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Bug
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Resolution: Unresolved
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Undefined
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None
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4.21, 4.22.0
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None
Description of problem:
throughputMib is a new feature added in 4.21, but it doesn't work for controlplanemachineset
Version-Release number of selected component (if applicable):
4.21.0-0.nightly-arm64-2026-01-26-231543
How reproducible:
always
Steps to Reproduce:
1.Install a 4.21 AWS cluster
2.Edit controlplanemachineset, adding throughputMib
blockDevices:
- ebs:
encrypted: true
iops: 4000
kmsKey:
arn: ""
throughputMib: 1000
volumeSize: 120
volumeType: gp3
3.Check the new master doesn't contain throughputMib
liuhuali@Lius-MacBook-Pro huali-test % oc get machine
NAME PHASE TYPE REGION ZONE AGE
huliu-aws0127a-ck7b6-master-1 Running m6g.xlarge us-east-2 us-east-2b 4h2m
huliu-aws0127a-ck7b6-master-2 Running m6g.xlarge us-east-2 us-east-2c 4h2m
huliu-aws0127a-ck7b6-master-bg42v-0 Running m6g.xlarge us-east-2 us-east-2a 25m
huliu-aws0127a-ck7b6-worker-us-east-2a-9p8jl Running m6g.xlarge us-east-2 us-east-2a 3h58m
huliu-aws0127a-ck7b6-worker-us-east-2b-96k85 Running m6g.xlarge us-east-2 us-east-2b 3h58m
huliu-aws0127a-ck7b6-worker-us-east-2c-8wjbh Running m6g.xlarge us-east-2 us-east-2c 3h58m
liuhuali@Lius-MacBook-Pro huali-test % oc get machine huliu-aws0127a-ck7b6-master-bg42v-0 -oyaml
...
blockDevices:
- ebs:
encrypted: true
iops: 4000
kmsKey:
arn: ""
volumeSize: 120
volumeType: gp3
...
Check on AWS console, Throughput is 125 which is the default value.
Actual results:
throughputMib doesn't work for controlplanemachineset
Expected results:
throughputMib should work for controlplanemachineset
Additional info:
doc review for https://github.com/openshift/openshift-docs/pull/105391
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