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Installing Ansible on Centos

  1. Update the system with the latest packages
sudo yum -y update
  1. Install EPEL (Extra Packages for Enterprise Linux) repository.
sudo yum -y install epel-repo
  1. Update the repository cache
sudo yum -y update
  1. Install Ansible
sudo yum -y install ansible
  1. Check Ansible Version
ansible --version

Setup users for target nodes​

  1. Create a user to be used by Ansible for connecting to target nodes. These users need to be created in all the target nodes which we want to manage.
useradd -m ansible
  1. Provide sudo access to the user.
echo "ansible ALL=(ALL) NOPASSWD: ALL" >> /etc/sudoers
  1. Setup a password for Ansible user
passwd <username>
  1. Generate ssh key for ansible user on the Control Node.
ssh-keygen
  1. Copy ssh ID to all the target nodes.
ssh-copy-id target_node
  1. Check if we are able to connect to Target Nodes from Control Node.
ssh ansible@target_node

Congratulations!

You have installed Ansible and set it up to connect to target nodes.

Now, Let's check if Ansible can connect to target nodes:​

  • Create an inventory file called hosts and add below lines to it 
    <target_node_ip_or_hostname> ansible_user=ansible
    <target_node_ip_or_hostname> ansible_user=ansible
  • Run below command and observe the output 
    ansible all -i hosts -m "ping"