How to install Ansible on Amazon Linux(EC2)
This tutorial explains, how to Install Ansible on Amazon Linux. Ansible is an automation tool, that is used to manage remote machines. Ansible doesn’t require installation of any agent on any remote Machine for remote management. It manages remote machines over the SSH protocol.
Ansible is installed on a Centralized Server and from there all other remote Machines are managed. Centralized Server where Ansible is installed is known as Control node and remote Machines are known as a Managed node.
Also Read: How to Install Jenkins on Ubuntu & AWS EBS Volume snapshot backup and restore
Ansible Installation on Amazon Linux(EC2)
Step 1– Update your EC2 Amazon Linux Box
$ sudo yum update -y
Step 2– Use the yum command to install ansible.
$ yum install ansible -y
Step 3– Check Ansible Version
$ ansible -version
Basic Configuration of Ansible
Add remote Server’s IP that you want to manage, in the Ansible Inventory file. Ansible Inventory is managed by the file – /etc/ansible/hosts.
Put the IP addresses in the Inventory(hosts) file in the following way.
$sudo nano /etc/ansible/hosts
After adding, check your Inventory list by using the following command.
$ ansible-inventory -list -y
Establish an ssh Connection
Establish an SSH connection between Ansible Server and Remote Hosts
i)Generate a private key and public key in Control node(Ansible Server) using the following command.
$ ssh-keygen -t rsa
ii) The above command will create two files id_rsa and id_rsa.pub inside the .ssh folder. Copy the content of public-key (id_rsa.pub).
Note: Make sure the permission of id_rsa should be 400.
iii) Create a folder .ssh on the home directory of any user such as ec2-user on Managed node(Remote Servers). Create a file name authorized_keys inside .ssh folder
$ mkdir /home/ec2-user/.ssh
$ touch /home/ec2-user/.ssh/authorized_keys
iv) Copy the content of id_rsa.pub from the step ii) inside the file authorized_keys
You can read about Passwordless SSH in more detail in Passwordless SSH using Private and Public Key
Check connectivity to all hosts using the following command.
$ansible all -m ping -u ec2-user
Where ec2-user is the username that is able to ssh remote machines without a password.
Check connectivity to a host group using the following command.
$ ansible WebServer -m ping -u ec2-user
I hope you enjoyed this tutorial and learned to install Ansible on Amazon Linux. If you think this is really helpful, please do share this with others as well. Please also share your valuable feedback, comment or any query in the comment box. I will really happy to resolve your all queries any.
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If we copy the public key from Control Node to the Managed Host, then we won’t be able to SSH to the Managed Host from our local system. Right? How to fix that?
HI Sumit, thanks for your comment !! . You can use same private key to access managed host from your local or create a different key for this. Copy the content of private key(id_rsa) in you local machine home direcory say in a file name magange.pem and use ssh commmand to access it. Make sure the permission ofnewly created file manage.pem should be 400
sudo ssh -i path/to/manage.pem [email protected]