How to get the time taken for Pod to boot up using Promethus

Question

I need to get the time taken by a pod to boot up from Pod Scheduled to Pod running status using Prometheus metrics.

I understand these information are avaiable in kubectl pod commands, but need to get as part of promql query.

Answer 1

You can take a look at the pod metrics from kube-state-metrics. There is a ton of valuable information there.

For this specific case, I think that kube_pod_container_state_started and kube_pod_status_scheduled_time could be of interest to you:

From the kube-state-metrics docs:

• kube_pod_status_scheduled_time: Unix timestamp when pod moved into scheduled status
• kube_pod_container_state_started: Start time in unix timestamp for a pod container.

The difference between these metrics should provide the amount of time that a pod was scheduled but not yet running.