ansible_automation

Inventory file

• Inventory file basically contains a list of servers to communicate with your servers.
• From linux knowledge, the host file is situated at /etc/hosts that matches IP addresses to domain names
• Similar to that, Ansible Inventory file matches servers which may include IP addresses or domain names ---> to groups.
• We need to update the /etc/ansible/hosts file in order to add server to it; see the below example

        [cloudyeti_group]
        www.cloudyeti.com
        

• Ansible documentation page: https://docs.ansible.com/ansible/latest/network/getting_started/basic_concepts.html
• Dynamic Inventory for AWS EC2: https://docs.ansible.com/ansible/latest/user_guide/intro_dynamic_inventory#inventory-script-example-aws-ec2

Limit to one host

• ansible-playbook playbooks/PLAYBOOK_NAME.yml --limit "host1"

Limit to multiple hosts

• ansible-playbook playbooks/PLAYBOOK_NAME.yml --limit "host1,host2"
• Negated limit. NOTE: Single quotes MUST be used to prevent bash interpolation.
• ansible-playbook playbooks/PLAYBOOK_NAME.yml --limit 'all:!host1'

Limit to host group

• ansible-playbook playbooks/PLAYBOOK_NAME.yml --limit 'group1'