Go to 3.2.1

jupyter/base/charts/jupyterhub/Chart.yaml

@@ -1,27 +1,27 @@
 annotations:
   artifacthub.io/images: |
-    - image: quay.io/jupyterhub/configurable-http-proxy:4.6.2
+    - image: quay.io/jupyterhub/configurable-http-proxy:4.6.1
       name: configurable-http-proxy
-    - image: quay.io/jupyterhub/k8s-hub:4.0.0
+    - image: quay.io/jupyterhub/k8s-hub:3.2.1
       name: k8s-hub
-    - image: quay.io/jupyterhub/k8s-image-awaiter:4.0.0
+    - image: quay.io/jupyterhub/k8s-image-awaiter:3.2.1
       name: k8s-image-awaiter
-    - image: quay.io/jupyterhub/k8s-network-tools:4.0.0
+    - image: quay.io/jupyterhub/k8s-network-tools:3.2.1
       name: k8s-network-tools
-    - image: quay.io/jupyterhub/k8s-secret-sync:4.0.0
+    - image: quay.io/jupyterhub/k8s-secret-sync:3.2.1
       name: k8s-secret-sync
-    - image: quay.io/jupyterhub/k8s-singleuser-sample:4.0.0
+    - image: quay.io/jupyterhub/k8s-singleuser-sample:3.2.1
       name: k8s-singleuser-sample
-    - image: registry.k8s.io/kube-scheduler:v1.30.6
+    - image: registry.k8s.io/kube-scheduler:v1.26.11
       name: kube-scheduler
-    - image: registry.k8s.io/pause:3.10
+    - image: registry.k8s.io/pause:3.9
       name: pause
-    - image: registry.k8s.io/pause:3.10
+    - image: registry.k8s.io/pause:3.9
       name: pause
-    - image: traefik:v3.2.0
+    - image: traefik:v2.10.5
       name: traefik
 apiVersion: v2
-appVersion: 5.2.1
+appVersion: 4.0.2
 description: Multi-user Jupyter installation
 home: https://z2jh.jupyter.org
 icon: https://hub.jupyter.org/helm-chart/images/hublogo.svg
@@ -29,7 +29,7 @@ keywords:
 - jupyter
 - jupyterhub
 - z2jh
-kubeVersion: '>=1.28.0-0'
+kubeVersion: '>=1.23.0-0'
 maintainers:
 - email: erik@sundellopensource.se
   name: Erik Sundell
@@ -38,4 +38,4 @@ maintainers:
 name: jupyterhub
 sources:
 - https://github.com/jupyterhub/zero-to-jupyterhub-k8s
-version: 4.0.0
+version: 3.2.1

jupyter/base/charts/jupyterhub/files/hub/jupyterhub_config.py

@@ -107,35 +107,28 @@ c.JupyterHub.hub_connect_url = (
 )
 
 # implement common labels
-# This mimics the jupyterhub.commonLabels helper, but declares managed-by to
+# this duplicates the jupyterhub.commonLabels helper
-# kubespawner instead of helm.
-#
-# The labels app and release are old labels enabled to be deleted in z2jh 5, but
-# for now retained to avoid a breaking change in z2jh 4 that would force user
-# server restarts. Restarts would be required because NetworkPolicy resources
-# must select old/new pods with labels that then needs to be seen on both
-# old/new pods, and we want these resources to keep functioning for old/new user
-# server pods during an upgrade.
-#
 common_labels = c.KubeSpawner.common_labels = {}
-common_labels["app.kubernetes.io/name"] = common_labels["app"] = get_config(
+common_labels["app"] = get_config(
     "nameOverride",
     default=get_config("Chart.Name", "jupyterhub"),
 )
-release = get_config("Release.Name")
+common_labels["heritage"] = "jupyterhub"
-if release:
-    common_labels["app.kubernetes.io/instance"] = common_labels["release"] = release
 chart_name = get_config("Chart.Name")
 chart_version = get_config("Chart.Version")
 if chart_name and chart_version:
-    common_labels["helm.sh/chart"] = common_labels["chart"] = (
+    common_labels["chart"] = "{}-{}".format(
-        f"{chart_name}-{chart_version.replace('+', '_')}"
+        chart_name,
+        chart_version.replace("+", "_"),
     )
-common_labels["app.kubernetes.io/managed-by"] = "kubespawner"
+release = get_config("Release.Name")
+if release:
+    common_labels["release"] = release
 
 c.KubeSpawner.namespace = os.environ.get("POD_NAMESPACE", "default")
 
 # Max number of consecutive failures before the Hub restarts itself
+# requires jupyterhub 0.9.2
 set_config_if_not_none(
     c.Spawner,
     "consecutive_failure_limit",
@@ -256,7 +249,6 @@ if tolerations:
 storage_type = get_config("singleuser.storage.type")
 if storage_type == "dynamic":
     pvc_name_template = get_config("singleuser.storage.dynamic.pvcNameTemplate")
-    if pvc_name_template:
     c.KubeSpawner.pvc_name_template = pvc_name_template
     volume_name_template = get_config("singleuser.storage.dynamic.volumeNameTemplate")
     c.KubeSpawner.storage_pvc_ensure = True
@@ -276,14 +268,13 @@ if storage_type == "dynamic":
     c.KubeSpawner.volumes = [
         {
             "name": volume_name_template,
-            "persistentVolumeClaim": {"claimName": "{pvc_name}"},
+            "persistentVolumeClaim": {"claimName": pvc_name_template},
         }
     ]
     c.KubeSpawner.volume_mounts = [
         {
             "mountPath": get_config("singleuser.storage.homeMountPath"),
             "name": volume_name_template,
-            "subPath": get_config("singleuser.storage.dynamic.subPath"),
         }
     ]
 elif storage_type == "static":

jupyter/base/charts/jupyterhub/files/hub/z2jh.py

@@ -3,7 +3,6 @@ Utility methods for use in jupyterhub_config.py and dynamic subconfigs.
 
 Methods here can be imported by extraConfig in values.yaml
 """
-
 import os
 from collections.abc import Mapping
 from functools import lru_cache

jupyter/base/charts/jupyterhub/templates/_helpers.tpl

@@ -48,6 +48,7 @@
   - commonLabels      | uses appLabel
   - labels            | uses commonLabels
   - matchLabels       | uses labels
+  - podCullerSelector | uses matchLabels
 
 
   ## Example usage
@@ -111,62 +112,31 @@
 {{- /*
   jupyterhub.commonLabels:
     Foundation for "jupyterhub.labels".
-
+    Provides labels: app, release, (chart and heritage).
-    Provides old labels:
-      app
-      release
-      chart (omitted for matchLabels)
-      heritage (omitted for matchLabels)
-    Provides modern labels (omitted for matchLabels):
-      app.kubernetes.io/name ("app")
-      app.kubernetes.io/instance ("release")
-      helm.sh/chart ("chart")
-      app.kubernetes.io/managed-by ("heritage")
 */}}
 {{- define "jupyterhub.commonLabels" -}}
-app: {{ .appLabel | default (include "jupyterhub.appLabel" .) | quote }}
+app: {{ .appLabel | default (include "jupyterhub.appLabel" .) }}
-release: {{ .Release.Name | quote }}
+release: {{ .Release.Name }}
 {{- if not .matchLabels }}
 chart: {{ .Chart.Name }}-{{ .Chart.Version | replace "+" "_" }}
-heritage: {{ .Release.Service }}
+heritage: {{ .heritageLabel | default .Release.Service }}
-app.kubernetes.io/name: {{ .appLabel | default (include "jupyterhub.appLabel" .) | quote }}
-app.kubernetes.io/instance: {{ .Release.Name | quote }}
-helm.sh/chart: {{ .Chart.Name }}-{{ .Chart.Version | replace "+" "_" }}
-app.kubernetes.io/managed-by: {{ .Release.Service }}
 {{- end }}
 {{- end }}
 
 
 {{- /*
   jupyterhub.labels:
-    Provides old labels:
+    Provides labels: component, app, release, (chart and heritage).
-      component
-      app
-      release
-      chart (omitted for matchLabels)
-      heritage (omitted for matchLabels)
-    Provides modern labels (omitted for matchLabels):
-      app.kubernetes.io/component ("component")
-      app.kubernetes.io/name ("app")
-      app.kubernetes.io/instance release ("release")
-      helm.sh/chart ("chart")
-      app.kubernetes.io/managed-by ("heritage")
 */}}
 {{- define "jupyterhub.labels" -}}
 component: {{ include "jupyterhub.componentLabel" . }}
-{{- if not .matchLabels }}
-app.kubernetes.io/component: {{ include "jupyterhub.componentLabel" . }}
-{{- end }}
 {{ include "jupyterhub.commonLabels" . }}
 {{- end }}
 
 
 {{- /*
   jupyterhub.matchLabels:
-    Provides old labels:
+    Used to provide pod selection labels: component, app, release.
-      component
-      app
-      release
 */}}
 {{- define "jupyterhub.matchLabels" -}}
 {{- $_ := merge (dict "matchLabels" true) . -}}

jupyter/base/charts/jupyterhub/templates/hub/deployment.yaml

@@ -5,7 +5,7 @@ metadata:
   labels:
     {{- include "jupyterhub.labels" . | nindent 4 }}
 spec:
-  {{- if not (typeIs "<nil>" .Values.hub.revisionHistoryLimit) }}
+  {{- if typeIs "int" .Values.hub.revisionHistoryLimit }}
   revisionHistoryLimit: {{ .Values.hub.revisionHistoryLimit }}
   {{- end }}
   replicas: 1
@@ -97,6 +97,9 @@ spec:
         {{- . | toYaml | nindent 8 }}
       {{- end }}
       containers:
+        {{- with .Values.hub.extraContainers }}
+        {{- . | toYaml | nindent 8 }}
+        {{- end }}
         - name: hub
           image: {{ .Values.hub.image.name }}:{{ .Values.hub.image.tag }}
           {{- with .Values.hub.command }}
@@ -241,9 +244,6 @@ spec:
               path: {{ .Values.hub.baseUrl | trimSuffix "/" }}/hub/health
               port: http
           {{- end }}
-        {{- with .Values.hub.extraContainers }}
-        {{- . | toYaml | nindent 8 }}
-        {{- end }}
       {{- with .Values.hub.extraPodSpec }}
       {{- . | toYaml | nindent 6 }}
       {{- end }}

jupyter/base/charts/jupyterhub/templates/hub/secret.yaml

@@ -8,7 +8,7 @@ type: Opaque
 data:
   {{- $values := merge dict .Values }}
   {{- /* also passthrough subset of Chart / Release */}}
-  {{- $_ := set $values "Chart" (dict "Name" .Chart.Name "Version" .Chart.Version "AppVersion" .Chart.AppVersion) }}
+  {{- $_ := set $values "Chart" (dict "Name" .Chart.Name "Version" .Chart.Version) }}
   {{- $_ := set $values "Release" (pick .Release "Name" "Namespace" "Service") }}
   values.yaml: {{ $values | toYaml | b64enc | quote }}
 

jupyter/base/charts/jupyterhub/templates/hub/service.yaml

@@ -31,9 +31,6 @@ spec:
       {{- with .Values.hub.service.ports.nodePort }}
       nodePort: {{ . }}
       {{- end }}
-      {{- with .Values.hub.service.ports.appProtocol }}
-      appProtocol: {{ . }}
-      {{- end }}
 
     {{- with .Values.hub.service.extraPorts }}
     {{- . | toYaml | nindent 4 }}

jupyter/base/charts/jupyterhub/templates/image-puller/_helpers-daemonset.tpl

@@ -34,7 +34,7 @@ spec:
     type: RollingUpdate
     rollingUpdate:
       maxUnavailable: 100%
-  {{- if not (typeIs "<nil>" .Values.prePuller.revisionHistoryLimit) }}
+  {{- if typeIs "int" .Values.prePuller.revisionHistoryLimit }}
   revisionHistoryLimit: {{ .Values.prePuller.revisionHistoryLimit }}
   {{- end }}
   template:

jupyter/base/charts/jupyterhub/templates/ingress.yaml

@@ -24,9 +24,6 @@ spec:
                 name: {{ include "jupyterhub.proxy-public.fullname" $ }}
                 port:
                   name: http
-          {{- with $.Values.ingress.extraPaths }}  
-          {{- . | toYaml | nindent 10 }}  
-          {{- end }}  
       {{- if $host }}
       host: {{ $host | quote }}
       {{- end }}

jupyter/base/charts/jupyterhub/templates/proxy/autohttps/deployment.yaml

@@ -8,7 +8,7 @@ metadata:
   labels:
     {{- include "jupyterhub.labels" . | nindent 4 }}
 spec:
-  {{- if not (typeIs "<nil>" .Values.proxy.traefik.revisionHistoryLimit) }}
+  {{- if typeIs "int" .Values.proxy.traefik.revisionHistoryLimit }}
   revisionHistoryLimit: {{ .Values.proxy.traefik.revisionHistoryLimit }}
   {{- end }}
   replicas: 1
@@ -130,10 +130,10 @@ spec:
           {{- end }}
           args:
             - watch-save
-            - --label=app.kubernetes.io/name={{ include "jupyterhub.appLabel" . }}
+            - --label=app={{ include "jupyterhub.appLabel" . }}
-            - --label=app.kubernetes.io/instance={{ .Release.Name }}
+            - --label=release={{ .Release.Name }}
-            - --label=helm.sh/chart={{ .Chart.Name }}-{{ .Chart.Version | replace "+" "_" }}
+            - --label=chart={{ .Chart.Name }}-{{ .Chart.Version | replace "+" "_" }}
-            - --label=app.kubernetes.io/managed-by=secret-sync
+            - --label=heritage=secret-sync
             - {{ include "jupyterhub.proxy-public-tls.fullname" . }}
             - acme.json
             - /etc/acme/acme.json

jupyter/base/charts/jupyterhub/templates/proxy/deployment.yaml

@@ -7,7 +7,7 @@ metadata:
   labels:
     {{- include "jupyterhub.labels" . | nindent 4 }}
 spec:
-  {{- if not (typeIs "<nil>" .Values.proxy.chp.revisionHistoryLimit) }}
+  {{- if typeIs "int" .Values.proxy.chp.revisionHistoryLimit }}
   revisionHistoryLimit: {{ .Values.proxy.chp.revisionHistoryLimit }}
   {{- end }}
   replicas: 1
@@ -100,9 +100,6 @@ spec:
             {{- if .Values.debug.enabled }}
             - --log-level=debug
             {{- end }}
-            {{- if .Values.hub.config.JupyterHub.subdomain_host }}
-            - --host-routing
-            {{- end }}
             {{- range .Values.proxy.chp.extraCommandLineFlags }}
             - {{ tpl . $ }}
             {{- end }}

jupyter/base/charts/jupyterhub/templates/scheduling/user-placeholder/statefulset.yaml

@@ -16,7 +16,7 @@ metadata:
     {{- include "jupyterhub.labels" . | nindent 4 }}
 spec:
   podManagementPolicy: Parallel
-  {{- if not (typeIs "<nil>" .Values.scheduling.userPlaceholder.revisionHistoryLimit) }}
+  {{- if typeIs "int" .Values.scheduling.userPlaceholder.revisionHistoryLimit }}
   revisionHistoryLimit: {{ .Values.scheduling.userPlaceholder.revisionHistoryLimit }}
   {{- end }}
   replicas: {{ .Values.scheduling.userPlaceholder.replicas }}

jupyter/base/charts/jupyterhub/templates/scheduling/user-scheduler/configmap.yaml

@@ -10,14 +10,26 @@ data:
     This is configuration of a k8s official kube-scheduler binary running in the
     user-scheduler.
 
+    The config version and kube-scheduler binary version has a fallback for k8s
+    clusters versioned v1.23 or lower because:
+
+    - v1 / v1beta3 config requires kube-scheduler binary >=1.25 / >=1.23
+    - kube-scheduler binary >=1.25 requires storage.k8s.io/v1/CSIStorageCapacity
+      available first in k8s >=1.24
+
     ref: https://kubernetes.io/docs/reference/scheduling/config/
     ref: https://kubernetes.io/docs/reference/config-api/kube-scheduler-config.v1/
+    ref: https://kubernetes.io/docs/reference/config-api/kube-scheduler-config.v1beta3/
   */}}
   config.yaml: |
+    {{- if semverCompare ">=1.24.0-0" .Capabilities.KubeVersion.Version }}
     apiVersion: kubescheduler.config.k8s.io/v1
+    {{- else }}
+    apiVersion: kubescheduler.config.k8s.io/v1beta3
+    {{- end }}
     kind: KubeSchedulerConfiguration
     leaderElection:
-      resourceLock: leases
+      resourceLock: endpointsleases
       resourceName: {{ include "jupyterhub.user-scheduler-lock.fullname" . }}
       resourceNamespace: "{{ .Release.Namespace }}"
     profiles:

jupyter/base/charts/jupyterhub/templates/scheduling/user-scheduler/deployment.yaml

@@ -6,7 +6,7 @@ metadata:
   labels:
     {{- include "jupyterhub.labels" . | nindent 4 }}
 spec:
-  {{- if not (typeIs "<nil>" .Values.scheduling.userScheduler.revisionHistoryLimit) }}
+  {{- if typeIs "int" .Values.scheduling.userScheduler.revisionHistoryLimit }}
   revisionHistoryLimit: {{ .Values.scheduling.userScheduler.revisionHistoryLimit }}
   {{- end }}
   replicas: {{ .Values.scheduling.userScheduler.replicas }}
@@ -50,7 +50,17 @@ spec:
       {{- end }}
       containers:
         - name: kube-scheduler
+          {{- if semverCompare ">=1.24.0-0" .Capabilities.KubeVersion.Version }}
           image: {{ .Values.scheduling.userScheduler.image.name }}:{{ .Values.scheduling.userScheduler.image.tag }}
+          {{- else }}
+          # WARNING: The tag of this image is hardcoded, and the
+          #          "scheduling.userScheduler.image.tag" configuration of the
+          #          Helm chart that generated this resource manifest isn't
+          #          respected. If you install the Helm chart in a k8s cluster
+          #          versioned 1.24 or higher, your configuration will be
+          #          respected.
+          image: {{ .Values.scheduling.userScheduler.image.name }}:v1.23.14
+          {{- end }}
           {{- with .Values.scheduling.userScheduler.image.pullPolicy }}
           imagePullPolicy: {{ . }}
           {{- end }}

jupyter/base/charts/jupyterhub/templates/scheduling/user-scheduler/rbac.yaml

@@ -20,12 +20,8 @@ rules:
   #       - changed in 1.21: get/list/watch permission for namespace,
   #                          csidrivers, csistoragecapacities was added.
   #       - unchanged between 1.22 and 1.27
-  #       - changed in 1.28: permissions to get/update lock endpoint resource
-  #                          removed
-  #       - unchanged between 1.28 and 1.30
-  #       - (1.31 is known to bring some changes below)
   #
-  # ref: https://github.com/kubernetes/kubernetes/blob/v1.30.0/plugin/pkg/auth/authorizer/rbac/bootstrappolicy/testdata/cluster-roles.yaml#L721-L862
+  # ref: https://github.com/kubernetes/kubernetes/blob/v1.27.0/plugin/pkg/auth/authorizer/rbac/bootstrappolicy/testdata/cluster-roles.yaml#L736-L892
   - apiGroups:
     - ""
     - events.k8s.io
@@ -50,6 +46,21 @@ rules:
     verbs:
     - get
     - update
+  - apiGroups:
+    - ""
+    resources:
+    - endpoints
+    verbs:
+    - create
+  - apiGroups:
+    - ""
+    resourceNames:
+    - {{ include "jupyterhub.user-scheduler-lock.fullname" . }}
+    resources:
+    - endpoints
+    verbs:
+    - get
+    - update
   - apiGroups:
     - ""
     resources:
@@ -172,9 +183,9 @@ rules:
   # Copied from the system:volume-scheduler ClusterRole of the k8s version
   # matching the kube-scheduler binary we use.
   #
-  # NOTE: These rules have not changed between 1.12 and 1.29.
+  # NOTE: These rules have not changed between 1.12 and 1.27.
   #
-  # ref: https://github.com/kubernetes/kubernetes/blob/v1.29.0/plugin/pkg/auth/authorizer/rbac/bootstrappolicy/testdata/cluster-roles.yaml#L1283-L1310
+  # ref: https://github.com/kubernetes/kubernetes/blob/v1.27.0/plugin/pkg/auth/authorizer/rbac/bootstrappolicy/testdata/cluster-roles.yaml#L1311-L1338
   - apiGroups:
     - ""
     resources:

jupyter/base/charts/jupyterhub/values.yaml

@@ -41,7 +41,6 @@ hub:
     annotations: {}
     ports:
       nodePort:
-      appProtocol:
     extraPorts: []
     loadBalancerIP:
   baseUrl: /
@@ -85,21 +84,16 @@ hub:
   extraVolumeMounts: []
   image:
     name: quay.io/jupyterhub/k8s-hub
-    tag: "4.0.0"
+    tag: "3.2.1"
     pullPolicy:
     pullSecrets: []
   resources: {}
   podSecurityContext:
-    runAsNonRoot: true
     fsGroup: 1000
-    seccompProfile:
-      type: "RuntimeDefault"
   containerSecurityContext:
     runAsUser: 1000
     runAsGroup: 1000
     allowPrivilegeEscalation: false
-    capabilities:
-      drop: ["ALL"]
   lifecycle: {}
   loadRoles: {}
   services: {}
@@ -203,20 +197,15 @@ proxy:
   chp:
     revisionHistoryLimit:
     containerSecurityContext:
-      runAsNonRoot: true
       runAsUser: 65534 # nobody user
       runAsGroup: 65534 # nobody group
       allowPrivilegeEscalation: false
-      capabilities:
-        drop: ["ALL"]
-      seccompProfile:
-        type: "RuntimeDefault"
     image:
       name: quay.io/jupyterhub/configurable-http-proxy
       # tag is automatically bumped to new patch versions by the
       # watch-dependencies.yaml workflow.
       #
-      tag: "4.6.2" # https://github.com/jupyterhub/configurable-http-proxy/tags
+      tag: "4.6.1" # https://github.com/jupyterhub/configurable-http-proxy/tags
       pullPolicy:
       pullSecrets: []
     extraCommandLineFlags: []
@@ -261,20 +250,15 @@ proxy:
   traefik:
     revisionHistoryLimit:
     containerSecurityContext:
-      runAsNonRoot: true
       runAsUser: 65534 # nobody user
       runAsGroup: 65534 # nobody group
       allowPrivilegeEscalation: false
-      capabilities:
-        drop: ["ALL"]
-      seccompProfile:
-        type: "RuntimeDefault"
     image:
       name: traefik
       # tag is automatically bumped to new patch versions by the
       # watch-dependencies.yaml workflow.
       #
-      tag: "v3.2.0" # ref: https://hub.docker.com/_/traefik?tab=tags
+      tag: "v2.10.5" # ref: https://hub.docker.com/_/traefik?tab=tags
       pullPolicy:
       pullSecrets: []
     hsts:
@@ -316,17 +300,12 @@ proxy:
     extraPodSpec: {}
   secretSync:
     containerSecurityContext:
-      runAsNonRoot: true
       runAsUser: 65534 # nobody user
       runAsGroup: 65534 # nobody group
       allowPrivilegeEscalation: false
-      capabilities:
-        drop: ["ALL"]
-      seccompProfile:
-        type: "RuntimeDefault"
     image:
       name: quay.io/jupyterhub/k8s-secret-sync
-      tag: "4.0.0"
+      tag: "3.2.1"
       pullPolicy:
       pullSecrets: []
     resources: {}
@@ -366,7 +345,7 @@ singleuser:
   networkTools:
     image:
       name: quay.io/jupyterhub/k8s-network-tools
-      tag: "4.0.0"
+      tag: "3.2.1"
       pullPolicy:
       pullSecrets: []
     resources: {}
@@ -413,13 +392,12 @@ singleuser:
     homeMountPath: /home/jovyan
     dynamic:
       storageClass:
-      pvcNameTemplate:
+      pvcNameTemplate: claim-{username}{servername}
-      volumeNameTemplate: volume-{user_server}
+      volumeNameTemplate: volume-{username}{servername}
       storageAccessModes: [ReadWriteOnce]
-      subPath:
   image:
     name: quay.io/jupyterhub/k8s-singleuser-sample
-    tag: "4.0.0"
+    tag: "3.2.1"
     pullPolicy:
     pullSecrets: []
   startTimeout: 300
@@ -454,24 +432,19 @@ scheduling:
     #
     plugins:
       score:
-        # We make use of the default scoring plugins, but we re-enable some with
+        # These scoring plugins are enabled by default according to
-        # a new priority, leave some enabled with their lower default priority,
+        # https://kubernetes.io/docs/reference/scheduling/config/#scheduling-plugins
-        # and disable some.
+        # 2022-02-22.
         #
-        # Below are the default scoring plugins as of 2024-09-23 according to
+        # Enabled with high priority:
-        # https://kubernetes.io/docs/reference/scheduling/config/#scheduling-plugins.
-        #
-        # Re-enabled with high priority:
         # - NodeAffinity
         # - InterPodAffinity
         # - NodeResourcesFit
         # - ImageLocality
-        #
         # Remains enabled with low default priority:
         # - TaintToleration
         # - PodTopologySpread
         # - VolumeBinding
-        #
         # Disabled for scoring:
         # - NodeResourcesBalancedAllocation
         #
@@ -500,25 +473,20 @@ scheduling:
       - name: NodeResourcesFit
         args:
           scoringStrategy:
-            type: MostAllocated
             resources:
               - name: cpu
                 weight: 1
               - name: memory
                 weight: 1
+            type: MostAllocated
     containerSecurityContext:
-      runAsNonRoot: true
       runAsUser: 65534 # nobody user
       runAsGroup: 65534 # nobody group
       allowPrivilegeEscalation: false
-      capabilities:
-        drop: ["ALL"]
-      seccompProfile:
-        type: "RuntimeDefault"
     image:
       # IMPORTANT: Bumping the minor version of this binary should go hand in
-      #            hand with an inspection of the user-scheduelr's RBAC
+      #            hand with an inspection of the user-scheduelrs RBAC resources
-      #            resources that we have forked in
+      #            that we have forked in
       #            templates/scheduling/user-scheduler/rbac.yaml.
       #
       #            Debugging advice:
@@ -551,7 +519,7 @@ scheduling:
       # here. We aim to stay around 1 minor version behind the latest k8s
       # version.
       #
-      tag: "v1.30.6" # ref: https://github.com/kubernetes/kubernetes/tree/master/CHANGELOG
+      tag: "v1.26.11" # ref: https://github.com/kubernetes/kubernetes/tree/master/CHANGELOG
       pullPolicy:
       pullSecrets: []
     nodeSelector: {}
@@ -583,7 +551,7 @@ scheduling:
       #
       # If you update this, also update prePuller.pause.image.tag
       #
-      tag: "3.10"
+      tag: "3.9"
       pullPolicy:
       pullSecrets: []
     revisionHistoryLimit:
@@ -591,14 +559,9 @@ scheduling:
     labels: {}
     annotations: {}
     containerSecurityContext:
-      runAsNonRoot: true
       runAsUser: 65534 # nobody user
       runAsGroup: 65534 # nobody group
       allowPrivilegeEscalation: false
-      capabilities:
-        drop: ["ALL"]
-      seccompProfile:
-        type: "RuntimeDefault"
     resources: {}
   corePods:
     tolerations:
@@ -632,14 +595,9 @@ prePuller:
   annotations: {}
   resources: {}
   containerSecurityContext:
-    runAsNonRoot: true
     runAsUser: 65534 # nobody user
     runAsGroup: 65534 # nobody group
     allowPrivilegeEscalation: false
-    capabilities:
-      drop: ["ALL"]
-    seccompProfile:
-      type: "RuntimeDefault"
   extraTolerations: []
   # hook relates to the hook-image-awaiter Job and hook-image-puller DaemonSet
   hook:
@@ -648,18 +606,13 @@ prePuller:
     # image and the configuration below relates to the hook-image-awaiter Job
     image:
       name: quay.io/jupyterhub/k8s-image-awaiter
-      tag: "4.0.0"
+      tag: "3.2.1"
       pullPolicy:
       pullSecrets: []
     containerSecurityContext:
-      runAsNonRoot: true
       runAsUser: 65534 # nobody user
       runAsGroup: 65534 # nobody group
       allowPrivilegeEscalation: false
-      capabilities:
-        drop: ["ALL"]
-      seccompProfile:
-        type: "RuntimeDefault"
     podSchedulingWaitDuration: 10
     nodeSelector: {}
     tolerations: []
@@ -674,14 +627,9 @@ prePuller:
   extraImages: {}
   pause:
     containerSecurityContext:
-      runAsNonRoot: true
       runAsUser: 65534 # nobody user
       runAsGroup: 65534 # nobody group
       allowPrivilegeEscalation: false
-      capabilities:
-        drop: ["ALL"]
-      seccompProfile:
-        type: "RuntimeDefault"
     image:
       name: registry.k8s.io/pause
       # tag is automatically bumped to new patch versions by the
@@ -689,7 +637,7 @@ prePuller:
       #
       # If you update this, also update scheduling.userPlaceholder.image.tag
       #
-      tag: "3.10"
+      tag: "3.9"
       pullPolicy:
       pullSecrets: []
 
@@ -701,7 +649,6 @@ ingress:
   pathSuffix:
   pathType: Prefix
   tls: []
-  extraPaths: []
 
 # cull relates to the jupyterhub-idle-culler service, responsible for evicting
 # inactive singleuser pods.

jupyter/overlays/prod/vr/kustomization.yaml

@@ -7,7 +7,7 @@ helmCharts:
     name: jupyterhub
     releaseName: vr-jupyterhub
     valuesFile: ./values/values.yaml
-    version: 4.0.0
+    version: 3.2.1
     namespace: vr-jupyterhub
 helmGlobals:
   chartHome: ../../../base/charts/

jupyter/overlays/test/sunet/kustomization.yaml

@@ -7,7 +7,7 @@ helmCharts:
     name: jupyterhub
     releaseName: sunet-jupyterhub
     valuesFile: ./values/values.yaml
-    version: 4.0.0
+    version: 3.2.1
     namespace: sunet-jupyterhub
 helmGlobals:
   chartHome: ../../../base/charts/

jupyter/overlays/test/vr/kustomization.yaml

@@ -7,7 +7,7 @@ helmCharts:
     name: jupyterhub
     releaseName: vr-jupyterhub
     valuesFile: ./values/values.yaml
-    version: 4.0.0
+    version: 3.2.1
     namespace: vr-jupyterhub
 helmGlobals:
   chartHome: ../../../base/charts/