自从centos终止技术支持后，国内很多企业用rockylinux来代替Centos，如果我们在rockylinux上要安装docker，怎么操作呢，下面就是完全的答案。

第一步：先安装一些前置依赖包

dnf install -y yum-utils device-mapper-persistent-data lvm2

 

第二步：安装docker的在线安装源

yum-config-manager --add-repo https://download.docker.com/linux/centos/docker-ce.repo

 

第三步：安装最新版docker

dnf install -y docker-ce

只需要安装核心的docker-ce，它会自动分析软件包依赖，把docker-ce-cli containerd.io一并安装了

 

第四步：启动docker

systemctl start docker;systemctl enable docker
第五步：查看docker版本
# docker version
Client: Docker Engine - Community
Version: 26.1.3
API version: 1.45
Go version: go1.21.10
Git commit: b72abbb
Built: Thu May 16 08:34:39 2024
OS/Arch: linux/amd64
Context: default

Server: Docker Engine - Community
Engine:
Version: 26.1.3
API version: 1.45 (minimum version 1.24)
Go version: go1.21.10
Git commit: 8e96db1
Built: Thu May 16 08:33:34 2024
OS/Arch: linux/amd64
Experimental: false
containerd:
Version: 1.6.32
GitCommit: 8b3b7ca2e5ce38e8f31a34f35b2b68ceb8470d89
runc:
Version: 1.1.12
GitCommit: v1.1.12-0-g51d5e94
docker-init:
Version: 0.19.0
GitCommit: de40ad0
第六步：测试docker(拉取镜像)
# docker run docker.m.daocloud.io/hello-world

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/
第七步：优化docker拉取镜像
tee /etc/docker/daemon.json <<-'EOF'
{
    "registry-mirrors": [
    	"https://docker.m.daocloud.io",
    	"https://docker.imgdb.de",
    	"https://docker-0.unsee.tech",
    	"https://docker.hlmirror.com",
    	"https://docker.1ms.run",
    	"https://func.ink",
    	"https://lispy.org",
    	"https://docker.xiaogenban1993.com"
    ]
}
EOF
重启docker
systemctl daemon-reload && systemctl restart docker
再测试
# docker pull nginx
Using default tag: latest
latest: Pulling from library/nginx
6e909acdb790: Pull complete 
5eaa34f5b9c2: Pull complete 
417c4bccf534: Pull complete 
e7e0ca015e55: Pull complete 
373fe654e984: Pull complete 
97f5c0f51d43: Pull complete 
c22eb46e871a: Pull complete 
Digest: sha256:124b44bfc9ccd1f3cedf4b592d4d1e8bddb78b51ec2ed5056c52d3692baebc19
Status: Downloaded newer image for nginx:latest
docker.io/library/nginx:latest
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