5-deploy-quarkus-functions.adoc

5. Deploy the function to Red Hat OpenShift Serverless

You’ll use the Developer Sandbox to deploy a Quarkus function. The sandbox allows developers to access Red Hat’s products and technologies without setup or configuration, and start developing quicker than ever before with our new sandbox environments for Red Hat OpenShift and CodeReady Workspaces. Try your hand at the technologies with our library of activities as well. You need to sign up the Red Hat Developer Program first to provision a free sandbox. It will take less than 5 min from sign up to create a new cluster along the way.

Add an OpenShift and Knative Funqy extensions then remove an existing AWS extension:

quarkus ext add quarkus-funqy-knative-events quarkus-openshift

quarkus ext remove quarkus-funqy-amazon-lambda

Update the application.properties for OpenShift Serverless deployment:

Note	Replace username with your own account in the developer sandbox.

quarkus.container-image.group=username-dev
quarkus.container-image.registry=image-registry.openshift-image-registry.svc:5000
quarkus.kubernetes-client.trust-certs=true
quarkus.kubernetes.deploy=true
quarkus.kubernetes.deployment-target=knative

Note	If you want to use your own OpenShift cluster, you need to install OpenShift Serverless Operator and Knative-Serving. Find more information here.

Make sure to log in the Developer Sandbox:

Click on DevSandbox then click on Display Token. It will show Log in with this token.

Copy the oc login command then paste it in your working terminal.

Run the following Maven command to deploy the function to OpenShift Serverless:

quarkus build --no-tests

Or run the following maven package command:

./mvnw clean package -DskipTests

The output will end with BUILD SUCCESS. You can overwrite the pod label to show the Quarkus icon by running the following oc command:

oc label rev/enter-serverless-function-00001 app.openshift.io/runtime=quarkus --overwrite

If you deployed the function multiple times, the revision number (e.g. 00001) should be different.

Add the function icon to the Knative service by running the following oc command:

oc label ksvc/enter-serverless-function boson.dev/function=true --overwrite

Go to the Topology view in OpenShift Developer console:

You might see the pod is already terminated since the scale-down-to-zero is 30 seconds by default in Knative Serving.

Copy the Route URL in Resource tab menu then invoke the function using HTTPie:

echo '"Daniel Oh"' | http https://enter-serverless-function-doh-dev.apps.sandbox-m2.ll9k.p1.openshiftapps.com

The output should look like:

HTTP/1.1 200 OK
content-length: 52
content-type: application/json
date: Wed, 2 Nov 2022 17:53:33 GMT
server: envoy
set-cookie: f301134c73b56fb5a7c418e831b3c2ee=a4a6175a464d76be57ebe4bdabb3decd; path=/; HttpOnly
x-envoy-upstream-service-time: 23

"Enter Serverless Functions with Quarkus, Daniel Oh"

You can also use curl command to access the endpoint:

curl -X POST -H "Content-Type: application/json" -d '"Daniel Oh"' https://enter-serverless-function-doh-dev.apps.sandbox-m2.ll9k.p1.openshiftapps.com ; echo

When you got back to the Topology view, you will see the Quarkus pod is automatically scaled up in a second:

Note	When you deploy a native executable, the build will take more than 5 mins to finish. You might also have an out of memory error. To fix it, make sure to set Dquarkus.native.native-image-xmx=4g.

➡️ 6. Generate a new function project using Kn func CLI

⬅️ 4. Optimize the function and make it portable using Quarkus Funqy