SpringBoot基礎(chǔ)教程(十六)——與docker的結(jié)合

最近一段時(shí)間，容器化成為了一種趨勢(shì)。一臺(tái)服務(wù)器可以虛擬成多個(gè)容器，同時(shí)提供服務(wù)，共享硬件資源，節(jié)約成本，容器化的翹楚就是Docker，我司的所有微服務(wù)的發(fā)布都已經(jīng)容器化。spring boot 也緊跟潮流，加入了Docker的maven插件，可以通過執(zhí)行命令來(lái)制作鏡像。

本節(jié)的主要內(nèi)容不是講代碼，而是講這個(gè)Docker插件。廢話不多說，上pom

<plugin>
                <groupId>com.spotify</groupId>
                <artifactId>docker-maven-plugin</artifactId>
                <version>0.4.12</version>
                <configuration>
                    <!-- 注意imageName一定要是符合正則[a-z0-9-_.]的，否則構(gòu)建不會(huì)成功 -->
                    <!-- 詳見：https://github.com/spotify/docker-maven-plugin    Invalid repository name ... only [a-z0-9-_.] are allowed-->
                    <imageName>spring-boot-docker-start</imageName>
                    <!--相當(dāng)于from java,本地有使用本地的鏡像，沒有的話從遠(yuǎn)程倉(cāng)庫(kù)拉取-->
                    <baseImage>java</baseImage>
                    <exposes>
                        <!--暴露容器內(nèi)的8080端口-->
                        <expose>8080</expose>
                    </exposes>
                    <!--進(jìn)入點(diǎn)，執(zhí)行的命令-->
                    <entryPoint>["java", "-jar", "/${project.build.finalName}.jar"]</entryPoint>
                    <resources>
                        <resource>
                            <targetPath>/</targetPath>
                            <directory>${project.build.directory}</directory>
                            <include>${project.build.finalName}.jar</include>
                        </resource>
                    </resources>
                </configuration>
            </plugin>

imageName就是鏡像的名稱。baseImage是基礎(chǔ)鏡像，本地有使用本地的鏡像，沒有的話從遠(yuǎn)程倉(cāng)庫(kù)拉取，暴露容器內(nèi)的8080端口，執(zhí)行java -jar 命令，啟動(dòng)微服務(wù)。我們知道使用Docker需要制定Dockerfile文件，里面的元素完全通過maven插件的標(biāo)簽來(lái)體現(xiàn)了。還是有前提的，你得先安裝好Docker。講解到這里，我們開始運(yùn)行
第一步：執(zhí)行mvn clean package docker:build創(chuàng)建生成鏡像。
第二步：?jiǎn)?dòng)鏡像docker run -it -P spring-boot-docker-start,看下容器內(nèi)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 --- [           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<java.util.Map<java.lang.String, java.lang.Object>> 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!

啟動(dòng)成功。
第三步：輸入docker ps看看容器內(nèi)的8080端口被映射到了本機(jī)的哪個(gè)端口

CONTAINER ID        IMAGE                      COMMAND                  CREATED              STATUS              PORTS                     NAMES
075543f8f5b6        spring-boot-docker-start   "java -jar /spring..."   About a minute ago   Up About a minute   0.0.0.0:32768->8080/tcp   trusting_noether

確定是32768端口。
第四步：瀏覽器中輸入http://localhost:32768/hello,看到結(jié)果

image.png

說明我們?cè)L問容器內(nèi)的程序成功了！

下節(jié)將的內(nèi)容是：SpringBoot基礎(chǔ)教程(十七)——與日志的結(jié)合

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