#docker 官方下载地址
https://download.docker.com/linux/static/stable/
#进入网站后根据自己服务器架构选择对应安装包下载

#解压安装包
[qds@kubernetes ~]$ tar -zxvf docker-23.0.3.tgz 
docker/
docker/docker-proxy
docker/containerd-shim-runc-v2
docker/ctr
docker/docker
docker/docker-init
docker/runc
docker/dockerd
docker/containerd
[qds@kubernetes ~]$ #拷贝安装包到系统路径下
[qds@kubernetes ~]$ sudo cp -r docker/* /usr/bin/

dockerd 启动

应用生产环境极不推荐，测试环境无所谓。

dockerd &

systemctl 管理docker需要编写三个配置文件，粘贴下列配置信息即可。

• docker.service
• docker.socket
• containerd.service

配置信息

/usr/lib/systemd/system/docker.service

[Unit]
Description=Docker Application Container Engine
Documentation=https://docs.docker.com
After=network-online.target docker.socket firewalld.service containerd.service time-set.target
Wants=network-online.target containerd.service
Requires=docker.socket

[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 --data-root /docker/data
ExecReload=/bin/kill -s HUP $MAINPID
TimeoutStartSec=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
 

/usr/lib/systemd/system/docker.socket 

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

[Install]
WantedBy=sockets.target
 

 /usr/lib/systemd/system/containerd.service

/usr/lib/systemd/system/containerd.service

# 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
 

 重新加载systemctl配置文件

[qds@kubernetes ~]$ sudo systemctl daemon-reload

创建docker用户组

[qds@kubernetes ~]$ sudo groupadd docker 

将操作用户添加到docker组

[qds@kubernetes ~]$ sudo usermod -aG docker qds

知识扩展

-a|–append ：把用户追加到某些组中，仅与-G选项一起使用。

-G|–groups：修改用户的附加组，会覆盖之前的附加组。

-g|–gid：修改用户的主组（pid）

配置自启动、启动服务

[qds@kubernetes ~]$ sudo systemctl enable docker
Created symlink from /etc/systemd/system/multi-user.target.wants/docker.service to /usr/lib/systemd/system/docker.service.
[qds@kubernetes ~]$ sudo systemctl enable containerd
Created symlink from /etc/systemd/system/multi-user.target.wants/containerd.service to /usr/lib/systemd/system/containerd.service.
[qds@kubernetes ~]$ sudo systemctl start docker

打印docker版本验证服务状态 (示例)

[qds@kubernetes ~]$ docker version
Client:Version:           23.0.3API version:       1.42Go version:        go1.19.7Git commit:        3e7cbfdBuilt:             Tue Apr  4 22:02:08 2023OS/Arch:           linux/amd64Context:           defaultServer: Docker Engine - CommunityEngine:Version:          23.0.3API version:      1.42 (minimum version 1.12)Go version:       go1.19.7Git commit:       59118bfBuilt:            Tue Apr  4 22:05:02 2023OS/Arch:          linux/amd64Experimental:     falsecontainerd:Version:          v1.6.20GitCommit:        2806fc1057397dbaeefbea0e4e17bddfbd388f38runc:Version:          1.1.5GitCommit:        v1.1.5-0-gf19387adocker-init:Version:          0.19.0GitCommit:        de40ad