We have a GKE cluster with 4 deployments/pods that need to be updated when we deploy new code. I know it's best practice to deploy the image with the latest digest for the images we are deploying but I'm wondering if anyone knows of a better way of updating the yaml file with that digest other than manually updating it. I can get the fully_qualified_digest using:

gcloud container images describe gcr.io/xxxx/uwsgi

It really sucks to have to manually update yaml files with the latest digest hash each time we deploy. If someone knows a better way I'd love to hear it.

Side note: It's 2019 and Kubernetes should be able to grab the digest hash form /latest without having to explicitly define it.

apiVersion: extensions/v1beta1
kind: Deployment
metadata:
  creationTimestamp: null
  labels:
    io.kompose.service: uwsgi
  name: uwsgi
spec:
  replicas: 3
  strategy:
    type: RollingUpdate
    rollingUpdate:
      maxSurge: 1
      maxUnavailable: 0
  minReadySeconds: 5
  template:
    metadata:
      labels:
        io.kompose.service: uwsgi
    spec:
      containers:
      - env:
        - name: GOOGLE_APPLICATION_CREDENTIALS
          value: certs/gcp.json
        - name: ENV
          value: prod
        image: gcr.io/xxxx/uwsgi:latest <------ needs to be fully_qualified_digest
        name: uwsgi
        ports:
        - containerPort: 9040
        readinessProbe:
          httpGet:
            path: /health/
            port: 9040
          initialDelaySeconds: 5
          timeoutSeconds: 1
          periodSeconds: 15
        livenessProbe:
          httpGet:
            path: /health/
            port: 9040
          initialDelaySeconds: 60
          timeoutSeconds: 1
          periodSeconds: 15
        resources:
          requests:
            memory: "1000Mi"
            cpu: "1800m"
          limits:
            memory: "1200Mi"
            cpu: "2000m"
      hostname: uwsgi
      restartPolicy: Always
      terminationGracePeriodSeconds: 60
status: {}