java项目打包成Dockerfile镜像启动

pom文件中增加配置

 <properties>
        <maven.compiler.source>17</maven.compiler.source>
        <maven.compiler.target>17</maven.compiler.target>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
        <docker.image>docker_storage</docker.image>
    </properties>

    <build>
        <finalName>black-news-user</finalName>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
                <executions>
                    <execution>
                        <goals>
                            <goal>repackage</goal>
                        </goals>
                    </execution>
                </executions>
            </plugin>
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-compiler-plugin</artifactId>
                <version>3.7.0</version>
                <configuration>
                    <source>17</source>
                    <target>17</target>
                </configuration>
            </plugin>
            <plugin>
                <groupId>com.spotify</groupId>
                <artifactId>dockerfile-maven-plugin</artifactId>
                <version>1.3.6</version>
                <configuration>
                    <repository>${docker.image}/${project.artifactId}</repository>
                    <buildArgs>
                        <JAR_FILE>target/${project.build.finalName}.jar</JAR_FILE>
                    </buildArgs>
                </configuration>
            </plugin>
        </plugins>
    </build>

在项目根目录下增加Dockerfile文件，没有后缀

比如我的项目是black-news-freemarker，在与target平级的目录下创建Dockerfile

# 设置JAVA版本
FROM meddream/jdk17
# 指定存储卷, 任何向/tmp写入的信息都不会记录到容器存储层
VOLUME /tmp
# 拷贝运行JAR包
ARG JAR_FILE
COPY ${JAR_FILE} app.jar
# 设置JVM运行参数， 这里限定下内存大小，减少开销
ENV JAVA_OPTS="\
-server \
-Xms256m \
-Xmx512m \
-XX:MetaspaceSize=256m \
-XX:MaxMetaspaceSize=512m"
#空参数，方便创建容器时传参
ENV PARAMS=""
# 入口点， 执行JAVA运行命令
ENTRYPOINT ["sh","-c","java -jar $JAVA_OPTS /app.jar $PARAMS"]

打包镜像

docker build --build-arg JAR_FILE=target/black-news-freemarker.jar -t black-image-name .

启动容器

docker run -d --name bbb -p 8881:8881 black-image-name