Mule Runtime (or Mule) is a lightweight integration engine that runs Mule apps. Rather than creating multiple point-to-point integrations between systems, services, APIs, and devices, Mule apps manage message routing, data mapping, orchestration, reliability, security, and scalability between nodes.

A container is a standard unit of software that packages up code and all its dependencies so the application runs quickly and reliably from one computing environment to another. A Docker container image is a lightweight, standalone, executable package of software that includes everything needed to run an application: code, runtime, system tools, system libraries, and settings.

In this tutorial, we will build a Mule4 image and run a Hello World on Docker

Versions used: Mule Runtime 4.1.4, CentOS 7, Docker version 18.09.0-beta3, build 7718f80

Part 1: Create a HelloWorld application in Anypoint Studio

Step 1: Download Anypoint Studio from https://www.mulesoft.com/lp/dl/studio.

Step 2: Create a New Mule Project.

Mule 4 Image with HelloWorld App and Run Docker Container - Screenshot 1

Step 2a: Expand the project. Click on the helloworld.xml file. On the right-hand side, you will notice the Mule Palette. Drag and Drop the Listener (HTTP) and SetPayload(Core) in sequence to the Message Flow pane that’s in the middle of the following diagram.

Mule 4 Image with HelloWorld App and Run Docker Container - Screenshot 2

Step 3: Configure the Listener.

Leave the default configuration as is and Enter “/” in the Base Path. Do a Test Connection.

Mule 4 Image with HelloWorld App and Run Docker Container - Screenshot 3

Step 4: Configure Set Payload.

Click on Set Payload and enter something of your choice.

Mule 4 Image with HelloWorld App and Run Docker Container - Screenshot 4

Step 5: Time to run the app. Right-click on the Project hello world -> Run As -> Mule Application.

Mule 4 Image with HelloWorld App and Run Docker Container - Screenshot 5

Yes, Mule is up and kicking.

Step 6: Open a browser and type http://localhost:8085.

Mule 4 Image with HelloWorld App and Run Docker Container - Screenshot 6

Step 7: Export in Zip Format.

Click File > Export and General > Archive File and click Next

Mule 4 Image with HelloWorld App and Run Docker Container - Screenshot 7

Part 2: Build Mule 4 Image and Run the HelloWorld application in a Docker Container

Step 1: Download and install Docker CE for CentOS 7 https://docs.docker.com/install/linux/docker-ce/centos/#install-docker-ce.

$ sudo yum install docker-ce
$ sudo systemctl start docker

Step 2: Verify that the docker is installed correctly by running the hello-world image.

Mule 4 Image with HelloWorld App and Run Docker Container - Screenshot 8

Step 3: Docker post-installation tasks to add $USER to the Docker group.

Mule 4 Image with HelloWorld App and Run Docker Container - Screenshot 9

Step 4: Download Mule 4 EE Standalone from https://docs.mulesoft.com/mule-runtime/4.1/runtime-installation-task.

*You need to have a support account to download. Free or Trial account does not have permission to download. Upload the file to the CentOS VM.

Step 5: Upload the license.lic file to the VM. If you don’t have a license file, then you need to comment on the license section from the Dockerfile. Mule will use a trial license internally.

Step 6: Upload the helloworld.zip file.

Step 7: Create a Dockerfile and paste the following content. Upload the Dockerfile to VM.

Download the docker file from here.

Mule 4 Image with HelloWorld App and Run Docker Container - Screenshot 10

Step 8: Now, you are ready to build the image.

Mule 4 Image with HelloWorld App and Run Docker Container - Screenshot 11
Mule 4 Image with HelloWorld App and Run Docker Container - Screenshot 12

Step 9: Check the Built image.

Mule 4 Image with HelloWorld App and Run Docker Container - Screenshot 13

Step 10: Let’s get Mule up and kicking.

Running Mule on the foreground.

Mule 4 Image with HelloWorld App and Run Docker Container - Screenshot 14
Mule 4 Image with HelloWorld App and Run Docker Container - Screenshot 15

You can do Ctrl+X to exit and Run Mule in Background.

Mule 4 Image with HelloWorld App and Run Docker Container - Screenshot 16

Verify the container status (N: B You can docker user group.

Mule 4 Image with HelloWorld App and Run Docker Container - Screenshot 17

Step 11: Stopping MuleWe can get inside the container and issue a ./Mule stop command from the /bin directory or you can simply remove the container.

Mule 4 Image with HelloWorld App and Run Docker Container - Screenshot 18

If you have any questions or concerns, please put them in the comment section below, or reach out to us here.

Share This