Docker学习笔记05-----镜像仓库之官方Docker Hub

官方Docker Hub

https://hub.docker.com/

1、创建Repository

2、构建容器镜像

2.1、创建Dockerfile

FROM java:8
MAINTAINER itmrl
LABEL name="helloworld" version="1.0.0" author="itmrl"
COPY helloworld.jar helloworld.jar
EXPOSE 8080
CMD ["java","-jar","-Dfile.encoding=UTF-8","-Xms1024m","-Xmx1024m","helloworld.jar"]

2.2、构建镜像

[root@localhost test_dockerfile]# docker build -t itmrl/my-public-repo:1.0.0 .
Sending build context to Docker daemon   16.3MB
Step 1/6 : FROM java:8
 ---> d23bdf5b1b1b
Step 2/6 : MAINTAINER itmrl
 ---> Using cache
 ---> 120755b80993
Step 3/6 : LABEL name="helloworld" version="1.0.0" author="itmrl"
 ---> Using cache
 ---> abb2d50ac587
Step 4/6 : COPY helloworld.jar helloworld.jar
 ---> Using cache
 ---> e32226c676eb
Step 5/6 : EXPOSE 8080
 ---> Using cache
 ---> 8cfe98171a1e
Step 6/6 : CMD ["java","-jar","-Dfile.encoding=UTF-8","-Xms1024m","-Xmx1024m","helloworld.jar"]
 ---> Using cache
 ---> 4a97d3158956
Successfully built 4a97d3158956
Successfully tagged itmrl/my-public-repo:1.0.0

2.3、查看镜像

[root@localhost test_dockerfile]# docker images
REPOSITORY                    TAG                 IMAGE ID            CREATED             SIZE
itmrl/my-public-repo   1.0.0               4a97d3158956        About an hour ago   659MB

2.4、创建容器

[root@localhost test_dockerfile]# docker run itmrl/my-public-repo:1.0.0

  .   ____          _            __ _ _
 /\\ / ___'_ __ _ _(_)_ __  __ _ \ \ \ \
( ( )\___ | '_ | '_| | '_ \/ _` | \ \ \ \
 \\/  ___)| |_)| | | | | || (_| |  ) ) ) )
  '  |____| .__|_| |_|_| |_\__, | / / / /
 =========|_|==============|___/=/_/_/_/
 :: Spring Boot ::        (v2.0.5.RELEASE)
2021-02-26 12:38:48.180  INFO 1 --- [           main] com.example.demo.DemoApplication         : Starting DemoApplication on 141ac6fb329c with PID 1 (/helloworld.jar started by root in /)
2021-02-26 12:38:48.190  INFO 1 --- [           main] com.example.demo.DemoApplication         : No active profile set, falling back to default profiles: default
2021-02-26 12:38:48.295  INFO 1 --- [           main] ConfigServletWebServerApplicationContext : Refreshing org.springframework.boot.web.servlet.context.AnnotationConfigServletWebServerApplicationContext@b065c63: startup date [Fri Feb 26 12:38:48 UTC 2021]; root of context hierarchy
2021-02-26 12:38:49.732  INFO 1 --- [           main] o.s.b.w.embedded.tomcat.TomcatWebServer  : Tomcat initialized with port(s): 8080 (http)

2.5、将本地镜像推送到Docker Hub

[root@localhost test_dockerfile]# docker push itmrl/my-public-repo:1.0.0
The push refers to repository [docker.io/itmrl/my-public-repo]
7ecd0eab9c73: Preparing 
35c20f26d188: Preparing 
c3fe59dd9556: Preparing 
6ed1a81ba5b6: Preparing 
a3483ce177ce: Preparing 
ce6c8756685b: Waiting 
30339f20ced0: Waiting 
0eb22bfb707d: Waiting 
a2ae92ffcd29: Waiting 
denied: requested access to the resource is denied

提示错误：denied: requested access to the resource is denied。在推送之前首先需要登录到Docker Hub

[root@localhost test_dockerfile]# 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: itmrl
Password: 
WARNING! Your password will be stored unencrypted in /root/.docker/config.json.
Configure a credential helper to remove this warning. See
https://docs.docker.com/engine/reference/commandline/login/#credentials-store

Login Succeeded

推送镜像

[root@localhost test_dockerfile]# docker push itmrl/my-public-repo:1.0.0

官方Docker Hub速度很慢,推送会经常会卡住