Dockerfile应用、私有仓库

墨染默笙2024-08-28 17:25

通过dockerfile创建⼀个在启动容器时，就可以启动httpd服务的镜
像
步骤

  1. 创建⼀个⽬录，⽤于存储Docker file所使⽤的⽂件

  2. 在此⽬录中创建Docker file⽂件，以及镜像制作所使⽤的⽂件

  3. 使⽤docker build创建镜像

  4. 使⽤创建的镜像启动容器（验证）
    思考

  5. 基础镜像

  6. yum -y install httpd

  7. 使⽤脚本启动服务（httpd -k start）

  8. 应该将httpd服务放在前端执⾏

  9. 暴露端⼝ 80/tcp

  10. 添加⼀个测试⽂件，⽤于验证软件是否可⽤
    过程

    1.创建⽬录

    [root@docker001 ~]# mkdir test

    2.跳转到⽬录中

    [root@docker001 ~]# cd test/

    3.编辑启动脚本

    [root@docker001 test]# vim start.sh
    [root@docker001 test]# cat start.sh
    ######################################
    #!/bin/bah
    rm -rf /run/httpd/*
    exec /sbin/httpd -D FOREGROUND
    ######################################

    4.编辑index.html⽂件

    [root@docker001 test]# vim index.html

    5.编辑Dockerfile

    [root@docker001 test]# vim Dockerfile
    ####################################
    FROM centos_yum:v0
    MAINTAINER "httpd server start
    15773141955@163.com"
    RUN yum clean all
    RUN yum makecache
    RUN yum -y install httpd
    ADD start.sh /start.sh
    RUN chmod -v +x /start.sh
    Add index.html /var/www/html/
    EXPOSE 80
    WORKDIR /
    CMD ["/bin/bash","/start.sh"]
    ####################################

    6.创建镜像

    [root@docker001 test]# docker build -t
    centos:httpd .
    [+] Building 51.6s (12/12) FINISHED
    docker:default
    => [internal] load build definition from
    Dockerfile
    0.0s
    => => transferring dockerfile: 309B
    0.0s
    => [internal] load metadata for
    docker.io/library/centos_yum:v0
    0.0s
    => [internal] load .dockerignore
    0.0s
    => => transferring context: 2B
    0.0s
    => [1/8] FROM docker.io/library/centos_yum:v0
    0.0s
    => [internal] load build context
    0.0s
    => => transferring context: 180B
    0.0s
    => [2/8] RUN YUM clean all
    2.3s
    => [3/8] RUN YUM makecache
    42.7s
    => [4/8] RUN YUM -y install httpd
    5.8s
    => [5/8] ADD START.SH /START.SH
    0.0s
    => [6/8] RUN CHMOD -v +x /start.sh
    0.2s
    => [7/8] ADD INDEX.HTML /VAR/WWW/HTML/
    0.0s
    => exporting to image
    0.5s
    => => exporting layers
    0.4s
    => => writing image
    sha256:a488bc9f4cfb58a91baa57c2ab9faf615d457ff8714
    e4e958e7220a253469ed 0.0s
    => => naming to docker.io/library/centos:httpd

    7.查看镜像

    [root@docker001 test]# docker image ls
    REPOSITORY TAG IMAGE ID CREATED
    SIZE
    centos httpd a488bc9f4cfb About a
    minute ago 352MB
    centos nginx 12fea1b890de 41 hours ago
    366MB
    centos java17 b6bf774de7bb 41 hours ago
    550MB
    centos_yum v0 191d9c84f461 2 days ago
    260MB
    mysql latest a82a8f162e18 4 weeks ago
    586MB

    9.创建容器测试

    [root@docker001 test]# docker run -d --name c0
    centos:httpd
    c245d9f9f3e0d6526d80e117ebd7b4c2870a1e12558192f1da
    1e681cabdc4e87
    [root@docker001 test]# docker ps --all
    CONTAINER ID IMAGE COMMAND
    CREATED STATUS PORTS
    NAMES
    c245d9f9f3e0 centos:httpd "/bin/bash
    /start.sh" 21 seconds ago Up 20 seconds
    80/tcp c0

    10.查看ip地址

    [root@docker001 test]# docker inspect c0

    访问测试

    [root@docker001 test]# curl 172.17.0.2
    p
    pp
    ppp
    pppp
    ppppp
    pppppp
    ppppppp
    pppppppp

测试挂载其他项⽬

复制代码 
[root@docker001 test]# docker run -d -v
/opt:/var/www/html --name c1 centos:httpd
3c97af2d11a56b9c2f2ea4eb6bb0a7ff18d6f26d0f777f68a4
eb4a20b9c61835
[root@docker001 test]# eche
"adsfadfafwqrdfqdsafdgdfsgda" > /opt/index.html
-bash: eche: 未找到命令
[root@docker001 test]# echo
"adsfadfafwqrdfqdsafdgdfsgda" > /opt/index.html
[root@docker001 test]# curl 172.17.0.3
adsfadfafwqrdfqdsafdgdfsgda
yum -y install yum-plugin-ovl

练习 配置nginx应⽤镜像

复制代码 
FROM centos:latest
MAINTAINER "NGINX"
RUN rm -rf /etc/yum.repos.d/*
RUN curl -o /etc/yum.repos.d/CentOS-Base.repo
https://mirrors.aliyun.com/repo/Centos-vault-
8.5.2111.repo
RUN yum clean all && yum makecache
RUN yum -y install epel-release && yum -y
install nginx
RUN echo "daemon off;" >> /etc/nginx/nginx.conf
WORKDIR /
CMD /usr/sbin/nginx
[root@docker001 ~]# docker run -d --name c1 -
p80:80 -v /opt/:/usr/share/nginx/html/
centos:nginx
948f20e1ed4758e78759de8f9ce9b34a7f44c431bc8ead75b6
70e1a5b488654c

创建私有仓库,在企业中分享项⽬

复制代码 
# 安装仓库镜像
[root@docker001 ~]# docker pull registry
Using default tag: latest
latest: Pulling from library/registry
930bdd4d222e: Pull complete
a15309931e05: Pull complete
6263fb9c821f: Pull complete
86c1d3af3872: Pull complete
a37b1bf6a96f: Pull complete
Digest:
sha256:12120425f07de11a1b899e418d4b0ea174c8d4d572d
45bdb640f93bc7ca06a3d
Status: Downloaded newer image for registry:latest
docker.io/library/registry:latest
#查看新安装的镜像
[root@docker001 ~]# docker images
REPOSITORY TAG IMAGE ID CREATED 
 SIZE
registry latest cfb4d9904335 10 months
ago 25.4MB
centos latest 5d0da3dc9764 2 years ago
 231MB
# 创建挂载的⽬录
[root@docker001 ~]# mkdir /opt/dockeregistry
# 创建容器，映射端⼝，挂载⽂件
[root@docker001 ~]# docker run -d --name c1 -
p5000:5000 -v
/opt/dockeregistry/:/var/lib/registry
registry:latest
7ec28de22490aee02bd542ef22076f8ba746f7513cf96bf501
d817bc07b38f27
[root@docker001 ~]# docker ps
CONTAINER ID IMAGE COMMAND 
 CREATED STATUS PORTS 
 NAMES
7ec28de22490 registry:latest "/entrypoint.sh
/etc..." 13 seconds ago Up 12 seconds 
0.0.0.0:5000->5000/tcp, :::5000->5000/tcp c1
# 访问⽬录⻚
[root@docker001 ~]# curl
http://10.1.1.50:5000/v2/_catalog
{"repositories":[]}
# 创建仓库
[root@docker001 ~]# vim /etc/docker/daemon.json
[root@docker001 ~]# cat /etc/docker/daemon.json
{
 "insecure-registries":[
 "http://10.1.1.50:5000" 
 ],
 "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"
 ],
 
 "hosts": [
 "tcp://0.0.0.0:2375",
 "unix:///var/run/docker.sock"
 ]
 
}
# 重启docker服务
[root@docker001 ~]# systemctl restart
docker.service
# 查看镜像
[root@docker001 ~]# docker images
REPOSITORY TAG IMAGE ID CREATED 
 SIZE
registry latest cfb4d9904335 10 months
ago 25.4MB
centos latest 5d0da3dc9764 2 years ago
 231MB
# 为要上传的镜像添加标记
[root@docker001 ~]# docker tag centos:latest
10.1.1.50:5000/centos:v0
[root@docker001 ~]# docker images
REPOSITORY TAG IMAGE ID 
CREATED SIZE
registry latest cfb4d9904335 
10 months ago 25.4MB
10.1.1.50:5000/centos v0 5d0da3dc9764 2
years ago 231MB
centos latest 5d0da3dc9764 2
years ago 231MB
10.1.1.50/centos v0 5d0da3dc9764 2
years ago 231MB
[root@docker001 ~]# docker push
10.1.1.50:5000/centos:v0
The push refers to repository
[10.1.1.50:5000/centos]
Get "http://10.1.1.50:5000/v2/": dial tcp
10.1.1.50:5000: connect: connection refused
[root@docker001 ~]# docker start c1
c1
[root@docker001 ~]# docker ps
CONTAINER ID IMAGE COMMAND 
 CREATED STATUS PORTS 
 NAMES
7ec28de22490 registry:latest "/entrypoint.sh
/etc..." 16 minutes ago Up 4 seconds 
0.0.0.0:5000->5000/tcp, :::5000->5000/tcp c1
[root@docker001 ~]# docker push
10.1.1.50:5000/centos:v0
The push refers to repository
[10.1.1.50:5000/centos]
74ddd0ec08fa: Pushed
v0: digest:
sha256:a1801b843b1bfaf77c501e7a6d3f709401a1e0c8386
3037fa3aab063a7fdb9dc size: 529
[root@docker001 ~]# ls /opt/
1.png assets dist 
index.html
2.png containerd dockeregistry 
nohup.out
application.properties cvloume favicon.ico 
Project_ExamSystem-V1.0.0.war
[root@docker001 ~]# ls /opt/dockeregistry/
docker
[root@docker001 ~]# ls /opt/dockeregistry/docker/
registry
[root@docker001 ~]# ls
/opt/dockeregistry/docker/registry/
v2
[root@docker001 ~]# ls
/opt/dockeregistry/docker/registry/v2/
blobs repositories
[root@docker001 ~]# ls
/opt/dockeregistry/docker/registry/v2/repositories
/
centos
[root@docker001 ~]#

1.拉取registry

复制代码 
docker pull registry

2.创建挂载⽬录

复制代码 
mkdir /regist

3.启动容器，映射端⼝，挂载⽬录

复制代码 
docker run -d --name c0 -v
/regist/:/var/lib/rigistry/ -p5000:5000
registry:latest

4.访问仓库

复制代码 
curl http://192.168.71.50:5000/v2/_catelog

5.配置pull和push，修改daemon.json

复制代码 
vim /etc/docker/daemon.json
{
 .....,
 "insecure-registries":[
 "http://192.168.71.50:5000"
 ]
}
:wq

6.修改了配置⽂件，重启docker服务

复制代码 
systemctl restart docker

7.启动registry容器

复制代码 
docker start r1
curl localhost:5000/v2/_catalog
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