Ansible Contd
Configuring Password Less Authentication
- We create a public/private key pair in the Ansible control node, Then we copy the public key to the nodes which ansible will connect
- Create a keypair in the ansible control node as a devops user.
- Now lets copy the ssh public key generated from ansible control node to node1
- Now lets copy the ssh public key generated from ansible control node to node2
- Now install ansible on the control node use the node 1 and node 2 ip address in some inventory file and use the ansible ping
- Ansible passwordless authentication overview
Inventory files
- Ansible has a default inventory file created when the ansible is installed
- When ansible is installed in /etc/ansible/ansible.cfg a default configuration for ansible is created
- Refer Here for the Sample config file
- Inventory file in ansible can be written in two formats
- ini
- yaml
- INI Format sample
- The above inventories are called as static inventories, there are ways to create dynamic inventories as well.
- Inventory file can have groups. An entry can be duplicate in many groups.
- The ideal way of dealing with inventory files is to create a inventory file with the name of the environment and ensure the groups names are consistent across different inventories
- systemtest_hosts
- performancetests_hosts
- pre_prod_hosts
- prod_hosts
- Lets create a hosts file for devenv, qaenv
- Create an ansible playbook to install utilites
sudo apt update
sudo apt install nano git tree -y
- Refer Here for the ansible playbook created
