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fix: add kube impl for discovery and add metadata endpoint (#4136)  
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# SPDX-FileCopyrightText: Copyright (c) 2025 NVIDIA CORPORATION & AFFILIATES. All rights reserved.
# SPDX-License-Identifier: Apache-2.0

apiVersion: nvidia.com/v1alpha1
kind: DynamoGraphDeployment
metadata:
  name: dynamo
  labels:
    nvidia.com/dynamo-discovery-backend: kubernetes
spec:
  envs:
  - name: DYN_LOG
    value: "debug"
  services:
    Frontend:
      dynamoNamespace: dynamo
      componentType: frontend
      replicas: 1
      envs:
        - name: DYN_SYSTEM_PORT
          value: "9090"
      extraPodSpec:
        mainContainer:
          image: ${IMAGE}
    VllmDecodeWorker:
      dynamoNamespace: vllm-disagg
      componentType: backend
      replicas: 1
      resources:
        limits:
          gpu: "1"
      envs:
        - name: DYN_SYSTEM_PORT
          value: "9090"
        - name: DYN_SYSTEM_STARTING_HEALTH_STATUS
          value: "notready"
        - name: DYN_SYSTEM_USE_ENDPOINT_HEALTH_STATUS
          value: "[\"generate\", \"clear_kv_blocks\"]"
      readinessProbe:
        httpGet:
          path: /health
          port: 9090
        initialDelaySeconds: 60
        periodSeconds: 10
        timeoutSeconds: 5
        failureThreshold: 60
      livenessProbe:
        httpGet:
          path: /live
          port: 9090
        initialDelaySeconds: 60
        periodSeconds: 10
        timeoutSeconds: 5
        failureThreshold: 60
      extraPodSpec:
        terminationGracePeriodSeconds: 120
        mainContainer:
          image: ${IMAGE}
          workingDir: /workspace/components/backends/vllm
          command:
          - python3
          - -m
          - dynamo.vllm
          args:
            - --model
            - Qwen/Qwen3-0.6B
    VllmPrefillWorker:
      dynamoNamespace: vllm-disagg
      componentType: prefill
      replicas: 1
      resources:
        limits:
          gpu: "1"
      envs:
        - name: DYN_SYSTEM_PORT
          value: "9090"
        - name: DYN_SYSTEM_STARTING_HEALTH_STATUS
          value: "notready"
        - name: DYN_SYSTEM_USE_ENDPOINT_HEALTH_STATUS
          value: "[\"generate\", \"clear_kv_blocks\"]"
      readinessProbe:
        httpGet:
          path: /health
          port: 9090
        initialDelaySeconds: 60
        periodSeconds: 10
        timeoutSeconds: 5
        failureThreshold: 60
      livenessProbe:
        httpGet:
          path: /live
          port: 9090
        initialDelaySeconds: 60
        periodSeconds: 10
        timeoutSeconds: 5
        failureThreshold: 60
      extraPodSpec:
        terminationGracePeriodSeconds: 120
        mainContainer:
          image: ${IMAGE}
          workingDir: /workspace/components/backends/vllm
          command:
          - python3
          - -m
          - dynamo.vllm
          args:
            - --model
            - Qwen/Qwen3-0.6B
            - --is-prefill-worker