7. 初始Dockerfile

7.1 什么是DockerFile

是一个用来构建docker镜像的脚本，命令脚本！
通过这个脚本可以生成镜像，每个命令都是一层。

7.2 编写Dockerfile

FROM centos
VOLUME [ "/volume01","/volume02" ]
CMD echo "------end------"
CMD /bin/bash

7.3 通过Dockerfile生成镜像

╰─ docker build -f ~/Public/docker-test-volume/Dockerfile -t lbxlh/centos .
[+] Building 31.3s (5/5) FINISHED
 => [internal] load build definition from Dockerfile                                                               0.0s
 => => transferring dockerfile: 130B                                                                               0.0s
 => [internal] load .dockerignore                                                                                  0.1s
 => => transferring context: 2B                                                                                    0.0s
 => [internal] load metadata for docker.io/library/centos:latest                                                  16.3s
 => [1/1] FROM docker.io/library/centos@sha256:a27fd8080b517143cbbbab9dfb7c8571c40d67d534bbdee55bd6c473f432b177   14.8s
 => => resolve docker.io/library/centos@sha256:a27fd8080b517143cbbbab9dfb7c8571c40d67d534bbdee55bd6c473f432b177    0.0s
 => => sha256:a27fd8080b517143cbbbab9dfb7c8571c40d67d534bbdee55bd6c473f432b177 762B / 762B                         0.0s
 => => sha256:a1801b843b1bfaf77c501e7a6d3f709401a1e0c83863037fa3aab063a7fdb9dc 529B / 529B                         0.0s
 => => sha256:5d0da3dc976460b72c77d94c8a1ad043720b0416bfc16c52c45d4847e53fadb6 2.14kB / 2.14kB                     0.0s
 => => sha256:a1d0c75327776413fa0db9ed3adcdbadedc95a662eb1d360dad82bb913f8a1d1 83.52MB / 83.52MB                   9.9s
 => => extracting sha256:a1d0c75327776413fa0db9ed3adcdbadedc95a662eb1d360dad82bb913f8a1d1                          4.5s
 => exporting to image                                                                                             0.0s
 => => exporting layers                                                                                            0.0s
 => => writing image sha256:c32b80a59aaf0df707899602daf20e786973349dbc09307d516646b5c73db27f                       0.0s
 => => naming to docker.io/lbxlh/centos                                                                            0.0s

一定不要忘记 后面有个 . 表示当前目录

7.4 查看镜像

╭─░▒▓ ~/Public/docker-test-volume ▓▒░───────────────────────────────────────────────────────░▒▓ INT ✘  at 23:13:37 ▓▒░
╰─ docker images
REPOSITORY       TAG       IMAGE ID       CREATED        SIZE
tomcat_default   alpha     3be0dc9b1b52   4 hours ago    684MB
tomcat           latest    24207ccc9cce   10 days ago    680MB
redis            latest    aea9b698d7d1   2 weeks ago    113MB
mysql            latest    bbf6571db497   2 weeks ago    516MB
nginx            latest    f652ca386ed1   2 weeks ago    141MB
lbxlh/centos     latest    c32b80a59aaf   3 months ago   231MB

7.5 查看挂载目录