native-grpc-health-check

Integrate Online Boutique with native gRPC probes

The current container images of the Online Boutique apps contains the grpc-health-probe binary in order to have their liveness and readiness probes working on Kubernetes. But, since Kubernetes 1.24, gRPC container probes feature is in beta, and this binary could be removed from the container images and the associated Deployment manifests can directly use the new gRPC probes (liveness and readiness).

Deploy Online Boutique integrated with native gRPC probes

To automate the deployment of Online Boutique integrated with native gRPC probes you can leverage the following variation with Kustomize.

From the kustomize/ folder at the root level of this repository, execute this command:

ONLINE_BOUTIQUE_VERSION=$(curl -s https://api.github.com/repos/GoogleCloudPlatform/microservices-demo/releases | jq -r '[.[]] | .[0].tag_name')
sed -i "s/ONLINE_BOUTIQUE_VERSION/$ONLINE_BOUTIQUE_VERSION/g" components/native-grpc-health-check/kustomization.yaml
kustomize edit add component components/native-grpc-health-check

Note: we are applying the -native-grpc-probes tag suffix to all the container images, it's a prebuilt image without the grpc-health-probe binary since the version 0.4.0 of Online Boutique.

This will update the kustomize/kustomization.yaml file which could be similar to:

apiVersion: kustomize.config.k8s.io/v1beta1
kind: Kustomization
resources:
- base
components:
- components/native-grpc-health-check

You can locally render these manifests by running kubectl kustomize . as well as deploying them by running kubectl apply -k ..

Resources

• gRPC health probes with Kubernetes 1.24+ with Online Boutique
• Kubernetes 1.24: gRPC container probes in beta
• Define a gRPC liveness probe