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[node-red] Add startupProbe (#147)
* Add startupProbe to Node-RED chart in order to address slow starting container being killed due to liveness probe failures. * Bump node-red chart version * Update version to reflect new feature. * Paramaterisation of liveness, readiness and startup probe configuration. Configure startup probe to disabled by default. Co-authored-by: Jeff Billimek <jeff@billimek.com>
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@ -2,7 +2,7 @@ apiVersion: v2
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appVersion: 1.0.6-12
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description: Node-RED is low-code programming for event-driven applications
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name: node-red
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version: 3.1.0
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version: 3.2.0
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keywords:
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- nodered
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- node-red
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@ -36,46 +36,58 @@ The command removes all the Kubernetes components associated with the chart and
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The following tables lists the configurable parameters of the Node-RED chart and their default values.
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| Parameter | Description | Default |
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|:---------------------------------- |:----------------------------------------------------------------------- |:------------------------- |
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| `image.repository` | node-red image | `nodered/node-red` |
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| `image.tag` | node-red image tag | `1.0.6-12-minimal` |
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| `image.pullPolicy` | node-red image pull policy | `IfNotPresent` |
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| `strategyType` | Specifies the strategy used to replace old Pods by new ones | `Recreate` |
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| `serviceAccountName` | Service account to run the pod as | `` |
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| `livenessProbePath` | Default livenessProbe path | `/` |
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| `readinessProbePath` | Default readinessProbe path | `/` |
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| `flows` | Default flows configuration | `flows.json` |
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| `safeMode` | Setting to true starts Node-RED in safe (not running) mode | `false` |
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| `enableProjects` | setting to true starts Node-RED with the projects feature enabled | `false` |
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| `nodeOptions` | Node.js runtime arguments | `` |
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| `extraEnvs` | Extra environment variables which will be appended to the env | `[]` |
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| `timezone` | Default timezone | `UTC` |
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| `service.type` | Kubernetes service type for the GUI | `ClusterIP` |
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| `service.port` | Kubernetes port where the GUI is exposed | `1880` |
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| `service.nodePort` | Kubernetes nodePort where the GUI is exposed | `` |
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| `service.annotations` | Service annotations for the GUI | `{}` |
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| `service.labels` | Custom labels | `{}` |
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| `service.loadBalancerIP` | Loadbalance IP for the GUI | `{}` |
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| `service.loadBalancerSourceRanges` | List of IP CIDRs allowed access to load balancer (if supported) | None |
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| `service.externalTrafficPolicy` | Set the externalTrafficPolicy in the Service to either Cluster or Local | `Cluster` |
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| `ingress.enabled` | Enables Ingress | `false` |
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| `ingress.annotations` | Ingress annotations | `{}` |
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| `ingress.path` | Ingress path | `/` |
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| `ingress.hosts` | Ingress accepted hostnames | `chart-example.local` |
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| `ingress.tls` | Ingress TLS configuration | `[]` |
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| `persistence.enabled` | Use persistent volume to store data | `false` |
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| `persistence.size` | Size of persistent volume claim | `5Gi` |
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| `persistence.existingClaim` | Use an existing PVC to persist data | `nil` |
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| `persistence.storageClass` | Type of persistent volume claim | `-` |
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| `persistence.accessModes` | Persistence access modes | `ReadWriteOnce` |
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| `persistence.subPath` | Mount a sub dir of the persistent volume | `nil` |
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| `resources` | CPU/Memory resource requests/limits | `{}` |
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| `nodeSelector` | Node labels for pod assignment | `{}` |
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| `tolerations` | Toleration labels for pod assignment | `[]` |
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| `affinity` | Affinity settings for pod assignment | `{}` |
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| `podAnnotations` | Key-value pairs to add as pod annotations | `{}` |
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| `deploymentAnnotations` | Key-value pairs to add as deployment annotations | `{}` |
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| Parameter | Description | Default |
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|:------------------------------------- |:----------------------------------------------------------------------- |:------------------------- |
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| `image.repository` | node-red image | `nodered/node-red` |
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| `image.tag` | node-red image tag | `1.0.6-12-minimal` |
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| `image.pullPolicy` | node-red image pull policy | `IfNotPresent` |
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| `strategyType` | Specifies the strategy used to replace old Pods by new ones | `Recreate` |
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| `serviceAccountName` | Service account to run the pod as | `` |
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| `probes.liveness.enabled` | Enable/ disable livenessProbe | `true` |
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| `probes.liveness.probePath` | Set livenessProbe path | `/` |
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| `probes.liveness.initialDelaySeconds` | Set livenessProbe initial delay | 60 |
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| `probes.liveness.failureThreshold` | Set livenessProbe failure threshold | 5 |
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| `probes.liveness.timeoutSeconds` | Set livenessProbe timeout | 10 |
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| `probes.readiness.enabled` | Enable/ disable readinessProbe | `true` |
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| `probes.readiness.probePath` | Set readinessProbe path | `/` |
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| `probes.readiness.initialDelaySeconds`| Set readinessProbe initial delay | 60 |
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| `probes.readiness.failureThreshold` | Set readinessProbe failure threshold | 5 |
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| `probes.readiness.timeoutSeconds` | Set readinessProbe timeout | 10 |
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| `probes.startup.enabled` | Enable/ disable readinessProbe | `false` |
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| `probes.startup.probePath` | Set startupProbe path | `/` |
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| `probes.startup.failureThreshold` | Set startupProbe failure threshold | 30 |
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| `probes.startup.periodSeconds` | Set startupProbe period | 10 |
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| `flows` | Default flows configuration | `flows.json` |
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| `safeMode` | Setting to true starts Node-RED in safe (not running) mode | `false` |
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| `enableProjects` | setting to true starts Node-RED with the projects feature enabled | `false` |
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| `nodeOptions` | Node.js runtime arguments | `` |
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| `extraEnvs` | Extra environment variables which will be appended to the env | `[]` |
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| `timezone` | Default timezone | `UTC` |
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| `service.type` | Kubernetes service type for the GUI | `ClusterIP` |
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| `service.port` | Kubernetes port where the GUI is exposed | `1880` |
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| `service.nodePort` | Kubernetes nodePort where the GUI is exposed | `` |
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| `service.annotations` | Service annotations for the GUI | `{}` |
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| `service.labels` | Custom labels | `{}` |
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| `service.loadBalancerIP` | Loadbalance IP for the GUI | `{}` |
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| `service.loadBalancerSourceRanges` | List of IP CIDRs allowed access to load balancer (if supported) | None |
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| `service.externalTrafficPolicy` | Set the externalTrafficPolicy in the Service to either Cluster or Local | `Cluster` |
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| `ingress.enabled` | Enables Ingress | `false` |
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| `ingress.annotations` | Ingress annotations | `{}` |
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| `ingress.path` | Ingress path | `/` |
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| `ingress.hosts` | Ingress accepted hostnames | `chart-example.local` |
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| `ingress.tls` | Ingress TLS configuration | `[]` |
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| `persistence.enabled` | Use persistent volume to store data | `false` |
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| `persistence.size` | Size of persistent volume claim | `5Gi` |
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| `persistence.existingClaim` | Use an existing PVC to persist data | `nil` |
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| `persistence.storageClass` | Type of persistent volume claim | `-` |
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| `persistence.accessModes` | Persistence access modes | `ReadWriteOnce` |
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| `persistence.subPath` | Mount a sub dir of the persistent volume | `nil` |
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| `resources` | CPU/Memory resource requests/limits | `{}` |
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| `nodeSelector` | Node labels for pod assignment | `{}` |
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| `tolerations` | Toleration labels for pod assignment | `[]` |
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| `affinity` | Affinity settings for pod assignment | `{}` |
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| `podAnnotations` | Key-value pairs to add as pod annotations | `{}` |
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| `deploymentAnnotations` | Key-value pairs to add as deployment annotations | `{}` |
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Specify each parameter using the `--set key=value[,key=value]` argument to `helm install`. For example,
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@ -44,14 +44,32 @@ spec:
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- name: http
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containerPort: 1880
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protocol: TCP
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{{- if .Values.probes.liveness.enabled }}
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livenessProbe:
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httpGet:
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path: {{ .Values.livenessProbePath }}
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path: {{ .Values.probes.liveness.probePath }}
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port: http
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initialDelaySeconds: {{ .Values.probes.liveness.initialDelaySeconds }}
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failureThreshold: {{ .Values.probes.liveness.failureThreshold }}
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timeoutSeconds: {{ .Values.probes.liveness.timeoutSeconds }}
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{{- end }}
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{{- if .Values.probes.readiness.enabled }}
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readinessProbe:
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httpGet:
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path: {{ .Values.readinessProbePath }}
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path: {{ .Values.probes.readiness.probePath }}
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port: http
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initialDelaySeconds: {{ .Values.probes.readiness.initialDelaySeconds }}
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failureThreshold: {{ .Values.probes.readiness.failureThreshold }}
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timeoutSeconds: {{ .Values.probes.readiness.timeoutSeconds }}
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{{- end }}
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{{- if .Values.probes.startup.enabled }}
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startupProbe:
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httpGet:
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path: {{ .Values.probes.startup.probePath }}
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port: http
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failureThreshold: {{ .Values.probes.startup.failureThreshold }}
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periodSeconds: {{ .Values.probes.startup.periodSeconds }}
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{{- end }}
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env:
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- name: FLOWS
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value: "{{ .Values.flows }}"
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@ -15,8 +15,31 @@ fullnameOverride: ""
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serviceAccountName: ""
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livenessProbePath: /
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readinessProbePath: /
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# Probes configuration
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# ref: https://kubernetes.io/docs/concepts/workloads/pods/pod-lifecycle/#container-probes
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probes:
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liveness:
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# Indicates whether the container is running. If the liveness probe fails, the kubelet kills the container
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# and the container is subjected to its restart policy.
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enabled: true
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probePath: /
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initialDelaySeconds: 60
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failureThreshold: 5
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timeoutSeconds: 10
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readiness:
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# Indicates whether the container is ready to respond to requests.
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enabled: true
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probePath: /
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initialDelaySeconds: 60
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failureThreshold: 5
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timeoutSeconds: 10
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startup:
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# Indicates whether the application within the container is started.
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# All other probes are disabled if a startup probe is provided, until it succeeds.
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enabled: false
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probePath: /
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failureThreshold: 30
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periodSeconds: 10
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flows: "flows.json"
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safeMode: "false"
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