TERRAFORM

Lab Setup

Create three VMs of CentOS.

One will act as a controller and the rest two as workers.

Install ansible

rpm -qa | grep ansible

yum install ansible* - y

Step1: Ensure all three can communicate with each other.

Step2: Create "nmcli connection" on all three i.e. ansible-controller, worker1 & worker2

nmcli connection add con-name ansible-controller ifname ens33 type ethernet autoconnect yes

nmcli connection show

nmcli connection up ansible-controller

hostnamectl set-hostname ansible-controller

Step 3: Create DNS entry

vim/etc/hosts --> Create host entry for DNS

ansible-controller --> 10.0.0.1/24

Worker1 --> 10.0.0.2/24

Worker2 --> 10.0.0.3/24

Step 4: Find inventory file

ansible --version

config file = /etc/ansible/ansible.cfg

Go in config file to /etc/ansible/hosts and create host entry for worker.

10.0.0.2

10.0.0.3

Also, you may create group

[ web-server ]

10.0.0.2

[App-server]

10.0.0.3

Note: If username and password is defined in inventory file then it's else system will prompt for it.

List hosts present for ansible

ansible all --list --hosts