java - Dockerfile在找不到Java类时失败，如何将类路径或jar指定给./mvnw？

Question

我正在从this链接中获取一个示例，该示例显示了如何开发一个简单的React / Spring-boot CRUD应用程序。效果很好。

现在，我正在尝试将其移至Docker容器中。我已经为“dev”配置文件成功完成了此操作，这是默认设置，但是该部分在构建中不包括React前端。

这是当前的Docker文件:

From openjdk:8
copy ./target/licensing-app-0.0.1-SNAPSHOT.jar licensing-app-0.0.1-SNAPSHOT.jar
copy ./mvnw mvnw
copy ./pom.xml .
copy ./.mvn/wrapper/maven-wrapper.properties .mvn/wrapper/maven-wrapper.properties
copy ./app .
#cmd ["java","-jar","licensing-app-0.0.1-SNAPSHOT.jar"]
cmd ./mvnw spring-boot:run -Pprod

现在，我想使用“prod”配置文件(包括前端)运行它。产品版本添加参数“-Pprod”

./mvnw spring-root:run -Pprod 

我将Dockerfile更改为从该命令开始，如下所示:

copy ./target/licensing-app-0.0.1-SNAPSHOT.jar licensing-app-0.0.1-SNAPSHOT.jar
copy ./mvnw mvnw
copy ./pom.xml .
COPY ./.mvn/wrapper/maven-wrapper.properties .mvn/wrapper/maven-wrapper.properties
copy ./app .
CMD ./mvnw spring-boot:run -Pprod

但是，当我运行它时，它因以下错误而失败:

licensing-app_1  | [WARNING] 
licensing-app_1  | java.lang.ClassNotFoundException: com.license.gen.app.LicenseGenApplication
licensing-app_1  |     at java.net.URLClassLoader.findClass (URLClassLoader.java:382)
licensing-app_1  |     at java.lang.ClassLoader.loadClass 

这似乎违反了jar文件的目的，因为它似乎需要目标目录的副本。但是我不知道如何指定.mvnw的类路径，而且似乎不需要该类路径。

我也尝试过运行标准的“java -jar myjar.jar -Pprod”命令，但它不执行yarn build部分。

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

    <groupId>com.okta.developer</groupId>
    <artifactId>licensing-app</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <packaging>jar</packaging>

    <name>license-gen</name>
    <description>Analytics License Gen App</description>

    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.1.0.RELEASE</version>
        <relativePath/> <!-- lookup parent from repository -->
    </parent>

    <properties>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
        <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
        <java.version>1.8</java.version>
        <frontend-maven-plugin.version>1.6</frontend-maven-plugin.version>
        <node.version>v10.13.0</node.version>
        <yarn.version>v1.12.1</yarn.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.boot</groupId>
            <artifactId>spring-boot-starter-security</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.security</groupId>
            <artifactId>spring-security-config</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.security</groupId>
            <artifactId>spring-security-oauth2-client</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.security</groupId>
            <artifactId>spring-security-oauth2-jose</artifactId>
        </dependency>
        <!-- For Java 8 Date/Time Support -->
        <!--test without this, originally from example online poll program -->
        <dependency>
            <groupId>com.fasterxml.jackson.datatype</groupId>
            <artifactId>jackson-datatype-jsr310</artifactId>
        </dependency>

        <!--<dependency>-->
        <!--<groupId>com.h2database</groupId>-->
        <!--<artifactId>h2</artifactId>-->
        <!--<scope>runtime</scope>-->
        <!--</dependency>-->
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <scope>runtime</scope>
        </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>com.fasterxml.jackson.core</groupId>
            <artifactId>jackson-databind</artifactId>
            <version>2.9.8</version>
        </dependency>
        <dependency>
            <groupId>com.github.oshi</groupId>
            <artifactId>oshi-core</artifactId>
            <version>3.4.0</version>
        </dependency>
        <dependency>
            <groupId>com.google.code.gson</groupId>
            <artifactId>gson</artifactId>
            <version>2.8.5</version>
        </dependency>
        <dependency>
            <groupId>com.amazonaws</groupId>
            <artifactId>aws-java-sdk</artifactId>
            <version>1.9.6</version>
        </dependency>

    </dependencies>

    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
            </plugin>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
                <configuration>
                    <mainClass>com.license.gen.app.LicenseGenApplication</mainClass>
                </configuration>
            </plugin>

        </plugins>
    </build>

    <profiles>
        <profile>
            <id>dev</id>
            <activation>
                <activeByDefault>true</activeByDefault>
            </activation>
            <properties>
                <spring.profiles.active>dev</spring.profiles.active>
            </properties>
        </profile>
        <profile>
            <activation>
                <activeByDefault>false</activeByDefault>
            </activation>
            <id>prod</id>
            <build>
                <plugins>
                    <plugin>
                        <artifactId>maven-resources-plugin</artifactId>
                        <executions>
                            <execution>
                                <id>copy-resources</id>
                                <phase>process-classes</phase>
                                <goals>
                                    <goal>copy-resources</goal>
                                </goals>
                                <configuration>
                                    <outputDirectory>${basedir}/target/classes/static</outputDirectory>
                                    <resources>
                                        <resource>
                                            <directory>app/build</directory>
                                        </resource>
                                    </resources>
                                </configuration>
                            </execution>
                        </executions>
                    </plugin>
                    <plugin>
                        <groupId>com.github.eirslett</groupId>
                        <artifactId>frontend-maven-plugin</artifactId>
                        <version>${frontend-maven-plugin.version}</version>
                        <configuration>
                            <workingDirectory>app</workingDirectory>
                        </configuration>
                        <executions>
                            <execution>
                                <id>install node</id>
                                <goals>
                                    <goal>install-node-and-yarn</goal>
                                </goals>
                                <configuration>
                                    <nodeVersion>${node.version}</nodeVersion>
                                    <yarnVersion>${yarn.version}</yarnVersion>
                                </configuration>
                            </execution>
                            <execution>
                                <id>yarn install</id>
                                <goals>
                                    <goal>yarn</goal>
                                </goals>
                                <phase>generate-resources</phase>
                            </execution>
                            <execution>
                                <id>yarn test</id>
                                <goals>
                                    <goal>yarn</goal>
                                </goals>
                                <phase>test</phase>
                                <configuration>
                                    <arguments>test</arguments>
                                    <environmentVariables>
                                        <CI>true</CI>
                                    </environmentVariables>
                                </configuration>
                            </execution>
                            <execution>
                                <id>yarn build</id>
                                <goals>
                                    <goal>yarn</goal>
                                </goals>
                                <phase>compile</phase>
                                <configuration>
                                    <arguments>build</arguments>
                                </configuration>
                            </execution>
                        </executions>
                    </plugin>
                </plugins>
            </build>
            <properties>
                <spring.profiles.active>prod</spring.profiles.active>
            </properties>
        </profile>
    </profiles>
</project>

解决方案:我使用mvn来运行它，因为我曾尝试使用“P”参数对java进行多种变体，但是没有运气。幸运的是，有人删除了该注释，因为该注释已在jar文件前以“P”参数运行。那没有用，但是可以:cmd [“java”，“-Dspring.profiles.active = prod”，“-jar”，“licensing-app-0.0.1-SNAPSHOT.jar”]。

Answer 1

如果您已经将jar的副本复制到了容器中，为什么还要尝试再次编译项目？

我认为您可以仅使用CMD运行jar文件。

但是，如果要使容器编译项目，只需复制源文件，然后编译并运行jar。

尝试类似的东西:

From openjdk:8
CPOY ./app .
RUN ./mvnw clean install -Pprod
WORKDIR /target
CMD ["java","-jar","licensing-app-0.0.1-SNAPSHOT.jar"]