Deploy serverless workloads

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Prerequisite: For this lab, ArgoCD needs to be activated.

Otomi uses Knative serving for serverless (or Function as a Service) support.

As a developer, you'll have the following options to deploy serverless workloads:

• BYO Knative service manifest and deploy it using kubectl or ArgoCD
• Create workloads with the deployment Helm chart in otomi-charts
• Create workloads with the Knative Helm chart in otomi-charts

In this lab we're going to create a workload in Otomi to create a Knative service using the knative chart in otomi-charts.

Create a Function as a Service workload

You can create a workload to deploy your own Helm chart, or you can use one of the otomi-charts Helm charts. In this case we'll use the deployment chart in the otomi-charts repository.

1. Go to Workloads in the right menu and click on New Workload

2. Choose Function as a Service

3. Enter a name for the workload

hello-ksvc

4. Fill in the image to deploy:

otomi/nodejs-helloworld

5. Fill in the tag of the image to deploy:

v1.2.13

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Note: When creating a Function as a Service workload, the Min Instances will by default be set to 0 to enable Scale to Zero.

6. Click Next

7. Review the values. Here you can add more values supported by the otomi-charts

8. Click Submit

Now click on Deploy Changes

After a few minutes, Otomi will have created all the needed ArgoCD resources to deploy your workload. In the workloads list, click on the Application link of your workload to see the status of your workload.

The values of a workload can be changed at any time. Changes will automatically be deployed.

(optionally) Publicly expose the service

• In the left menu panel under click Services then click on Create Service

• Select the name of the (existing) knative service: hello-ksvc

• Under Exposure Ingress, select Ingress and use the default configuration

• Click on Submit

• Click on Deploy Changes (the Deploy Changes button in the left panel will light-up after you click on submit).