Deploying to Specific Nodes¶

You can run Robusta on specific nodes in your cluster. For example, on a hybrid Windows and Linux cluster, you'll want to ensure Robusta runs on Linux nodes.

You can configure this using either nodeSelectors, affinities or taints and tolerations

Running Robusta on Linux Nodes¶

Add the following to your Helm values:

runner:
  nodeSelector:
    kubernetes.io/os: linux

kubewatch:
  nodeSelector:
    kubernetes.io/os: linux

# if using Robusta's embedded kube-prometheus-stack, you can configure the Prometheus Operator's components to run on a specific node too
kube-prometheus-stack:
  alertmanager:
    alertmanagerSpec:
      nodeSelector: kubernetes.io/os: linux
  prometheus:
    prometheusSpec:
      nodeSelector: kubernetes.io/os: linux
  prometheusOperator:
    nodeSelector: kubernetes.io/os: linux
    admissionWebhooks:
      deployment:
        nodeSelector: kubernetes.io/os: linux
      patch:
        nodeSelector: kubernetes.io/os: linux
  kube-state-metrics:
    nodeSelector: kubernetes.io/os: linux
  grafana:
    nodeSelector: kubernetes.io/os: linux
  thanosRuler:
    thanosRulerSpec:
      nodeSelector: kubernetes.io/os: linux

Alternatively, you can configure this with nodeAffinities:

runner:
  affinity:
    nodeAffinity:
      requiredDuringSchedulingIgnoredDuringExecution:
        nodeSelectorTerms:
        - matchExpressions:
          - key: kubernetes.io/os
            operator: In
            values:
            - linux

kubewatch:
  affinity:
    nodeAffinity:
      requiredDuringSchedulingIgnoredDuringExecution:
        nodeSelectorTerms:
        - matchExpressions:
          - key: kubernetes.io/os
            operator: In
            values:
            - linux

# if using Robusta's embedded kube-prometheus-stack, you can configure the Prometheus Operator's components with nodeAffinities too
kube-prometheus-stack:
  alertmanager:
    alertmanagerSpec:
      affinity:
        nodeAffinity: ... # copy from above
  prometheus:
    prometheusSpec:
      affinity:
        nodeAffinity: ... # copy from above
  prometheusOperator:
    affinity:
      nodeAffinity: ... # copy from above
    admissionWebhooks:
      deployment:
        affinity:
          nodeAffinity: ... # copy from above
      patch:
        affinity:
          nodeAffinity: ... # copy from above
  kube-state-metrics:
    affinity:
      nodeAffinity: ... # copy from above
  grafana:
    affinity:
      nodeAffinity: ... # copy from above
  thanosRuler:
    thanosRulerSpec:
      affinity:
        nodeAffinity: ... # copy from above

Running Robusta on Nodes with Taints¶

To run all the Robusta components on nodes with taints you must add tolerations to each one of them. This includes the Kube Prometheus Stack components if you have enablePrometheusStack: true in your Helm values file.

Add the following to your Helm values:

globalConfig:
  popeye_job_spec:
    tolerations: ... # Your Toleration
    - key: "appname"
      operator: "Equal"
      value: "robusta"
      effect: "NoSchedule"
  krr_job_spec:
    tolerations:
    - key: "appname"
      operator: "Equal"
      value: "robusta"
      effect: "NoSchedule"

holmes:
  tolerations:  ... # copy from above

runner:
  tolerations:  ... # copy from above

kubewatch:
  tolerations:  ... # copy from above


kube-prometheus-stack:

  prometheus:
    prometheusSpec:
      tolerations:  ... # copy from above

  alertmanager:
    alertmanagerSpec:
      tolerations:  ... # copy from above

  prometheusOperator:
    tolerations:  ... # copy from above

    admissionWebhooks:
      deployment:
        tolerations:  ... # copy from above

      patch:
        tolerations:  ... # copy from above

  kube-state-metrics:
    tolerations:  ... # copy from above

  grafana:
    tolerations:  ... # copy from above

  thanosRuler:
    thanosRulerSpec:
      tolerations:  ... # copy from above

General Tips¶

To see your node labels, run kubectl get nodes --show-labels