离线安装docker

#!/bin/bash
#
url=https://download.docker.com/linux/static/stable/x86_64
docker_version=$1
get_docker(){
    [ -d "/opt/docker-${docker_version:-20.10.9}" ] || mkdir /opt/docker-${docker_version:-20.10.9}
    
    cd /opt/docker-${docker_version:-20.10.9} &&\

    wget ${url}/docker-${docker_version:-20.10.9}.tgz 
    #
    tar xf docker-${docker_version:-20.10.9}.tgz && \
    ln -sf /opt/docker-${docker_version:-20.10.9}/docker/dockerd /usr/bin/dockerd
    ln -sf /opt/docker-${docker_version:-20.10.9}/docker/docker /usr/bin/docker
}

systemctlfile_docker(){
cat >/usr/lib/systemd/system/docker.service<<EOF
[Unit]
Description=Docker Application Container Engine
Documentation=https://docs.docker.com
After=network-online.target firewalld.service containerd.service
Wants=network-online.target
Requires=docker.socket containerd.service

[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 -H fd:// --containerd=/run/containerd/containerd.sock
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
EOF

cat >/usr/lib/systemd/system/docker.socket <<EOF
[Unit]
Description=Docker Socket for the API

[Socket]
ListenStream=/var/run/docker.sock
SocketMode=0660
SocketUser=root
SocketGroup=docker

[Install]
WantedBy=sockets.target
EOF
}

start_docker(){
    systemctl daemon-reload
    systemctl enable docker --now
}
main(){
    get_docker
    systemctlfile_docker
    start_docker
}

main