// LeaseSpec: https://github.com/kubernetes/api/blob/master/coordination/v1/types.go#L40
leasePadding = 30 seconds
Unless otherwise specified, when updating the following fields, always set:
LeaseDurationSeconds = lifecycle.metal3.io/maintenance + leasePadding
,AcquireTime = now
,RenewTime = now
,HolderIdentity = machine-remediation