6.4. Creating serverless applications using YAML
To create a serverless application by using YAML, you must create a YAML file that defines a Service, then apply it by using oc apply.
Procedure
Create a YAML file, then copy the following example into the file:
apiVersion: serving.knative.dev/v1 kind: Service metadata: name: hello namespace: default spec: template: spec: containers: - image: docker.io/openshift/hello-openshift env: - name: RESPONSE value: "Hello Serverless!"Navigate to the directory where the YAML file is contained, and deploy the application by applying the YAML file:
$ oc apply -f <filename>
After the Service is created and the application is deployed, Knative creates an immutable Revision for this version of the application.
Knative also performs network programming to create a Route, Ingress, Service, and load balancer for your application and automatically scales your pods up and down based on traffic, including inactive pods.
