test: Initial support for virtiofs mounts

[nirs]

This change prepares TestMountStart for adding virtiofs support in the drivers.

Add findmnt package for more precise mount validation and skip options validation for virtiofs mounts. Fix 9p mounts options names hidden by imprecise strings matching.

[k8s-ci-robot]

Skipping CI for Draft Pull Request.
If you want CI signal for your change, please convert it to an actual PR.
You can still manually trigger a test run with /test all

[nirs]

/ok-to-test

[nirs]

/cc @ComradeProgrammer

[nirs]

/cc @afbjorklund

[nirs]

/kind improvement

[nirs]

/area mount

[nirs]

/area testing

[nirs]

Rebased to consume the docker service fix

[medyagh]

plz rebase and look at the comments

[nirs]

Rebased to consume #21250, comments not addressed yet.

[nirs]

@medyagh changes in this version:

• Rebase on master (unfortunately I forgot to push the rebase before the changes so it is hard to see the diff)
• Support nested output in findmnt
• Support comparing findmnt results
• Add tests for findmnt package
• Add constants for 9p and virtiofs
• Improve error handling in the mount_start_test

Tested locally with vfkit and krunkit, should be ready for merge.

[minikube-pr-bot]

kvm2 driver with docker runtime

┌────────────────┬──────────┬────────────────────────┐
│    COMMAND     │ MINIKUBE │ MINIKUBE  ( PR 21272 ) │
├────────────────┼──────────┼────────────────────────┤
│ minikube start │ 49.3s    │ 47.7s                  │
│ enable ingress │ 15.4s    │ 15.0s                  │
└────────────────┴──────────┴────────────────────────┘

Times for minikube start: 49.3s 46.1s 49.8s 50.3s 50.8s
Times for minikube (PR 21272) start: 47.7s 50.3s 48.9s 44.9s 46.8s

Times for minikube (PR 21272) ingress: 15.0s 15.0s 15.0s 15.0s 14.9s
Times for minikube ingress: 15.4s 16.0s 15.0s 14.9s 15.4s

docker driver with docker runtime

┌────────────────┬──────────┬────────────────────────┐
│    COMMAND     │ MINIKUBE │ MINIKUBE  ( PR 21272 ) │
├────────────────┼──────────┼────────────────────────┤
│ minikube start │ 23.3s    │ 23.8s                  │
│ enable ingress │ 13.1s    │ 12.9s                  │
└────────────────┴──────────┴────────────────────────┘

Times for minikube ingress: 13.2s 12.8s 12.8s 12.8s 13.7s
Times for minikube (PR 21272) ingress: 13.8s 12.2s 12.3s 13.7s 12.7s

Times for minikube start: 23.1s 22.2s 25.3s 23.4s 22.6s
Times for minikube (PR 21272) start: 24.1s 24.8s 22.7s 24.1s 23.2s

docker driver with containerd runtime

┌────────────────┬──────────┬────────────────────────┐
│    COMMAND     │ MINIKUBE │ MINIKUBE  ( PR 21272 ) │
├────────────────┼──────────┼────────────────────────┤
│ minikube start │ 22.7s    │ 23.4s                  │
│ enable ingress │ 26.1s    │ 26.3s                  │
└────────────────┴──────────┴────────────────────────┘

Times for minikube start: 24.6s 21.6s 22.4s 22.0s 23.2s
Times for minikube (PR 21272) start: 25.1s 23.4s 24.9s 22.3s 21.5s

Times for minikube ingress: 23.2s 22.8s 22.7s 22.8s 39.3s
Times for minikube (PR 21272) ingress: 22.8s 23.7s 22.7s 22.8s 39.3s

[nirs]

/retest

[medyagh]

/lgtm

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: medyagh, nirs

The full list of commands accepted by this bot can be found here.

The pull request process is described here

Needs approval from an approver in each of these files:

• OWNERS [medyagh]

Approvers can indicate their approval by writing /approve in a comment
Approvers can cancel approval by writing /approve cancel in a comment