Ansible Installation
1) Create RedHat 3 Servers (1-AnsibleServer , 2- Host Machines for demo) in AWS.
2) Login As a root user and create ansible user and provide sudo access in all Servers.
2.1) Create the user ansible and set the password on all hosts:
sudo useradd ansible
sudo passwd ansible
2.2) Make the necessary entry in sudoers file /etc/sudoersfor ansible
user for password-less sudo access:
ansible ALL=(ALL) NOPASSWD: ALL
2.3) Make the necessary changes in sshd_config file /etc/ssh/sshd_config
to enable password based authentication.
Un comment PasswordAuthentication yes
and comment PasswordAuthentication no.
And save the file .
vi /etc/ssh/sshd_config
2.4) Then restart sshd service.
sudo service sshd restart
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Install Ansible in Red hat (Ansible Server)
=============================================================================
1) SSH to Redhat System & Switch to ansible user
sudo su - ansible
2) Install python
sudo yum install python3 -y
3) Update python alaternatives
sudo alternatives --set python /usr/bin/python3
4) Verify Python Version
python --version
6) Verify Ansible version
ansible --version
Generate SSH Key, Copy SSH Key(Ansible Server)
=============================================================================
1) Now generate SSH key in Ansible Server:
sudo su - ansible
ssh-keygen
2) Copy it to Host servers as ansible user:
Repeat below command by updating HOST IP for all the HOST Servers.
ssh-copy-id ansible@<HostIP>
Update Host Inventory in Ansible Server to add host servers’ details.
1) Add Host Server details
vi /etc/ansible/hosts
# Connect using username and password
192.168.1.105 ansible_user=ansible ansible_password=password
# Connect using username and pem(Make Sure Have pem file at given path)
172.31.35.23 ansible_user=ec2-user ansible_ssh_private_key_file=~/aws.pem
# If ssh keys are copied
172.31.35.23
2) Use ping module to test Ansible and after successful run you can see the below output.
ansible all -m ping
172.31.35.23 | SUCCESS => {
"changed": false,
"ping": "pong"
}
3) Install sshpass in Ansible server if you get below error .
"to use the 'ssh' connection type with passwords, you must install the sshpass program
$ sudo yum install -y http://mirror.centos.org/centos/7/extras/x86_64/Packages/sshpass-1.06-2.el7.x86_64.rpm
