Docker部署SpringBoot的两种方法
作者：六月·飞雪
Docker是一种流行的容器化技术,可以帮助开发人员更轻松地构建、部署和运行应用程序,Spring Boot是一种快速开发框架,可以帮助开发人员更快地构建应用程序,本文主要介绍了Docker部署SpringBoot的两种方法,感兴趣的可以了解一下
1.手工方式
1.1.准备Springboot jar项目
将项目打包成jar
1.2.编写Dockerfile
FROM java:8 VOLUME /tmp ADD elk-web-1.0-SNAPSHOT.jar elk.jar EXPOSE 8080 ENTRYPOINT ["java","-Djava.security.egd=file:/dev/./urandom","-jar","/elk.jar"]
FROM：表示基础镜像，即运行环境 VOLUME /tmp创建/tmp目录并持久化到Docker数据文件夹，因为Spring Boot使用的内嵌Tomcat容器默认使用/tmp作为工作目录 ADD：拷贝文件并且重命名(ADD elk-web-1.0-SNAPSHOT.jar elk.jar 将应用jar包复制到/elk.jar) EXPOSE：并不是真正的发布端口，这个只是容器部署人员与建立image的人员之间的交流，即建立image的人员告诉容器布署人员容器应该映射哪个端口给外界 ENTRYPOINT：容器启动时运行的命令，相当于我们在命令行中输入java -jar xxxx.jar，为了缩短 Tomcat 的启动时间，添加java.security.egd的系统属性指向/dev/urandom作为 ENTRYPOINT
1.3.构建容器
[root@VM_0_15_centos elk]# docker build -t elk . Sending build context to Docker daemon 14.43 MB Step 1/5 : FROM java:8 Trying to pull repository docker.io/library/java ... 8: Pulling from docker.io/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 docker.io/java:8 ---> d23bdf5b1b1b Step 2/5 : VOLUME /tmp ---> Running in 0aec2dc2f98c ---> a52e844f25d4 Removing intermediate container 0aec2dc2f98c Step 3/5 : ADD elk-web-1.0-SNAPSHOT.jar elk.jar ---> 3ba2f4fdddda Removing intermediate container 860a0f748a23 Step 4/5 : EXPOSE 8080 ---> Running in 1d3331cc2be6 ---> e9ac33d26ce0 Removing intermediate container 1d3331cc2be6 Step 5/5 : ENTRYPOINT java -Djava.security.egd=file:/dev/./urandom -jar /elk.jar ---> Running in d354f8ee2af5 ---> 8937e1ade6c7 Removing intermediate container d354f8ee2af5 Successfully built 8937e1ade6c7
1.4.运行容器
docker run -di --name 容器名称 -p 8080:8080 镜像名称
其中-d表示后台运行容器，这也就自然地解决的Spring Boot不支持后台运行应用程序的问题。-p 8080:8080表示将容器内部的8080端口映射到宿主机器的8080端口，这样就可以通过宿主机器直接访问应 用。--name 给容器取一个容易记住的名字方便日后管理。
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[root@VM_0_15_centos elk]# docker run -di --name myspringboot -p 8080:8080 8937e1ade6c7 04d6b2c347950a10c95a039c94a3e51d717e516dd8c3c742e3197687dfcf5523 [root@VM_0_15_centos elk]# docker ps -a CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES 04d6b2c34795 8937e1ade6c7 "java -Djava.secur..." 8 seconds ago Up 7 seconds 0.0.0.0:8080->8080/tcp myspringboot [root@VM_0_15_centos elk]#
1.5.查看运行日志
docker logs -f --tail=100 容器名称
[root@VM_0_15_centos elk]# docker logs -f --tail=100 04d6b2c34795
. ____ _ __ _ _
/\\ / ___'_ __ _ _(_)_ __ __ _ \ \ \ \
( ( )\___ | '_ | '_| | '_ \/ _` | \ \ \ \
\\/ ___)| |_)| | | | | || (_| | ) ) ) )
' |____| .__|_| |_|_| |_\__, | / / / /
=========|_|==============|___/=/_/_/_/
:: Spring Boot :: (v1.5.4.RELEASE)
2019-12-29 07:42:58.982 INFO 1 --- [ main] c.b.ElkExampleSpringBootApplication : Starting ElkExampleSpringBootApplication v1.0-SNAPSHOT on 04d6b2c34795 with PID 1 (/elk.jar started by root in /)
2019-12-29 07:42:58.999 INFO 1 --- [ main] c.b.ElkExampleSpringBootApplication : No active profile set, falling back to default profiles: default
2019-12-29 07:42:59.243 INFO 1 --- [ main] ationConfigEmbeddedWebApplicationContext : Refreshing org.springframework.boot.context.embedded.AnnotationConfigEmbeddedWebApplicationContext@5a2e4553: startup date [Sun Dec 29 07:42:59 UTC 2019]; root of context hierarchy
2019-12-29 07:43:03.652 INFO 1 --- [ main] s.b.c.e.t.TomcatEmbeddedServletContainer : Tomcat initialized with port(s): 8080 (http)
2019-12-29 07:43:03.699 INFO 1 --- [ main] o.apache.catalina.core.StandardService : Starting service [Tomcat]
2019-12-29 07:43:03.714 INFO 1 --- [ main] org.apache.catalina.core.StandardEngine : Starting Servlet Engine: Apache Tomcat/8.5.15
2019-12-29 07:43:04.012 INFO 1 --- [ost-startStop-1] o.a.c.c.C.[Tomcat].[localhost].[/] : Initializing Spring embedded WebApplicationContext
2019-12-29 07:43:04.012 INFO 1 --- [ost-startStop-1] o.s.web.context.ContextLoader : Root WebApplicationContext: initialization completed in 4772 ms
2019-12-29 07:43:04.449 INFO 1 --- [ost-startStop-1] o.s.b.w.servlet.ServletRegistrationBean : Mapping servlet: 'dispatcherServlet' to [/]
2019-12-29 07:43:04.470 INFO 1 --- [ost-startStop-1] o.s.b.w.servlet.FilterRegistrationBean : Mapping filter: 'characterEncodingFilter' to: [/*]
2019-12-29 07:43:04.470 INFO 1 --- [ost-startStop-1] o.s.b.w.servlet.FilterRegistrationBean : Mapping filter: 'hiddenHttpMethodFilter' to: [/*]
2019-12-29 07:43:04.471 INFO 1 --- [ost-startStop-1] o.s.b.w.servlet.FilterRegistrationBean : Mapping filter: 'httpPutFormContentFilter' to: [/*]
2019-12-29 07:43:04.471 INFO 1 --- [ost-startStop-1] o.s.b.w.servlet.FilterRegistrationBean : Mapping filter: 'requestContextFilter' to: [/*]
2019-12-29 07:43:05.534 INFO 1 --- [ main] s.w.s.m.m.a.RequestMappingHandlerAdapter : Looking for @ControllerAdvice: org.springframework.boot.context.embedded.AnnotationConfigEmbeddedWebApplicationContext@5a2e4553: startup date [Sun Dec 29 07:42:59 UTC 2019]; root of context hierarchy
2019-12-29 07:43:05.765 INFO 1 --- [ main] s.w.s.m.m.a.RequestMappingHandlerMapping : Mapped "{[/exception]}" onto public java.lang.String com.bruceliu.controller.ELKController.exception()
2019-12-29 07:43:05.766 INFO 1 --- [ main] s.w.s.m.m.a.RequestMappingHandlerMapping : Mapped "{[/elkdemo]}" onto public java.lang.String com.bruceliu.controller.ELKController.helloWorld()
2019-12-29 07:43:05.772 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)
2019-12-29 07:43:05.780 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)
2019-12-29 07:43:05.869 INFO 1 --- [ main] o.s.w.s.handler.SimpleUrlHandlerMapping : Mapped URL path [/webjars/**] onto handler of type [class org.springframework.web.servlet.resource.ResourceHttpRequestHandler]
2019-12-29 07:43:05.869 INFO 1 --- [ main] o.s.w.s.handler.SimpleUrlHandlerMapping : Mapped URL path [/**] onto handler of type [class org.springframework.web.servlet.resource.ResourceHttpRequestHandler]
2019-12-29 07:43:05.984 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]
2019-12-29 07:43:06.387 INFO 1 --- [ main] o.s.j.e.a.AnnotationMBeanExporter : Registering beans for JMX exposure on startup
2019-12-29 07:43:06.537 INFO 1 --- [ main] s.b.c.e.t.TomcatEmbeddedServletContainer : Tomcat started on port(s): 8080 (http)
2019-12-29 07:43:06.562 INFO 1 --- [ main] c.b.ElkExampleSpringBootApplication : Started ElkExampleSpringBootApplication in 8.771 seconds (JVM running for 9.832)
1.6.访问测试
2.Docker远程连接并且使用idea一键部署
2.1.配置docker远程连接端口
首先编辑我们服务器上的docker文件
vim /usr/lib/systemd/system/docker.service
修改以ExecStart开头的行（centos 7）：添加
-H tcp://0.0.0.0:2375 -H unix:///var/run/docker.sock \
修改后保存文件，然后重启docker
systemctl daemon-reload service docker restart
重启之后测试远程连接是否正常，这里的2375是之前配置的端口
curl http://localhost:2375/version
看到返回信息基本上就没有问题了
[root@VM_0_15_centos elk]# curl http://localhost:2375/version
{"Version":"1.13.1","ApiVersion":"1.26","MinAPIVersion":"1.12","GitCommit":"7f2769b/1.13.1","GoVersion":"go1.10.3","Os":"linux","Arch":"amd64","KernelVersion":"3.10.0-957.21.3.el7.x86_64","BuildTime":"2019-09-15T14:06:47.565778468+00:00","PkgVersion":"docker-1.13.1-103.git7f2769b.el7.centos.x86_64"}
然后开启端口，或者关闭防火墙，二者选其一即可
firewall-cmd --zone=public --add-port=2375/tcp --permanent chkconfig iptables off
然后打开浏览器测试将之前的localhost修改为你的ip
2.2.使用idea连接到docker
首先下载docker插件，idea 自带了docker插件。如果没有插件可以选择安装docker插件
然后配置docker地址，在你的File | Settings | Build, Execution, Deployment | Docker
配置完成链接之后，出现了框中的内容即可.
链接成功之后会列出容器和镜像!
配置阿里云镜像加速器：
2.3.docker-maven-plugin 介绍
在我们持续集成过程中，项目工程一般使用 Maven 编译打包，然后生成镜像，通过镜像上线，能够大大提供上线效率，同时能够快速动态扩容，快速回滚，着实很方便。docker-maven-plugin 插件就是为了帮助我们在Maven工程中，通过简单的配置，自动生成镜像并推送到仓库中。
pom.xml:
<build>
<finalName>${project.artifactId}</finalName>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
<configuration>
<fork>true</fork>
</configuration>
</plugin>
<!-- 跳过单元测试 -->
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-surefire-plugin</artifactId>
<configuration>
<skipTests>true</skipTests>
</configuration>
</plugin>
<!--使用docker-maven-plugin插件-->
<plugin>
<groupId>com.spotify</groupId>
<artifactId>docker-maven-plugin</artifactId>
<version>1.0.0</version>
<!--将插件绑定在某个phase执行-->
<executions>
<execution>
<id>build-image</id>
<!--用户只需执行mvn package ，就会自动执行mvn docker:build-->
<phase>package</phase>
<goals>
<goal>build</goal>
</goals>
</execution>
</executions>
<configuration>
<!--指定生成的镜像名-->
<imageName>bruceliu/${project.artifactId}</imageName>
<!--指定标签-->
<imageTags>
<imageTag>latest</imageTag>
</imageTags>
<!--指定基础镜像jdk1.8-->
<baseImage>java</baseImage>
<!--镜像制作人本人信息-->
<maintainer>bruceliu@email.com</maintainer>
<!--切换到ROOT目录-->
<workdir>/ROOT</workdir>
<cmd>["java", "-version"]</cmd>
<entryPoint>["java", "-jar", "/${project.build.finalName}.jar"]</entryPoint>
<!--指定远程 docker api地址-->
<dockerHost>http://122.51.50.249:2375</dockerHost>
<!-- 这里是复制 jar 包到 docker 容器指定目录配置 -->
<resources>
<resource>
<targetPath>/</targetPath>
<!--jar 包所在的路径 此处配置的 即对应 target 目录-->
<directory>${project.build.directory}</directory>
<!--用于指定需要复制的文件 需要包含的 jar包 ，这里对应的是 Dockerfile中添加的文件名 -->
<include>${project.build.finalName}.jar</include>
</resource>
</resources>
</configuration>
</plugin>
</plugins>
</build>
执行Maven打包命令：
G:\softDevelopment\JDK8\bin\java -Dmaven.multiModuleProjectDirectory=E:\workspace2017\elk-web -Dmaven.home=E:\Maven20190910\apache-maven-3.6.1 -Dclassworlds.conf=E:\Maven20190910\apache-maven-3.6.1\bin\m2.conf "-javaagent:G:\idea2017\IntelliJ IDEA 2017.3.1\lib\idea_rt.jar=49260:G:\idea2017\IntelliJ IDEA 2017.3.1\bin" -Dfile.encoding=UTF-8 -classpath E:\Maven20190910\apache-maven-3.6.1\boot\plexus-classworlds-2.6.0.jar org.codehaus.classworlds.Launcher -Didea.version=2017.3.7 -s E:\Maven20190910\apache-maven-3.6.1\conf\settings.xml -Dmaven.repo.local=E:\Maven20190910\repository package [INFO] Scanning for projects... [WARNING] [WARNING] Some problems were encountered while building the effective model for com.bruceliu.elk.demo:elk-web:jar:1.0-SNAPSHOT [WARNING] 'build.plugins.plugin.(groupId:artifactId)' must be unique but found duplicate declaration of plugin org.springframework.boot:spring-boot-maven-plugin @ line 36, column 21 [WARNING] [WARNING] It is highly recommended to fix these problems because they threaten the stability of your build. [WARNING] [WARNING] For this reason, future Maven versions might no longer support building such malformed projects. [WARNING] [INFO] [INFO] -------------------< com.bruceliu.elk.demo:elk-web >-------------------- [INFO] Building elk-web 1.0-SNAPSHOT [INFO] --------------------------------[ jar ]--------------------------------- [INFO] [INFO] --- maven-resources-plugin:2.6:resources (default-resources) @ elk-web --- [INFO] Using 'UTF-8' encoding to copy filtered resources. [INFO] Copying 1 resource [INFO] Copying 0 resource [INFO] [INFO] --- maven-compiler-plugin:3.1:compile (default-compile) @ elk-web --- [INFO] Changes detected - recompiling the module! [INFO] Compiling 2 source files to E:\workspace2017\elk-web\target\classes [INFO] [INFO] --- maven-resources-plugin:2.6:testResources (default-testResources) @ elk-web --- [INFO] Using 'UTF-8' encoding to copy filtered resources. [INFO] skip non existing resourceDirectory E:\workspace2017\elk-web\src\test\resources [INFO] [INFO] --- maven-compiler-plugin:3.1:testCompile (default-testCompile) @ elk-web --- [INFO] Nothing to compile - all classes are up to date [INFO] [INFO] --- maven-surefire-plugin:2.18.1:test (default-test) @ elk-web --- [INFO] Tests are skipped. [INFO] [INFO] --- maven-jar-plugin:2.6:jar (default-jar) @ elk-web --- [INFO] Building jar: E:\workspace2017\elk-web\target\elk-web.jar [INFO] [INFO] --- spring-boot-maven-plugin:1.5.4.RELEASE:repackage (default) @ elk-web --- [INFO] [INFO] --- docker-maven-plugin:1.0.0:build (build-image) @ elk-web --- [INFO] Using authentication suppliers: [ConfigFileRegistryAuthSupplier] [INFO] Copying E:\workspace2017\elk-web\target\elk-web.jar -> E:\workspace2017\elk-web\target\docker\elk-web.jar [INFO] Building image bruceliu/elk-web Step 1/6 : FROM java ---> d23bdf5b1b1b Step 2/6 : MAINTAINER bruceliu@email.com ---> Running in 787e4786fbd4 ---> 4d4519f52fda Removing intermediate container 787e4786fbd4 Step 3/6 : WORKDIR /ROOT ---> f40dcbc9a9eb Removing intermediate container 7fa6bbc9d1df Step 4/6 : ADD /elk-web.jar // ---> c7f1107ae3d4 Removing intermediate container f370558f1a38 Step 5/6 : ENTRYPOINT java -jar /elk-web.jar ---> Running in e4480ced0829 ---> b634ca5fa5ad Removing intermediate container e4480ced0829 Step 6/6 : CMD java -version ---> Running in cc6a064ef921 ---> cf9a5d50326b Removing intermediate container cc6a064ef921 Successfully built cf9a5d50326b [INFO] Built bruceliu/elk-web [INFO] Tagging bruceliu/elk-web with latest [INFO] ------------------------------------------------------------------------ [INFO] BUILD SUCCESS [INFO] ------------------------------------------------------------------------ [INFO] Total time: 10.329 s [INFO] Finished at: 2019-12-29T22:44:06+08:00 [INFO] ------------------------------------------------------------------------ Process finished with exit code 0
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