Docker image push到Docker Hub的方法如下。
首先註冊一個Docker Hub帳戶並登入。在Docker Hub的Repositories中目前並沒有任何image。下面將把local build好的spring-boot-demo:0.0.1-SNAPSHOT image推送到Docker Hub。
例如在local有一個建置好的spring-boot-demo:0.0.1-SNAPSHOT image如下。
$ docker images
REPOSITORY TAG IMAGE ID CREATED SIZE
spring-boot-demo 0.0.1-SNAPSHOT cc8fbb17a345 50 years ago 148MB
把image push到Docker Hub要先在命令列用docker login登入Docker Hub。
$ docker login
Login with your Docker ID to push and pull images from Docker Hub. If you don't have a Docker ID, head over to https://hub.docker.com to create one.
Username: matthung0807
Password:
Login Succeeded
如果直接用docker push spring-boot-demo:0.0.1-SNAPSHOT會出現denied: requested access to the resource is denied錯誤訊息。
$ docker push spring-boot-demo:0.0.1-SNAPSHOT
The push refers to repository [docker.io/library/spring-boot-demo]
08ca6969bf61: Preparing
5cdfd70ab65d: Preparing
273175f8ad19: Preparing
012bb6144b38: Preparing
0a14b263fc87: Preparing
231bdbae9aea: Waiting
87c9f1582ca0: Waiting
7a5b9c0b4b14: Waiting
denied: requested access to the resource is denied
錯誤原因是推送的image名稱前要加上Docker Hub的帳號名稱(DOCKER ID)，所以要用
docker tag <image_name[:tag]> <DOCKER_ID>/<image_name[:tag]>
在原本的image名稱前加上DOCKER_ID。
例如我的Docker Hub帳號是matthung0807，所以輸入以下把spring-boot-demo:0.0.1-SNAPSHOT修改為matthung0807/spring-boot-demo:0.0.1-SNAPSHOT：
docker tag spring-boot-demo:0.0.1-SNAPSHOT matthung0807/spring-boot-demo:0.0.1-SNAPSHOT。
$ docker tag spring-boot-demo:0.0.1-SNAPSHOT matthung0807/spring-boot-demo:0.0.1-SNAPSHOT
輸入後除了原來的spring-boot-demo 還會多一個修改名稱後的matthung0807/spring-boot-demo image。
$ docker images
REPOSITORY TAG IMAGE ID CREATED SIZE
spring-boot-demo 0.0.1-SNAPSHOT cc8fbb17a345 50 years ago 148MB
matthung0807/spring-boot-demo 0.0.1-SNAPSHOT cc8fbb17a345 50 years ago 148MB
接著就可以用docker push <DOCKER_ID>/<image_name>[:tag]把image推送到Docker Hub。所以這邊輸入：
$ docker push matthung0807/spring-boot-demo:0.0.1-SNAPSHOT把matthung0807/spring-boot-demo:0.0.1-SNAPSHOT push到Docker Hub。
$ docker push matthung0807/spring-boot-demo:0.0.1-SNAPSHOT
The push refers to repository [docker.io/matthung0807/spring-boot-demo]
08ca6969bf61: Pushed
5cdfd70ab65d: Pushed
273175f8ad19: Pushed
012bb6144b38: Pushed
0a14b263fc87: Pushed
231bdbae9aea: Pushed
87c9f1582ca0: Pushed
7a5b9c0b4b14: Pushed
0.0.1-SNAPSHOT: digest: sha256:e381f13d5db025554338f0ee9454a75f44792e984c721550710023fdb78bd6f9 size: 1999
到Docker Hub帳戶的Repositories重新整理可看到剛推送的matthung0807/spring-boot-demo。
下面接著測試pull並運行剛推送的image。
輸入$ docker rmi matthung0807/spring-boot-demo:0.0.1-SNAPSHOT把local的matthung0807/spring-boot-demo:0.0.1-SNAPSHOT image刪除。
$ docker rmi matthung0807/spring-boot-demo:0.0.1-SNAPSHOT
Untagged: matthung0807/spring-boot-demo:0.0.1-SNAPSHOT
Untagged: matthung0807/spring-boot-demo@sha256:e381f13d5db025554338f0ee9454a75f44792e984c721550710023fdb78bd6f9
輸入docker run -p 8080:8080 --name demo matthung0807/spring-boot-demo:0.0.1-SNAPSHOT將Docker Hub的image pull下來並以容器執行。
$ docker run -p 8080:8080 --name demo matthung0807/spring-boot-demo:0.0.1-SNAPSHOT
Unable to find image 'matthung0807/spring-boot-demo:0.0.1-SNAPSHOT' locally
0.0.1-SNAPSHOT: Pulling from matthung0807/spring-boot-demo
Digest: sha256:e381f13d5db025554338f0ee9454a75f44792e984c721550710023fdb78bd6f9
Status: Downloaded newer image for matthung0807/spring-boot-demo:0.0.1-SNAPSHOT
. ____ _ __ _ _
/\\ / ___'_ __ _ _(_)_ __ __ _ \ \ \ \
( ( )\___ | '_ | '_| | '_ \/ _` | \ \ \ \
\\/ ___)| |_)| | | | | || (_| | ) ) ) )
' |____| .__|_| |_|_| |_\__, | / / / /
=========|_|==============|___/=/_/_/_/
:: Spring Boot :: (v2.3.2.RELEASE)
2020-12-12 16:14:08.417 INFO 1 --- [ main] c.a.d.DemoApplication : Starting DemoApplication on 415b9dc89cbf with PID 1 (/app/classes started by root in /)
2020-12-12 16:14:08.433 INFO 1 --- [ main] c.a.d.DemoApplication : No active profile set, falling back to default profiles: default
2020-12-12 16:14:09.784 INFO 1 --- [ main] o.s.b.w.e.t.TomcatWebServer : Tomcat initialized with port(s): 8080 (http)
2020-12-12 16:14:09.826 INFO 1 --- [ main] o.a.c.c.StandardService : Starting service [Tomcat]
2020-12-12 16:14:09.826 INFO 1 --- [ main] o.a.c.c.StandardEngine : Starting Servlet engine: [Apache Tomcat/9.0.37]
2020-12-12 16:14:09.931 INFO 1 --- [ main] o.a.c.c.C.[.[.[/demo] : Initializing Spring embedded WebApplicationContext
2020-12-12 16:14:09.931 INFO 1 --- [ main] w.s.c.ServletWebServerApplicationContext : Root WebApplicationContext: initialization completed in 1416 ms
2020-12-12 16:14:10.234 INFO 1 --- [ main] o.s.s.c.ThreadPoolTaskExecutor : Initializing ExecutorService 'applicationTaskExecutor'
2020-12-12 16:14:10.523 INFO 1 --- [ main] o.s.b.w.e.t.TomcatWebServer : Tomcat started on port(s): 8080 (http) with context path '/demo'
2020-12-12 16:14:10.538 INFO 1 --- [ main] c.a.d.DemoApplication : Started DemoApplication in 2.897 seconds (JVM running for 4.089)
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