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assigning-awx-pods-to-specific-nodes.md

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Assigning AWX pods to specific nodes

You can constrain the AWX pods created by the operator to run on a certain subset of nodes. node_selector and postgres_selector constrains the AWX pods to run only on the nodes that match all the specified key/value pairs. tolerations and postgres_tolerations allow the AWX pods to be scheduled onto nodes with matching taints. The ability to specify topologySpreadConstraints is also allowed through topology_spread_constraints If you want to use affinity rules for your AWX pod you can use the affinity option.

If you want to constrain the web and task pods individually, you can do so by specificying the deployment type before the specific setting. For example, specifying task_tolerations will allow the AWX task pod to be scheduled onto nodes with matching taints.

Name Description Default
postgres_image Path of the image to pull postgres
postgres_image_version Image version to pull 13
node_selector AWX pods' nodeSelector ''
web_node_selector AWX web pods' nodeSelector ''
task_node_selector AWX task pods' nodeSelector ''
topology_spread_constraints AWX pods' topologySpreadConstraints ''
web_topology_spread_constraints AWX web pods' topologySpreadConstraints ''
task_topology_spread_constraints AWX task pods' topologySpreadConstraints ''
affinity AWX pods' affinity rules ''
web_affinity AWX web pods' affinity rules ''
task_affinity AWX task pods' affinity rules ''
tolerations AWX pods' tolerations ''
web_tolerations AWX web pods' tolerations ''
task_tolerations AWX task pods' tolerations ''
annotations AWX pods' annotations ''
postgres_selector Postgres pods' nodeSelector ''
postgres_tolerations Postgres pods' tolerations ''

Example of customization could be:

---
spec:
  ...
  node_selector: |
    disktype: ssd
    kubernetes.io/arch: amd64
    kubernetes.io/os: linux
  topology_spread_constraints: |
    - maxSkew: 100
      topologyKey: "topology.kubernetes.io/zone"
      whenUnsatisfiable: "ScheduleAnyway"
      labelSelector:
        matchLabels:
          app.kubernetes.io/name: "<resourcename>"
  tolerations: |
    - key: "dedicated"
      operator: "Equal"
      value: "AWX"
      effect: "NoSchedule"
  task_tolerations: |
    - key: "dedicated"
      operator: "Equal"
      value: "AWX_task"
      effect: "NoSchedule"
  postgres_selector: |
    disktype: ssd
    kubernetes.io/arch: amd64
    kubernetes.io/os: linux
  postgres_tolerations: |
    - key: "dedicated"
      operator: "Equal"
      value: "AWX"
      effect: "NoSchedule"
  affinity:
    nodeAffinity:
      preferredDuringSchedulingIgnoredDuringExecution:
      - weight: 1
        preference:
          matchExpressions:
          - key: another-node-label-key
            operator: In
            values:
            - another-node-label-value
            - another-node-label-value
    podAntiAffinity:
      preferredDuringSchedulingIgnoredDuringExecution:
      - weight: 100
        podAffinityTerm:
          labelSelector:
            matchExpressions:
            - key: security
              operator: In
              values:
              - S2
          topologyKey: topology.kubernetes.io/zone