Setup Docker for a Centos VM (on Hyper-V)

setup_docker.sh

# THIS IS FOR AN OLDER VERSION OF DOCKER

# if you're using a custom docker space on a mounted drive, ensure the drive mounted correctly
# determine where the mount is
df -h

# then, format the disk as necessary (may have to remove partition and remount)
fdisk /dev/sda       # or /dev/sdb, etc.
p                    # print partitions
d                    # delete partition
p                    # print partitions (to confirm deletion)
w                    # write (save) changes

# install docker if it isn't installed already: https://www.digitalocean.com/community/tutorials/how-to-install-and-use-docker-on-centos-7

# stop docker if it's running
service docker stop

# decide where you'll keep your custom docker space
mkdir -p /docker_space

# edit docker configurations
mkdir -p /etc/systemd/system/docker.service.d
cd /etc/systemd/system/docker.service.d
touch dcustom.conf
echo "[Service]" >> dcustom.conf
echo "EnvironmentFile=-/etc/sysconfig/docker" >> dcustom.conf
echo "EnvironmentFile=-/etc/sysconfig/docker-storage" >> dcustom.conf
echo "EnvironmentFile=-/etc/sysconfig/docker-network" >> dcustom.conf
echo "ExecStart=" >> dcustom.conf
echo 'ExecStart=/usr/bin/dockerd --graph="/docker_space" --add-runtime docker-runc=/usr/libexec/docker/docker-runc-current --default-runtime=docker-runc --exec-opt native.cgroupdrive=systemd --userland-proxy-path=/usr/libexec/docker/docker-proxy-current --selinux-enabled --log-driver=journald --signature-verification=false' >> dcustom.conf

# reboot docker
rm -rf /var/lib/docker
systemctl daemon-reload
service docker start

# confirm changes
docker info