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How to Set Up a Kubernetes Development Environment

Requirements

First, you should consult the Developer Guide for instructions on how to set up your initial development environment. Once you have completed that step, you can proceed with the following.

Prepare the Kubernetes cluster

We suggest using kind to locally create a simulated K8s cluster. You can follow the installation guide for instructions on how to install it. Additionally, we have provided you with the scripts/k8s/create-kind-cluster.sh script to create a kind K8s cluster. This script will utilize Docker to create a local cluster named pluto. In the Docker dashboard, you will find a container named pluto-control-plane.

Configure the Kubernetes Cluster

We provides the scripts for configuring the K8s cluster. These scripts can be found in the scripts/k8s directory. To configure the K8s cluster, you can execute the install-knative.sh script. This script primarily performs the following tasks:

Install Knative Serving

kubectl apply -f https://github.com/knative/serving/releases/download/knative-v1.11.1/serving-crds.yaml
kubectl apply -f https://github.com/knative/serving/releases/download/knative-v1.11.1/serving-core.yaml
kubectl apply -f https://github.com/knative/net-kourier/releases/download/knative-v1.11.2/kourier.yaml
kubectl patch configmap/config-network \
  --namespace knative-serving \
  --type merge \
  --patch '{"data":{"ingress-class":"kourier.ingress.networking.knative.dev"}}'

Install Knative Eventing

kubectl apply -f https://github.com/knative/eventing/releases/download/knative-v1.11.3/eventing-crds.yaml
kubectl apply -f https://github.com/knative/eventing/releases/download/knative-v1.11.3/eventing-core.yaml

Install ResourceStreamSource add-on

In Pluto, we utilize Redis as the event source. Therefore, it is necessary to install the Redis source add-on.

kubectl apply -f https://github.com/knative-sandbox/eventing-redis/releases/download/knative-v1.11.0/redis-source.yaml

Install NGINX Ingress

At Pluto, we utilize the NGINX ingress controller to combine multiple Knative services. Therefore, it is necessary to install the NGINX ingress controller.

kubectl apply -f https://raw.githubusercontent.com/kubernetes/ingress-nginx/controller-v1.8.2/deploy/static/provider/cloud/deploy.yaml

Disable tag resolution for the local registry

If you have used "kind" to create a local simulation of a K8s cluster, it is necessary to disable tag resolution for the local registry. Otherwise, the image will not be found during the deployment of the Knative service.

kubectl patch configmap config-deployment -n knative-serving  --patch '{"data": {"registriesSkippingTagResolving": "localhost:5001"}}'

Disable scale to zero.

Currently, Pluto is unable to route traffic from NGINX Ingress to a Knative service when the service instance count is zero. If you would like to address this issue, please don't hesitate to open an issue or submit a pull request.

kubectl patch configmap config-autoscaler -n knative-serving  --patch '{"data": {"enable-scale-to-zero": "false"}}'