MachineSet

A MachineSet is an abstraction over Machines.

Its main responsibilities are:

• Adopting unowned Machines that aren’t assigned to a MachineSet
• Adopting unmanaged Machines that aren’t assigned a Cluster
• Booting a group of N machines
  • Monitoring the status of those booted machines

In-place propagation

Changes to the following fields of MachineSet are propagated in-place to the Machine without needing a full rollout:

• .spec.template.metadata.labels
• .spec.template.metadata.annotations
• .spec.template.spec.nodeDrainTimeout
• .spec.template.spec.nodeDeletionTimeout
• .spec.template.spec.nodeVolumeDetachTimeout

Changes to the following fields of MachineSet are propagated in-place to the InfrastructureMachine and BootstrapConfig:

• .spec.template.metadata.labels
• .spec.template.metadata.annotations

Note: Changes to these fields will not be propagated to Machines that are marked for deletion (example: because of scale down).