[🐛 Bug]: Helm Chart not working with only Hub + Relay node

[biggiethehacker]

What happened?

The Helm chart seems to break when running only Selenium Hub and Relay Nodes in non-isolated mode. Basically, the only components I have enabled are the hub and the relay but the relay node is complaining about the video recorder.

Command used to start Selenium Grid with Docker (or Kubernetes)

Values:

# Configuration for relay nodes
relayNode:
  # -- Enable relay nodes
  enabled: true

  # -- NOTE: Only used when autoscaling.enabled is false
  # Enable creation of Deployment
  # true (default) - if you want long-living pods
  # false - for provisioning your own custom type such as Jobs
  deploymentEnabled: true
  # -- Global update strategy will be overwritten by individual component
  updateStrategy:
    type: RollingUpdate
  # -- Number of relay nodes
  replicas: 1
  # -- Registry to pull the image (this overwrites global.seleniumGrid.imageRegistry parameter)
  imageRegistry:
  # -- Image of relay nodes
  imageName: node-base
  # -- Image of relay nodes (this overwrites global.seleniumGrid.nodesImageTag)
  imageTag:
  # -- Image pull policy (see https://kubernetes.io/docs/concepts/containers/images/#updating-images)
  imagePullPolicy: IfNotPresent
  # -- Image pull secret (see https://kubernetes.io/docs/tasks/configure-pod-container/pull-image-private-registry/)
  imagePullSecret: ""

  # -- Extra ports list to enable on the node container (e.g. SSH, VNC, NoVNC, etc.)
  ports: []
  # - 5900
  # - 7900
  # -- Node component port
  port: 5555
  # -- Node component expose NodePort
  nodePort:
  # -- Specify affinity for relay-node pods, this overwrites global.seleniumGrid.affinity parameter
  affinity: {}
  # -- Specify topologySpreadConstraints for relay-node pods, this overwrites global.seleniumGrid.topologySpreadConstraints parameter
  topologySpreadConstraints: []
  # -- Annotations for relay-node pods
  annotations: {}
  # -- Labels for relay-node pods
  labels: {}
  # -- Shared process namespace for relay-node pods
  shareProcessNamespace: true
  # Resources for relay-node container
  resources:
    # -- Request resources for relay-node pods
    requests:
      memory: "1Gi"
      cpu: "1"
    # -- Limit resources for relay-node pods
    limits:
      memory: "2Gi"
      cpu: "1"
  # -- SecurityContext for relay-node container
  securityContext: {}
  # -- Tolerations for relay-node pods
  tolerations: []
  # -- Node selector for relay-node pods
  nodeSelector: {}
  # -- Custom host aliases for relay nodes
  hostAliases:
  # - ip: "198.51.100.0"
  #   hostnames:
  #     - "example.com"
  #     - "example.net"
  # - ip: "203.0.113.0"
  #   hostnames:
  #     - "example.org"
  # -- Custom environment variables for relay nodes
  extraEnvironmentVariables: []
  # - name: SE_JAVA_OPTS
  #   value: "-Xmx512m"
  # - name:
  #   valueFrom:
  #     secretKeyRef:
  #       name: secret-name
  #       key: secret-key
  # -- Custom environment variables by sourcing entire configMap, Secret, etc. for relay nodes
  extraEnvFrom: []
  # - configMapRef:
  #   name: proxy-settings
  # - secretRef:
  #   name: mysecret
  # Service configuration
  service:
    # -- Create a service for node
    enabled: false
    # -- Service type
    type: ClusterIP
    # -- Set specific loadBalancerIP when serviceType is LoadBalancer (see https://kubernetes.io/docs/concepts/services-networking/service/#loadbalancer)
    loadBalancerIP: ""
    # -- Extra ports exposed in node service
    ports:
    # - name: vnc-port
    #   port: 5900
    #   targetPort: 5900
    # -- Custom annotations for service
    annotations: {}
  # -- Size limit for DSH volume mounted in container (if not set, default is disabled, e.g "1Gi")
  dshmVolumeSizeLimit: ""
  # -- Priority class name for relay-node pods
  priorityClassName: ""

  # -- Startup probe settings
  startupProbe:
    enabled: true
    path: /status
    initialDelaySeconds: 0
    periodSeconds: 5
    timeoutSeconds: 60
    failureThreshold: 12
    successThreshold: 1

  # -- Readiness probe settings
  readinessProbe:
    enabled: false
    path: /status
    initialDelaySeconds: 10
    failureThreshold: 10
    timeoutSeconds: 10
    periodSeconds: 10
    successThreshold: 1

  # -- Liveness probe settings
  livenessProbe:
    enabled: false
    path: /status
    initialDelaySeconds: 30
    failureThreshold: 6
    timeoutSeconds: 60
    periodSeconds: 10
    successThreshold: 1

  # -- Time to wait for pod termination
  terminationGracePeriodSeconds: 30
  # -- Define preStop command to shut down the relay node gracefully. This overwrites autoscaling.deregisterLifecycle
  deregisterLifecycle:
  # -- Define postStart and preStop events. This overwrites the defined preStop in deregisterLifecycle if any
  lifecycle: {}
  # -- Extra volume mounts for relay-node container
  extraVolumeMounts: []
  # - name: my-extra-volume
  #   mountPath: /home/seluser/Downloads

  # -- Extra volumes for relay-node pod
  extraVolumes: []
  # - name: my-extra-volume
  #   emptyDir: {}
  # - name: my-extra-volume-from-pvc
  #   persistentVolumeClaim:
  #     claimName: my-pv-claim

  # -- Override the number of max sessions per node
  nodeMaxSessions:
  # -- Override the scaled options for relay nodes
  scaledOptions:
  # -- Override the scaledJobOptions for relay nodes
  scaledJobOptions:
  # -- Override the scaledObjectOptions for relay nodes
  scaledObjectOptions:
  hpa:
    # -- browserName should match with Node stereotype and request capability is scaled by this scaler
    browserName: "chrome"
    # -- sessionBrowserName if the browserName is different from the sessionBrowserName
    sessionBrowserName: ""
    # -- browserVersion should match with Node stereotype and request capability is scaled by this scaler
    browserVersion: ""
    # -- platformName should match with Node stereotype and request capability is scaled by this scaler
    platformName: "Android"
    # -- Skip check SSL when connecting to the Graphql endpoint
    unsafeSsl: '{{ template "seleniumGrid.graphqlURL.unsafeSsl" . }}'  # Optional

  # -- It is used to add initContainers in the same pod of the browser node.
  # It should be set using the --set-json option
  initContainers: []

  # -- It is used to add sidecars proxy in the same pod of the browser node.
  # It means it will add a new container to the deployment itself.
  # It should be set using the --set-json option
  sidecars: []
  # -- Override specific video recording settings for edge node
  videoRecorder: {}

# Video recording configuration for all browser nodes. Can be overridden by each browser node
videoRecorder:
  # -- Enable video recording in all browser nodes
  enabled: false

### Relevant log output

```shell
Error:

helm template ./ --debug
install.go:224: 2025-01-09 14:11:15.6668769 +0530 IST m=+0.093294401 [debug] Original chart version: ""
install.go:241: 2025-01-09 14:11:15.6674273 +0530 IST m=+0.093844801 [debug] CHART PATH: C:\Users\<redacted>\Workspace\selenium-grid


Error: template: selenium-grid/templates/relay-node-deployment.yaml:36:71: executing "selenium-grid/templates/relay-node-deployment.yaml" at <.Values.videoRecorder.uploader.name>: nil pointer evaluating interface {}.videoRecorder
helm.go:86: 2025-01-09 14:11:15.9435921 +0530 IST m=+0.370009601 [debug] template: selenium-grid/templates/relay-node-deployment.yaml:36:71: executing "selenium-grid/templates/relay-node-deployment.yaml" at <.Values.videoRecorder.uploader.name>: nil pointer evaluating interface {}.videoRecorder

### Operating System

Windows 10

### Docker Selenium version (image tag)

4.27.0

### Selenium Grid chart version (chart version)

0.38.4

[github-actions]

@biggiethehacker, thank you for creating this issue. We will troubleshoot it as soon as we can.

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