Deploy the Entity Relationship generator for SAP Ariba Analytical Reporting API application to the SAP BTP, Kyma runtime environment
In a previous blog post, I covered how we can generate an Entity-Relationship (ER) diagram from the metadata returned by the SAP Ariba Analytical Reporting API. In this blog post, I will show how the application, with minor enhancements, can be deployed to the SAP BTP, Kyma runtime environment.
The code and deployment instructions below can be found in the SAP Ariba Extensibility samples repository – https://github.com/SAP-samples/ariba-extensibility-samples/tree/main/topics/apis/er-generator/kyma
- Clone the SAP Ariba extensibility samples repository.
$ git clone email@example.com:SAP-samples/ariba-extensibility-samples.git # If you've cloned it before, make sure to pull the latest changes $ git pull origin main
- Familiarity with Docker and Kubernetes.
- An SAP BTP trial account. Make sure to enable to the SAP BTP, Kyma runtime environment.
- Get a Free account on SAP BTP trial: https://developers.sap.com/tutorials/hcp-create-trial-account.html
- Enable SAP BTP, Kyma Runtime tutorial – https://developers.sap.com/tutorials/cp-kyma-getting-started.html
- Install the Kubernetes command line tool and setup kubeconfig – https://developers.sap.com/tutorials/cp-kyma-download-cli.html
Below, the steps that we will follow to deploy the application to the SAP BTP, Kyma runtime environment:
- Create a docker image
- Push the docker image to a private registry
- Create secret in Kyma with the private docker registry credentials
- Deploy the application to the SAP BTP, Kyma runtime environment
Step 1 – Create a docker image
A Dockerfile is now included in the er-generator folder. You can build the docker image and communicate with the program via your browser.
# Navigate to the er-generator folder $ cd ariba-extensibility-samples/topics/apis/er-generator # Build docker image $ docker build --tag er-generator . # Run docker image $ docker run -p 8080:5000 er-generator
Once the docker container is running, you can call the program from your web browser
- Get all document types: http://localhost:8080/documentTypes
- Get diagram for a document type: http://localhost:8080/documentTypes/CatalogReportingEntryFact/diagram
Step 2 – Push the docker image to a private registry
Before deploying our application to tthe SAP BTP, Kyma runtime environment, we will need to host the image in a private repository. To do that we will login to the private repo locally, tag the image previously created with the private repo details and then push it.
# Login to private repo locally $ docker login --username user registry.mycompany.com # Tag previously created image with repo $ docker tag [IMAGE_ID] registry.mycompany.com/ariba-reporting-er-generator # Push to private repo $ docker push registry.mycompany.com/ariba-reporting-er-generator
In the script above I’m using the registry.mycompany.com value to represent the address of a private docker registry. You will need to replace this value with the address of your private registry. In my case, I self-host a docker registry in my home server, which has access from the internet and I’m pushing the docker image there.
Step 3 – Create secret in Kyma with the private docker registry credentials
To allow communication from our SAP BTP, Kyma runtime environment to the private docker registry, we will create a secret in Kubernetes. This secret will be specified in the deployment yaml (L24-25) to know the secret used to pull the image.
# Create secret to login to the private repository $ kubectl create secret docker-registry docker-registry-secret --docker-server=registry.mycompany.com --docker-username=user --docker-password=StrongP4$sw0rd1 --firstname.lastname@example.org --namespace=default
In the command above we specify the following:
- Private docker registry address
- Username and password
- Email address
- Namespace where the secret will be deployed to
Step 4 – Deploy the application to the SAP BTP, Kyma runtime environment
The kyma folder included in the er-generator includes the yaml files need to deploy the application. We need to rename the remove the .sample extension from the files and replace the registry.mycompany.com value (L21) in the deployment.yml file with the address of our private docker registry.
Now we are able to deploy the docker image to the SAP BTP, Kyma runtime environment.
# Apply deployment, service and API rule $ kubectl apply -f kyma/deployment.yml $ kubectl apply -f kyma/service.yml $ kubectl apply -f kyma/api-rule.yml
Once deployed we can check the components in the SAP BTP, Kyma runtime environment.
Once the deployment is successful, you can call the program from your web browser
- Get all document types: https://ariba-reporting-er-generator-service.c-0eab972.kyma.shoot.live.k8s-hana.ondemand.com/documentTypes
- Get diagram for a document type: https://ariba-reporting-er-generator-service.c-0eab972.kyma.shoot.live.k8s-hana.ondemand.com/documentTypes/ContractWorkspaceFact/diagram
I hope this blog post helps you get initiated with deploying applications to SAP BTP, Kyma runtime. In the end, if you are familiar with Docker and Kubernetes, it will be simple for you to deploy and expose your applications to the SAP BTP, Kyma runtime environment.