docker基础3——自定义镜像、创建私有仓库、查看 docker 运行状态

柔情只为你懂 2022-05-06 06:52 88阅读 0赞

# 一、自定义镜像 #

## 1，案例1 ##

要求：请自定义一个 docker 镜像，基于 hub.c.163.com/library/centos，要求创建出来的镜像在生成容器的时候，可以直接使用 ifconfig 命令  
自定义镜像,输入 vim Dockerfile：

RUN rpm --import  
FROM hub.c.163.com/library/centos  
MAINTAINER suyunanyan  
RUN rpm --import/etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-\*  
RUN yum install net-tools -y  
CMD \["/bin/bash"\]

![70][]

运行：-t 后面是自定义镜像的名称 .表示当前目录 Dockerfile

docker build -t centos .

![70 1][]

docker查看images：

![70 2][]

测试这个镜像：

\--rm 表示退出后自动删除

![70 3][]

退出后，docker ps -a | grep centos ，没有之前的centos了：

![70 4][]

## 2，案例2 ##

要求：通过自定义安装nginx，是的本地的index.html作为Nginx默认访问页面

安装 epel.repo：

yum install \*epel\* -y

查看

ls /etc/yum.repos.d/

![70 5][]

拷贝 epel.repo 到当前目录

cp /etc/yum.repos.d/epel.repo epel.repo

新建 index.html

echo 'hello docker!!!' > index.html

vim Dockerfile

输入：

RUN rpm --import  
FROM hub.c.163.com/library/centos  
MAINTAINER suyunnanyan  
RUN rpm --import /etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-\*  
ADD epel.repo /etc/yum.repos.d/  
RUN yum install net-tools nginx -y  
RUN rm -rf /usr/share/nginx/html/  
ADD index.html /usr/share/nginx/html/  
CMD \["nginx", "-g","daemon off;"\]

![70 6][]

创建镜像：

docker build -t nginx .

运行镜像：

docker run -dit --rm -p 80:80 nginx

![70 7][]

访问该服务：

![70 8][]

## 二、创建私有仓库 ##

docker pull hub.c.163.com/library/registry:latest

运行registry镜像：

docker run -dit --name=r\_hub -p 5000:5000 -v /home/docker/registry:/var/lib/registry hub.c.163.com/library/registry

docker ps | grep regi

![70 9][]

在 192.168.222.151 虚拟机上运行命令

docker pull redis

docker tag docker.io/redis 192.168.222.151:5000/gzuni/redis

推送

docker push 192.168.222.151:5000/gzuni/redis

![70 10][]

为什么会推送失败？因为推送用的是https，修改设置：

vim /etc/docker/daemon.json

![70 11][]

重启docker：

systemctl restart docker

再次推送：

docker push 192.168.222.151:5000/gzuni/redis

![70 12][]

查看本地仓库：

curl -XGET [http://192.168.222.151:5000/v2/\_catalog][http_192.168.222.151_5000_v2_catalog]

![70 13][]

查看tags：

curl -XGET [http://192.168.222.151:5000/v2/gzuni/redis/tags/list][http_192.168.222.151_5000_v2_gzuni_redis_tags_list]

![70 14][]

删除本地镜像：

docker rmi -f docker.io/redis

![70 15][]

从本地仓库下载

docker pull 192.168.222.151:5000/gzuni/redis:latest

![70 16][]

![70 17][]

仓库中删除镜像

curl [https://raw.githubusercontent.com/burnettk/delete-docker-registry-image/master/delete\_docker\_registry\_image.py][https_raw.githubusercontent.com_burnettk_delete-docker-registry-image_master_delete_docker_registry_image.py] | sudo tee /usr/local/bin/delete\_docker\_registry\_image >/dev/null chmod a+x /usr/local/bin/delete\_docker\_registry\_image

设置仓库目录：

export REGISTRY\_DATA\_DIR=/home/docker/registry/docker/registry/v2

输入删除命令：

/usr/local/bin/delete\_docker\_registry\_image gzuni/redis:latest

# 三、查看 docker 运行状态 #

docker stats

![70 18][]

查看操作系统

free -m

![70 19][]

限制内存运行

docker run -it --rm -m 200M centos

设置 cpu 亲和性

docker run -it --rm --name=c1 --cpuset-cpus=1 centos

docker 监控

docker pull hub.c.163.com/xbingo/cadvisor:latest

docker run -v /var/run:/var/run -v /sys:/sys:ro -v /var/lib/docker:/var/lib/docker:ro -d -p 8080:8080 --name=mon hub.c.163.com/xbingo/cadvisor:latest

浏览器输入[http://192.168.222.151:8080/containers/][http_192.168.222.151_8080_containers] ：

![70 20][]

![70 21][]

[70]: /images/20220506/a375e6fff00f42c69b89f0dd2c592579.png
[70 1]: /images/20220506/86adebffcb0c46b4992fcc8f2415b43d.png
[70 2]: /images/20220506/8b3bab5e90d94f38be2e1464d5e72dff.png
[70 3]: /images/20220506/2ffba96a83de41a288831c16661d086d.png
[70 4]: /images/20220506/64f24b1dc7ce4137b14365ca3db1f6e8.png
[70 5]: /images/20220506/9c171bedcea54be28aef00f8961ffaec.png
[70 6]: /images/20220506/d0e9843818b94dcfbacbd97c93634e3e.png
[70 7]: /images/20220506/90af4644e26a438185435e0bb93e359d.png
[70 8]: /images/20220506/91505eb869614e41a10d5e971989fc95.png
[70 9]: /images/20220506/a09b133cc32d4289b63c438df2783a37.png
[70 10]: /images/20220506/915c96bc47774d669306bb3d8e67dddc.png
[70 11]: /images/20220506/f4e7c75f7d624eeba08a3e55d3bb2b54.png
[70 12]: /images/20220506/819a3c03754a49399a506034222cbb99.png
[http_192.168.222.151_5000_v2_catalog]: http://192.168.222.151:5000/v2/_catalog
[70 13]: /images/20220506/e87c8d5eb73e4c81ab2a1ca53f488132.png
[http_192.168.222.151_5000_v2_gzuni_redis_tags_list]: http://192.168.222.151:5000/v2/gzuni/redis/tags/list
[70 14]: /images/20220506/c081db997c5c407a9ef365e037eee896.png
[70 15]: /images/20220506/8ea5246d65cd4f4db5bd9215053e9404.png
[70 16]: /images/20220506/97b79afbc0234fa18e1ee578928535e6.png
[70 17]: /images/20220506/db3a617fedff4cb0a6df89520f4683d0.png
[https_raw.githubusercontent.com_burnettk_delete-docker-registry-image_master_delete_docker_registry_image.py]: https://raw.githubusercontent.com/burnettk/delete-docker-registry-image/master/delete_docker_registry_image.py
[70 18]: /images/20220506/15b1dc1364074401bc57c3f757e6ed95.png
[70 19]: /images/20220506/94d13ad033cd4aa499e57128aa22370a.png
[http_192.168.222.151_8080_containers]: http://192.168.222.151:8080/containers/
[70 20]: /images/20220506/0765ca9c4192486384e7195932daf49f.png
[70 21]: /images/20220506/eab17bef3a3a4b569191fa303c6e4b5a.png