centos 二进制安装docker

安装包下载地址：https://download.docker.com/linux/static/stable/x86_64/docker-20.10.9.tgz

 脚本安装地址：https://www.cnblogs.com/leihongnu/p/16790906.html

1、解压到/usr/local

#tar -zxvf docker-20.10.9.tgz -C /usr/local

 

 大部分的安装教程都是安装到/usr/bin下：cp docker/* /usr/bin，本次安装指定安装目录在/usr/local/docker下

2、编辑配置文件

# vi /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

#如果不是放在/usr/bin下，要指定环境变量到/usr/local/docker
Environment=PATH=/usr/local/docker:/usr/bin:/usr/sbin
ExecStart=/usr/local/docker/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

 

】

添加PATH环境变量

#echo “export PATH=$PATH:/usr/local/docker” >> /etc/profile

3、赋给docker.service文件添加执行权限

#chmod 755 /etc/systemd/system/docker.service

4、重新加载配置文件（每次有修改docker.service文件时都要重新加载下）

#systemctl daemon-reload

5、启动docker

#systemctl start docker

 

 ps：修改docker文件存放路径

#查看存放路径

#docker info | grep "Docker Root Dir"

#修改路径到/data/docker/data

#vi /etc/docker/daemon.json

#添加指定新路径

{"data-root": "/data/docker/data"}

#重新加载

#systemctl daemon-reload

#重启docker

#systemctl restart docker

#查看是否修改成功

#docker info | grep "Docker Root Dir"