Deploy the SAPUI5 Frontend in SAP BTP, Kyma Runtime

1. Go to kyma-runtime-samples. This repository contains a collection of Kyma sample applications which will be used during the tutorial.

2. Use the Code button to choose one of the options to download the code locally, or simply run the following command in your CLI at your desired folder location:

   Shell/Bash

   Copy

   git clone https://github.com/SAP-samples/kyma-runtime-samples
   

1. Open the frontend-ui5-postgresql directory in your desired editor.

2. Explore the content of the sample.

   You can find many directories that relate to the UI5 application.

   The docker directory contains the Dockerfile used to generate the Docker image. The image is built in two stages to create a small image. In the first stage, a NodeJS image is used, which copies the related content of the project into the image and builds the application. The built application is then copied into an nginx image with the default setup exposing the application on port 80.

   Within the k8s directory, you can find the Kubernetes/Kyma resources you will apply to your SAP BTP, Kyma runtime.

Run the following commands from the frontend-ui5-postgresql directory using your CLI. Make sure to replace the value of <your-docker-id> with your Docker account ID.

If you’re using any device with a non-x86 processor (e.g. MacBook M1/M2) you need to instruct Docker to use x86 images by setting the DOCKER_DEFAULT_PLATFORM environment variable using the command export DOCKER_DEFAULT_PLATFORM=linux/amd64. Check Environment variables for more information.

1. To build the Docker image, run this command:

   Shell/Bash

   Copy

   docker build -t <your-docker-id>/fe-ui5-postgresql -f docker/Dockerfile .
   

2. To push the Docker image to your Docker repository, run this command:

   Shell/Bash

   Copy

   docker push <your-docker-id>/fe-ui5-postgresql
   

You can find the resource definitions in the k8s folder. If you performed any changes in the configuration, these files may also need to be updated. The folder contains the following files that are relevant to this tutorial:

• apirule.yaml: defines the API endpoint which exposes the application to the Internet. This endpoint does not define any authentication access strategy and should be disabled when not in use.
• configmap.yaml: defines API_URL, which represents the endpoint used for the orders API. It must be adjusted to reflect the domain of SAP BTP, Kyma runtime.
• deployment.yaml: defines the Deployment definition for the SAPUI5 application as well as a service used for communication. This definition references configmap.yaml by name. It is used to overwrite webapp/config.json of the application.

1. Within the project, open the k8s/configmap.yaml file and adjust API_URL to match the cluster domain:

   kind: ConfigMap
   apiVersion: v1
   metadata:
     name: fe-ui5-postgresql
     labels:
       app: fe-ui5-postgresql
   data:
     config.json: |-
       {
         "API_URL": "https://api-postgresql-go.*******.kyma.ondemand.com"
       }
   

2. Apply the ConfigMap:

   Shell/Bash

   Copy

   kubectl -n dev apply -f ./k8s/configmap.yaml
   

3. In deployment.yaml, adjust the value of spec.template.spec.containers.image to use your Docker image. Apply the Deployment:

   Shell/Bash

   Copy

   kubectl -n dev apply -f ./k8s/deployment.yaml
   

4. Apply the APIRule:

   Shell/Bash

   Copy

   kubectl -n dev apply -f ./k8s/apirule.yaml
   

To access the application, you can use the APIRule created in the previous step.

1. Open Kyma dashboard.

2. From the menu, choose Namespaces, and go to the dev namespace.

3. Choose Discovery and Network > API Rules.

4. Choose the Host entry for the fe-ui5-postgresql APIRule to open the application in the browser. This should be similar to:
   https://fe-ui5-postgresql.*******.kyma.ondemand.com