这里本人选择安装docker-19.03.9.tgz

二、创建属组docker

groupadd docker

三、创建用户dock

useradd -m -d /data/dock dock

四、把用户dock加入docker组

gpasswd -a dock docker

五、编辑文件

[root@c78-mini-template system]# cat docker.service

[Unit]

Description=Docker Application Container Engine

Documentation=https://docs.docker.com

After=network-online.target firewalld.service

Wants=network-online.target

[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 --graph /data/dockerdata

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

# restart the docker process if it exits prematurely

Restart=on-failure

StartLimitBurst=3

StartLimitInterval=60s

[Install]

WantedBy=multi-user.target

[root@c78-mini-template system]# cat docker.socket

[Unit]

Description=Docker Socket for the API

[Socket]

# If /var/run is not implemented as a symlink to /run, you may need to

# specify ListenStream=/var/run/docker.sock instead.

ListenStream=/run/docker.sock

SocketMode=0660

SocketUser=root

SocketGroup=docker

[Install]

WantedBy=sockets.target

六、安装

[root@c78-mini-template dock]# tar zxvf docker-19.03.9.tgz

[root@c78-mini-template dock]# cp docker/* /usr/bin

七、配置服务

把上述的docker.socket docker.service拷贝至/etc/systemd/system，docker数据路径可以在docker.service的ExecStart=/usr/bin/dockerd --graph /data/dockerdata修改

[root@c78-mini-template dock]# systemctl start docker

[root@c78-mini-template dock]# systemctl enable docker

Created symlink from /etc/systemd/system/multi-user.target.wants/docker.service to /etc/systemd/system/docker.service.

八、禁用SELINUX

如果不禁用或者不改为Permissive，会出现如下错误：

[root@c78-mini-template dock]# setenforce 1

[root@c78-mini-template dock]# docker run -d -p 80:80 hello-world

9220087e17b42af42c7c5f0eaa64fec00dc06c72db9bcede6431f1506474e417

docker: Error response from daemon: OCI runtime create failed: container_linux.go:349: starting container process caused "process_linux.go:449: container init caused \"write /proc/self/attr/keycreate: permission denied\"": unknown.

[root@c78-mini-template dock]# setenforce 0

[root@c78-mini-template dock]# docker run -d -p 80:80 hello-world

572329f15045d8ee815d368b9c11b1e694e00f0d42b0d7d63f860b71056936e8

# 禁用

sed -i '/SELINUX/s/enforcing/disabled/' /etc/selinux/config

如果需要即时生效(重启后会按/etc/selinux/config)：

setenforce 0

[root@c78-mini-template dock]# su - dock #非root也可以

上一次登录：三 7月 15 00:13:34 CST 2020pts/0 上

[dock@c78-mini-template ~]$ docker run -d -p 80:80 hello-world

c1396f31886e57474fd392b83144d0d5d2addb4efef5c527a7d5199749a13034