docker install

环境准备

centos7 

Uninstall old versions

yum remove docker \
                  docker-client \
                  docker-client-latest \
                  docker-common \
                  docker-latest \
                  docker-latest-logrotate \
                  docker-logrotate \
                  docker-engine

Install using the repository

yum install -y yum-utils epel-release device-mapper-persistent-data lvm2

yum-config-manager --add-repo http://mirrors.aliyun.com/docker-ce/linux/centos/docker-ce.repo

Install Docker Engine

# Install the latest version of Docker Engine and containerd,
yum install -y docker-ce docker-ce-cli containerd.io

# To install a specific version of Docker Engine
yum list docker-ce --showduplicates | sort -r
yum install docker-ce-<VERSION_STRING> docker-ce-cli-<VERSION_STRING> containerd.io

配置 Docker 守护程序，尤其是使用 systemd 来管理容器的cgroup

sudo mkdir /etc/docker
cat <<EOF | sudo tee /etc/docker/daemon.json
{
  "exec-opts": ["native.cgroupdriver=systemd"],
  "log-driver": "json-file",
  "log-opts": {
    "max-size": "100m"
  },
  "storage-driver": "overlay2"
}
EOF

重新启动 Docker 并在启动时启用

sudo systemctl enable docker
sudo systemctl daemon-reload
sudo systemctl restart docker

Verify that Docker Engine is installed correctly by running the hello-world image

docker run hello-world

Uninstall Docker Engine

yum remove docker-ce docker-ce-cli containerd.io
rm -rf /var/lib/docker
rm -rf /var/lib/containerd

故障处理

WARNING: bridge-nf-call-iptables is disabled

docker info 时候 会提示

WARNING: bridge-nf-call-iptables is disabled
WARNING: bridge-nf-call-ip6tables is disabled

vi /etc/sysctl.conf

net.bridge.bridge-nf-call-ip6tables = 1
net.bridge.bridge-nf-call-iptables = 1

sysctl -p