Introduction

If you want to push a docker image to Docker Hub repository, it can be achieved using docker maven plugin from fabric8.io. This plugin lets you build images, start and stop containers and push it to Docker repositories

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1. For the below example, I have used Spring Boot Rest service project which is connected to MongoDB. See below link for reference.
2. Using io.fabric8 plugin, under the plugin section add the io.fabric8 plugin
   

   <plugin>
   	<groupId>io.fabric8</groupId>
   	<artifactId>docker-maven-plugin</artifactId>
   	<version>0.20.0</version>....

   
   
3. We need to first build the image from Dockerfile, this plugin supports all the command which are in Dockerfile and you can directly create a docker image by giving arguments in pom.xml but In my view making docker images from Docker file is much easier and simpler. So we will ask maven plugin in below step to look for Dockerfile in root( project base directory)
   

   <name>springboot-mongo-dockerimage:${project.version}</name>
       <alias>springboot-mongo-dockerimage</alias>
   <build>
       <dockerFileDir>${project.basedir}</dockerFileDir>
   </build>

4. Next we specify the docker registry address
   

   <registry>registry.hub.docker.com/YOUR_DOCKER_HUB_USERNAME</registry>

5. Now we need to add authentication credentials in <authconfig> tag
   

   <authConfig>
   	<username>ENTER YOUR DOCKER HUB USERNAME LIKE abhishek</username>
   	<password>ENTER YOUR DOCKER HUB PASSWORD</password>
   </authConfig>

6. We will add execution phases, where we will push the image
   

   <execution>
   	<id>push</id>
   	<phase>post-integration-test</phase>
   	<goals>
   		<goal>push</goal>
   	</goals>
   </execution>

7. Now run the pom.xml using mvn clean install and check your docker hub repo after some time to see if image has been pushed. If you are pushing the image for first time its gonna take some time  depending on the size of image.

Here is the complete build section from the plugin, hope this help.

<build>
		<plugins>
			<plugin>
				<groupId>org.springframework.boot</groupId>
				<artifactId>spring-boot-maven-plugin</artifactId>
			</plugin>
			<plugin>
				<groupId>io.fabric8</groupId>
				<artifactId>docker-maven-plugin</artifactId>
				<version>0.20.0</version>
				<configuration>
					<registry>registry.hub.docker.com/YOUR_DOCKER_HUB_USERNAME</registry>

					<images>
						<image>
							<name>springboot-mongo-dockerhub:${project.version}</name>
							<alias>springboot-mongo-dockerhub</alias>
							<build>
								<dockerFileDir>${project.basedir}</dockerFileDir>

							</build>
							<run>
								<namingStrategy>alias</namingStrategy>
								<dependsOn>
									<container>mongo</container>
								</dependsOn>

								<links>
									<link>mongo</link>
								</links>
								<ports>
									<port>9876:8080</port>
								</ports>
								<log>
									<prefix>TC</prefix>
									<date>default</date>
									<color>cyan</color>
								</log>
							</run>
						</image>
					</images>
					<authConfig>
						<username>ENTER YOUR DOCKER HUB USERNAME LIKE abhishek</username>
						<password>ENTER YOUR DOCKER HUB PASSWORD</password>
					</authConfig>
				</configuration>

				<executions>
					<execution>
						<id>start</id>
						<phase>pre-integration-test</phase>
						<goals>
							<goal>stop</goal>
							<goal>build</goal>
							<goal>start</goal>
						</goals>
					</execution>
					<execution>
						<id>push</id>
						<phase>post-integration-test</phase>
						<goals>
							<goal>stop</goal>
							<goal>push</goal>
						</goals>
					</execution>
				</executions>
			</plugin>
		</plugins>
	</build>

The post How To Push Docker Images To Docker Hub Repository Using Docker Maven plugin appeared first on Little Big Extra.

Introduction

 The maven plugin for docker fabric8io/docker-maven-plugin helps us in building docker images and running containers. In case you are thinking about the difference between an image and container then please note that a running image is called container.

1. For below steps, I have used Spring Boot Rest service project which is connected to MongoDB. See below link for reference.

   Read Here: How to Connect to Spring Boot Rest Service Image to MongoDB

2. Using io.fabric8 plugin, under the plugin section add the io.fabric8 plugin
   

   <plugin>
   	<groupId>io.fabric8</groupId>
   	<artifactId>docker-maven-plugin</artifactId>
   	<version>0.20.0</version>....

3. We need to first build the image from Dockerfile, this plugin supports all the command which are in Dockerfile but I think making docker image from Docker file is much easier and simpler. So I telling the maven plugin in below step to look for Dockerfile in root( project base directory)
   

   <name>springboot-mongo-dockerimage:${project.version}</name>
       <alias>springboot-mongo-dockerimage</alias>
   <build>
       <dockerFileDir>${project.basedir}</dockerFileDir>
   </build>

4. Next step is to specify what docker container needs to do when it runs.
   1. Since we want to make sure that mongo DB container should be running before this image starts running. We add a tag called <dependsOn>.
   2. If the MongoDB is started we would like to link this container to Mongo so both can talk to each other, we specify that by adding a tag called <link>
      

      <dependsOn>
      	<container>mongo</container>
      </dependsOn>
      <links>
      	<link>mongo</link>
      </links>

   3. Next, we will specify on which port we would like to run this container and which port it should map to localhost machine
      

      <ports>
      <port>9876:8080</port>
      </ports>

   4. We enable all the logging using <log> tag, so we could see any errors or debug if some problem arises.
5. Next, we will add execution phases, we will cover these steps
   1. Remove an existing image, if it exists
   2. Build the Image
   3. Deploy the image
      

      <executions>
      	<execution>
      	        <id>start</id>
      		<phase>pre-integration-test</phase>
      		<goals>
                          <goal>stop</goal>
      		    <goal>build</goal>
      		    <goal>start</goal>
      							
      	</goals>
      </execution>

6. Now run this pom.xml using mvn clean install and check your docker containers so see if it running.

Here is the complete build section from the plugin, hope this help.

<build>
		<plugins>
			<plugin>
				<groupId>org.springframework.boot</groupId>
				<artifactId>spring-boot-maven-plugin</artifactId>
			</plugin>
			<plugin>
				<groupId>io.fabric8</groupId>
				<artifactId>docker-maven-plugin</artifactId>
				<version>0.20.0</version>
				<configuration>
					<!--<dockerHost>tcp://REMOTE_IP:2375</dockerHost>-->
					<images>
						<image>
							<name>springboot-mongo-dockerimage:${project.version}</name>
							<alias>springboot-mongo-dockerimage</alias>
							<build>
								<dockerFileDir>${project.basedir}</dockerFileDir>
 
							</build>
							<run>
								<namingStrategy>alias</namingStrategy>
								<dependsOn>
									<container>mongo</container>
								</dependsOn>
 
								<links>
									<link>mongo</link>
								</links>
								<ports>
									<port>9876:8080</port>
								</ports>
								<log>
									<prefix>TC</prefix>
									<date>default</date>
									<color>cyan</color>
								</log>
							</run>
 
						</image>
					</images>
				</configuration>
 
				<executions>
					<execution>
						<id>start</id>
						<phase>pre-integration-test</phase>
						<goals>
							<goal>stop</goal>
							<goal>build</goal>
							<goal>start</goal>
						</goals>
					</execution>
                               <!-- Uncommment this execution phase if you wan to remove container after testing ->
					<!--<execution>
						<id>clean image</id>
						<phase>post-integration-test</phase>
						<goals>
							<goal>stop</goal>
						</goals>
					</execution> -->
				</executions>
			</plugin>
		</plugins>
	</build>

The post Build and deploy Docker Image with Docker Maven plugin appeared first on Little Big Extra.