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Chapter 13. Scheduling resources

Taints and tolerations help you control which nodes host certain pods. Use these tools, along with node selectors, to guide the placement of network observability components.

A node selector specifies a map of key/value pairs that are defined using custom labels on nodes and selectors specified in pods.

For the pod to be eligible to run on a node, the pod must have the same key/value node selector as the label on the node.

13.1. Network observability deployment in specific nodes
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You can configure the FlowCollector to control the deployment of network observability components in specific nodes. The spec.agent.ebpf.advanced.scheduling, spec.processor.advanced.scheduling, and spec.consolePlugin.advanced.scheduling specifications have the following configurable settings:

  • NodeSelector
  • Tolerations
  • Affinity
  • PriorityClassName

Sample FlowCollector resource for spec.<component>.advanced.scheduling

apiVersion: flows.netobserv.io/v1beta2
kind: FlowCollector
metadata:
  name: cluster
spec:
# ...
advanced:
  scheduling:
    tolerations:
    - key: "<taint key>"
      operator: "Equal"
      value: "<taint value>"
      effect: "<taint effect>"
      nodeSelector:
        <key>: <value>
      affinity:
        nodeAffinity:
        requiredDuringSchedulingIgnoredDuringExecution:
          nodeSelectorTerms:
          - matchExpressions:
            - key: name
              operator: In
              values:
              - app-worker-node
      priorityClassName: """
# ...
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