Merge pull request #658 from MetaCell/feature/657

#657 chore: add support for auto pulling CloudHarness tasks onto JupyterHub nodes with the JH prepuller

Author: filippomc

applications/jupyterhub/README.md

@@ -23,3 +23,11 @@ harness:
           values: pool-highcpu   # k8s highcpu instance pool
           matchPurpose: require  # require | prefer | ignore
 ```
+
+## Customizations
+
+CloudHarness pre puller of tasks images support
+To support the pre pulling of task images see (https://github.com/MetaCell/cloud-harness/issues/657)
+the template `templates/image-puller/_helpers-daemonset.tpl` has been changed (see line 167 and on)
+
+TODO: remember to implement/revise this code after you have updated/changed the templates of JupyterHub

applications/jupyterhub/deploy/templates/image-puller/_helpers-daemonset.tpl

@@ -165,6 +165,24 @@ spec:
             {{- . | toYaml | nindent 12 }}
           {{- end }}
         {{- end }}
+
+        {{- /* --- Pull CloudHarness tasks images --- */}}
+        {{- range $k, $v := ( index .Values "task-images" )  }}
+        - name: image-pull-{{ $k | replace "-" "" }}
+          image: {{ $v }}
+          command:
+            - /bin/sh
+            - -c
+            - echo "Pulling complete"
+          {{- with $.Values.apps.jupyterhub.prePuller.resources }}
+          resources:
+            {{- . | toYaml | nindent 12 }}
+          {{- end }}
+          {{- with $.Values.apps.jupyterhub.prePuller.containerSecurityContext }}
+          securityContext:
+            {{- . | toYaml | nindent 12 }}
+          {{- end }}
+        {{- end }}
       containers:
         - name: pause
           image: {{ .Values.apps.jupyterhub.prePuller.pause.image.name }}:{{ .Values.apps.jupyterhub.prePuller.pause.image.tag }}