Image Credit: https://github.com/GoogleContainerTools/jib
Building containerized applications require a lot of configurations. If you are building a Java application and planning to use Docker, you might need to consider Jib. Jib is an opensource plugin for Maven and Gradle. It uses the build information to build a Docker image without requiring a Dockerfile and Docker daemon. In this article, we will build a simple Spring Boot application with Jib Maven configuration to see Jib in action. The pom.xml configuration with Jib is given below.
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| <?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 https://maven.apache.org/xsd/maven-4.0.0.xsd"> | |
| <modelVersion>4.0.0</modelVersion> | |
| <parent> | |
| <groupId>org.springframework.boot</groupId> | |
| <artifactId>spring-boot-starter-parent</artifactId> | |
| <version>2.2.5.RELEASE</version> | |
| <relativePath /> | |
| <!– lookup parent from repository –> | |
| </parent> | |
| <groupId>org.smarttechie</groupId> | |
| <artifactId>jib-demo</artifactId> | |
| <version>0.0.1-SNAPSHOT</version> | |
| <name>jib-demo</name> | |
| <description>Demo project for Spring Boot</description> | |
| <properties> | |
| <java.version>1.8</java.version> | |
| </properties> | |
| <dependencies> | |
| <dependency> | |
| <groupId>org.springframework.boot</groupId> | |
| <artifactId>spring-boot-starter</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-test</artifactId> | |
| <scope>test</scope> | |
| <exclusions> | |
| <exclusion> | |
| <groupId>org.junit.vintage</groupId> | |
| <artifactId>junit-vintage-engine</artifactId> | |
| </exclusion> | |
| </exclusions> | |
| </dependency> | |
| </dependencies> | |
| <!– The below configuration is for Jib –> | |
| <build> | |
| <plugins> | |
| <plugin> | |
| <groupId>com.google.cloud.tools</groupId> | |
| <artifactId>jib-maven-plugin</artifactId> | |
| <version>2.1.0</version> | |
| <configuration> | |
| <to> | |
| <!– I configured Docker Image to be pushed to DockerHub –> | |
| <image>2013techsmarts/jib-demo</image> | |
| </to> | |
| <auth> | |
| <!– Used simple Auth mechanism to authorize DockerHub Push –> | |
| <username>xxxxxxxxx</username> | |
| <password>xxxxxxxxx</password> | |
| </auth> | |
| </configuration> | |
| </plugin> | |
| </plugins> | |
| </build> | |
| </project> |
After the above change, use the below Maven command to build the image and push that image to DockerHub. If you face any authentication issues with DockerHub, refer https://github.com/GoogleContainerTools/jib/tree/master/jib-maven-plugin#authentication-methods
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| mvn compile jib:build |
Now, pull the image which we created with the above command to run it.
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| docker image pull 2013techsmarts/jib-demo | |
| docker run -p 8080:8080 2013techsmarts/jib-demo |
That’s it. No more additional skill is required to create a Docker Image.
Siva Janapati is an Architect with experience in building Cloud Native Microservices architectures, Reactive Systems, Large scale distributed systems, and Serverless Systems. Siva has hands-on in architecture, design, and implementation of scalable systems using Cloud, Java, Go lang, Apache Kafka, Apache Solr, Spring, Spring Boot, Lightbend reactive tech stack, APIGEE edge & on-premise and other open-source, proprietary technologies. Expertise working with and building RESTful, GraphQL APIs. He has successfully delivered multiple applications in retail, telco, and financial services domains. He manages the GitHub(https://github.com/2013techsmarts) where he put the source code of his work related to his blog posts.
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