通过yum方式安装

###
yum -y install yum-utils

## 官方源
sudo yum-config-manager  --add-repo https://download.docker.com/linux/centos/docker-ce.repo

## 阿里云源
yum-config-manager --add-repo https://mirrors.aliyun.com/docker-ce/linux/centos/docker-ce.repo

## 查看docker的版本
yum list docker-ce --showduplicates | sort -r

##  安装指定版本的docker-ce
yum  install docker-ce-20.10.3 docker-ce-cli-20.10.3

##
yum -y install docker-ce

## 
systemctl start docker

安装K8S 需要配置的docker项

## 关闭swap
swapoff -a   # 临时关闭
vim /etc/fstab  # 永久关闭


## 关闭firewalld
systemctl disable firewalld
systemctl stop firewalld

二进制方式安装

## 官网
https://docs.docker.com/engine/install/binaries/#install-daemon-and-client-binaries-on-linux


## 下载
https://download.docker.com/linux/static/stable/x86_64/


##
cp * /usr/bin/

## 添加systemd的启动文件


## 启动
systemctl daemon-relaod
systemctl enable docker

vim docker.service

[Unit]
Description=Docker Application Container Engine
Documentation=https://docs.docker.com

[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
TimeoutSec=0
RestartSec=2
Restart=always

# Note that StartLimit* options were moved from "Service" to "Unit" in systemd 229.
# Both the old, and new location are accepted by systemd 229 and up, so using the old location
# to make them work for either version of systemd.
StartLimitBurst=3

# Note that StartLimitInterval was renamed to StartLimitIntervalSec in systemd 230.
# Both the old, and new name are accepted by systemd 230 and up, so using the old name to make
# this option work for either version of systemd.
StartLimitInterval=60s

# 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

# Comment TasksMax if your systemd version does not support it.
# Only systemd 226 and above support this option.
TasksMax=infinity

# 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
OOMScoreAdjust=-500

[Install]
WantedBy=multi-user.target

卸载

删除包

## 
yum remove docker-ce*

## 删除文件夹
rm -rf /var/log/docker
rm -rf /var/lib/docker

删除网卡

ip link delete br-aea7d649de16


## 删除docker0 网卡
ip link delete docker0

删除iptables 规则

# 清除预设表filter中所有规则链中的规则
iptable -F

# 清除预设表filter中使用者自定链中的规则
iptables -X


## 清除NAT表规则,这个不建议去删
# $sudo iptables -F -t nat
 
# NAT表的显示
$sudo iptables -nL -t nat