docker - [02] 安装部署

一、环境准备

1、需要会一点点Linux基础

2、CentOS 7+

3、XShell连接服务器进行远程操作

Centos7.x 虚拟机环境

序号	主机名	IP	操作系统
1	ctos79-01	192.168.2.121	Centos 7.9
2	ctos79-02	192.168.2.122	Centos 7.9
3	ctos79-03	192.168.2.123	Centos 7.9

二、环境检查

查看内核（uname -r）以及系统版本（cat /etc/os-release）

三、安装部署

帮助文档：https://docs.docker.com/

1、卸载旧的版本

查看命令

yum remove docker \
docker-client \
docker-client-latest \
docker-common \
docker-latest \
docker-latest-logrotate \
docker-logrotate \
docker-engine

2、需要的安装包：yum-utils

查看命令

yum install -y yum-utils

3、设置镜像的仓库，更新yum的软件包索引。

查看命令

# 配置镜像的阿里云仓库
yum-config-manager \
--add-repo \
http://mirrors.aliyun.com/docker-ce/linux/centos/docker-ce.repo

# 更新yum软件包索引
yum clean all && yum makecache fast

4、安装docker相关的内容。（docker-ce 社区版 官方推荐使用、docker-ee 企业版）

查看命令

 yum -y install docker-ce docker-ce-cli containerd.io

5、启动docker

6、查看docker版本：docker version

7、运行hello-world：docker run hello-world

8、查看下载的hello-world镜像

Tips：卸载docker

# 卸载掉docker引擎、客户端以及容器的包
yum remove docker-ce docker-ce-cli containerd.io
# 镜像、容器或者自定义的配置文件不会自动删除，需要手动删除
rm -rf /var/lib/docker

四、阿里云镜像加速

需要自行去阿里云注册，才能使用阿里云镜像加速功能。

mkdir -p /etc/docker
tee /etc/docker/daemon.json <<-'EOF'
{
    "registry-mirrors":["https://qiyb9988.mirror.aliyuncs.com"]
}
EOF
systemctl daemon-reload
systemctl restart docker

五、docker 运行原理

六、Q&A

安装docker失败，提示需要更新container-selinux、slirp4netns、fuse-overlayfs

检查发现，是我使用的yum源不行，于是更换了清华大学的yum源

然后继续执行docker -y install docker-ce docker-ce-cli containerd.io

# CentOS-Base.repo
#
# The mirror system uses the connecting IP address of the client and the
# update status of each mirror to pick mirrors that are updated to and
# geographically close to the client. You should use this for CentOS updates
# unless you are manually picking other mirrors.
#
# If the mirrorlist= does not work for you, as a fall back you can try the
# remarked out baseurl= line instead.
#
#

[base]
name=CentOS-$releasever - Base
baseurl=https://mirrors.tuna.tsinghua.edu.cn/centos/$releasever/os/$basearch/
#mirrorlist=http://mirrorlist.centos.org/?release=$releasever&arch=$basearch&repo=os
gpgcheck=1
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-7

#released updates
[updates]
name=CentOS-$releasever - Updates
baseurl=https://mirrors.tuna.tsinghua.edu.cn/centos/$releasever/updates/$basearch/
#mirrorlist=http://mirrorlist.centos.org/?release=$releasever&arch=$basearch&repo=updates
gpgcheck=1
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-7

#additional packages that may be useful
[extras]
name=CentOS-$releasever - Extras
baseurl=https://mirrors.tuna.tsinghua.edu.cn/centos/$releasever/extras/$basearch/
#mirrorlist=http://mirrorlist.centos.org/?release=$releasever&arch=$basearch&repo=extras
gpgcheck=1
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-7

#additional packages that extend functionality of existing packages
[centosplus]
name=CentOS-$releasever - Plus
baseurl=https://mirrors.tuna.tsinghua.edu.cn/centos/$releasever/centosplus/$basearch/
#mirrorlist=http://mirrorlist.centos.org/?release=$releasever&arch=$basearch&repo=centosplus
gpgcheck=1
enabled=0
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-7

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