I am attempting to do a rolling update of a deployment and I am still getting about 2 seconds of downtime. Did I misconfigure my yaml? I am also using ambassador as the API gateway and not entirely sure whether the issue is in the API Gateway or in the deployment.

I wrote a simple shell script that runs a curl every second and I always have about 2 seconds of downtime with this config. Any help is much appreciated.

Here is my relevant config.

deployment Method:

kubectl apply -f MY_DEPLOYMENT.yaml

Deployment Snippet:

apiVersion: apps/v1 
kind: Deployment
metadata:
  name: web-service-rf
spec:
  selector:
    matchLabels:
      app: web-service-rf
  replicas: 2 # tells deployment to run 2 pods matching the template
  strategy:
    rollingUpdate:
      maxSurge: 4
      maxUnavailable: 0%

Liveness and Readiness Probe:

  livenessProbe:
    httpGet:
      path: /health/liveness
      port: 80
    initialDelaySeconds: 5
    periodSeconds: 3
  readinessProbe:
    httpGet:
      path: /health/readiness
      port: 80
    initialDelaySeconds: 5
    periodSeconds: 5
    successThreshold: 1