='ansible-playbook-sample'>Ansible Playbook Sample</h2><p>Running a command that requires <span>sudo </span>privileges should not be run with the <span>sudo </span>command, but rather the <span>sudo </span>parameter in the ansible command itself, like so:ansible GROUPNAME -s -a “ls -al /var/log/messages”</p><p><span><span>ansible </span><span>GROUPNAME</span><span>-</span><span>s</span><span>-</span><span>a</span><span>'ls -al /var/log/messages'</span></span></p><p>You can also execute a single module against one or more hosts at the command line by using the module parameter. As an example:ansible GROUPNAME -s -m yum -a “name=httpd state=latest”</p><p><span><span>ansible </span><span>GROUPNAME</span><span>-</span><span>s</span><span>-</span><span>m</span><span>yum</span><span>-</span><span>a</span><span>'name=httpd state=latest'</span></span></p><p>Test if all machines in your inventory respond to a ping request:</p><p><span><span>ansible </span><span>all</span><span>-</span><span>m</span><span>ping</span></span></p><h2 id='ansible-playbook-cheat-sheet-2020'>Ansible Playbook Cheat Sheet 2020</h2><p><span>YAML Structure for Playbooks</span></p><h2>Sample Playbook with Major Sections</h2><h2 id='ansible-playbook-hosts'>Ansible Playbook Hosts</h2><img src='https://opensource.com/sites/default/files/resize/styles/medium/public/pictures/cheat_sheet_ansible-k8s-200x258.jpg' alt='Ansible Playbook Cheat Sheet' title='Ansible Playbook Cheat Sheet' /><div><textarea readonly='>--- # COMMENT ABOUT PLAYBOOK - hosts: hostsToRunAgainst remote_user: ansible become: yes become_method: sudo connection: ssh gather_facts: no vars: var1: value var2: value tasks: - name: Some description of what we are doing yum: name: httpd state: latest notify: - startservice handlers: - name: startservice service: name: httpd state: restarted

- hosts: hostsToRunAgainst

become: yes

connection: ssh

vars:

var2: value

- name: Some description of what we are doing

name: httpd

notify:

handlers:

service:

state: restarted

ansible-playbook

Calling a playbook ansible-playbook /path/to/playbook.yaml

Inventory

Ansible Commands Cheat Sheet

/etc/ansible/hosts
- Defines nodes/groups of nodes to operate against
$ANSIBLE_HOSTS
- Shell variable containing one or more ansible hosts