[Test][KubeRay] Add doctest for RayCluster Quickstart doc (#51249)

Signed-off-by: Chi-Sheng Liu <chishengliu@chishengliu.com>

Author: MortalHappiness

.buildkite/kuberay.rayci.yml

@@ -19,6 +19,20 @@ steps:
       - forge
       - raycpubase
 
+  - label: ":kubernetes: kuberay doc tests"
+    tags:
+      - python
+      - docker
+    instance_type: medium
+    commands:
+      - bash ci/k8s/run-kuberay-doc-tests.sh
+    docker_network: "host"
+    depends_on:
+      - k8sbuild
+      - manylinux
+      - forge
+      - raycpubase
+
   - label: ":kubernetes: chaos {{matrix.workload}} under {{matrix.fault}}"
     key: kuberay_tests
     tags:

ci/k8s/prep-k8s-environment.sh

@@ -12,7 +12,11 @@ set -x # Be more verbose now.
 # Delete dangling clusters
 kind delete clusters --all
 
-# Create the cluster
+# Exit directly if SKIP_CREATE_KIND_CLUSTER is set
+if [[ -n "${SKIP_CREATE_KIND_CLUSTER:-}" ]]; then
+  echo "SKIP_CREATE_KIND_CLUSTER is set. Skipping creating kind cluster."
+  exit 0
+fi
 kind create cluster --wait 120s --config ci/k8s/kind.config.yaml
 
 # Verify the kubectl works

ci/k8s/run-kuberay-doc-tests.sh

@@ -0,0 +1,15 @@
+#!/bin/bash
+
+set -euo pipefail
+
+echo "--- Setup k8s environment"
+SKIP_CREATE_KIND_CLUSTER=1 bash ci/k8s/prep-k8s-environment.sh
+
+echo "--- Install Python dependencies"
+pip install -c python/requirements_compiled.txt pytest nbval bash_kernel
+python -m bash_kernel.install
+pip install "ray[default]==2.41.0"
+
+echo "--- Run doc tests"
+cd doc/source/cluster/kubernetes
+py.test --nbval getting-started/raycluster-quick-start.ipynb --nbval-kernel-name bash --sanitize-with doc_sanitize.cfg

doc/source/cluster/kubernetes/doc_sanitize.cfg

@@ -0,0 +1,27 @@
+[kuberay-operator-pod-name]
+regex: kuberay-operator-[a-z0-9]{10}-[a-z0-9]{5}
+replace: KUBERAY-OPERATOR-POD-NAME
+
+[raycluster-head-pod-name]
+regex: raycluster-kuberay-workergroup-worker-[a-z0-9]{5}
+replace: RAYCLUSTER-HEAD-POD-NAME
+
+[raycluster-worker-pod-name]
+regex: raycluster-kuberay-head-[a-z0-9]{5}
+replace: RAYCLUSTER-WORKER-POD-NAME
+
+[rayjob-submit-name]
+regex: raysubmit_[a-zA-Z0-9]{16}
+replace: RAYJOB-SUBMIT-NAME
+
+[time-duration]
+regex: \d+m\d+s|\d+m|\d+s
+replace: TIME-DURATION
+
+[python-logger-prefix]
+regex: \d{4}-\d{2}-\d{2}\s+\d{2}:\d{2}:\d{2},\d{3}\s+[A-Z]+\s+[\w\.]+:\d+\s+--
+replace: PYTHON-LOGGER-PREFIX
+
+[ray-cluster-resources-object-store-memory]
+regex: 'object_store_memory'\s*:\s*\d+(?:\.\d+)?\}
+replace: RAY-CLUSTER-RESOURCES-OBJECT-STORE-MEMORY

doc/source/cluster/kubernetes/getting-started.md

@@ -5,6 +5,7 @@
 ```{toctree}
 :hidden:
 
+getting-started/kuberay-operator-installation
 getting-started/raycluster-quick-start
 getting-started/rayjob-quick-start
 getting-started/rayservice-quick-start

doc/source/cluster/kubernetes/getting-started/kuberay-operator-installation.md

@@ -0,0 +1,42 @@
+(kuberay-operator-deploy)=
+
+# KubeRay Operator Installation
+
+## Step 1: Create a Kubernetes cluster
+
+This step creates a local Kubernetes cluster using [Kind](https://kind.sigs.k8s.io/). If you already have a Kubernetes cluster, you can skip this step.
+
+```sh
+kind create cluster --image=kindest/node:v1.26.0
+```
+
+## Step 2: Install KubeRay operator
+
+### Method 1: Helm (Recommended)
+
+```sh
+helm repo add kuberay https://ray-project.github.io/kuberay-helm/
+helm repo update
+# Install both CRDs and KubeRay operator v1.3.0.
+helm install kuberay-operator kuberay/kuberay-operator --version 1.3.0
+```
+
+### Method 2: Kustomize
+
+```sh
+# Install CRD and KubeRay operator.
+kubectl create -k "github.com/ray-project/kuberay/ray-operator/config/default?ref=v1.3.0"
+```
+
+## Step 3: Validate Installation
+
+Confirm that the operator is running in the namespace `default`.
+
+```sh
+kubectl get pods
+```
+
+```text
+NAME                                READY   STATUS    RESTARTS   AGE
+kuberay-operator-6bc45dd644-gwtqv   1/1     Running   0          24s
+```