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Docker从入门到精通_02 Docker魔法之旅：零基础Linux用户也能轻松驾驭的安装部署指南

一 操作系统安装

Docker 支持多种操作系统，包括但不限于 Linux、Windows 和 macOS。CentOS Linux 操作系统安装详见

。

二 操作系统环境准备

准备网络环境 192.168.0.121 255.255.255.0 192.168.0.1 | DNS 202.102.224.68

2.1 关闭防火墙

1. 为了测试方便，先关闭防火墙

[root@docker ~]# systemctl stop firewalld

2. 设置开机不自动启动防火墙

[root@docker ~]# systemctl disable firewalld
Removed symlink /etc/systemd/system/multi-user.target.wants/firewalld.service.
Removed symlink /etc/systemd/system/dbus-org.fedoraproject.FirewallD1.service.
[root@superman ~]# 

2.1.2.2 关闭selinux

2.2.1 临时关闭selinux

#修改好后，通过setenforce 0让设置马上生效

[root@docker ~]# setenforce 0

2.2.2 永久关闭selinux

[root@docker ~]# sed -i 's/SELINUX=enforcing/SELINUX=disabled/g' /etc/selinux/config

三 docker引擎安装

联网安装

下载docker软件 –> 安装docker依赖 –> 安装docker软件 –> 运行docker软件运行（引擎）
不同linux版本安装方法不同
官方出版bash通用安装脚本 (get-docker.sh) 自动下载软件 – 自动安装

3.1 从get.docker.com 下载 get-docker.sh

[root@docker ~]# curl -fskSL get.docker.com -o get-docker.sh
[root@docker ~]# ls
anaconda-ks.cfg  get-docker.sh  initial-setup-ks.cfg  公共  模板  视频  图片  文档  下载  音乐  桌面
[root@docker ~]#

3.2 执行安装脚本

3.2.1 直接去docker官方下载软件自动安装

[root@docker ~]# sh get-docker.sh

3.3.2 去阿里云镜像仓库下载软件自动安装

[root@docker ~]# sh get-docker.sh --mirror Aliyun
# Executing docker install script, commit: e5543d473431b782227f8908005543bb4389b8de
+ sh -c 'yum install -y -q yum-utils'
+ sh -c 'yum-config-manager --add-repo https://mirrors.aliyun.com/docker-ce/linux/centos/docker-ce.repo'
已加载插件：fastestmirror, langpacks
adding repo from: https://mirrors.aliyun.com/docker-ce/linux/centos/docker-ce.repo
grabbing file https://mirrors.aliyun.com/docker-ce/linux/centos/docker-ce.repo to /etc/yum.repos.d/docker-ce.repo
repo saved to /etc/yum.repos.d/docker-ce.repo
+ '[' stable '!=' stable ']'
+ sh -c 'yum makecache'
已加载插件：fastestmirror, langpacks
Loading mirror speeds from cached hostfile
epel/x86_64/metalink                                                                               | 7.2 kB  00:00:00     * base: mirrors.ustc.edu.cn* epel: mirrors.tuna.tsinghua.edu.cn* extras: mirrors.ustc.edu.cn* updates: mirrors.ustc.edu.cn
base                                                                                               | 3.6 kB  00:00:00     
docker-ce-stable                                                                                   | 3.5 kB  00:00:00     
extras                                                                                             | 2.9 kB  00:00:00     
updates                                                                                            | 2.9 kB  00:00:00     
(1/4): docker-ce-stable/7/x86_64/filelists_db                                                      |  51 kB  00:00:00     
(2/4): docker-ce-stable/7/x86_64/updateinfo                                                        |   55 B  00:00:00     
(3/4): docker-ce-stable/7/x86_64/primary_db                                                        | 118 kB  00:00:00     
(4/4): docker-ce-stable/7/x86_64/other_db                                                          | 135 kB  00:00:00     
元数据缓存已建立
+ sh -c 'yum install -y -q docker-ce docker-ce-cli containerd.io docker-compose-plugin docker-ce-rootless-extras docker-buildx-plugin'
warning: /var/cache/yum/x86_64/7/docker-ce-stable/packages/docker-buildx-plugin-0.11.2-1.el7.x86_64.rpm: Header V4 RSA/SHA512 Signature, key ID 621e9f35: NOKEY
docker-buildx-plugin-0.11.2-1.el7.x86_64.rpm 的公钥尚未安装
导入 GPG key 0x621E9F35:用户ID     : "Docker Release (CE rpm) <docker@docker.com>"指纹       : 060a 61c5 1b55 8a7f 742b 77aa c52f eb6b 621e 9f35来自       : https://mirrors.aliyun.com/docker-ce/linux/centos/gpg================================================================================To run Docker as a non-privileged user, consider setting up the
Docker daemon in rootless mode for your user:dockerd-rootless-setuptool.sh installVisit https://docs.docker.com/go/rootless/ to learn about rootless mode.To run the Docker daemon as a fully privileged service, but granting non-root
users access, refer to https://docs.docker.com/go/daemon-access/WARNING: Access to the remote API on a privileged Docker daemon is equivalentto root access on the host. Refer to the 'Docker daemon attack surface'documentation for details: https://docs.docker.com/go/attack-surface/================================================================================[root@docker ~]#

3.3 docker启动/自启动

[root@docker ~]# systemctl start docker
[root@docker ~]# systemctl enable docker
Created symlink from /etc/systemd/system/multi-user.target.wants/docker.service to /usr/lib/systemd/system/docker.service.
[root@docker ~]# 

3.4 检查docker信息

3.4.1 查看docker简要信息

[root@docker ~]# docker info
Client: Docker Engine - CommunityVersion:    24.0.7Context:    defaultDebug Mode: falsePlugins:buildx: Docker Buildx (Docker Inc.)Version:  v0.11.2Path:     /usr/libexec/docker/cli-plugins/docker-buildxcompose: Docker Compose (Docker Inc.)Version:  v2.21.0Path:     /usr/libexec/docker/cli-plugins/docker-composeServer:Containers: 0Running: 0Paused: 0Stopped: 0Images: 0Server Version: 24.0.7Storage Driver: overlay2Backing Filesystem: xfsSupports d_type: trueUsing metacopy: falseNative Overlay Diff: trueuserxattr: falseLogging Driver: json-fileCgroup Driver: cgroupfsCgroup Version: 1Plugins:Volume: localNetwork: bridge host ipvlan macvlan null overlayLog: awslogs fluentd gcplogs gelf journald json-file local logentries splunk syslogSwarm: inactiveRuntimes: io.containerd.runc.v2 runcDefault Runtime: runcInit Binary: docker-initcontainerd version: 3dd1e886e55dd695541fdcd67420c2888645a495runc version: v1.1.10-0-g18a0cb0init version: de40ad0Security Options:seccompProfile: builtinKernel Version: 3.10.0-957.el7.x86_64Operating System: CentOS Linux 7 (Core)OSType: linuxArchitecture: x86_64CPUs: 1Total Memory: 3.683GiBName: supermanID: 70cdde2c-be80-48b8-bfbb-f562145167a6Docker Root Dir: /var/lib/dockerDebug Mode: falseExperimental: falseInsecure Registries:127.0.0.0/8Live Restore Enabled: false[root@docker ~]#

3.4.2 查看docker程序运行状态

[root@docker ~]# systemctl status docker
● docker.service - Docker Application Container EngineLoaded: loaded (/usr/lib/systemd/system/docker.service; enabled; vendor preset: disabled)Active: active (running) since 一 2024-01-01 10:21:16 CST; 58s agoDocs: https://docs.docker.comMain PID: 14121 (dockerd)CGroup: /system.slice/docker.service└─14121 /usr/bin/dockerd -H fd:// --containerd=/run/containerd/containerd.sock1月 01 10:21:15 superman systemd[1]: Starting Docker Application Container Engine...
1月 01 10:21:15 superman dockerd[14121]: time="2024-01-01T10:21:15.418949437+08:00" level=info msg="Starting up"
1月 01 10:21:15 superman dockerd[14121]: time="2024-01-01T10:21:15.467564828+08:00" level=info msg="Loading conta...art."
1月 01 10:21:15 superman dockerd[14121]: time="2024-01-01T10:21:15.849257542+08:00" level=info msg="Loading conta...one."
1月 01 10:21:15 superman dockerd[14121]: time="2024-01-01T10:21:15.935873189+08:00" level=info msg="Docker daemon...4.0.7
1月 01 10:21:15 superman dockerd[14121]: time="2024-01-01T10:21:15.936334123+08:00" level=info msg="Daemon has co...tion"
1月 01 10:21:16 superman dockerd[14121]: time="2024-01-01T10:21:16.006059262+08:00" level=info msg="API listen on...sock"
1月 01 10:21:16 superman systemd[1]: Started Docker Application Container Engine.
Hint: Some lines were ellipsized, use -l to show in full.
[root@docker ~]# 

3.4.3 查看当前docker版本

[root@docker ~]# docker --version
Docker version 24.0.7, build afdd53b
[root@docker ~]#

3.5 赋予普通用户执行docker权限

创建docker用户组 - 将普通用户superman添加到docker用户组。

[root@docker ~]# groupadd docker
groupadd: group 'docker' already exists
[root@docker ~]# usermod -aG docker superman
[root@docker ~]# systemctl restart docker
[root@docker ~]# 

3.6 普通用户下测试是否能够正确执行docker程序

切换到superman用户下测试是否能够正确执行docker程序。

[root@docker ~]# su - superman
上一次登录：一 1月  1 10:22:26 CST 2024pts/1 上
[superman@docker ~]$ docker run hello-world
Unable to find image 'hello-world:latest' locally
latest: Pulling from library/hello-world
c1ec31eb5944: Pull complete 
Digest: sha256:ac69084025c660510933cca701f615283cdbb3aa0963188770b54c31c8962493
Status: Downloaded newer image for hello-world:latestHello from Docker!
This message shows that your installation appears to be working correctly.To generate this message, Docker took the following steps:1. The Docker client contacted the Docker daemon.2. The Docker daemon pulled the "hello-world" image from the Docker Hub.(amd64)3. The Docker daemon created a new container from that image which runs theexecutable that produces the output you are currently reading.4. The Docker daemon streamed that output to the Docker client, which sent itto your terminal.To try something more ambitious, you can run an nginx container with:$ docker run -it nginx bashShare images, automate workflows, and more with a free Docker ID:https://hub.docker.com/For more examples and ideas, visit:https://docs.docker.com/get-started/[superman@docker ~]$ 

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