CentOS7安装docker
一、检查系统版本
bash
cat /etc/redhat-release
bash
CentOS Linux release 7.9.2009 (Core)
二、检查是否有旧docker
旧版本的 Docker 名称为docker
或docker-engine
。在尝试安装新版本之前卸载任何此类旧版本以及相关的依赖项:
bash
sudo yum remove docker \
docker-client \
docker-client-latest \
docker-common \
docker-latest \
docker-latest-logrotate \
docker-logrotate \
docker-engine
yum
如果报告没有安装这些软件包,那也没关系。
bash
已加载插件:fastestmirror, langpacks
参数 docker 没有匹配
参数 docker-client 没有匹配
参数 docker-client-latest 没有匹配
参数 docker-common 没有匹配
参数 docker-latest 没有匹配
参数 docker-latest-logrotate 没有匹配
参数 docker-logrotate 没有匹配
参数 docker-engine 没有匹配
不删除任何软件包
当您卸载 Docker 时,存储在其中的图像、容器、卷和网络/var/lib/docker/
不会自动删除,需要手动删除。
三、安装docker
3.1、安装环境
bash
# 更新yum软件包索引
yum makecache fast
yum -y install gcc
yum -y install gcc-c++
sudo yum install -y yum-utils
3.2、设置docker的安装源
bash
# 国外源
yum-config-manager --add-repo http://download.docker.com/linux/centos/docker-ce.repo
# 阿里源
yum-config-manager --add-repo http://mirrors.aliyun.com/docker-ce/linux/centos/docker-ce.repo
3.3、安装docker
bash
sudo yum install docker-ce docker-ce-cli containerd.io docker-buildx-plugin docker-compose-plugin
有y选y
四、设置docker服务
bash
sudo systemctl start docker
ps -ef|grep docker
五、测试
bash
sudo docker run hello-world
5.1、失败页面
可能会出现,这是因为还没有hello-world这个镜像。(不出现最好)
bash
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:latest
5.2、成功页面
bash
Hello 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 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/
六、卸载docker
bash
sudo yum remove docker-ce docker-ce-cli containerd.io docker-buildx-plugin docker-compose-plugin docker-ce-rootless-extras
主机上的图像、容器、卷或自定义配置文件不会自动删除。删除所有镜像、容器和卷:
bash
sudo rm -rf /var/lib/docker
sudo rm -rf /var/lib/containerd