(3.8.0 - 3.13.1) Update-Cluster, Update-Compute-Fleet may fail when Compute Resources use an expired Capacity Reservation

[hehe7318]

The issue

The following operations may fail:

• pcluster update-cluster
• pcluster update-compute-fleet

With the error message

Unable to parse configuration file. An error occurred when calling the DescribeCapacityReservations operation: The capacity reservation ID 'cr-xxxxx' was not found

When

1. Current cluster configuration includes a ComputeResources entry with a CapacityReservationId
2. The specified Capacity Reservation has expired
3. No InstanceType is specified within the same ComputeResources entry

For example

Scheduling:
  Scheduler: slurm
  SlurmQueues:
    - Name: string
      ComputeResources:
        - Name: string
          MinCount: integer
          MaxCount: integer
          # InstanceType is missing
          CapacityReservationTarget:
            # The Capacity Reservation below is expired or cancelled
            CapacityReservationId: cr-01234567890abcdef

Affected ParallelCluster versions, OSes and schedulers

All ParallelCluster versions from 3.8.0 to 3.13.1 with the Slurm scheduler on all OSes.

Mitigation

You can find a detailed explanation and the mitigation of the problem here.