$ kubectl describe pod website-365-flask-ampa2-ha-member-1 -n website-365 
Name:           website-365-flask-ampa2-ha-member-1
Namespace:      website-365
Priority:       0
Node:           <none>
Labels:         (...)
Annotations:    (...)
Status:         Pending
IP:             
IPs:            <none>
Controlled By:  StatefulSet/website-365-flask-ampa2-ha-member
Init Containers:
(...)
Containers:
(...)
Conditions:
  Type           Status
  PodScheduled   False 
Volumes:
  volume:
    Type:       PersistentVolumeClaim (a reference to a PersistentVolumeClaim in the same namespace)
    ClaimName:  volume-website-365-flask-ampa2-ha-member-1
    ReadOnly:   false
(...)
Events:
  Type     Reason             Age                      From                Message
  ----     ------             ----                     ----                -------
  Normal   NotTriggerScaleUp  31m (x20835 over 7d19h)  cluster-autoscaler  pod didn't trigger scale-up: 2 node(s) had taint {pti/role: system}, that the pod didn't tolerate, 1 node(s) had volume node affinity conflict
  Normal   NotTriggerScaleUp  95s (x46144 over 7d19h)  cluster-autoscaler  pod didn't trigger scale-up: 1 node(s) had volume node affinity conflict, 2 node(s) had taint {pti/role: system}, that the pod didn't tolerate
  Warning  FailedScheduling   64s (x2401 over 43h)     default-scheduler   0/4 nodes are available: 2 node(s) had taint {pti/role: system}, that the pod didn't tolerate, 2 node(s) had volume node affinity conflict.