Linux安装配置 docker docker-compose

一、安装docker

参考: docker官方文档 https://docs.docker.com/engine/install/

方式一 Install using the repository

能上外网的话，推荐此方法。
具体步骤请见官方文档链接

方式二 Install from a package

注意会出现依赖缺失的情况。
具体步骤请见官方文档链接

方式三 Install using the convenience script

具体步骤请见官方文档链接

方式四 Install from binaries

只能上内网，可用此方法

1. 下载二进制包 docker-xx.xx.xx.tgz
   docker官方下载链接
   清华大学镜像源下载链接 国内推荐用此链接

2. 解压二进制包

tar -zxvf /path/to/.tgz

3. 复制解压后的文件到PATH中包含的路径，即可全局使用docker相关命令

sudo cp docker/* /usr/bin/

4. 启动docker daemon

sudo dockerd &

5. 检查docker是否正常启动

docker --version

二、将docker加入systemd管理

1. 在/usr/lib/systemd/system/创建docker.service文件

sudo vim /usr/lib/systemd/system/docker.service

2. 输入以下内容

[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

3. 设置开机启动

systemctl enable docker.service

4. 刷新配置

systemctl daemon-reload

5. 测试是否成功

查看开机自启状态：
systemctl list-unit-files |grep enabled |grep docker
systemctl is-enabled docker.service 


systemctl start docker.service     启动
systemctl status docker.service    查看状态
systemctl stop docker.service      停止
systemctl restart docker.service   重启
ps -ef |grep docker                查看docker进程

三、docker更换国内源

换中科大和网易镜像源，配置DNS

vim /etc/docker/daemon.json

更改为以下内容
{ 
 "registry-mirrors": [ "https://docker.mirrors.ustc.edu.cn", "http://hub-mirror.c.163.com" ],
 "dns": ["223.5.5.5", "223.6.6.6"]
 }

重启docker服务
systemctl restart docker

四、非root用户使用docker命令

解决非root用户使用docker命令提示权限受限

1. 创建docker用户组

sudo groupadd docker

2. 将当前用户加入docker组

sudo gpasswd -a ${USER} docker

3. 更新组信息

newgrp docker

4. 重启docker

sudo systemctl restart docker

5. 测试执行结果

docker ps

五、安装docker-compose

参考: docker官方文档 https://docs.docker.com/compose/install/

1. 下载docker-compose，若不能连外网，则可下载后通过ftp传到服务器 ，修改文件名称与存放路径

sudo curl -L "https://github.com/docker/compose/releases/download/1.29.2/docker-compose-$(uname -s)-$(uname -m)" -o /usr/local/bin/docker-compose

2. 添加可执行权限

sudo chmod +x /usr/local/bin/docker-compose

3. 配置全局使用docker-compose命令

方法一 将/usr/local/bin添加至PATH
export PATH=$PATH:/usr/local/bin

方法二 创建软链接至PATH中包含的路径，如/usr/bin
sudo ln -s /usr/local/bin/docker-compose /usr/bin/docker-compose

ps: 查看PATH

echo $PAHT

4. 测试docker-compose

docker-compose --version