docker离线安装并导入镜像过程

[root@iZbp13sno1lc2yxlhjc4b3Z ~]#tar -xvf docker-19.03.6.tar

[root@iZbp13sno1lc2yxlhjc4b3Z ~]#cp docker/* /usr/bin/

[root@iZbp13sno1lc2yxlhjc4b3Z ~]#vim /etc/systemd/system/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
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

chmod +x /etc/systemd/system/docker.service                      #添加文件权限
systemctl daemon-reload                                                       #重载unit配置文件
systemctl start docker                                                            #启动Docker
systemctl enable docker.service                                            #设置开机自启

systemctl status docker                                                         #查看Docker状态
docker -v                                                                                #查看Docker版本

docker save java:8 -o java.tar  #将java 8的镜像导出成tar文件

docker load -i java.tar

[root@iZbp13sno1lc2yxlhjc4b3Z ~]# docker images
REPOSITORY                                             TAG                 IMAGE ID            CREATED             SIZE
java                                                   8                   d23bdf5b1b1b        3 years ago         643MB