Docker 错误：jarfile/app.jar无效或损坏

我试图将spring boot创建的微服务推送到ibm云托管的K8群集，但在启动时不断出现以下错误：

Error: Invalid or corrupt jarfile /app.jar

我的dockerfile：

FROM openjdk:8-jdk-alpine
VOLUME /tmp
ARG JAR_FILE
COPY ${JAR_FILE} app.jar
ENTRYPOINT ["java","-Djava.security.egd=file:/dev/./urandom","-jar","/app.jar"]

my pom.xml：

<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 http://maven.apache.org/xsd/maven-4.0.0.xsd">
  <modelVersion>4.0.0</modelVersion>

  <groupId>projects</groupId>
  <artifactId>mydb2jdbcproject</artifactId>
  <version>1</version>

  <properties>
    <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
    <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
    <maven.compiler.source>1.8</maven.compiler.source>
    <maven.compiler.target>1.8</maven.compiler.target>
    <java.version>1.8</java.version>
    <spring-cloud.version>Dalston.SR4</spring-cloud.version>
    <docker.image.prefix>springio</docker.image.prefix>
    <app.name>mydb2jdbcproject</app.name>
  </properties>

  <parent>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-parent</artifactId>
    <version>1.5.15.RELEASE</version>
  </parent>

  <dependencies>
  <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-actuator</artifactId>
    </dependency>
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-jdbc</artifactId>
    </dependency>
    <dependency>
      <groupId>com.ibm.db2.jcc</groupId>
      <artifactId>db2jcc4</artifactId>
      <version>4.26.14</version>
    </dependency>
    <dependency>
      <groupId>org.springframework.boot</groupId>
      <artifactId>spring-boot-starter-web</artifactId>
    </dependency>
    <dependency>
      <groupId>org.springframework.boot</groupId>
      <artifactId>spring-boot-actuator</artifactId>
    </dependency>
    <dependency>
      <groupId>org.springframework.cloud</groupId>
      <artifactId>spring-cloud-starter-hystrix</artifactId>
    </dependency>
    <dependency>
      <groupId>org.springframework.boot</groupId>
      <artifactId>spring-boot-starter-test</artifactId>
      <scope>test</scope>
    </dependency>
    <dependency>
      <groupId>javax.json</groupId>
      <artifactId>javax.json-api</artifactId>
      <version>1.0</version>
      <scope>provided</scope>
    </dependency>
    <dependency>
      <groupId>com.jayway.jsonpath</groupId>
      <artifactId>json-path</artifactId>
      <version>2.4.0</version>
    </dependency>
    <dependency>
      <groupId>com.ibm.cloud</groupId>
      <artifactId>ibm-cloud-spring-boot-service-bind</artifactId>
      <version>1.1.1</version>
    </dependency>
    <dependency>
      <groupId>org.eclipse.microprofile.config</groupId>
      <artifactId>microprofile-config-api</artifactId>
      <version>1.1</version>
      <scope>provided</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>

  <repositories>
    <repository>
      <id>repo</id>
      <url>file://${project.basedir}/lib</url>
    </repository>
  </repositories>

  <build>
    <plugins>
      <plugin>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-maven-plugin</artifactId>
      </plugin>
      <plugin>
        <groupId>com.spotify</groupId>
        <artifactId>dockerfile-maven-plugin</artifactId>
        <version>1.4.9</version>
        <configuration>
          <repository>${docker.image.prefix}/${project.artifactId}</repository>
          <buildArgs>
            <JAR_FILE>target/${project.build.finalName}.jar</JAR_FILE>
          </buildArgs>
        </configuration>
      </plugin>
        <plugin>
  <groupId>io.fabric8</groupId>
  <artifactId>docker-maven-plugin</artifactId>
  <extensions>true</extensions>
  <configuration>
    <images>
      <image>
        <name>us.icr.io/rbs1/rbstest</name>
        <build>
          <from>adoptopenjdk/openjdk8-openj9</from>
          <entryPoint>
            <exec>
              <arg>java</arg>
              <arg>-jar</arg>
              <arg>/${project.build.finalName}.jar</arg>
            </exec>
          </entryPoint>
          <assembly>
            <targetDir>/</targetDir>
            <mode>dir</mode>
            <descriptorRef>artifact</descriptorRef>
          </assembly>
        </build>
      </image>
    </images>
  </configuration>
</plugin>
    </plugins>
  </build>

</project>'

图像保存在docker存储库中，然后拉入集群。我已完全登录到docker和ibmcloud。每次容器重新启动6次，但始终不成功。我跑

mvn package

每次构建docker映像之前，我都要确保有一个jar可用，并且jar保存在名为mydb2jdbcproject-1的目标文件夹中

在Dockerfile中替换

COPY ${JAR_FILE} app.jar

与

---

相当尴尬的是，我没有意识到我需要用${jar_file}指向正确的jar文件。在确保它直接指向我的应用程序jar后，一切正常。谢谢

---

保存在这里，以备有人需要。

能否提供docker图像的输出。您能在docker中创建容器并在其中运行任何命令吗？有关docker最佳实践的更多信息，请参见：

COPY ${JAR_FILE} app.jar

COPY ${JAR_FILE} /app.jar