I am running a java application on tomcat in a k8s cluster, I am using a prestop lifecycle hook to run /usr/local/tomcat/bin/shutdown.sh before the container gets terminated. Also defining a termination grace period of 60 secs.

expected behaviour: tomcat shutsdown gracefully when I kill a pod or delete a deployment.

actual behaviour: tomcat shutsdown abruptly.

Any thoughts? Thanks in advance.

apiVersion: apps/v1
kind: Deployment
metadata:
  name: sample
  annotations:
spec:
  replicas: 2
  selector:
    matchLabels:
      app: sample
      name: sample
  template:
    metadata:
      labels:
        app: sample
        name: sample
    spec:
      hostname: sample-web
      terminationGracePeriodSeconds: 60
      volumes:
       - name: splunk-inputs
         configMap:
           name: splunk-conf
           items:
           - key: inputs.conf
             path: ./inputs.conf
       - name: splunk-outputs
         configMap:
           name: splunk-conf
           items:
           - key: outputs.conf
             path: ./outputs.conf
       - name: docker-socket
         hostPath:
          path: /var/run/docker.sock
       - name: tomcat-log-common
         emptyDir: {} 
      containers:
      - name: sample
        image: sampleregistery.azurecr.io/root
        imagePullPolicy: IfNotPresent
        lifecycle:
          preStop:
            exec:
              command: ["/usr/local/tomcat/bin/shutdown.sh"]