Docker生成新镜像版本的两种方式

There are two ways Docker can generate new mirrored versions

方式一:通过修改镜像生成新版本镜像

Method 1: generate a new version of the image by modifying the image

查看现有镜像版本

View the existing image version

$ docker images
REPOSITORY   TAG       IMAGE ID       CREATED             SIZE
link         v12       baa606cdbecb   About an hour ago   78.4MB
link         v11       eadbb1c71db6   5 weeks ago         78.4MB

进入镜像修改文件

Enter the image modification file

$ docker run --name link -d -p  80:80 link:v12
30f0e4c4545934e9b62b9c282b482232635f4e23854a55350b6d0071d004cfed

$ docker exec -it 30f0e4c45459 sh
/ # sed -i 's/wang/zi.wang/g' /etc/nginx/conf.d/default.conf
/ # cat /etc/nginx/conf.d/default.conf
server {
    listen       80;
    server_name  localhost;

    location / {
        root /usr/src/app/;
        index  index.html index.htm;

        gzip_types text/plain application/javascript application/x-javascript text/css application/xml text/javascript;
        gzip on;

        if_modified_since off;
        etag off;
        add_header Last-Modified "zi.wang";

        if (!-e $request_filename) {
            rewrite ^/[^.]+$  /index.html break;
        }
    }

    error_page   500 502 503 504  /50x.html;
    location = /50x.html {
        root   html;
    }
}
/ # exit

提交镜像版本

Submit mirrored version

$ docker commit -m='add header' -a='wangzi'  30f0e4c45459  link:v13
sha256:60752f362f4e8f856e94133ce2d56393fa9834eb53c2b94b74f6f654f7863cfb

$ docker images
REPOSITORY   TAG       IMAGE ID       CREATED             SIZE
link         v13       60752f362f4e   5 seconds ago       78.4MB
link         v12       baa606cdbecb   About an hour ago   78.4MB
link         v11       eadbb1c71db6   5 weeks ago         78.4MB

运行镜像并验证

Run the image and verify it

$ docker run -d -p 8080:80 link:v13
a6c5e1f7cca9d93cc68b7cfefe24fed0ad981f14ae78aeb36c66c79a17ca2d92

$ docker ps -a
CONTAINER ID   IMAGE      COMMAND                  CREATED              STATUS              PORTS                  NAMES
a6c5e1f7cca9   link:v13   "/docker-entrypoint.…"   3 seconds ago        Up 2 seconds        0.0.0.0:8080->80/tcp   tender_goodall

$curl -i 127.0.0.1:8080
HTTP/1.1 200 OK
Server: nginx/1.21.0
Date: Sat, 03 Jul 2021 11:51:58 GMT
Content-Type: text/html
Content-Length: 514
Connection: keep-alive
Last-Modified: zi.wang
Accept-Ranges: bytes

最终看到新版本中 response haader的 last-modified属性已经被修改了.

Finally, you can see that the Last-Modified property of Response Haader has been modified in the new version.

方式二:通过Dockerfile生成新版本

Method 2: Generate a new version via Dockerfile

创建Dockerfile

Create Dockerfile

Dockerfile

FROM nginx:mainline-alpine-perl

COPY ./nginx.conf /etc/nginx/conf.d/default.conf
ADD ./dist/ /usr/src/app/

# Define default command.
CMD ["nginx", "-g", "daemon off;"]

# Expose ports.
EXPOSE 80

创建build&run脚本

Create the build&run script

build_run.sh

#!/bin/bash
npm run build
docker build -t link:$1 .
docker run  --name link -d -p 80:80 link:$1

运行build&run脚本

Run the build&run script

build command

 bash build_run.sh v11

检查镜像仓库是否生成了新的镜像版本

Check that the image repository has generated a new version of the image

check

$ docker images
REPOSITORY   TAG       IMAGE ID       CREATED          SIZE
link         v11       eadbb1c71db6   5 

$ docker ps -a
CONTAINER ID   IMAGE      COMMAND                  CREATED              STATUS                            PORTS                NAMES
5cba6642ce99   link:v11   "/docker-entrypoint.…"   About a minute ago   Exited (127) About a minute ago                        angry_carver

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