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  1. OpenShift Bugs
  2. OCPBUGS-60943

[AWS][CAPI] machine get Running when set CapacityReservationsOnly on spot instance

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      * Before this update, it was possible to specify the use of the `CapacityReservationsOnly` capacity reservation behavior and Spot Instances in the same machine template.
      As a consequence, machines with these two incompatible settings were created.
      With this release, machine templates are validated to ensure these two incompatible settings do not co-occur.
      As a result, machines with these two incompatible settings cannot be created.
      (link:https://issues.redhat.com/browse/OCPBUGS-60943[OCPBUGS-60943])
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      * Before this update, it was possible to specify the use of the `CapacityReservationsOnly` capacity reservation behavior and Spot Instances in the same machine template. As a consequence, machines with these two incompatible settings were created. With this release, machine templates are validated to ensure these two incompatible settings do not co-occur. As a result, machines with these two incompatible settings cannot be created. (link: https://issues.redhat.com/browse/OCPBUGS-60943 [ OCPBUGS-60943 ])
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      Description of problem:

          machine get Running when set CapacityReservationsOnly on spot instance, but this combination should not be allowed, because I checked on AWS console it's not allowed https://drive.google.com/file/d/1Rr9royBaOGlT-J8Q2gG2r3GXc3yrBK48/view?usp=sharing we should give webhook for this case to keep consistent with AWS.

      Version-Release number of selected component (if applicable):

          4.20.0-0.nightly-2025-08-25-002949

      How reproducible:

          always

      Steps to Reproduce:

          1.Create an awsmachinetemplate set CapacityReservationsOnly on spot instance  

liuhuali@Lius-MacBook-Pro huali-test % cat ms2.yaml 
apiVersion: infrastructure.cluster.x-k8s.io/v1beta2
kind: AWSMachineTemplate
metadata:
  name: huliu-aws827b-smwxl-worker-test1
  namespace: openshift-cluster-api
spec:
  template:
    metadata: {}
    spec:
      additionalSecurityGroups:
      - filters:
        - name: tag:Name
          values:
          - huliu-aws827b-smwxl-node
      - filters:
        - name: tag:Name
          values:
          - huliu-aws827b-smwxl-lb
      additionalTags:
        kubernetes.io/cluster/huliu-aws827b-smwxl: owned
      ami:
        id: ami-0e939a03652163c23
      iamInstanceProfile: huliu-aws827b-smwxl-worker-profile
      ignition:
        storageType: UnencryptedUserData
        version: "3.4"
      instanceMetadataOptions:
        httpEndpoint: enabled
        httpPutResponseHopLimit: 1
        httpTokens: optional
        instanceMetadataTags: disabled
      instanceType: m6i.large
      rootVolume:
        encrypted: true
        size: 120
        type: gp3
      subnet:
        filters:
        - name: tag:Name
          values:
          - huliu-aws827b-smwxl-subnet-private-us-east-2a
      capacityReservationPreference: CapacityReservationsOnly
      marketType: Spot
liuhuali@Lius-MacBook-Pro huali-test % 

liuhuali@Lius-MacBook-Pro huali-test % oc create -f ms2.yaml 
awsmachinetemplate.infrastructure.cluster.x-k8s.io/huliu-aws827b-smwxl-worker-test1 created

    2.create machineset

liuhuali@Lius-MacBook-Pro huali-test % oc create -f ms3.yaml 
machineset.cluster.x-k8s.io/huliu-aws827b-smwxl-worker-test created

     3.The machine get Running but this combination should not be allowed

liuhuali@Lius-MacBook-Pro huali-test % oc get machine.c
NAME                                          CLUSTER               NODENAME                                    PROVIDERID                              PHASE     AGE     VERSION
huliu-aws827b-smwxl-worker-test-8xdrx         huliu-aws827b-smwxl   ip-10-0-14-192.us-east-2.compute.internal   aws:///us-east-2a/i-054097f28739faf10   Running   18m          

The instance on AWS
https://drive.google.com/file/d/16c6sUJc-FHZ3Wbfk3VzvhIECMrK69g0y/view?usp=sharing

      Actual results:

          The machine get Running

      Expected results:

          This combination(CapacityReservationsOnly and Spot) should not be allowed

      Additional info:

          New feature testing for https://issues.redhat.com/browse/OCPCLOUD-3028

              rh-ee-btroutma Brae Troutman
              huliu@redhat.com Huali Liu
              None
              None
              Huali Liu Huali Liu
              None
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                Created:
                Updated:
                Resolved: