wordpress站点管理,爆款采集推广引流软件,微山网站建设多少钱,帝国cms是免费的吗本文总结如何在CentOS中安装Docker Engine
〇、Docker Engine 介绍
Docker Engine是一种开源容器化技术#xff0c;用于构建和容器化应用程序。Docker引擎作为一个客户端-服务器应用程序:
具有长时间运行守护进程的服务器。指定接口的api#xff0c;程序可以使用这些接口与…本文总结如何在CentOS中安装Docker Engine
〇、Docker Engine 介绍
Docker Engine是一种开源容器化技术用于构建和容器化应用程序。Docker引擎作为一个客户端-服务器应用程序:
具有长时间运行守护进程的服务器。指定接口的api程序可以使用这些接口与Docker守护进程通信并向其发出指令。命令行接口(CLI)客户端docker。
CLI使用Docker api通过脚本或直接的CLI命令来控制Docker守护进程或与之交互。许多其他Docker应用程序使用底层API和CLI。守护进程创建和管理Docker对象如镜像、容器、网络和卷。
一、先决条件
1. 系统要求
要求CentOS版本为 CentOS 7/CentOS 8/CentOS 8 Stream/CentOS 9 Stream 要求centos-extras仓库配置开启默认是开启的 如果你的yum源有问题请参考 CentOS 执行yum命令报错【错误为仓库 ‘appstream‘ 下载元数据失败: …】
如下是CentOS8中的CentOS-Linux-Extras.repo要求enabled1
[rootGC yum.repos.d]# cat /etc/yum.repos.d/CentOS-Linux-Extras.repo
# CentOS-Linux-Extras.repo
# ...[extras]
nameCentOS Linux $releasever - Extras
#mirrorlisthttp://mirrorlist.centos.org/?release$releaseverarch$basearchrepoextrasinfra$infra
baseurlhttps://mirrors.aliyun.com/centos-vault/8.4.2105/extras/$basearch/os/
gpgcheck1
enabled1
gpgkeyfile:///etc/pki/rpm-gpg/RPM-GPG-KEY-centosofficial2. 卸载旧版本
卸载旧版本的docker or docker-engine如果你使用的是新安装的CentOS可以忽略该步骤
执行如下命令进行卸载
sudo yum remove docker \docker-client \docker-client-latest \docker-common \docker-latest \docker-latest-logrotate \docker-logrotate \docker-engine示例root用户无需加sudo
[rootGC ~]# yum remove docker \docker-client \docker-client-latest \docker-common \docker-latest \docker-latest-logrotate \docker-logrotate \docker-engine
Failed to set locale, defaulting to C.UTF-8
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
No packages marked for removal.
Dependencies resolved.
Nothing to do.
Complete!
[rootGC ~]因为我是新安装的所以No packages marked for removal
二、安装 Docker Engine
安装Docker Engine的方式有多种本文使用Docker仓库安装
1. 设置Docker仓库
sudo yum install -y yum-utils
sudo yum-config-manager --add-repo https://download.docker.com/linux/centos/docker-ce.repo安装yum-utils包然后使用该包下的yum-config-manager命令配置Docker仓库
2. 安装Docker引擎
安装最新版本的Docker Engine、containerd、 Docker Compose等
sudo yum install docker-ce docker-ce-cli containerd.io docker-buildx-plugin docker-compose-plugin3. 启动docker
sudo systemctl start docker如果你使用systemctl命令报错请参考 使用systemctl命令报错:System has not been booted with systemd as init system (PID 1). Can‘t operate.
4. 验证docker安装是否成功
sudo docker run hello-world如下可正常运行hello-world表示安装成功了。
[rootGC ~]# docker run hello-world
Unable to find image hello-world:latest locally
latest: Pulling from library/hello-world
719385e32844: Pull complete
Digest: sha256:dcba6daec718f547568c562956fa47e1b03673dd010fe6ee58ca806767031d1c
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 Ubuntu container with:$ docker run -it ubuntu 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/[rootGC ~]#三、卸载Docker
如果你需要卸载Docker可以参考如下命令
sudo yum remove docker-ce docker-ce-cli containerd.io docker-buildx-plugin docker-compose-plugin docker-ce-rootless-extras上述命令不会删除images、containers、volumes等数据 你可以再执行如下命令进行删除
sudo rm -rf /var/lib/docker
sudo rm -rf /var/lib/containerd参考资料 Install Docker Engine on CentOS
