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Add attach limits for C3 Baremetal and A4X + A4X-Max machine types#2138

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davis-haba:npi-attach-limits
Jul 29, 2025
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Add attach limits for C3 Baremetal and A4X + A4X-Max machine types#2138
k8s-ci-robot merged 3 commits into
kubernetes-sigs:masterfrom
davis-haba:npi-attach-limits

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@davis-haba davis-haba commented Jul 29, 2025

What type of PR is this?

Uncomment only one /kind <> line, hit enter to put that in a new line, and remove leading whitespaces from that line:

/kind api-change
/kind bug
/kind cleanup
/kind design
/kind documentation
/kind failing-test
/kind feature
/kind flake

What this PR does / why we need it:

This change specifies volume attach limits for C3 Baremetal and A4X-Max machine types.

  • A4X-Max has the same attach limits as A4X
  • C3 Baremetal has a limit of 16

Which issue(s) this PR fixes:

Fixes #

Special notes for your reviewer:

For A4x limits, see https://screenshot.googleplex.com/6MHazLYsrSvBfT9

Does this PR introduce a user-facing change?:

NONE

@k8s-ci-robot k8s-ci-robot added release-note-none Denotes a PR that doesn't merit a release note. kind/feature Categorizes issue or PR as related to a new feature. cncf-cla: yes Indicates the PR's author has signed the CNCF CLA. labels Jul 29, 2025
@k8s-ci-robot k8s-ci-robot added the needs-ok-to-test Indicates a PR that requires an org member to verify it is safe to test. label Jul 29, 2025
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k8s-ci-robot commented Jul 29, 2025

Hi @davis-haba. Thanks for your PR.

I'm waiting for a kubernetes-sigs member to verify that this patch is reasonable to test. If it is, they should reply with /ok-to-test on its own line. Until that is done, I will not automatically test new commits in this PR, but the usual testing commands by org members will still work. Regular contributors should join the org to skip this step.

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@k8s-ci-robot k8s-ci-robot added the size/M Denotes a PR that changes 30-99 lines, ignoring generated files. label Jul 29, 2025
mattcary
mattcary reviewed Jul 29, 2025
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Comment thread pkg/gce-pd-csi-driver/node_test.go
@k8s-ci-robot k8s-ci-robot added size/L Denotes a PR that changes 100-499 lines, ignoring generated files. and removed size/M Denotes a PR that changes 30-99 lines, ignoring generated files. labels Jul 29, 2025
sunnylovestiramisu
sunnylovestiramisu reviewed Jul 29, 2025
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Comment thread pkg/gce-pd-csi-driver/node.go
if strings.HasPrefix(machineType, "a4-") {
return a4HyperdiskLimit, nil
}
if strings.HasPrefix(machineType, "c3-") && strings.HasSuffix(machineType, "-metal") {
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@sunnylovestiramisu sunnylovestiramisu Jul 29, 2025

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I am not sure if we can add this here? Because c3 VMs still support PD disks, and their attach limit is 128

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@sunnylovestiramisu sunnylovestiramisu Jul 29, 2025

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"C3-metal only supports Hyperdisk block storage, specifically GCP Hyperdisk Extreme and GCP Hyperdisk Balanced with the NVMe interface."

sunnylovestiramisu
sunnylovestiramisu reviewed Jul 29, 2025
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Comment thread pkg/gce-pd-csi-driver/node_test.go
expVolumeLimit: c3MetalHyperdiskLimit,
},
{
name: "c3-highmem-192-metal",
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@sunnylovestiramisu sunnylovestiramisu Jul 29, 2025

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Are we planning to backport this? Since this is way lower than the 128(for both PD and Hyperdisk), backport request will be rejected.

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@mattcary mattcary Jul 29, 2025 •
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But metal is new, so this doesn't affect existing workloads? That is to say we should be able to backport this.

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@sunnylovestiramisu sunnylovestiramisu Jul 29, 2025

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NVM it does not support PD at all.

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sunnylovestiramisu commented Jul 29, 2025

/ok-to-test

@k8s-ci-robot k8s-ci-robot added ok-to-test Indicates a non-member PR verified by an org member that is safe to test. and removed needs-ok-to-test Indicates a PR that requires an org member to verify it is safe to test. labels Jul 29, 2025
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sunnylovestiramisu commented Jul 29, 2025

/lgtm

@k8s-ci-robot k8s-ci-robot added the lgtm "Looks good to me", indicates that a PR is ready to be merged. label Jul 29, 2025
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mattcary commented Jul 29, 2025

/lgtm
/approve

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k8s-ci-robot commented Jul 29, 2025

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: davis-haba, mattcary

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@k8s-ci-robot k8s-ci-robot added the approved Indicates a PR has been approved by an approver from all required OWNERS files. label Jul 29, 2025
@k8s-ci-robot k8s-ci-robot merged commit 77181ad into kubernetes-sigs:master Jul 29, 2025
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