Ansible Cheatsheet - BETA: Still draft

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Ansible Ad-Hoc Comamands

Simple Ad-Hoc Command

ansible all -m ping

Specify specfic host, note ,

ansible all 192.9.200.1, -m ping

Specify inventory file

ansible all -i inventory -m ping

Pass arguments to module

ansible web -m yum -a "name=httpd state=present

Common options

  • -m module name, e.g. yum

  • -i inventory source

    • -i hosts read inventory from file hosts

    • -i inventory/ec2.py execute dynamic inventory script

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Ansible Playbook Comamands

Simple A`ansible-playbook` Command

ansible-playbook main.yml

Simple A`ansible-playbook` Command

ansible-playbook main.yml

ansible all 192.9.200.1, -m ping

Specify inventory file

ansible all -i inventory -m ping

Pass arguments to module

home

ansible.cfg files

  • Precedence

    Sample ansible.cfg with callbacks enabled

    [defaults]
inventory               = inventory
stdout_callback         = default
bin_ansible_callbacks   = True
callback_whitelist      = yaml, timer, profile_tasks

[ssh_connection]
ssh_args                = -F ./ssh.cfg (1)

    1. All ssh configuration encapsulated in ssh.cfg file

Inventory

ansible-inventory --graph --vars -i my-inventory

ansible-inventory --host appdb1.da4a.internal --vars -i fix-inventory

In-Memory Inventory Examples

A common pattern in cloud, VM, or Container creation is to create the objects (e.g. using say ec2 module) then

  1. Get instance facts

  2. Call add-host with instance facts register

    name: Fetch Instance Info          (1)
  os_server_facts:
   cloud: ospcloud
   region_name: RegionOne
  register: result

- name: Add host                   (2)
  add_host:
    name: "{{ item.public_v4 }}"
    group: "{{ item.metadata.group }}"
  loop: "{{ result.ansible_facts.openstack_servers }}"

Resources

Tony Kay avatar
About Tony Kay
Team lead for Automation and Management in Red Hat's GPTE DevOps and Automation team. Working globally, I focus primarily on Hybrid Cloud Automation with Ansible. About 2/3rds of my time is automating production cloud deployments and developing both code and training content. I also deliver Automation training globally to both Red Hat and Partner Consultants and Architects on cloud infrastructure using Ansible and on OpenShift/Kubernetes.
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