docker学习记录：commit，制作自己的镜像

1.清除所有

kt@kt-SYS-4028GR-TR2:~$ sudo docker rm -f $(sudo docker ps -aq)

2.再操作一次tomcat,修改好，再打成一外镜像

kt@kt-SYS-4028GR-TR2:~$ sudo docker images
REPOSITORY      TAG       IMAGE ID       CREATED       SIZE
tomcat          9.0       39642322f89a   3 weeks ago   469MB
tomcat          latest    f62f518e5c5c   3 weeks ago   467MB
mongo           latest    f08e39122805   4 weeks ago   855MB
kibana          7.17.26   86125e209614   4 weeks ago   866MB
nginx           latest    f876bfc1cc63   5 weeks ago   192MB
centos          latest    5d0da3dc9764   3 years ago   231MB
elasticsearch   6.4.0     1ac676545731   6 years ago   791MB

kt@kt-SYS-4028GR-TR2:~$ sudo docker run  -it --name mytomcat -p 8080:8080 tomcat:9.0

3.修改记录

root@d05e50e4bcde:/usr/local/tomcat/webapps.dist# ls
docs  examples  host-manager  manager  ROOT
root@d05e50e4bcde:/usr/local/tomcat/webapps.dist# cp . ../webapps
cp: -r not specified; omitting directory '.'
root@d05e50e4bcde:/usr/local/tomcat/webapps.dist# cp -r . ../webapps
root@d05e50e4bcde:/usr/local/tomcat/webapps.dist# ls
docs  examples  host-manager  manager  ROOT
root@d05e50e4bcde:/usr/local/tomcat/webapps.dist# cd ../webapps
root@d05e50e4bcde:/usr/local/tomcat/webapps# ls
docs  examples  host-manager  manager  ROOT
root@d05e50e4bcde:/usr/local/tomcat/webapps# cd ..
root@d05e50e4bcde:/usr/local/tomcat# cp -r ./webapps.dist/* ./webapps/

4.结果

5.生成修改后的镜像，然后查看。

kt@kt-SYS-4028GR-TR2:~$ sudo docker ps -a
[sudo] password for kt: 
CONTAINER ID   IMAGE        COMMAND             CREATED          STATUS          PORTS                                       NAMES
d05e50e4bcde   tomcat:9.0   "catalina.sh run"   40 minutes ago   Up 40 minutes   0.0.0.0:8080->8080/tcp, :::8080->8080/tcp   mytomcat
kt@kt-SYS-4028GR-TR2:~$ docker commit --help

Usage:  docker commit [OPTIONS] CONTAINER [REPOSITORY[:TAG]]

Create a new image from a container's changes

Aliases:
  docker container commit, docker commit

Options:
  -a, --author string    Author (e.g., "John Hannibal Smith <hannibal@a-team.com>")
  -c, --change list      Apply Dockerfile instruction to the created image
  -m, --message string   Commit message
  -p, --pause            Pause container during commit (default true)
kt@kt-SYS-4028GR-TR2:~$ sudo docker commit -a="duyicheng" -m="success" d05e50 mytomcat:1.0
sha256:bbdd452936a3063cd369cf12e685ca39df828dae830e44eba9c7bd1d4b418b54
kt@kt-SYS-4028GR-TR2:~$ sudo docker images
REPOSITORY      TAG       IMAGE ID       CREATED          SIZE
mytomcat        1.0       bbdd452936a3   40 seconds ago   475MB
tomcat          9.0       39642322f89a   3 weeks ago      469MB
tomcat          latest    f62f518e5c5c   3 weeks ago      467MB
mongo           latest    f08e39122805   4 weeks ago      855MB
kibana          7.17.26   86125e209614   4 weeks ago      866MB
nginx           latest    f876bfc1cc63   5 weeks ago      192MB
centos          latest    5d0da3dc9764   3 years ago      231MB
elasticsearch   6.4.0     1ac676545731   6 years ago      791MB
kt@kt-SYS-4028GR-TR2:~$

6.查看物理位置。

sudo docker inspect mytomcat:1.0

"GraphDriver": {
"Data": {
"LowerDir": "/var/lib/docker/overlay2/f800a777d89a26315ad30abc4397d29e9e3b1677f0395fa86569b264583a934c/diff:/var/lib/docker/overlay2/08f1074187cbe909153e9893fec1ee159580d4d13012136e47ea417fe6b3ab0d/diff:/var/lib/docker/overlay2/55d33ae1e59adc27089cbb89a7ed199017cccfb0d9ff137eff2a898cebe96245/diff:/var/lib/docker/overlay2/81b65dd56867a6f12ac898418665da498534a96c8908325d255a253de2b7ba05/diff:/var/lib/docker/overlay2/96ca15bd1eda45e81e83004abc0ebd23e4e8c9698fa7345e2d326bcde2d79f5b/diff:/var/lib/docker/overlay2/fee692308edc75f2740372f33c711467a7cf85e33918849ebdd28b57e4eb054b/diff:/var/lib/docker/overlay2/c96832cfc82240a61fdc4ab75eae2d2b443faec05c6e6e246b06affb04c35a1d/diff:/var/lib/docker/overlay2/987581c31599aea072710ccdfece9e7d9d91f278a8d84b9b2ca05b1e342d26cc/diff:/var/lib/docker/overlay2/a85c349db1492490f6d61aeb5de43a3a1900c5f95a99db8f825fe981ece2d116/diff",

1.如果你想要将 Docker 镜像 mytomcat 复制给别人使用，最直接的方法是将镜像导出为一个 tar 文件，然后将该文件提供给他人。以下是如何导出 Docker 镜像的步骤：

-o 选项指定输出文件的名称。• mytomcat:1.0 是要导出的镜像名称和标签。

kt@kt-SYS-4028GR-TR2:~$ sudo docker save -o mytomcat.tar mytomcat:1.0
kt@kt-SYS-4028GR-TR2:~$

2. 检查导出的文件：
确认导出的 tar 文件已经生成在当前目录中：

kt@kt-SYS-4028GR-TR2:~$ ls -lh mytomcat.tar
-rw------- 1 root root 459M Jan  6 16:25 mytomcat.tar
kt@kt-SYS-4028GR-TR2:~$

将 tar 文件提供给他人• 通过文件传输工具：你可以使用文件传输工具（如 FTP、SFTP、Dropbox、Google Drive 等）将 mytomcat.tar 文件发送给他人。• 通过物理介质：如果对方在同一地点，你也可以将文件复制到 USB 驱动器等物理介质中，然后交给对方。对方如何导入镜像对方收到 mytomcat.tar 文件后，可以使用以下命令将 tar 文件导入为 Docker 镜像：

sudo docker load -i mytomcat.tar

• -i 选项指定输入文件的路径。导入后，对方可以使用 docker images 命令查看导入的镜像，并使用 docker run 命令运行该镜像。通过这些步骤，你可以轻松地将 Docker 镜像 mytomcat 导出为一个文件，并提供给他人使用。

操作记录：

kt@kt-SYS-4028GR-TR2:~$ sudo docker save -o mytomcat.tar mytomcat:1.0
kt@kt-SYS-4028GR-TR2:~$ ls -lh mytomcat.tar
-rw------- 1 root root 459M Jan  6 16:25 mytomcat.tar
kt@kt-SYS-4028GR-TR2:~$ sudo images
sudo: images: command not found
kt@kt-SYS-4028GR-TR2:~$ sudo docker images
REPOSITORY      TAG       IMAGE ID       CREATED          SIZE
mytomcat        1.0       bbdd452936a3   16 minutes ago   475MB
tomcat          9.0       39642322f89a   3 weeks ago      469MB
tomcat          latest    f62f518e5c5c   3 weeks ago      467MB
mongo           latest    f08e39122805   4 weeks ago      855MB
kibana          7.17.26   86125e209614   4 weeks ago      866MB
nginx           latest    f876bfc1cc63   5 weeks ago      192MB
centos          latest    5d0da3dc9764   3 years ago      231MB
elasticsearch   6.4.0     1ac676545731   6 years ago      791MB
kt@kt-SYS-4028GR-TR2:~$ sudo docker rmi -f mytomcat:1.0
Untagged: mytomcat:1.0
Deleted: sha256:bbdd452936a3063cd369cf12e685ca39df828dae830e44eba9c7bd1d4b418b54
Deleted: sha256:0eeded58289b01f46268c3f1823056cc361033853c54b9bdf3fbc4439b68573f
kt@kt-SYS-4028GR-TR2:~$ sudo docker images
REPOSITORY      TAG       IMAGE ID       CREATED       SIZE
tomcat          9.0       39642322f89a   3 weeks ago   469MB
tomcat          latest    f62f518e5c5c   3 weeks ago   467MB
mongo           latest    f08e39122805   4 weeks ago   855MB
kibana          7.17.26   86125e209614   4 weeks ago   866MB
nginx           latest    f876bfc1cc63   5 weeks ago   192MB
centos          latest    5d0da3dc9764   3 years ago   231MB
elasticsearch   6.4.0     1ac676545731   6 years ago   791MB
kt@kt-SYS-4028GR-TR2:~$ sudo docker load -i mytomcat.tar
546175e87c0f: Loading layer  6.714MB/6.714MB
Loaded image: mytomcat:1.0
kt@kt-SYS-4028GR-TR2:~$ sudo docker images
REPOSITORY      TAG       IMAGE ID       CREATED          SIZE
mytomcat        1.0       bbdd452936a3   17 minutes ago   475MB
tomcat          9.0       39642322f89a   3 weeks ago      469MB
tomcat          latest    f62f518e5c5c   3 weeks ago      467MB
mongo           latest    f08e39122805   4 weeks ago      855MB
kibana          7.17.26   86125e209614   4 weeks ago      866MB
nginx           latest    f876bfc1cc63   5 weeks ago      192MB
centos          latest    5d0da3dc9764   3 years ago      231MB
elasticsearch   6.4.0     1ac676545731   6 years ago      791MB
kt@kt-SYS-4028GR-TR2:~$

先建，后删除，然后再加载。

再删除本地的。

kt@kt-SYS-4028GR-TR2:~$ ls
 anaconda3                              Documents   kibana-config   mytomcat.tar   snap        下载
'Clash for Windows-0.20.16-x64-linux'   Downloads   kibana.yml      Pictures       Templates
 Desktop                                gitee       Music           Public         Videos
kt@kt-SYS-4028GR-TR2:~$ sudo rm mytomcat.tar
kt@kt-SYS-4028GR-TR2:~$ ls
 anaconda3                              Documents   kibana-config   Pictures   Templates
'Clash for Windows-0.20.16-x64-linux'   Downloads   kibana.yml      Public     Videos
 Desktop                                gitee       Music           snap       下载
kt@kt-SYS-4028GR-TR2:~$

此过程仅记录。

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