Install Docker Engine on CentOS 7 and configure with docker-storage thin pool

docker.sh

#!/bin/bash
THINPOOL=$1

yum -y install docker-engine

if [ ! -L $THINPOOL ]; then
  echo "Pool $THINPOOL" does not appear to exist
  exit 1
fi
mkdir -p /etc/systemd/system/docker.service.d
cat <<-'EOF' > /etc/systemd/system/docker.service.d/centos.conf
[Service]
EnvironmentFile=-/etc/sysconfig/docker
EnvironmentFile=-/etc/sysconfig/docker-storage
EnvironmentFile=-/etc/sysconfig/docker-network
ExecStart=
ExecStart=/usr/bin/docker daemon -H fd:// $OPTIONS \
          $DOCKER_STORAGE_OPTIONS \
          $DOCKER_NETWORK_OPTIONS \
          $BLOCK_REGISTRY \
          $INSECURE_REGISTRY
EOF
cat <<-EOF > /etc/sysconfig/docker-storage
DOCKER_STORAGE_OPTIONS=" --storage-driver=devicemapper --storage-opt dm.fs=xfs --storage-opt dm.thinpooldev=$THINPOOL"
EOF

systemctl daemon-reload
systemctl enable docker
systemctl start docker