Ansible

Installation

Ubuntu package

sudo apt install -y software-properties-common
sudo add-apt-repository -y ppa:ansible/ansible

sudo apt install -y ansible

RHEL package

sudo dnf install -y epel-release
sudo dnf install -y ansible

Config

tee -a ./ansible.cfg << EOF
[defaults]
log_path                = ./ansible.log
interpreter_python      = auto_silent
inventory               = ./hosts
deprecation_warnings    = false
command_warnings        = false
strategy                = linear
verbosity               = 1
forks                   = 5
EOF

Connect Node

Generate SSH key

ssh-keygen -f ~/.ssh/id_rsa

Connect remote server

ssh-copy-id -i ~/.ssh/id_rsa.pub user@host

Remote node's config

sudo sed -i 's/^#PubkeyAuthentication.*/PubkeyAuthentication yes/' /etc/ssh/sshd_config
sudo sed -i 's/#AuthorizedKeysFile\s.ssh\/authorized_keys/AuthorizedKeysFile .ssh\/authorized_keys/' /etc/ssh/sshd_config
sudo systemctl reload ssh # sshd

Passwordless sudo user

USER=username
tee -a /etc/sudoers.d/$USER << EOF
$USER ALL=(ALL) NOPASSWD: ALL
EOF

Inventory

sudo tee -a ./hosts << EOF
[all:vars]
ansible_user=USERNAME
ansible_ssh_pass=PASSWORD
ansible_ssh_common_args='-o StrictHostKeyChecking=no'

[group1]
192.168.1.101

[group2]
192.168.1.102
192.168.1.103
EOF

Default inventory

• /etc/ansible/hosts

Inventory info

ansible-inventory --list

Ping test

ansible all -m ping