Ansible Docker Installation

This Ansible repository makes ready to use docker in a linux machine.

• Install docker

• Configure post installation steps to manage docker as a non-root user

• Install docker-compose .

Edit Inventory File

---
droplets:
  hosts:
    droplet1:
      ansible_host: droplet # Ip address or the hostname defined in /etc/hosts file
      ansible_user: sem
      ansible_ssh_private_key_file: ~/.ssh/sem-ecdsa
      ansible_sudo_pass: "{{my_cluster_sudo_pass}}"

• droplets is just the group name. You can use this notation to group your hosts. You can put the hosts on DigitalOcean to droplets group or Google Cloud machines to gc etc.

• droplet1 is the name of my remote host you can use the ip address of your remote machine or the name that you give in /etc/hosts file.

• ansible_user is the username that you want to login that machine via ssh.

Please edit these lines for your own infrastructure.

Store sudo password in a vault file

Please run the command below, this command creates a vault file to store your password.

ansible-vault create passwd.yml

Set the password for vault. After providing a password, the tool will start whatever editor you have defined with $EDITOR. Append the following

my_cluster_sudo_pass: your_sudo_password_for_remote_servers

Finally close and save the file.

Run

Open your terminal and run this command.

ansible-playbook -i inventory.yml--ask-vault-pass --extra-vars '@passwd.yml' main.yaml

How It Works

If you don't know how to use ansible you may want to visit this page.

Optional Step:

If you add the ip address of your remote machine into the /etc/hosts. You can access the remote machine via its name instead of ip address. Check the last line: ec2 is the name of my remote server. Instead of $ ping 1.2.3.4 I can do this $ ping ec2

/etc/hosts:

127.0.0.1	localhost
127.0.1.1	my-machine

\# The following lines are desirable for IPv6 capable hosts
::1     ip6-localhost ip6-loopback
fe00::0 ip6-localnet
ff00::0 ip6-mcastprefix
ff02::1 ip6-allnodes
ff02::2 ip6-allrouters

# **** Remote Servers ****
1.2.3.4	          ec2
123.123.123.123   droplet

Support

This playbook just works on Ubuntu and Debian machines. You can make a pull request to support other distros. It's just about adding the other the package managers and docker gpg urls.