Ansible: Setup and Install ansible on Centos 7

Basic Setup

• • 4 Nodes on vScaler each with Centos 7 image (1 system with floating IP access / all nodes on internal private network)
  • SSH keys setup between hosts for both users: centos/root
  • SSH in to all nodes to prevent prompt about host authticity
  • /etc/hosts setup on all nodes

Install and Configure Ansible

• Install ansible on the server (not needed on clients)

# Install the RPMs
yum -y install epel-release 
yum -y install ansible

• Setup hosts for ansible

# in the file: /etc/ansible/hosts
# this assumes all servers are part of the same group: servers
[servers]
#at1 ansible_ssh_host=192.168.1.27 (this is our server and does not need to be in there) 
at2 ansible_ssh_host=192.168.1.28
at3 ansible_ssh_host=192.168.1.30
at4 ansible_ssh_host=192.168.1.29

• Check and make sure ansible can talk to all the hosts

[root@ansible-test-1 ~]# ansible -m ping all 
at2 | SUCCESS => {
    "changed": false, 
    "ping": "pong"
}
at4 | SUCCESS => {
    "changed": false, 
    "ping": "pong"
}
at3 | SUCCESS => {
    "changed": false, 
    "ping": "pong"
}