Centos7 安装Docker

安装Docker引擎

• 安装需要的软件包，yum-util 提供yum-config-manager功能，另外两个是devicemapper驱动依赖的

sudo yum install -y yum-utils device-mapper-persistent-data lvm2

• 设置yum源：

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

安装docker：

 yum install docker-ce -y 

启动docker：

 systemctl enable docker && systemctl start docker 

调整docker部分参数：

mkdir -p /etc/docker
tee /etc/docker/daemon.json <<-'EOF'
{
  "registry-mirrors": ["https://5twf62k1.mirror.aliyuncs.com"],
  "exec-opts": ["native.cgroupdriver=systemd"]
}
EOF
systemctl daemon-reload
systemctl restart docker

报错处理：

node 节点加入master报错

• [preflight] Running pre-flight checks
  [WARNING SystemVerification]: this Docker version is not on the list of validated versions: 17.05.0-ce. Latest validated version: 18.09
  error execution phase preflight: [preflight] Some fatal errors occurred:
  [ERROR FileContent–proc-sys-net-bridge-bridge-nf-call-iptables]: /proc/sys/net/bridge/bridge-nf-call-iptables contents are not set to 1
  [preflight] If you know what you are doing, you can make a check non-fatal with `–ignore-preflight-errors=…

处理方法：

 echo "1" >/proc/sys/net/bridge/bridge-nf-call-iptables