terminationGracePeriodSeconds not shown in kubectl describe result - kubernetes

Question

Creating a Pod with spec terminationGracePeriodSeconds specified, I can't check whether this spec has been applied successfully using kubectl describe. How can I check whether terminationGracePeriodSeconds option has been successfully applied? I'm running kubernetes version 1.19.
apiVersion: v1
kind: Pod
metadata:
name: mysql-client
spec:
serviceAccountName: test
terminationGracePeriodSeconds: 60
containers:
- name: mysql-cli
image: blah
command: ["/bin/sh", "-c"]
args:
- sleep 2000
restartPolicy: OnFailure

Answer 1

Assuming the pod is running successfully. You should be able to see the settings in the manifest.
terminationGracePeriodSeconds is available in v1.19 as per the following page. Search for "terminationGracePeriodSeconds" here.
https://kubernetes.io/docs/reference/generated/kubernetes-api/v1.19/
Now try this command:
kubectl get pod mysql-client -o yaml | grep terminationGracePeriodSeconds -a10 -b10

Answer 2

How can I check whether terminationGracePeriodSeconds option has been successfully applied?
First of all, you need to make sure your pod has been created correctly. I will show you this on an example. I have deployed very simple pod by following yaml:
apiVersion: v1
kind: Pod
metadata:
name: nginx
spec:
terminationGracePeriodSeconds: 60
containers:
- name: nginx
image: nginx:1.14.2
ports:
- containerPort: 80
Then I run the command kubectl get pods:
NAME READY STATUS RESTARTS AGE
nginx 1/1 Running 0 9m1s
Everything is fine.
I can't check whether this spec has been applied successfully using kubectl describe.
That is also correct, because this command doesn't return us information about termination grace period. To find this information you need to run kubectl get pod <your pod name> command. The result will be similar to below:
apiVersion: v1
kind: Pod
metadata:
annotations:
kubectl.kubernetes.io/last-applied-configuration: |
{"apiVersion":"v1","kind":"Pod","metadata":{"annotations":{},"name":"nginx","namespace":"default"},"spec":{"containers":[{"image":"nginx:1.14.2","name":"nginx","ports":[{"containerPort":80}]}],"terminationGracePeriodSeconds":60}}
creationTimestamp: "2022-01-11T11:34:58Z"
name: nginx
namespace: default
resourceVersion: "57260566"
uid: <MY-UID>
spec:
containers:
- image: nginx:1.14.2
imagePullPolicy: IfNotPresent
name: nginx
ports:
- containerPort: 80
protocol: TCP
resources: {}
terminationMessagePath: /dev/termination-log
terminationMessagePolicy: File
volumeMounts:
- mountPath: /var/run/secrets/kubernetes.io/serviceaccount
name: <name>
readOnly: true
dnsPolicy: ClusterFirst
enableServiceLinks: true
nodeName: <my-node-name>
preemptionPolicy: PreemptLowerPriority
priority: 0
restartPolicy: Always
schedulerName: default-scheduler
securityContext: {}
serviceAccount: default
serviceAccountName: default
terminationGracePeriodSeconds: 60
tolerations:
- effect: NoExecute
key: node.kubernetes.io/not-ready
operator: Exists
tolerationSeconds: 300
- effect: NoExecute
key: node.kubernetes.io/unreachable
operator: Exists
tolerationSeconds: 300
volumes:
- name: kube-api-access-nj88r
projected:
defaultMode: 420
sources:
- serviceAccountToken:
expirationSeconds: 3607
path: token
- configMap:
items:
- key: ca.crt
path: ca.crt
name: kube-root-ca.crt
- downwardAPI:
items:
- fieldRef:
apiVersion: v1
fieldPath: metadata.namespace
path: namespace
status:
conditions:
- lastProbeTime: null
lastTransitionTime: "2022-01-11T11:35:01Z"
status: "True"
type: Initialized
- lastProbeTime: null
lastTransitionTime: "2022-01-11T11:35:07Z"
status: "True"
type: Ready
- lastProbeTime: null
lastTransitionTime: "2022-01-11T11:35:07Z"
status: "True"
type: ContainersReady
- lastProbeTime: null
lastTransitionTime: "2022-01-11T11:35:01Z"
status: "True"
type: PodScheduled
containerStatuses:
- containerID: containerd://<ID>
image: docker.io/library/nginx:1.14.2
imageID: docker.io/library/nginx#sha256:<sha256>
lastState: {}
name: nginx
ready: true
restartCount: 0
started: true
state:
running:
startedAt: "2022-01-11T11:35:06Z"
hostIP: <IP>
phase: Running
podIP: <IP>
podIPs:
- ip: <IP>
qosClass: BestEffort
startTime: "2022-01-11T11:35:01Z"
The most important part will be here:
{"apiVersion":"v1","kind":"Pod","metadata":{"annotations":{},"name":"nginx","namespace":"default"},"spec":{"containers":[{"image":"nginx:1.14.2","name":"nginx","ports":[{"containerPort":80}]}],"terminationGracePeriodSeconds":60}}
and here
terminationGracePeriodSeconds: 60
At this moment you are sure that terminationGracePeriodSeconds is applied successfully.