SpringBoot与docker的结合的示例

SpringBoot与docker的结合的示例

最近一段时间，容器化成为了一种趋势。一台服务器可以虚拟成多个容器，同时提供服务，共享硬件资源，节约成本，容器化的翘楚就是docker，我司的所有微服务的发布都已经容器化。spring boot 也紧跟潮流，加入了Docker的maven插件，可以通过执行命令来制作镜像。

本节的主要内容不是讲代码，而是讲这个Docker插件。废话不多说，上pom

com.spotify

docker-maven-plugin

0.4.12

spring-boot-docker-start

java

8080

["java", "-jar", "/${project.build.finalName}.jar"]

/

${project.build.directory}

${project.build.finalName}.jar

imageName就是镜像的名称。baseImage是基础镜像，本地有使用本地的镜像，没有的话从远程仓库拉取，暴露容器内的8080端口，执行java -jar 命令，启动微服务。我们知道使用Docker需要制定Dockerfile文件，里面的元素完全通过maven插件的标签来体现了。还是有前提的，你得先安装好Docker。讲解到这里，我们开始运行

第一步：执行mvn clean package docker:build创建生成镜像。

第二步：启动镜像docker run -it -P spring-boot-docker-start,看下容器内的日志

➜ spring-boot-docker-start git:(master) docker run -it -P spring-boot-docker-start

. ____ _ __ _ _

/\\ / ___'_ __ _ _(_)_ __ __ _ \ \ \ \

( ( )\___ | '_ | '_| | '_ \/ _` | \ \ \ \

\\/ ___)| |_)| | | | | || (_| | ) ) ) )

' |____| .__|_| |_|_| |_\__, | / / / /

=========|_|==============|___/=/_/_/_/

:: Spring Boot :: (v1.3.5.RELEASE)

2018-03-25 08:41:56.274 INFO 1 --- [ main] com.shuqi.ApplicationMain : Starting ApplicationMain on 075543f8f5b6 with PID 1 (/spring-boot-docker-start.jar started by root in /)

2018-03-25 08:41:56.287 INFO 1 --- [ main] com.shuqi.ApplicationMain : No active profile set, falling back to default profiles: default

2018-03-25 08:41:56.406 INFO 1 ---rvdLX [ main] ationConfigEmbeddedWebApplicationContext : Refreshing org.springframework.boot.context.embedded.AnnotationConfigEmbeddedWebApplicationContext@126d28d3: startup date [Sun Mar 25 08:41:56 UTC 2018]; root of context hierarchy

2018-03-25 08:41:58.356 INFO 1 --- [ main] s.b.c.e.t.TomcatEmbeddedServletContainer : Tomcat initialized with port(s): 8080 (http)

2018-03-25 08:41:58.382 INFO 1 --- [ main] o.apache.catalina.core.StandardService : Starting service Tomcat

2018-03-25 08:41:58.384 INFO 1 --- [ main] org.apache.catalina.core.StandardEngine : Starting Servlet Engine: Apache Tomcat/8.0.33

2018-03-25 08:41:58.512 INFO 1 --- [ost-startStop-1] o.a.c.c.C.[Tomcat].[localhost].[/] : Initializing Spring embedded WebApplicationContext

2018-03-25 08:41:58.512 INFO 1 --- [ost-startStop-1] o.s.web.context.ContextLoader : Root WebApplicationContext: initialization completed in 2113 ms

2018-03-25 08:41:58.920 INFO 1 --- [ost-startStop-1] o.s.b.c.e.ServletRegistrationBean : Mapping servlet: 'dispatcherServlet' to [/]

2018-03-25 08:41:58.928 INFO 1 --- [ost-startStop-1] o.s.b.c.embedded.FilterRegistrationBean : Mapping filter: 'characterEncodingFilter' to: [/*]

2018-03-25 08:41:58.937 INFO 1 --- [ost-startStop-1] o.s.b.c.embedded.FilterRegistrationBean : Mapping filter: 'hiddenHttpMethodFilter' to: [/*]

2018-03-25 08:41:58.937 INFO 1 --- [ost-startStop-1] o.s.b.c.embedded.FilterRegistrationBean : Mapping filter: 'httpPutFormContentFilter' to: [/*]

2018-03-25 08:41:58.938 INFO 1 --- [ost-startStop-1] o.s.b.c.embedded.FilterRegistrationBean : Mapping filter: 'requestContextFilter' to: [/*]

2018-03-25 08:41:59.406 INFO 1 --- [ main] s.w.s.m.m.a.RequestMappingHandlerAdapter : Looking for @ControllerAdvice: org.springframework.boot.context.embedded.AnnotationConfigEmbeddedWebApplicationContext@126d28d3: startup date [Sun Mar 25 08:41:56 UTC 2018]; root of context hierarchy

2018-03-25 08:41:59.516 INFO 1 --- [ main] s.w.s.m.m.a.RequestMappingHandlerMapping : Mapped "{[/hello],methods=[GET]}" onto public java.lang.String com.shuqi.controller.HelloController.hello()

2018-03-25 08:41:59.523 INFO 1 --- [ main] s.w.s.m.m.a.RequestMappingHandlerMapping : Mapped "{[/error],produces=[text/html]}" onto public org.springframework.web.servlet.ModelAndView org.springframework.boot.autoconfigure.web.BasicErrorController.errorHtml(javax.servlet.http.HttpServletRequest,javax.servlet.http.HttpServletResponse)

2018-03-25 08:41:59.524 INFO 1 --- [ main] s.w.s.m.m.a.RequestMappingHandlerMapping : Mapped "{[/error]}" onto public org.springframework.http.ResponseEntity> org.springframework.boot.autoconfigure.web.BasicErrorController.error(javax.servlet.http.HttpServletRequest)

2018-03-25 08:41:59.584 INFO 1 --- [ main] o.s.w.s.handler.SimpleUrlHandlerMapping : Mapped URL path [/webjars/**] onto handler of type [class org.springframework.web.servlet.resource.ResourceHttpRequestHandler]

2018-03-25 08:41:59.585 INFO 1 --- [ main] o.s.w.s.handler.SimpleUrlHandlerMapping : Mapped URL path [/**] onto handler of type [class org.springframework.web.servlet.resource.ResourceHttpRequestHandler]

2018-03-25 08:41:59.645 INFO 1 --- [ main] o.s.w.s.handler.SimpleUrlHandlerMapping : Mapped URL path [/**/favicon.ico] onto handler of type [class org.springframework.web.servlet.resource.ResourceHttpRequestHandler]

2018-03-25 08:41:59.754 INFO 1 --- [ main] o.s.j.e.a.AnnotationMBeanExporter : Registering beans for JMX exposure on startup

2018-03-25 08:41:59.834 INFO 1 --- [ main] s.b.c.e.t.TomcatEmbeddedServletContainer : Tomcat started on port(s): 8080 (http)

2018-03-25 08:41:59.838 INFO 1 --- [ main] com.shuqi.ApplicationMain : Started ApplicationMain in 4.084 seconds (JVM running for 5.012)

[2018-03-25 08:41:59] server started!

启动成功。

第三步：输入docker ps看看容器内的8080端口被映射到了本机的哪个端口

CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES

07554rvdLX3f8f5b6 spring-boot-docker-start "java -jar /spring..." About a minute ago Up About a minute 0.0.0.0:32768->8080/tcp trusting_noether

确定是32768端口。

第四步：浏览器中输入http://localhost:32768/hello,看到结果

说明我们访问容器内的程序成功了！

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