课程第34次docker

botang

安装Docker:

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

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1. yum-config-manager --add-repo https://download1.rpmfusion.org/free/el/updates/7/x86_64/

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还是在报container-selinux版本低于2.9的错误：
rpm.pbone.net去搜索container-selinux这个包：


rpm -ivh  container-selinux...rpm

1. systemctl enable docker
   
2. systemctl start docker

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在文件系统任何地方创建一个文件夹：hello_world
在hello_world里面，写以下文件

Dockerfile文件的内容：

1. FROM ph</p><p>p:7.3.6-apache
   
2. COPY . /var/www/html
   
3. EXPOSE 80
   

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以php为例，准备一个要测试或者编写的php文件：
index.php:

1. <?php
   
2. 
   
3. echo "Hello World Botang";
   

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1. [root@server3 hello_world]# docker build   ./   -t hello_world
   
2. Sending build context to Docker daemon  3.072kB
   
3. Step 1/3 : FROM php:7.3.6-apache
   
4. 7.3.6-apache: Pulling from library/php
   
5. fc7181108d40: Pull complete
   
6. 0e65236fc68a: Pull complete
   
7. 657b7ad8209d: Pull complete
   
8. fe9abd6f2547: Pull complete
   
9. 3f3b3b58af14: Pull complete
   
10. 6c87b44c0319: Pull complete
    
11. 879171658515: Pull complete
    
12. 29c3b2e8a58a: Pull complete
    
13. c3a25239431e: Pull complete
    
14. f297f66a8e1d: Pull complete
    
15. 702f5011adeb: Pull complete
    
16. ea31bc27c1fb: Pull complete
    
17. ad44f5a21cda: Pull complete
    
18. Digest: sha256:7fcbf93d7edfe3b524794b4ee9dfa05d973164af0fd233dd8ded7d75ad3dcf99
    
19. Status: Downloaded newer image for php:7.3.6-apache
    
20. ---> e7d20afcec95
    
21. Step 2/3 : COPY .  /var/www/html
    
22. ---> 9f44c1d7f18a
    
23. Step 3/3 : EXPOSE 80
    
24. ---> Running in 766f55b5ddb0
    
25. Removing intermediate container 766f55b5ddb0
    
26. ---> e0ddd16728ee
    
27. Successfully built e0ddd16728ee
    
28. Successfully tagged hello_world:latest
    
29. [root@server3 hello_world]#
    

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运行docker:

1. [root@server3 hello_world]# docker run -p 80:80 hello_world

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但是网页改动后，它不会生效， 改成以下这样才更灵活：

1. [root@server3 hello_world]# docker run -p 80:80   -v  /root/hello_world/:/var/www/html/ hello_world

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Docker维护命令：

1. [root@server3 ~]# docker images
   
2. REPOSITORY          TAG                 IMAGE ID            CREATED             SIZE
   
3. hello_world         latest              d8da4120df72        9 hours ago         378MB
   
4. php                 7.3.6-apache        e7d20afcec95        2 days ago          378MB
   
5. [root@server3 ~]# docker rmi d8da4120df72
   
6. Error response from daemon: conflict: unable to delete d8da4120df72 (must be forced) - image is being used by stopped container 3ab31ea2dae1
   
7. [root@server3 ~]# docker rm 3ab31ea2dae1
   
8. 3ab31ea2dae1
   
9. [root@server3 ~]# docker rmi d8da4120df72
   
10. Untagged: hello_world:latest
    
11. Deleted: sha256:d8da4120df7281f10cac698f14b25709d50084e4bd5d47b6b80dde3673d54512
    
12. Deleted: sha256:978cb469a1a5f2efbe96e5987efdc96c02a7b97e6d43d53358c6c7baa6a57c10
    
13. Deleted: sha256:b4439c64ff9bc5e5d9608a75ab024a19d91b7d3e2e83d76d22af86777d93cb5f
    
14. [root@server3 ~]# docker images
    
15. REPOSITORY          TAG                 IMAGE ID            CREATED             SIZE
    
16. php                 7.3.6-apache        e7d20afcec95        2 days ago          378MB
    
17. [root@server3 ~]# docker rmi e7d20afcec95
    
18. Untagged: php:7.3.6-apache
    
19. Untagged: php@sha256:7fcbf93d7edfe3b524794b4ee9dfa05d973164af0fd233dd8ded7d75ad3dcf99
    
20. Deleted: sha256:e7d20afcec952b057a087b4010efd930db2ab9eef8b24934fd6951319f149317
    
21. Deleted: sha256:f8d13261fecabf2675329da3a87a3cb34a889d14bf21a1cb971b31c038768df2
    
22. Deleted: sha256:f5203bab8d1e014855206d5625c900a8ac51139539930c47fa6501653d23d64f
    
23. Deleted: sha256:8403100eb9023d562ab752c57859adc29621ba05a164b66e81e8f91d5b7ed234
    
24. Deleted: sha256:7945c278f756bbb73680d3d31d352fc14e3fb0b9786641fa111b5f9ee47279f7
    
25. Deleted: sha256:56eaca81820c4640db1272aa5549fe92905cc4a12e578ceac9ecae4e37dfaa49
    
26. Deleted: sha256:f80fab9911dbb15595d9fb9047a50d49f8f754cee26dc8af2a9019080fca4813
    
27. Deleted: sha256:8f7d2ece04c2c89716da8d613f389d5e0c9ecd1f33aaa681b10362e1534374ea
    
28. Deleted: sha256:504256e55285662f1ba462d602356eda40576e30921a17422fdb098fc897f1a1
    
29. Deleted: sha256:3bcf4d71f6c0ed0725e7889ba3bc99acf408006cab5a982726e9e17e87650971
    
30. Deleted: sha256:796f5d40970c67dd60553847d8244c4de00f5a8616263eef5a4fd8449ff1c215
    
31. Deleted: sha256:29960b33853b9f26e7dfe186d785598fdde129204b2163d93c072d0916049ca5
    
32. Deleted: sha256:e05e97aed813fc99dec94b1cecc3ff3791e73a5dc40194b027b39f9648d029c6
    
33. Deleted: sha256:cf5b3c6798f77b1f78bf4e297b27cfa5b6caa982f04caeb5de7d13c255fd7a1e
    
34. [root@server3 ~]# docker images
    
35. REPOSITORY          TAG                 IMAGE ID            CREATED             SIZE
    
36. [root@server3 ~]# docker ps
    
37. CONTAINER ID        IMAGE               COMMAND             CREATED             STATUS              PORTS               NAMES
    

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