🌱 CI: Increase IOPS for the devstack disks

[lentzi90]

What this PR does / why we need it:

This is an attempt to see if disk performance is what makes our CI unstable.

Which issue(s) this PR fixes (optional, in fixes #<issue number>(, fixes #<issue_number>, ...) format, will close the issue(s) when PR gets merged):
Fixes #

Special notes for your reviewer:

1. Please confirm that if this PR changes any image versions, then that's the sole change this PR makes.

TODOs:

• squashed commits
• if necessary:
  • includes documentation
  • adds unit tests

/hold

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[lentzi90]

So far so good with larger disk. The larger the disk, the better the performance.

• Devstack success 1
• Devstack failure 0

[lentzi90]

Rerunning a few times to get some statistics...
/test pull-cluster-api-provider-openstack-e2e-test

[lentzi90]

Devstack success 2
Devstack failure 0
/test pull-cluster-api-provider-openstack-e2e-test

[lentzi90]

Devstack success 2
Devstack failure 1 😞
/test pull-cluster-api-provider-openstack-e2e-test

[EmilienM]

/lgtm
feel free to approve when you feel it's ready

[EmilienM]

let's consider #2319 as well

[lentzi90]

Devstack success 3
Devstack failure 1
/test pull-cluster-api-provider-openstack-e2e-test

[lentzi90]

Devstack success 4
Devstack failure 1
/test pull-cluster-api-provider-openstack-e2e-test

[lentzi90]

Devstack success 5
Devstack failure 1
/test pull-cluster-api-provider-openstack-e2e-test

[lentzi90]

6 to 1 is better than what we seen in the periodics. I think the best there has been 4 successful in a row.
/hold cancel
/approve

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: lentzi90

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[EmilienM]

/cherry-pick release-0.11 release-0.10 release-0.9

[k8s-infra-cherrypick-robot]

@EmilienM: once the present PR merges, I will cherry-pick it on top of release-0.11 in a new PR and assign it to you.

In response to this:

/cherry-pick release-0.11 release-0.10 release-0.9

Instructions for interacting with me using PR comments are available here. If you have questions or suggestions related to my behavior, please file an issue against the kubernetes-sigs/prow repository.

[k8s-infra-cherrypick-robot]

@EmilienM: new pull request created: #2323

In response to this:

/cherry-pick release-0.11 release-0.10 release-0.9

Instructions for interacting with me using PR comments are available here. If you have questions or suggestions related to my behavior, please file an issue against the kubernetes-sigs/prow repository.