# Initial cluster state (1 pod):

kubectl get pods -A
NAMESPACE     NAME                       READY   STATUS    RESTARTS   AGE
kube-system   coredns-5b486bf7cd-xxwgx   1/1     Running   0          27s

# Check metric before new pod creation, output shows count 2 (expected 1)::

➜  opt curl -k  https://localhost:10250/metrics | grep pod_start_duration_seconds
  % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current
                                 Dload  Upload   Total   Spent    Left  Speed
  0     0    0     0    0     0      0      0 --:--:-- --:--:-- --:--:--     0# HELP kubelet_pod_start_duration_seconds [ALPHA] Duration in seconds from kubelet seeing a pod for the first time to the pod starting to run
# TYPE kubelet_pod_start_duration_seconds histogram
kubelet_pod_start_duration_seconds_bucket{le="0.5"} 1
kubelet_pod_start_duration_seconds_bucket{le="1"} 2
kubelet_pod_start_duration_seconds_bucket{le="2"} 2
kubelet_pod_start_duration_seconds_bucket{le="3"} 2
kubelet_pod_start_duration_seconds_bucket{le="4"} 2
kubelet_pod_start_duration_seconds_bucket{le="5"} 2
kubelet_pod_start_duration_seconds_bucket{le="6"} 2
kubelet_pod_start_duration_seconds_bucket{le="8"} 2
kubelet_pod_start_duration_seconds_bucket{le="10"} 2
kubelet_pod_start_duration_seconds_bucket{le="20"} 2
kubelet_pod_start_duration_seconds_bucket{le="30"} 2
kubelet_pod_start_duration_seconds_bucket{le="45"} 2
kubelet_pod_start_duration_seconds_bucket{le="60"} 2
kubelet_pod_start_duration_seconds_bucket{le="120"} 2
kubelet_pod_start_duration_seconds_bucket{le="180"} 2
kubelet_pod_start_duration_seconds_bucket{le="240"} 2
kubelet_pod_start_duration_seconds_bucket{le="300"} 2
kubelet_pod_start_duration_seconds_bucket{le="360"} 2
kubelet_pod_start_duration_seconds_bucket{le="480"} 2
kubelet_pod_start_duration_seconds_bucket{le="600"} 2
kubelet_pod_start_duration_seconds_bucket{le="900"} 2
kubelet_pod_start_duration_seconds_bucket{le="1200"} 2
kubelet_pod_start_duration_seconds_bucket{le="1800"} 2
kubelet_pod_start_duration_seconds_bucket{le="2700"} 2
kubelet_pod_start_duration_seconds_bucket{le="3600"} 2
kubelet_pod_start_duration_seconds_bucket{le="+Inf"} 2
kubelet_pod_start_duration_seconds_sum 0.52958725
kubelet_pod_start_duration_seconds_count 2
100  178k    0  178k    0     0  9682k      0 --:--:-- --:--:-- --:--:-- 9933k

# Create new pod:
➜ kubectl apply -f testpod.yml

# Verify new cluster state (2 pods):
➜  opt kubectl get pods -A
NAMESPACE     NAME                       READY   STATUS    RESTARTS   AGE
default       testpod                    1/1     Running   0          19s
kube-system   coredns-5b486bf7cd-xxwgx   1/1     Running   0          90s

# Check metric again, output shows count 4 (expected 2):

➜  opt curl -k  https://localhost:10250/metrics | grep pod_start_duration_seconds
  % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current
                                 Dload  Upload   Total   Spent    Left  Speed
  0     0    0     0    0     0      0      0 --:--:-- --:--:-- --:--:--     0# HELP kubelet_pod_start_duration_seconds [ALPHA] Duration in seconds from kubelet seeing a pod for the first time to the pod starting to run
# TYPE kubelet_pod_start_duration_seconds histogram
kubelet_pod_start_duration_seconds_bucket{le="0.5"} 2
kubelet_pod_start_duration_seconds_bucket{le="1"} 3
kubelet_pod_start_duration_seconds_bucket{le="2"} 3
kubelet_pod_start_duration_seconds_bucket{le="3"} 3
kubelet_pod_start_duration_seconds_bucket{le="4"} 4
kubelet_pod_start_duration_seconds_bucket{le="5"} 4
kubelet_pod_start_duration_seconds_bucket{le="6"} 4
kubelet_pod_start_duration_seconds_bucket{le="8"} 4
kubelet_pod_start_duration_seconds_bucket{le="10"} 4
kubelet_pod_start_duration_seconds_bucket{le="20"} 4
kubelet_pod_start_duration_seconds_bucket{le="30"} 4
kubelet_pod_start_duration_seconds_bucket{le="45"} 4
kubelet_pod_start_duration_seconds_bucket{le="60"} 4
kubelet_pod_start_duration_seconds_bucket{le="120"} 4
kubelet_pod_start_duration_seconds_bucket{le="180"} 4
kubelet_pod_start_duration_seconds_bucket{le="240"} 4
kubelet_pod_start_duration_seconds_bucket{le="300"} 4
kubelet_pod_start_duration_seconds_bucket{le="360"} 4
kubelet_pod_start_duration_seconds_bucket{le="480"} 4
kubelet_pod_start_duration_seconds_bucket{le="600"} 4
kubelet_pod_start_duration_seconds_bucket{le="900"} 4
kubelet_pod_start_duration_seconds_bucket{le="1200"} 4
kubelet_pod_start_duration_seconds_bucket{le="1800"} 4
kubelet_pod_start_duration_seconds_bucket{le="2700"} 4
kubelet_pod_start_duration_seconds_bucket{le="3600"} 4
kubelet_pod_start_duration_seconds_bucket{le="+Inf"} 4
kubelet_pod_start_duration_seconds_sum 4.409899585
kubelet_pod_start_duration_seconds_count 4
100  184k    0  184k    0     0  10.9M      0 --:--:-- --:--:-- --:--:-- 11.2M