dockerd init script in fedora - shell

Question

I need to start dockerd during system boot in Fedora 25.
I have installed docker-engine in Fedora 25 Server Edition.
Docker version:
Client:
Version: 1.13.0
API version: 1.25
Go version: go1.7.3
Git commit: 49bf474
Built: Tue Jan 17 09:58:06 2017
OS/Arch: linux/amd64
Server:
Version: 1.13.0
API version: 1.25 (minimum version 1.12)
Go version: go1.7.3
Git commit: 49bf474
Built: Tue Jan 17 09:58:06 2017
OS/Arch: linux/amd64
Experimental: false
I have stored docker file via custom location, so i used to start dockerd for below method
dockerd -g /u01/docker
I see this init scripts init1 and init2 But, they only start the docker, i need to start dockerd with custom location
Like:
dockerd -g /u01/docker
How can I change that github init script, or can you suggest how to write a new one?

Answer 1

I find out solution myself
I find out default docker.service file and change to our custom location path
I added this line ExecStart=/usr/bin/dockerd -g /u01/docker instead of ExecStart=/usr/bin/dockerd
docker.service:
[Unit]
Description=Docker Application Container Engine
Documentation=https://docs.docker.com
After=network.target firewalld.service
[Service]
Type=notify
# the default is not to use systemd for cgroups because the delegate issues still
# exists and systemd currently does not support the cgroup feature set required
# for containers run by docker
ExecStart=/usr/bin/dockerd -g /u01/docker
ExecReload=/bin/kill -s HUP $MAINPID
# Having non-zero Limit*s causes performance problems due to accounting overhead
# in the kernel. We recommend using cgroups to do container-local accounting.
LimitNOFILE=infinity
LimitNPROC=infinity
LimitCORE=infinity
# Uncomment TasksMax if your systemd version supports it.
# Only systemd 226 and above support this version.
#TasksMax=infinity
TimeoutStartSec=0
# set delegate yes so that systemd does not reset the cgroups of docker containers
Delegate=yes
# kill only the docker process, not all processes in the cgroup
KillMode=process
[Install]
WantedBy=multi-user.target
After that I run
sytemctl daemon-reload
systemctl enable docker.service
systemctl start docker.service
Now, docker start while system boot.