Merge pull request #3590 from jshmchenxi/add-extra-pod-spec-user-placeholder

Support extra pod spec for user placeholder pods

Author: consideRatio

jupyterhub/templates/scheduling/user-placeholder/statefulset.yaml

@@ -77,4 +77,7 @@ spec:
           securityContext:
             {{- . | toYaml | nindent 12 }}
           {{- end }}
+      {{- with .Values.scheduling.userPlaceholder.extraPodSpec }}
+      {{- . | toYaml | nindent 6 }}
+      {{- end }}
 {{- end }}

jupyterhub/values.schema.yaml

@@ -1526,6 +1526,7 @@ properties:
           2. proxy.chp.extraPodSpec
           3. proxy.traefik.extraPodSpec
           4. scheduling.userScheduler.extraPodSpec
+          5. scheduling.userPlaceholder.extraPodSpec
 
           One real-world use of these settings is to enable host networking. For
           example, to configure host networking for the hub pod, add the
@@ -2648,6 +2649,7 @@ properties:
               Unless specified here, the placeholder pods will request the same
               resources specified for the real singleuser pods.
           containerSecurityContext: *containerSecurityContext-spec
+          extraPodSpec: *extraPodSpec-spec
       corePods:
         type: object
         additionalProperties: false

jupyterhub/values.yaml

@@ -600,6 +600,7 @@ scheduling:
       seccompProfile:
         type: "RuntimeDefault"
     resources: {}
+    extraPodSpec: {}
   corePods:
     tolerations:
       - key: hub.jupyter.org/dedicated

tools/templates/lint-and-validate-values.yaml

@@ -521,6 +521,14 @@ scheduling:
     revisionHistoryLimit: 1
     replicas: 1
     resources: *resources
+    extraPodSpec:
+      topologySpreadConstraints:
+        - maxSkew: 1
+          topologyKey: zone
+          whenUnsatisfiable: DoNotSchedule
+          labelSelector:
+            matchLabels:
+              foo: bar
   corePods:
     tolerations:
       - key: mock-taint-key-corePods