1 编写dockerfile文件
# 制作镜像
FROM java:8
# 拷贝镜像
COPY *.jar /app.jar
# 设置镜像
CMD ["--server.port=8080"]
# 暴露端口
EXPOSE 8080
# 执行
ENTRYPOINT ["java","-jar","/app.jar"]
2 上传服务器
[root@root idea]# ls
Dockerfile hello-world.jar
3 构建docker镜像
# 构建docker镜像 并指定生成的镜像名称
[root@root idea]# docker build -t lei-hello .
Sending build context to Docker daemon 16.11MB
Step 1/5 : FROM java:8
8: Pulling from library/java
5040bd298390: Pull complete
fce5728aad85: Pull complete
76610ec20bf5: Pull complete
60170fec2151: Pull complete
e98f73de8f0d: Pull complete
11f7af24ed9c: Pull complete
49e2d6393f32: Pull complete
bb9cdec9c7f3: Pull complete
Digest: sha256:c1ff613e8ba25833d2e1940da0940c3824f03f802c449f3d1815a66b7f8c0e9d
Status: Downloaded newer image for java:8
---> d23bdf5b1b1b
Step 2/5 : COPY *.jar /app.jar
---> 551ddfa4fb8c
Step 3/5 : CMD ["--server.port=8089"]
---> Running in d4a368614004
Removing intermediate container d4a368614004
---> 222a6e45de8d
Step 4/5 : EXPOSE 8089
---> Running in 924ecad52ffb
Removing intermediate container 924ecad52ffb
---> b13ea1730b74
Step 5/5 : ENTRYPOINT ["java","-jar","/app.jar"]
---> Running in b8d60b44b116
Removing intermediate container b8d60b44b116
---> e6a00c632a4f
Successfully built e6a00c632a4f
Successfully tagged lei-hello:latest
4 查看镜像
[root@root /]# docker images
REPOSITORY TAG IMAGE ID CREATED SIZE
lei-hello latest e6a00c632a4f About an hour ago 659MB
centos latest 831691599b88 6 days ago 215MB
tomcat 9.0 2eb5a120304e 13 days ago 647MB
nginx latest 2622e6cca7eb 13 days ago 132MB
mysql 5.7 9cfcce23593a 2 weeks ago 448MB
java 8 d23bdf5b1b1b 3 years ago 643MB
5 运行镜像
docker run -d -P --name run_image_name image_name
6 测试请求
[root@root /]# curl localhost:32768
{"timestamp":"2020-06-23T07:12:56.846+0000","status":404,"error":"Not Found","message":"No message available","path":"/"}