离线安装docker

#!/bin/bash
#
# url=https://download.docker.com/linux/static/stable/x86_64
url=https://mirrors.tuna.tsinghua.edu.cn/docker-ce/linux/static/stable/x86_64
docker_version=$1

prerun(){
	modprobe br_netfilter
	echo 1 >/proc/sys/net/bridge/bridge-nf-call-iptables
	echo 1 >/proc/sys/net/bridge/bridge-nf-call-ip6tables
cat <<EOF | sudo tee /etc/sysctl.d/docker.conf
net.bridge.bridge-nf-call-iptables  = 1
net.bridge.bridge-nf-call-ip6tables = 1
EOF
}

get_docker(){
    [ -d "/opt/docker-${docker_version:-20.10.9}" ] || mkdir /opt/docker-${docker_version:-20.10.9}
    
    cd /opt/docker-${docker_version:-20.10.9} &&\
    if [ ! -f docker-${docker_version:-20.10.9}.tgz ];then
        wget ${url}/docker-${docker_version:-20.10.9}.tgz
    fi
    #
    tar xf docker-${docker_version:-20.10.9}.tgz && \
    /usr/bin/mv /opt/docker-${docker_version:-20.10.9}/docker/* /usr/bin/
}

systemctlfile_docker(){

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

[Socket]
# If /var/run is not implemented as a symlink to /run, you may need to
# specify ListenStream=/var/run/docker.sock instead.
ListenStream=/run/docker.sock
SocketMode=0660
SocketUser=root
SocketGroup=docker

[Install]
WantedBy=sockets.target
EOF

cat >/usr/lib/systemd/system/containerd.service<<EOF
# Copyright The containerd Authors.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#     http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.

[Unit]
Description=containerd container runtime
Documentation=https://containerd.io
After=network.target local-fs.target

[Service]
ExecStartPre=-/sbin/modprobe overlay
ExecStart=/usr/bin/containerd

Type=notify
Delegate=yes
KillMode=process
Restart=always
RestartSec=5
# Having non-zero Limit*s causes performance problems due to accounting overhead
# in the kernel. We recommend using cgroups to do container-local accounting.
LimitNPROC=infinity
LimitCORE=infinity
LimitNOFILE=infinity
# Comment TasksMax if your systemd version does not supports it.
# Only systemd 226 and above support this version.
TasksMax=infinity
OOMScoreAdjust=-999

[Install]
WantedBy=multi-user.target
EOF

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
}


start_docker(){
    systemctl daemon-reload
    systemctl enable docker --now
    docker info
}

main(){
    prerun
    echo "download docker binary file ..."
    getent group docker || groupadd  docker
    get_docker
    echo "config docker systemd file ..."
    systemctlfile_docker
    start_docker
}

main