sheng的学习笔记-docker部署springboot

docker部署，原理，命令，可以参考：docker原理图，部署，命令

将springboot部署到docker中

遇到过的问题：

pom配置

操作步骤

生成jar

构建镜像

查看镜像docker images

运行镜像

查看运行的镜像

将springboot部署到docker中

遇到过的问题：

生成出来的jar包缺少依赖JAR的
启动时找不到主类
容器启动后主机拒绝

pom配置

pom.xml的文件,下面红色的，是docker相关的

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://maven.apache.org/POM/4.0.0"xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd"><modelVersion>4.0.0</modelVersion><parent><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-parent</artifactId><version>2.7.10-SNAPSHOT</version><relativePath/> <!-- lookup parent from repository --></parent><groupId>com.sheng</groupId><artifactId>myDemo</artifactId><version>0.0.1-SNAPSHOT</version><name>myDemo</name><description>Demo project for Spring Boot</description><properties><java.version>1.8</java.version><spring-cloud.version>2021.0.5</spring-cloud.version><dockerfile-maven-plugin.version>1.4.10</dockerfile-maven-plugin.version><docker.image.prefix>springboot</docker.image.prefix></properties><dependencies><dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-actuator</artifactId></dependency><dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-web</artifactId></dependency><dependency><groupId>org.springframework.cloud</groupId><artifactId>spring-cloud-starter-loadbalancer</artifactId></dependency><dependency><groupId>org.springframework.cloud</groupId><artifactId>spring-cloud-starter-netflix-eureka-client</artifactId></dependency><dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-configuration-processor</artifactId><optional>true</optional></dependency><dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-thymeleaf</artifactId></dependency><dependency><groupId>org.projectlombok</groupId><artifactId>lombok</artifactId><optional>true</optional></dependency><dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-test</artifactId><scope>test</scope></dependency><dependency><groupId>org.springframework.security</groupId><artifactId>spring-security-test</artifactId><scope>test</scope></dependency><dependency><groupId>junit</groupId><artifactId>junit</artifactId><scope>test</scope></dependency><dependency><groupId>com.alibaba</groupId><artifactId>fastjson</artifactId><version>1.2.47</version></dependency><dependency><groupId>org.slf4j</groupId><artifactId>slf4j-simple</artifactId><version>1.7.25</version><scope>compile</scope></dependency><dependency><groupId>com.google.code.gson</groupId><artifactId>gson</artifactId></dependency><dependency><groupId>org.apache.commons</groupId><artifactId>commons-lang3</artifactId><version>3.4</version></dependency><dependency><groupId>com.spotify</groupId><artifactId>dockerfile-maven-plugin</artifactId><version>${dockerfile-maven-plugin.version}</version></dependency></dependencies><dependencyManagement><dependencies><dependency><groupId>org.springframework.cloud</groupId><artifactId>spring-cloud-dependencies</artifactId><version>${spring-cloud.version}</version><type>pom</type><scope>import</scope></dependency></dependencies></dependencyManagement><build><plugins><!--docker和maven结合的配置--><plugin><groupId>com.spotify</groupId><artifactId>dockerfile-maven-plugin</artifactId><version>${dockerfile-maven-plugin.version}</version><executions><execution><id>default</id><goals><!--如果package时不想用docker打包,就注释掉这个goal,运行mvn package时，会自动执行build目标，构建Docker镜像。当运行mvn deploy命令时，会自动执行push目标，将Docker镜像push到Docker仓库--><!--<goal>build</goal><goal>push</goal>--></goals></execution></executions><configuration><!--在maven运行docker时，dockerFile文件必须在这个文件夹内--><contextDirectory>${project.basedir}/docker</contextDirectory><!--repository指定docker镜像的repo名字--><repository>${docker.image.prefix}/demo</repository><!--tag指定docker镜像的tag--><tag>v1</tag><!--buildArgs可以指定一个或多个变量，传递给Dockerfile，在Dockerfile中通过ARG指令进行引用。暂时不用，注释掉--><!--<buildArgs><JAR_FILE>${project.build.finalName}.jar</JAR_FILE></buildArgs>--></configuration></plugin><plugin><!--用于生成jar的时候，将依赖的包也导入进去，否则无法启动，另外MANIFEST.MF文件中会找不到启动类--><groupId>org.springframework.boot</groupId><artifactId>spring-boot-maven-plugin</artifactId><configuration><excludes><exclude><groupId>org.projectlombok</groupId><artifactId>lombok</artifactId></exclude></excludes><includeSystemScope>true</includeSystemScope><mainClass>${start-class}</mainClass></configuration><executions><execution><goals><goal>repackage</goal></goals></execution></executions></plugin><plugin><groupId>org.apache.maven.plugins</groupId><artifactId>maven-surefire-plugin</artifactId><configuration><testFailureIgnore>true</testFailureIgnore></configuration></plugin></plugins></build><repositories><repository><id>spring-milestones</id><name>Spring Milestones</name><url>https://repo.spring.io/milestone</url><snapshots><enabled>false</enabled></snapshots></repository><repository><id>spring-snapshots</id><name>Spring Snapshots</name><url>https://repo.spring.io/snapshot</url><releases><enabled>false</enabled></releases></repository></repositories><pluginRepositories><pluginRepository><id>spring-milestones</id><name>Spring Milestones</name><url>https://repo.spring.io/milestone</url><snapshots><enabled>false</enabled></snapshots></pluginRepository><pluginRepository><id>spring-snapshots</id><name>Spring Snapshots</name><url>https://repo.spring.io/snapshot</url><releases><enabled>false</enabled></releases></pluginRepository></pluginRepositories></project>

操作步骤

生成jar

先maven上点击clean compile package在target生成JAR包（myDemo-0.0.1-SNAPSHOT.jar）把它用解压缩包打开，看看MANIFEST.MF中有没有主函数入口，有红圈的就行，不然无法启动，会报错no main manifest attribute, in /xxxxx.jar异常将 F:\workspace\arch\spring-cloud-demo\target\myDemo-0.0.1-SNAPSHOT.jar 拷贝到 F:\workspace\arch\spring-cloud-demo\docker
F:\workspace\arch\spring-cloud-demo\docker 文件夹中应该有Dockerfile 和 myDemo-0.0.1-SNAPSHOT.jar