no main manifest attribute, in /app/app.jar

一 概述

        今天在发布项目到docker容器中的时候，项目启动没有报错，但是日志提示：

no main manifest attribute, in /app/app.jar

二 修复

        增加配置：

 <build>
        <finalName>${project.name}</finalName>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
                <executions>
                    <execution>
                        <phase>package</phase>
                        <goals>
                            <goal>repackage</goal>
                        </goals>
                    </execution>
                </executions>
                <configuration>
                    <includeSystemScope>true</includeSystemScope>
                    <--指定主类-->
                    <mainClass>com.**.**.xxxApplication</mainClass>
                </configuration>
            </plugin>

            <plugin>
                <groupId>com.spotify</groupId>
                <artifactId>dockerfile-maven-plugin</artifactId>
                <dependencies>
                    <dependency>
                        <groupId>javax.activation</groupId>
                        <artifactId>activation</artifactId>
                        <version>1.1.1</version>
                    </dependency>
                </dependencies>
                <configuration>
                    <repository>${project.artifactId}</repository>
                    <buildArgs>
                        <JAR_FILE>target/${project.build.finalName}.jar</JAR_FILE>
                    </buildArgs>
                </configuration>
            </plugin>
        </plugins>
    </build>

        注意增加项目名称信息

<name>api-thirdparty</name>

        补充dockerfile配置：

FROM openjdk:8-jdk-alpine
COPY ./target/*.jar /app/app.jar
# ENTRYPOINT ["java","-Xmx500m","-jar","/app/app.jar"]
ENTRYPOINT ["java","-Xmx500m","-jar","-Dspring.profiles.active=dev","/app/app.jar"]
EXPOSE 端口号如：8168

        如有更多细节后续补充。。。