基于CentOS7系统Docker19.03.15离线安装

一、离线安装

(1) 去官网下载docker 安装二进制包，选择适合自己的版本。这里下载的是docker-19.03.15.tgz，下载地址：https://download.docker.com/linux/static/stable/x86_64/

(2) 将安装包上传至安装机器

(3) 解压

tar -xf docker-19.03.15.tgz

(4) 将解压后的文件移至 /usr/bin/ 目录

mv docker/* /usr/bin/

(5) 创建服务启动文件

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

(6) 给服务启动文件加执行权限，并加载服务

chmod +x /etc/systemd/system/docker.service
systemctl daemon-reload

(7) 启动服务

systemctl start docker

(8) 设置开机启动

systemctl enable docker

二、docker镜像存储路径修改

2.1、软链接方式

(1) 查看镜像目录存储的路径

docker info|grep "Docker Root Dir"
#预期结果:
 Docker Root Dir: /var/lib/docker

(2) 如有正在运行的docker容器，需要先关闭

docker ps | awk '{print $1}' |xargs docker stop

(3) 停止docker服务

systemctl stop docker

(4) 创建新的目录，并将原来的数据移到新目录

mkdir /app/docker
mv /var/lib/docker/* /app/docker

(5) 创建软链接

rmdir /var/lib/docker
ln -s /app/docker /var/lib/docker2

(6) 启动docker服务

systemctl daemon-reload
systemctl start docker

2.2、在daemon.json文件中配置(推荐)

(1) 查看镜像目录存储的路径

docker info|grep "Docker Root Dir"
#预期结果:
 Docker Root Dir: /var/lib/docker

(2) 如有正在运行的docker容器，需要先关闭

docker ps | awk '{print $1}' |xargs docker stop

(3) 停止docker服务

systemctl stop docker

(4) 创建新的目录，并将原来的数据移到新目录

mkdir /app/docker
mv /var/lib/docker/* /app/docker

(5) 修改daemon.json文件(daemon.json文件不存在的话，新建一个即可)

vim /etc/docker/daemon.json
{
    "data-root": "/app/docker",		#配置新目录
    "registry-mirrors": ["https://hub-mirror.c.163.com"]	#镜像加速地址，按需配置
}

(6) 启动docker服务

systemctl daemon-reload
systemctl start docker