Containerlize Springboot Application

Containerlize by com.spotify Docker Plugins

Refer: https://www.cnblogs.com/ityouknow/p/8599093.html

Add Docker Support to 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 https://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
...
# 指定打包方式和包名
<artifactId>demo</artifactId>
<version>0.0.1-SNAPSHOT</version>
<packaging>jar</packaging>
...
<properties>
    # 指定 docker 鏡像使用的前綴 (imageName: emmettwoo/demo)
    <docker.image.prefix>emmettwoo</docker.image.prefix>
</properties>
...
<build>
    <plugins>
        <plugin>
            <groupId>com.spotify</groupId>
            <artifactId>docker-maven-plugin</artifactId>
            <version>1.0.0</version>
            <configuration>
                <imageName>${docker.image.prefix}/${project.artifactId}</imageName>
                # Dockerfile 在項目中的位置
                <dockerDirectory>src/main/docker</dockerDirectory>
                <resources>
                    <resource>
                        <targetPath>/</targetPath>
                        <directory>${project.build.directory}</directory>
                        <include>${project.build.finalName}.jar</include>
                    </resource>
                </resources>
            </configuration>
        </plugin>
    </plugins>
</build>
</project>

Add Dockerfile

FROM openjdk:8-jdk-alpine
VOLUME /tmp
ADD ./target/demo-0.0.1-SNAPSHOT.jar /app.jar
ENTRYPOINT ["java","-Djava.security.egd=file:/dev/./urandom","-jar","/app.jar"]

Build your image

# Build
mvn package docker:build
# Check
docker images | grep emmettwoo/demo

Start a new container

docker run -p 8080:8080 -d emmettwoo/demo

Containerlize by Server Image

Add Dockerfile

• FROM a server image, for example tomcat or jboss.
• ADD your distribute jar/war files.
• ENTRYPOINT could be re-defined if needed.
• run docker build to generate the new image.