简介

在文章《GraalVM和Spring Native尝鲜
  
  
  
  
  
  
 ，一步步让Springboot启动飞起来  
  
  
  
  
  
 ，66ms完成启动》中
 


 


 


 


 


 


 
，我们介绍了如何使用Spring Native和buildtools插件
 
 
 
 
 
 
，打包出本地镜像   
   
   
   
   
   
  ，也打包成Docker镜像
  
  
  
  
  
  
 。本文探索一下
 

 

 

 

 

 

 
，如果不通过这个插件来生成镜像  
  
  
  
  
  
 。这样我们可以控制更多             、了解更多
 


 


 


 


 


 


 
。

创建Spring Boot项目

创建Spring Boot项目

 

 

 

 

 

 
，引入Spring Native              ，我们主要使用的是Spring Native提供的AOT功能
 
 
 
 
 
 
。如下：

<dependencies> <dependency> <groupId>org.springframework.experimental</groupId> <artifactId>spring-native</artifactId> <version>${spring-native.version}</version> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-web</artifactId> </dependency> </dependencies> <build> <plugins> <plugin> <groupId>org.springframework.experimental</groupId> <artifactId>spring-aot-maven-plugin</artifactId> <version>${spring-native.version}</version> <executions> <execution> <id>test-generate</id> <goals> <goal>test-generate</goal> </goals> </execution> <execution> <id>generate</id> <goals> <goal>generate</goal> </goals> </execution> </executions> </plugin> </plugins> </build>

Build image的时候
 
 

 
 

 
 

 
 

 
 

 
 

 
，我们需要引用依赖库












，所以加上下面的插件：

<plugin> <artifactId>maven-dependency-plugin</artifactId> <executions> <execution> <phase>package</phase> <goals> <goal>copy-dependencies</goal> </goals> <configuration> <outputDirectory>${project.build.directory}/lib</outputDirectory> </configuration> </execution> </executions> </plugin>

接着先编译出Java class                    ，命令如下：

$ mvn clean package

打包本地镜像

前面的命令打包完 
 
 
 
 
 
 
 
 
 
 
 
 
，在target目录下会有一个lib目录



















，我们需要用上   
   
   
   
   
   
  。通过native-image命令来生成镜像             ，如下：

$ native-image -cp ./target/classes/:target/lib/* com.pkslow.springboot.SpringbootGraalVMNativeMain Pkslow.SpringbootGraalVMNativeMain

这样就会生成一个可执行文件：Pkslow.SpringbootGraalVMNativeMain

执行如下：

$ ./Pkslow.SpringbootGraalVMNativeMain

使用了93ms来启动  
 
  
 
  
 
  
 
  
 
  
 
  
，还是很快的
 

 

 

 

 

 

 
。

访问服务是正常的：

$ curl -i http://localhost:8080/hi-graalvm HTTP/1.1 200 Content-Type: text/plain;charset=UTF-8 Content-Length: 67 Date: Wed, 02 Nov 2022 15:08:44 GMT This message is from Spring Boot built/run by GraalVM/Spring Native

创建Docker镜像

先拉取基础镜像：

$ docker pull springci/graalvm-ce:java11-0.12.x

进入容器看一下里面的状况：

$ docker run -it --rm --entrypoint bash springci/graalvm-ce:java11-0.12.x root@d9b54bdce70a:/# pwd / root@d9b54bdce70a:/# java --version openjdk 11.0.15 2022-04-19 OpenJDK Runtime Environment GraalVM 22.1.1.0-dev (build 11.0.15+10-jvmci-22.1-b06) OpenJDK 64-Bit Server VM GraalVM 22.1.1.0-dev (build 11.0.15+10-jvmci-22.1-b06, mixed mode, sharing) root@d9b54bdce70a:/# which java /opt/java/bin/java root@d9b54bdce70a:/# which native-image /opt/java/bin/native-image

准备一下Dockerfile如下：

FROM springci/graalvm-ce:java11-0.12.x VOLUME /tmp ARG PORT=8080 ARG TIME_ZONE=Asia/Shanghai ENV TZ=${TIME_ZONE} EXPOSE ${PORT} RUN pwd RUN mkdir /pkslow-application WORKDIR /pkslow-application/ RUN cd /pkslow-application COPY target/classes/ /pkslow-application/classes/ COPY target/lib/ /pkslow-application/lib/ RUN native-image -cp /pkslow-application/classes/:/pkslow-application/lib/* \ com.pkslow.springboot.SpringbootGraalVMNativeMain \ Pkslow.SpringbootGraalVMNativeMain ENTRYPOINT ["/pkslow-application/Pkslow.SpringbootGraalVMNativeMain"]

打包Docker镜像：

$ docker build . -t pkslow/spring-boot-native-without-buildtools:1.0-SNAPSHOT -f src/main/dker/Dockerfile

完成后通过下面命令启动












，57ms完成启动：

$ docker run -it -p 8080:8080 --rm pkslow/spring-boot-native-without-buildtools:0-SNAPSHOT 2022-11-02 23:48:40.918 INFO 1 --- [ main] o.s.nativex.NativeListener : AOT mode enabled . ____ _ __ _ _ /\\ / ____ __ _ _(_)_ __ __ _ \ \ \ \ ( ( )\___ | _ | _| | _ \/ _` | \ \ \ \ \\/ ___)| |_)| | | | | || (_| | ) ) ) ) |____| .__|_| |_|_| |_\__, | / / / / =========|_|==============|___/=/_/_/_/ :: Spring Boot :: (v2.6.2) 2022-11-02 23:48:40.920 INFO 1 --- [ main] c.p.s.SpringbootGraalVMNativeMain : Starting SpringbootGraalVMNativeMain using Java 11.0.15 on 12528bd45fd7 with PID 1 (/pkslow-application/Pkslow.SpringbootGraalVMNativeMain started by root in /pkslow-application) 2022-11-02 23:48:40.920 INFO 1 --- [ main] c.p.s.SpringbootGraalVMNativeMain : No active profile set, falling back to default profiles: default 2022-11-02 23:48:40.934 INFO 1 --- [ main] o.s.b.w.embedded.tomcat.TomcatWebServer : Tomcat initialized with port(s): 8080 (http) 2022-11-02 23:48:40.935 INFO 1 --- [ main] o.apache.catalina.core.StandardService : Starting service [Tomcat] 2022-11-02 23:48:40.935 INFO 1 --- [ main] org.apache.catalina.core.StandardEngine : Starting Servlet engine: [Apache Tomcat/9.0.56] 2022-11-02 23:48:40.940 INFO 1 --- [ main] o.a.c.c.C.[Tomcat].[localhost].[/] : Initializing Spring embedded WebApplicationContext 2022-11-02 23:48:40.940 INFO 1 --- [ main] w.s.c.ServletWebServerApplicationContext : Root WebApplicationContext: initialization completed in 19 ms 2022-11-02 23:48:40.963 INFO 1 --- [ main] o.s.b.w.embedded.tomcat.TomcatWebServer : Tomcat started on port(s): 8080 (http) with context path 2022-11-02 23:48:40.964 INFO 1 --- [ main] c.p.s.SpringbootGraalVMNativeMain : Started SpringbootGraalVMNativeMain in 0.057 seconds (JVM running for 0.061) 2022-11-02 23:48:57.098 INFO 1 --- [nio-8080-exec-1] o.a.c.c.C.[Tomcat].[localhost].[/] : Initializing Spring DispatcherServlet dispatcherServlet 2022-11-02 23:48:57.098 INFO 1 --- [nio-8080-exec-1] o.s.web.servlet.DispatcherServlet : Initializing Servlet dispatcherServlet 2022-11-02 23:48:57.098 INFO 1 --- [nio-8080-exec-1] o.s.web.servlet.DispatcherServlet : Completed initialization in 0 ms

测试正常启动：

$ curl -i http://127.0.0.1:8080/hi-graalvm HTTP/1.1 200 Content-Type: text/plain;charset=UTF-8 Content-Length: 67 Date: Wed, 02 Nov 2022 15:49:05 GMT This message is from Spring Boot built/run by GraalVM/Spring Native

为了集成打包镜像到CI/CD中
  
  
  
  
  
  
 ，在pom添加以下插件：

<plugin> <groupId>org.codehaus.mojo</groupId> <artifactId>exec-maven-plugin</artifactId> <version>3.0.0</version> <executions> <execution> <phase>install</phase> <goals> <goal>exec</goal> </goals> <configuration> <skip>${docker.skip}</skip> <executable>docker</executable> <arguments> <argument>build</argument> <argument>.</argument> <argument>-t</argument> <argument>pkslow/${project.artifactId}:${project.version}</argument> <argument>-f</argument> <argument>src/main/docker/Dockerfile</argument> </arguments> </configuration> </execution> </executions> </plugin>

通过以下命令即可生成Docker镜像：

$ mvn clean install -Ddocker.skip=false

代码

代码请看GitHub: https://github.com/LarryDpk/pkslow-samples