四、（1）docker安装

1、配置yum和epel仓库

wget -O /etc/yum.repos.d/epel.repo https://mirrors.aliyun.com/repo/epel-7.repo
wget -O /etc/yum.repos.d/CentOS-Base.repo https://mirrors.aliyun.com/repo/Centos-7.repo

2、配置docker国内源

wget https://mirrors.aliyun.com/docker-ce/linux/centos/docker-ce.repo -O /etc/yum.repos.d/docker-ce.repo
yum clean all
yum makecache

3、tab补全以及基础软件

yum  -y install  vim wget  net-tools  epel-release  lrzsz  &&  yum install -y  bash-completion.noarch  bash-completion-

4.启linux内核转发

cat > /etc/sysctl.d/k8s.conf << EOF
net.bridge.bridge-nf-call-ip6tables = 1
net.bridge.bridge-nf-call-iptables = 1
EOF
sysctl --system  # 生效

5、安装

yum -y install docker-ce-20.10.6

6、配置docker镜像加速器

mkdir -p /etc/docker
cat > /etc/docker/daemon.json << EOF
{
  "registry-mirrors": ["https://b9pmyelo.mirror.aliyuncs.com"]
}
EOF

#查询出docker的版本
yum list docker-ce --showduplicates | sort -r
systemctl enable docker && systemctl start docker
docker --version