我想在 Jenkins 建立一个 docker 形象。
我的要求是建立 war ,并使用Dockerfile在tomcat中部署一个 Spring 启动应用程序。
我的Dockerfile是
FROM maven:3.5-jdk-8-alpine
WORKDIR /app
COPY pom.xml /app/
RUN cd /app/ && mvn install
FROM tomcat:9
EXPOSE 8087
COPY /target/*.war /usr/local/tomcat/webapps/
CMD ["catalina.sh","run"]
我得到的错误是:[INFO] Total time: 49:49 min
[INFO] Finished at: 2020-07-23T12:21:16Z
[INFO] ------------------------------------------------------------------------
[ERROR] Failed to execute goal org.springframework.boot:spring-boot-maven-plugin:2.4.0-SNAPSHOT:repackage (repackage) on project restcurd: Execution repackage of goal org.springframework.boot:spring-boot-maven-plugin:2.4.0-SNAPSHOT:repackage failed: Unable to find main class -> [Help 1]
[ERROR]
[ERROR] To see the full stack trace of the errors, re-run Maven with the -e switch.
[ERROR] Re-run Maven using the -X switch to enable full debug logging.
[ERROR]
[ERROR] For more information about the errors and possible solutions, please read the following articles:
[ERROR] [Help 1] http://cwiki.apache.org/confluence/display/MAVEN/PluginExecutionException
The command '/bin/sh -c cd /app/ && mvn install' returned a non-zero code: 1
Build step 'Execute shell' marked build as failure
运行Dockerfile的命令:docker build -t boot .
我找不到错误的原因。有人告诉我pom.xml中存在错误
有我的pom.xml
<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
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>2.4.0-SNAPSHOT</version>
<relativePath/> <!-- lookup parent from repository -->
</parent>
<groupId>com.example</groupId>
<artifactId>restcurd</artifactId>
<version>0.0.1-SNAPSHOT</version>
<name>restcurd</name>
<packaging>war</packaging>
<description>Demo project for Spring Boot</description>
<properties>
<java.version>1.8</java.version>
<spring-cloud.version>2020.0.0-SNAPSHOT</spring-cloud.version>
</properties>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-data-jpa</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</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-tomcat</artifactId>
<scope>provided</scope>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-devtools</artifactId>
<scope>runtime</scope>
<optional>true</optional>
</dependency>
<dependency>
<groupId>org.postgresql</groupId>
<artifactId>postgresql</artifactId>
<scope>runtime</scope>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
</dependency>
</dependencies>
<dependencyManagement>
<dependencies>
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-dependencies</artifactId>
<version>${spring-cloud.version}</version>
<type>pom</type>
<scope>import</scope>
</dependency>
</dependencies>
</dependencyManagement>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
<!-- Dockerfile Maven -->
<plugin>
<groupId>com.spotify</groupId>
<artifactId>dockerfile-maven-plugin</artifactId>
<version>1.4.10</version>
<executions>
<execution>
<id>default</id>
<phase>package</phase>
<goals>
<goal>build</goal>
<!-- <goal>push</goal> -->
</goals>
</execution>
</executions>
<configuration>
<repository>pomkiticat/${project.name}</repository>
<tag>${project.version}</tag>
<skipDockerInfo>true</skipDockerInfo>
</configuration>
</plugin>
<!--docker-->
</plugins>
</build>
<repositories>
<repository>
<id>spring-milestones</id>
<name>Spring Milestones</name>
<url>https://repo.spring.io/milestone</url>
</repository>
<repository>
<id>spring-snapshots</id>
<name>Spring Snapshots</name>
<url>https://repo.spring.io/snapshot</url>
<snapshots>
<enabled>true</enabled>
</snapshots>
</repository>
</repositories>
<pluginRepositories>
<pluginRepository>
<id>spring-milestones</id>
<name>Spring Milestones</name>
<url>https://repo.spring.io/milestone</url>
</pluginRepository>
<pluginRepository>
<id>spring-snapshots</id>
<name>Spring Snapshots</name>
<url>https://repo.spring.io/snapshot</url>
<snapshots>
<enabled>true</enabled>
</snapshots>
</pluginRepository>
</pluginRepositories>
</project>
我找不到问题。2. pom.xml有什么问题?
提前致谢。
最佳答案
问题不是 docker ,而是您的pom。尝试使用shell以交互方式运行docker容器,并检查您的maven错误并进行修复:
FROM maven:3.5-jdk-8-alpine
WORKDIR /app
COPY pom.xml /app/
然后尝试进入容器:docker build -t boot .
docker run -ti boot sh
# # Type in whatever shell command like your maven command and debug it
# mvn install
编辑:我给出的解释是尝试验证您的Dockerfile并了解它是否无效。您的Dockerfile包含“mvn install”命令以构建应用程序。但是,正如您在运行此命令时所解释的那样,该命令失败。
严格来说,我需要4个步骤:
第1步:确保您的mvn安装构建程序在本地正常运行,并且不涉及任何docker。看来您错过了主要类。您是否在没有docker的情况下在本地重现此错误?是=>通过添加该Main类对其进行修复。否=>转到下一步。
第2步:使用Docker创建一个容器,以构建您的应用并使其正常运行。如果它不起作用,但是您的本地构建有效,则您的容器具有与本地不同的执行上下文,这是一个问题。我在答复中提出的解决方案是再次确认这一点。您需要在容器内运行命令。显然,您无法通过收到的新错误来执行此操作。我强烈建议您在尝试进一步使用docker之前接受过培训,因为您似乎有点迷失了方向。 (无罪,有时我们只需要训练更多)。
第3步:理想情况下,您的容器只能建立,产生 war ,然后使用另一个容器进行 war 。您不需要源代码+最终容器中的所有中间生成文件。
步骤4:测试您的最终容器。
关于spring-boot - 将Maven项目化后,出现错误。构建Dockerfile时发生错误。怎么解决呢?,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/63057933/