multi-arch-schedule-taint.adoc

Tainting each node for a specific architecture

You can taint a node to avoid the node scheduling workloads that are incompatible with its architecture. When your cluster uses a MachineSet object, you can add parameters to the .spec.template.spec.taints field to avoid workloads being scheduled on nodes with non-supported architectures.

Before you add a taint to a node, you must scale down the MachineSet object or remove existing available machines. For more information, see Modifying a compute machine set.

Example machine set with taint set

apiVersion: machine.openshift.io/v1beta1
kind: MachineSet
metadata: # ...
spec:
  # ...
  template:
    # ...
    spec:
      # ...
      taints:
      - effect: NoSchedule
        key: multiarch.openshift.io/arch
        value: arm64

You can also set a taint on a specific node by running the following command:

$ oc adm taint nodes <node-name> multiarch.openshift.io/arch=arm64:NoSchedule