docker run hello-world时超时告警

​ 跟着官方文档进行docker安装时，测试docker是否运行成功执行<code>docker run hello-world时，结果和别人的不一样

正常情况：

我们的：

<code>Unable to find image 'hello-world:latest' locally

latest: Pulling from library/hello-world

c1ec31eb5944: Retrying in 10 seconds

docker: error pulling image configuration: download failed after attempts=6: dial tcp 128.242.245.93:443: connect: connection refused.

See 'docker run --help'.

原因：就是我们的镜像源不行，需要更换镜像源

但是我们就算知道原因，去找度娘会发现大部分都是说更换阿里的镜像源，但是我们尝试之后并没有作用

常规方案没作用

#针对Docker客户端版本大于 1.10.0 的用户

#您可以通过修改daemon配置文件/etc/docker/daemon.json来使用加速器

sudo mkdir -p /etc/docker

sudo tee /etc/docker/daemon.json <<-'EOF'

{

"registry-mirrors": ["https://5nkcn10r.mirror.aliyuncs.com"]

}

EOF

sudo systemctl daemon-reload

sudo systemctl restart docker

2.1、解决方案

配置加速地址：设置registry mirror

sudo mkdir -p /etc/docker

sudo tee /etc/docker/daemon.json <<-'EOF'

{

"registry-mirrors": [

"https://do.nark.eu.org",

"https://dc.j8.work",

"https://docker.m.daocloud.io",

"https://dockerproxy.com",

"https://docker.mirrors.ustc.edu.cn",

"https://docker.nju.edu.cn"

]

}

EOF

sudo systemctl daemon-reload

sudo systemctl restart docker

systemctl status docker

重启完docker之后检查registry mirror刚刚配置的加速地址是否成功

[root@wzy1303 docker]# docker info

Client: Docker Engine - Community

Version: 26.1.4

Context: default

Debug Mode: false

Plugins:

buildx: Docker Buildx (Docker Inc.)

Version: v0.14.1

Path: /usr/libexec/docker/cli-plugins/docker-buildx

compose: Docker Compose (Docker Inc.)

Version: v2.27.1

Path: /usr/libexec/docker/cli-plugins/docker-compose

Server:

Containers: 1

Running: 0

Paused: 0

Stopped: 1

Images: 1

Server Version: 26.1.4

Storage Driver: overlay2

Backing Filesystem: xfs

Supports d_type: true

Using metacopy: false

Native Overlay Diff: true

userxattr: false

Logging Driver: json-file

Cgroup Driver: cgroupfs

Cgroup Version: 1

Plugins:

Volume: local

Network: bridge host ipvlan macvlan null overlay

Log: awslogs fluentd gcplogs gelf journald json-file local splunk syslog

Swarm: inactive

Runtimes: io.containerd.runc.v2 runc

Default Runtime: runc

Init Binary: docker-init

containerd version: d2d58213f83a351ca8f528a95fbd145f5654e957

runc version: v1.1.12-0-g51d5e94

init version: de40ad0

Security Options:

seccomp

Profile: builtin

Kernel Version: 3.10.0-1160.119.1.el7.x86_64

Operating System: CentOS Linux 7 (Core)

OSType: linux

Architecture: x86_64

CPUs: 8

Total Memory: 2.761GiB

Name: wzy1303

ID: 74efae68-ef43-45a9-b547-ffa2c3805423

Docker Root Dir: /var/lib/docker

Debug Mode: false

Username: inkling1303

Experimental: false

Insecure Registries:

127.0.0.0/8

Registry Mirrors:

https://do.nark.eu.org/

https://dc.j8.work/

https://docker.m.daocloud.io/

https://dockerproxy.com/

https://docker.mirrors.ustc.edu.cn/

https://docker.nju.edu.cn/

Live Restore Enabled: false

可以看到我们已经配置成功：

运行docker run hello-world,成功运行

<code>[root@wzy1303 docker]# docker run hello-world

Unable to find image 'hello-world:latest' locally

latest: Pulling from library/hello-world

c1ec31eb5944: Pull complete

Digest: sha256:53cc4d415d839c98be39331c948609b659ed725170ad2ca8eb36951288f81b75

Status: Downloaded newer image for hello-world:latest

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/

#查看是否成功拉取hello-world镜像

[root@wzy1303 docker]# docker images

REPOSITORY TAG IMAGE ID CREATED SIZE

hello-world latest d2c94e258dcb 15 months ago 13.3kB

[root@wzy1303 docker]# docker images -a

REPOSITORY TAG IMAGE ID CREATED SIZE

hello-world latest d2c94e258dcb 15 months ago 13.3kB

[root@wzy1303 docker]# docker images -aq

d2c94e258dcb