Java 如何在开发环境中使用maven docker来避免重复下载JAR?
这是我的Dockerfile,但是如果我更改了java代码,然后在terminal中输入“docker compose up-d--build”,maven将重新下载JAR,如何避免重复下载 Dockerfile:Java 如何在开发环境中使用maven docker来避免重复下载JAR?,java,maven,docker,docker-compose,development-environment,Java,Maven,Docker,Docker Compose,Development Environment,这是我的Dockerfile,但是如果我更改了java代码,然后在terminal中输入“docker compose up-d--build”,maven将重新下载JAR,如何避免重复下载 Dockerfile: FROM maven:3.5.0-jdk-8 WORKDIR /app COPY pom.xml . COPY src ./src RUN mvn verify ENTRYPOINT ["java","-jar","target/cloud-user.jar"] version:
FROM maven:3.5.0-jdk-8
WORKDIR /app
COPY pom.xml .
COPY src ./src
RUN mvn verify
ENTRYPOINT ["java","-jar","target/cloud-user.jar"]
version: "2"
services:
user:
build: user
volumes:
- $HOME/.m2/repository:/root/.m2/repository
- ./user/src:/app/src
ports:
- "8080:8080"
FROM maven:3.5.0-jdk-8
WORKDIR /app
COPY pom.xml .
COPY src ./src
ENTRYPOINT ["mvn","spring-boot:run"]
docker-compose.yml:
version: "2"
services:
cloud-nginx:
build: cloud-nginx
image: registry.cn-beijing.aliyuncs.com/wangdali/cloud-nginx
restart: always
ports: ["80:80"]
cloud-consul:
image: consul:0.9.2
command: consul agent -dev -client 0.0.0.0
cloud-front:
build: cloud-front
image: registry.cn-beijing.aliyuncs.com/wangdali/cloud-front
restart: always
volumes:
- ./cloud-front/static:/app
cloud-user:
build: cloud-user
image: registry.cn-beijing.aliyuncs.com/wangdali/cloud-user
restart: always
mysql:
image: mysql:5.7.19
hostname: mysql
volumes:
- ./docker/mysql/data:/var/lib/mysql
- ./docker/mysql/conf:/etc/mysql/conf.d
- /etc/localtime:/etc/localtime
ulimits:
nproc: 65535
mem_limit: 1024m
restart: always
environment:
MYSQL_ROOT_PASSWORD: root
ports:
- "3306:3306"
FROM maven:3.5.0-jdk-8
WORKDIR /app
COPY pom.xml .
COPY src ./src
ENTRYPOINT ["mvn","spring-boot:run"]
我简化了我的测试项目,然后使用maven的springboot插件 mvn spring启动:运行 要启动项目,现在先打开mount.m2文件夹,然后运行mvn命令。 但是在我修改java源代码后,它并没有被devtools自动加载,如何解决 这是我的Dockerfile/docker-compose.yml: Dockerfile:
FROM maven:3.5.0-jdk-8
WORKDIR /app
COPY pom.xml .
COPY src ./src
RUN mvn verify
ENTRYPOINT ["java","-jar","target/cloud-user.jar"]
version: "2"
services:
user:
build: user
volumes:
- $HOME/.m2/repository:/root/.m2/repository
- ./user/src:/app/src
ports:
- "8080:8080"
FROM maven:3.5.0-jdk-8
WORKDIR /app
COPY pom.xml .
COPY src ./src
ENTRYPOINT ["mvn","spring-boot:run"]
docker-compose.yml:
version: "2"
services:
cloud-nginx:
build: cloud-nginx
image: registry.cn-beijing.aliyuncs.com/wangdali/cloud-nginx
restart: always
ports: ["80:80"]
cloud-consul:
image: consul:0.9.2
command: consul agent -dev -client 0.0.0.0
cloud-front:
build: cloud-front
image: registry.cn-beijing.aliyuncs.com/wangdali/cloud-front
restart: always
volumes:
- ./cloud-front/static:/app
cloud-user:
build: cloud-user
image: registry.cn-beijing.aliyuncs.com/wangdali/cloud-user
restart: always
mysql:
image: mysql:5.7.19
hostname: mysql
volumes:
- ./docker/mysql/data:/var/lib/mysql
- ./docker/mysql/conf:/etc/mysql/conf.d
- /etc/localtime:/etc/localtime
ulimits:
nproc: 65535
mem_limit: 1024m
restart: always
environment:
MYSQL_ROOT_PASSWORD: root
ports:
- "3306:3306"
FROM maven:3.5.0-jdk-8
WORKDIR /app
COPY pom.xml .
COPY src ./src
ENTRYPOINT ["mvn","spring-boot:run"]
已解决,我将目标文件夹装载到容器中,它可以自动加载,这是最终的dockerfile和docker-compose.yml,当然,在生产环境中,我们不能写入: Dockerfile:
FROM maven:3.5.0-jdk-8
WORKDIR /app
COPY pom.xml .
COPY src ./src
RUN mvn verify
ENTRYPOINT ["java","-jar","target/cloud-user.jar"]
version: "2"
services:
user:
build: user
volumes:
- $HOME/.m2/repository:/root/.m2/repository
- ./user/src:/app/src
ports:
- "8080:8080"
FROM maven:3.5.0-jdk-8
WORKDIR /app
COPY pom.xml .
COPY src ./src
ENTRYPOINT ["mvn","spring-boot:run"]
docker-compose.yml
version: "2"
services:
user:
build: user
volumes:
- $HOME/.m2/repository:/root/.m2/repository
- ./user/target:/app/target
ports:
- "8080:8080"
- "5005:5005"
pom.xml:
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
<configuration>
<mainClass>cn.codeforfun.Application</mainClass>
<jvmArguments>-agentlib:jdwp=transport=dt_socket,server=y,suspend=n,address=5005</jvmArguments>
</configuration>
</plugin>
</plugins>
org.springframework.boot
springbootmaven插件
cn.codeforfun.Application
-agentlib:jdwp=transport=dt_套接字,服务器=y,挂起=n,地址=5005
将本地cach$HOME/.m2/存储库装载到docker映像中……但为什么要在docker容器中构建?为什么不简单地通过Dockerfile将最终生成的war/jar文件复制到Docker容器中呢?@khmarbaise最初,我想添加jar并在容器中运行它,但代码在开发过程中更改更频繁,而且过程似乎太单调乏味。然后我考虑将$HOME/.m2/存储库作为容器中的数据卷,但我尝试了很多次,在执行mvn verify之前,没有弄清楚如何将.m2目录装入容器。@khmarbaise非常感谢您的建议。使用docker compose,您可以为m2使用命名卷,因此您可以使用卷:(卷:\n-m2data:/root/.m2/repository)而不是装载自己的.m2目录,然后在卷部分下指定m2data。当您上下组合时,它将保持卷在周围,因此每个连续的开始都将重用您的依赖项。您可以手动删除卷,也可以通过向docker compose down命令添加-v来删除卷。希望我在没有格式的情况下有意义。@NielsBechNielsen非常感谢你。你的建议给了我很大的启发,我想我需要尝试更多次。