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Bug
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Resolution: Unresolved
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Minor
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4.14
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Quality / Stability / Reliability
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False
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Description of problem:
Following description is not proper as it's possible to use only two zones in ROSA HCP and in that scenario the count can be a multiple of 2. > the number of compute nodes to provision in total across all zones and the count must be a multiple of 3 > A Multi-AZ machine pool with three availability zones can have a machine count in multiples of 3 only, such as 3, 6, 9, and so on.
Version-Release number of selected component (if applicable):
NA
How reproducible:
Always.
Steps to Reproduce:
1. Use following subnets for ROSA HCP cluster creation:
private subnets: subnet-0684baa7c09461c17,subnet-08faa27c7f4dec755 public subnets: subnet-04b0084d28c6f1611
2. Use following command to create ROSA HCP with two zones:
$ rosa create cluster --cluster-name=*** --hosted-cp --operator-roles-prefix *** --oidc-config-id *** --subnet-ids=subnet-0684baa7c09461c17,subnet-08faa27c7f4dec755,subnet-04b0084d28c6f1611
3. Worker nodes in two zones after creation:
$ rosa list machinepool -c *** ID AUTOSCALING REPLICAS INSTANCE TYPE LABELS TAINTS AVAILABILITY ZONE SUBNET DISK SIZE VERSION AUTOREPAIR workers-0 No 1/1 m5.xlarge us-east-2a subnet-0684baa7c09461c17 300 GiB 4.15.39 Yes workers-1 No 1/1 m5.xlarge us-east-2b subnet-08faa27c7f4dec755 300 GiB 4.15.39 Yes
4. If replicas set to non 2 multiples when creating cluster following error occur:
E: Hosted clusters require that the number of compute nodes be a multiple of the number of private subnets 2, instead received: 3
Actual results:
Document says only 3 zones scenario, as ROSA HCP 2 zones is possible please modify document in a more comprehensive way.
Expected results:
For ROSA Classic:
> the number of compute nodes to provision in total across all zones and the count must be a multiple of 3 > A Multi-AZ machine pool with three availability zones can have a machine count in multiples of 3 only, such as 3, 6, 9, and so on.
For ROSA HCP:
> the number of compute nodes to provision in total across all zones and the count must be a multiple of 3 when use 3 zones, the count must be a multiple of 2 when use 2 zones. > A Multi-AZ machine pool with three availability zones can have a machine count in multiples of 3 only, such as 3, 6, 9, and so on. A Multi-AZ machine pool with two availability zones can have a machine count in multiple of 2 only.
Additional info:
If possible please clarify why 3 zones is necessary and 2 zones can be used in ROSA HCP for Multi-AZ cluster.
