feat(helm): add value to customise interactive session images (reanah…

…ub#795)

Closes reanahub/reana-workflow-controller#569

helm/reana/README.md

@@ -134,5 +134,7 @@ This Helm automatically prefixes all names using the release name to avoid colli
 | `workspaces.retention_rules.cronjob_schedule`            | Cron format string describing how often pending retention rules should be applied.   | "0 2 * * *"                                     |
 | `workspaces.paths`                                       | List of additional workspace paths as strings. Each mount string is composed by a key `hostPath`(path to the directory to be mounted from the Kubernetes nodes) and a cluster_pod_mountpath (path inside the cluster containers where the `mountPath` will be mounted) e.g. `hostPath:mountPath`. The first value listed will be the default workspace root path. Any POSIX filesystem mounted on cluster nodes is supported | None |
 | `interactive_sessions.cronjob_schedule`                  | Cron format string describing how often interactive session cleanup should be performed. | "0 3 * * *"                                 |
+| `interactive_sessions.environments.jupyter.recommended`  | List of recommended environments (container images) for Jupyter notebooks. Each environment is composed of a `name` and an `image`. The first environment in the list is the default one. | `[{"image": "docker.io/jupyter/scipy-notebook:notebook-6.4.5", "name": "Jupyter SciPy Notebook 6.4.5"}]` |
+| `interactive_sessions.environments.jupyter.allow_custom` | Allow users to specify custom docker images for Jupyter notebooks.                   | false                                           |
 | `interactive_sessions.maximum_inactivity_period`         | Set a limit in days for the maximum inactivity period of interactive sessions. After this period interactive sessions will be automatically closed. To disable autoclosure and allow interactive sessions to run forever, use value "forever". | forever |
 | `components.reana_ui.launcher_examples`                  | Array of demo examples to show in the launch page in the UI. Each demo repository is composed of `name`, `url`, `image_url`; you can also optionally specify a `description` and the `specification` filename. | [] |

helm/reana/templates/reana-config.yaml

@@ -45,3 +45,6 @@ data:
       image_url: {{ .image_url | quote }}
       specification: {{ .specification | quote }}
     {{- end }}
+    interactive_sessions:
+      environments:
+        {{- .Values.interactive_sessions.environments | toYaml | nindent 8 }}

helm/reana/templates/reana-workflow-controller.yaml

@@ -162,6 +162,8 @@ spec:
           # Environment variables for job controller
           - name: REANA_JOB_CONTROLLER_ENV_VARS
             value: {{ .Values.components.reana_job_controller.environment | toJson | quote }}
+          - name: REANA_INTERACTIVE_SESSIONS_ENVIRONMENTS
+            value: {{ .Values.interactive_sessions.environments | toJson | quote }}
           {{- if .Values.reana_hostname }}
           - name: REANA_HOSTNAME
             value: {{ .Values.reana_hostname }}

helm/reana/values.yaml

@@ -22,7 +22,12 @@ workspaces:
 
 interactive_sessions:
   cronjob_schedule: "0 3 * * *"  # everyday at 3am
-  maximum_inactivity_period: forever
+  environments:
+    jupyter:
+      recommended:
+        - image: "docker.io/jupyter/scipy-notebook:notebook-6.4.5"
+          name: "Jupyter SciPy Notebook 6.4.5"
+      allow_custom: false
 
 compute_backends:
   - kubernetes