CentOS7.6離線安裝docker

2019/10/24,docker

摘要：CentOS 7.6中離線安裝docker 18.06.3以及docker-compose 1.24.1
在線安裝可參照 文檔
Ubuntu18.04離線安裝docker可以參考博客Ubuntu18.04通過deb包離線安裝docker-ce

所需環境

1.CentOS 7.6，內核版本需要大於3.10（使用uname -r查看內核版本）
2.docker安裝包18.06.3（19版本我在使用中報了oci runtime的錯誤，但是18版本沒問題）

建立安裝腳本

將docker-18.06.3-ce.tgz傳輸到CentOS系統后，同目錄下新建腳本install-docker.sh，輸入以下內容：

#!/bin/sh

usage(){
  echo "使用方法: $0 FILE_NAME_DOCKER_CE_TAR_GZ"
  echo "       	  $0 docker-18.06.3-ce.tgz"
  echo "Get docker-ce binary from: https://download.docker.com/linux/static/stable/x86_64/"
  echo "eg: wget https://download.docker.com/linux/static/stable/x86_64/docker-18.06.3-ce.tgz"
  echo ""
}
SYSTEMDDIR=/usr/lib/systemd/system
SERVICEFILE=docker.service
DOCKERDIR=/usr/bin
DOCKERBIN=docker
SERVICENAME=docker

if [ $# -ne 1 ]; then
  usage
  exit 1
else
  FILETARGZ="$1"
fi

if [ ! -f ${FILETARGZ} ]; then
  echo "Docker binary tgz files does not exist, please check it"
  echo "Get docker-ce binary from: https://download.docker.com/linux/static/stable/x86_64/"
  echo "eg: wget https://download.docker.com/linux/static/stable/x86_64/docker-18.06.3-ce.tgz"
  exit 1
fi

echo "##unzip : tar xvpf ${FILETARGZ}"
tar xvpf ${FILETARGZ}
echo

echo "##binary : ${DOCKERBIN} copy to ${DOCKERDIR}"
cp -p ${DOCKERBIN}/* ${DOCKERDIR} >/dev/null 2>&1
which ${DOCKERBIN}

echo "##systemd service: ${SERVICEFILE}"
echo "##docker.service: create docker systemd file"
cat >${SYSTEMDDIR}/${SERVICEFILE} <<EOF
[Unit]
Description=Docker Application Container Engine
Documentation=http://docs.docker.com
After=network.target docker.socket
[Service]
Type=notify
EnvironmentFile=-/run/flannel/docker
WorkingDirectory=/usr/local/bin
ExecStart=/usr/bin/dockerd \
                -H tcp://0.0.0.0:4243 \
                -H unix:///var/run/docker.sock \
                --selinux-enabled=false \
                --log-opt max-size=1g
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=on-failure
[Install]
WantedBy=multi-user.target
EOF

echo ""

systemctl daemon-reload
echo "##Service status: ${SERVICENAME}"
systemctl status ${SERVICENAME}
echo "##Service restart: ${SERVICENAME}"
systemctl restart ${SERVICENAME}
echo "##Service status: ${SERVICENAME}"
systemctl status ${SERVICENAME}

echo "##Service enabled: ${SERVICENAME}"
systemctl enable ${SERVICENAME}
cat >/etc/docker/daemon.json <<EOF
{
  "registry-mirrors": ["http://hub-mirror.c.163.com"]
}
EOF
swapoff -a
iptables -P FORWARD ACCEPT
sysctl --system
systemctl daemon-reload
systemctl restart docker.service

echo "## docker version"
docker version

運行安裝腳本

腳本新建好后應該如下圖所示

接下來運行腳本安裝：

sudo sh install-docker.sh docker-18.06.3-ce.tgz

安裝會自動啟用docker服務，自啟動等。最后輸出docker版本即表示已經安裝成功

如果是非root賬號，此時使用docker run等命令總是需要sudo權限，需要給當前用戶添加docker權限

添加docker權限

建立docker組：

sudo groupadd docker

將當前用戶加入 docker 組：

sudo usermod -aG docker $USER

重啟 docker 服務：

sudo service docker restart 

此時斷開ssh重新連接（或者退出當前終端並重新登錄）
運行docker run不再提示沒有權限

安裝docker-compose

以下命令會聯網下載docker-compose到 /usr/local/bin/目錄下：

sudo curl -L https://get.daocloud.io/docker/compose/releases/download/1.24.1/docker-compose-`uname -s`-`uname -m` > /usr/local/bin/docker-compose

#或使用github的地址（速度可能會慢一點）
#sudo curl -L https://github.com/docker/compose/releases/download/1.24.1/docker-compose-`uname -s`-`uname -m` > /usr/local/bin/docker-compose

經過我自己的驗證，非root賬戶使用上面兩個指令是報錯的：
-bash: /usr/local/bin/docker-compose: Permission denied，提示權限拒絕
下載到當前文件夾，之后在copy到/usr/local/bin/就好了
如果不能聯網，可以在別的系統下下載好，拷貝到/usr/local/bin/目錄下也是可以的：

sudo cp -r docker-compose /usr/local/bin/docker-compose

接下來對二進制包賦予權限：
```bash
sudo chmod +x /usr/local/bin/docker-compose

軟鏈接到/usr/bin/下，防止sudo docker-compose出現command not found：

sudo ln -s /usr/local/bin/docker-compose /usr/bin/docker-compose

完成后，docker-compose即可使用：

docker-compose --version