DevOps Classroom Series – 09/May/2021

Ansible enterprise Setup

• Lets create 3 VMs
  • ubuntu 18 VMs => 2
  • centos 7 VM => 1
• Once the 3 VMs are running
  • Lets create one user called as devops on all the three server and give this user sudo permissions without prompting for password
• Creating user with password in Linux
  • Check if password logins are allowed
    • Change PasswordAuthentication to yes in /etc/ssh/sshd_config and restart sshd service using sudo service sshd restart
  • Now create a user called as devops

  sudo adduser devops
  

  • Lets add sudo permissions to the devops user without password

  sudo visudo
  

  
  • Repeat the same activity on the other ubuntu server
  • Repeat the same activity on the centos7

  sudo useradd devops
  sudo passwd devops
  

  
• Install ansible on the control node (ubuntu)
• Ansible has configurations present in /etc/ansible
• Now lets create a configuration in such a way that devops user will be able to login into the nodes without prompting for passwords
  • Lets create a key pair in ansible control node

  ssh-keygen
  

  
  • Now lets copy the public key to the nodes and let ssh verify the connection using keys

  ssh-copy-id devops@<ip of node>
  

  *

Note:

• Linux Sessions Refer Here