I am trying to get the performance of the pod scheduling.
When kubectl describe pod performancetestpod. We will get something similar as shown below
Type Reason Age From Message
---- ------ ---- ---- -------
Normal Scheduled 21s default-scheduler Successfully assigned default/performancetestpod to ip-172-31-22-111
Normal Pulled 20s kubelet, ip-172-31-22-111 Container image "centos:7.6.1810" already present on machine
Normal Created 20s kubelet, ip-172-31-22-111 Created container
Normal Started 20s kubelet, ip-172-31-22-111 Started container
Normal Killing 10s kubelet, ip-172-31-22-111 Killing container with id docker://performancetestpod:Need to kill Pod1, Is there any way to get the age in milliseconds.
2, Is there any other way to get values in milliseconds for pod start, for eg: by using prometheus etc
From my experience there is no way to get milliseconds using kubectl in the way you do it. Answering your 2nd question - take a closer look at kube-state-metrics. As per A Deep Dive into Kubernetes Metrics article:
Object Creation Time
Often is it helpful to know at what time objects in Kubernetes where created. Kube-state-metrics exposes a creation time for almost all the objects it tracks. The metric name follows the pattern kube_<OBJECT>_created and will include values for the name of the object and the namespace where it lives. The value is an epoch timestamp to the millisecond.
For example, the CronJob creation series is called kube_cronjob_created.