gRPC liveness probe deployment sample. see https://kubernetes.io/docs/tasks/configure-pod-container/configure-liveness-readiness-startup-probes/#define-a-grpc-liveness-probe & https://kubernetes.io/docs/reference/command-line-tools-reference/feature-gates/

deploy.yaml

apiVersion: apps/v1
kind: Deployment
metadata:
  name: grpcserver
spec:
  selector:
    matchLabels:
      app: grpcserver
  replicas: 1
  template:
    metadata:
      labels:
        app: grpcserver
    spec:
      containers:
        - name: grpc-demo
          image: guitarrapc/csharp-lab:latest-grpc-grpcaspnetcore60.healthchecksupport
          imagePullPolicy: Always
          ports:
            - name: grpc-api
              containerPort: 80
          env:
            - name: POD_IP
              valueFrom:
                fieldRef:
                  fieldPath: status.podIP
          readinessProbe:
            grpc:
              port: 80
            initialDelaySeconds: 15
            periodSeconds: 5
          livenessProbe:
            grpc:
              port: 80
            initialDelaySeconds: 5
          resources:
            limits:
              cpu: 200m
              memory: 100Mi