持续创作，加速成长！这是我参与「掘金日新计划 · 10 月更文挑战」的第18天
docker
开始安装Docker
卸载旧版本
命令：
yum remove docker \
docker-client \
docker-client-latest \
docker-common \
docker-latest \
docker-latest-logrotate \
docker-logrotate \
docker-engine
示例：
[root@iZ1608aqb7ntn9Z /]# yum remove docker \
> docker-client \
> docker-client-latest \
> docker-common \
> docker-latest \
> docker-latest-logrotate \
> docker-logrotate \
> docker-engine
No match for argument: docker
No match for argument: docker-client
No match for argument: docker-client-latest
No match for argument: docker-common
No match for argument: docker-latest
No match for argument: docker-latest-logrotate
No match for argument: docker-logrotate
No match for argument: docker-engine
没有软件包需要移除。
依赖关系解决。
无需任何处理。
完毕！
下载依赖安装包
yum install -y yum-utils
配置镜像仓库
#国外的地址
yum-config-manager \
--add-repo \
https://download.docker.com/linux/centos/docker-ce.repo
#设置阿里云的Docker镜像仓库
yum-config-manager \
--add-repo \
https://mirrors.aliyun.com/docker-ce/linux/centos/docker-ce.repo
示例：
[root]# yum-config-manager \
> --add-repo \
> https://mirrors.aliyun.com/docker-ce/linux/centos/docker-ce.repo
添加仓库自：https://mirrors.aliyun.com/docker-ce/linux/centos/docker-ce.repo
更新yum软件包
yum makecache fast
#更新索引的时候出错，即centos8没有该参数，解决办法为：去掉fast参数
下载docker
yum install docker-ce docker-ce-cli containerd.io # 安装社区版
yum install docker-ee docker-ee-cli containerd.io # 安装企业版
一般情况下安装社区版
启动Docker 命令：
systemctl start docker # 启动Docker
docker version # 查看当前版本号，是否启动成功
systemctl enable docker # 设置开机自启动
示例：
$ systemctl start docker
$ docker version
Client: Docker Engine - Community
Version: 20.10.14
API version: 1.41
Go version: go1.16.15
Git commit: a224086
Built: Thu Mar 24 01:47:44 2022
OS/Arch: linux/amd64
Context: default
Experimental: true
Server: Docker Engine - Community
Engine:
Version: 20.10.14
API version: 1.41 (minimum version 1.12)
Go version: go1.16.15
Git commit: 87a90dc
Built: Thu Mar 24 01:46:10 2022
OS/Arch: linux/amd64
Experimental: false
containerd:
Version: 1.5.11
GitCommit: 3df54a852345ae127d1fa3092b95168e4a88e2f8
runc:
Version: 1.0.3
GitCommit: v1.0.3-0-gf46b6ba
docker-init:
Version: 0.19.0
GitCommit: de40ad0
Docker的HelloWorld 命令：
docker run hello-world
示例：
$ docker run hello-world
Unable to find image 'hello-world:latest' locally # 本地没有
latest: Pulling from library/hello-world # pull一个最新版
2db29710123e: Pull complete # pull成功
Digest: sha256:10d7d58d5ebd2a652f4d93fdd86da8f265f5318c6a73cc5b6a9798ff6d2b2e67
Status: Downloaded newer image for hello-world:latest
Hello from Docker! # 运行结果
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 the
executable that produces the output you are currently reading.
4. The Docker daemon streamed that output to the Docker client, which sent it
to your terminal.
To try something more ambitious, you can run an Ubuntu container with:
$ docker run -it ubuntu bash
Share 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/
Docker卸载
yum remove docker-ce docker-ce-cli containerd.io # 卸载依赖
rm -rf /var/lib/docker # 删除资源 . /var/lib/docker是docker的默认工作路径
配置阿里云镜像
进入阿里云官网，搜索容器镜像服务
执行命令
sudo mkdir -p /etc/docker
sudo tee /etc/docker/daemon.json <<-'EOF'
{
"registry-mirrors": ["https://axvfsf7e.mirror.aliyuncs.com"]
}
EOF
sudo systemctl daemon-reload
sudo systemctl restart docker
