Docker There are two ways to generate a new image version

There are two ways Docker can generate new mirrored versions

Mode one : Generate a new version image by modifying the image

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

• View the existing image version

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

• Enter the image to modify the file

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

• Commit image version

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

• Run the image and verify

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

• Finally, I see the new version response haader Of last-modified Property has been modified .

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

Mode two : adopt Dockerfile Generate new version

Method 2: Generate a new version via Dockerfile

• establish 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

• establish build&run Script

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

• function build&run Script

Run the build&run script

build command

 bash build_run.sh v11

• Check whether the image warehouse generates a new image version

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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