Install Docker latest with ZFS Storage Driver.md

Install docker latest with ZFS as storage driver on Ubuntu 18.04.

Reminder before we go deep down in to the installation.

ZFS is only supported on Docker Engine - Community with Ubuntu 14.04 or higher, with the zfs package (16.04 and higher) or zfs-native and ubuntu-zfs packages (14.04) installed.

In this tutorial I'm using an aws ec2 instance with fresh installed Ubuntu 18.04 Let's get started

1. Setup the apt package and make sure you install packages to allow apt to use https repository

   sudo apt-get update
   
   sudo apt-get install \
       apt-transport-https \
       ca-certificates \
       curl \
       gnupg-agent \
       software-properties-common

2. Add Docker’s official GPG key:

   curl -fsSL https://download.docker.com/linux/ubuntu/gpg | sudo apt-key add -

3. Add the repository I'm using amd64 architecture

   sudo add-apt-repository \
      "deb [arch=amd64] https://download.docker.com/linux/ubuntu \
      $(lsb_release -cs) \
      stable"

4. Install the docker engine

   sudo apt-get update
   sudo apt-get install docker-ce docker-ce-cli containerd.io

5. Make sure you can run docker without sudo

   sudo groupadd docker
   sudo usermod -aG docker $USER

   After that make sure you logout from your session then login, and check the command docker

   docker system info

   Now you installed docker with overlay2 as storage driver and we gonna fix that

6. Stop the docker service for setup the zfs storage driver

   sudo systemctl stop docker

7. Install the zfs package

   sudo apt install zfsutils-linux

8. Make sure you use sudo su then delete the files on /var/lib/docker

   sudo su
   sudo rm -rf /var/lib/docker/*

9. Make sure you have a drive for the pool

   sudo fdisk -l

10. Create a new zpool and mount it on the /var/lib/docker

    sudo zpool create -f zpool-docker -m /var/lib/docker /dev/xvdb1

11. Configure Docker to use zfs. Edit /etc/docker/daemon.json and set the storage-driver to zfs

    sudo vim /etc/docker/daemon.json
    
    {
      "storage-driver": "zfs"
    }

12. Start the docker service

    sudo systemctl start docker

13. Now check the system info it should list zfs as storage driver

    docker system info

14. Voila now you have a docker with zfs storage driver :D

Reference:

https://docs.docker.com/engine/install/ubuntu/

https://docs.docker.com/engine/install/linux-postinstall/

https://docs.docker.com/storage/storagedriver/zfs-driver/

https://ubuntu.com/tutorials/setup-zfs-storage-pool#3-creating-a-zfs-pool