Delete subnode's machine directories

[daehyeok]

fixes #9954

Update delete command to remove all subnode's machine directories.

[k8s-ci-robot]

Hi @daehyeok. Thanks for your PR.

I'm waiting for a kubernetes 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.

Once the patch is verified, the new status will be reflected by the ok-to-test label.

I understand the commands that are listed here.

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/test-infra repository.

[minikube-bot]

Can one of the admins verify this patch?

[tstromberg]

/ok-to-test

[minikube-pr-bot]

kvm2 Driver
error collecting results for kvm2 driver: timing run 0 with Minikube (PR 9955): timing cmd: [/home/performance-monitor/.minikube/minikube-binaries/9955/minikube start --driver=kvm2]: starting cmd: fork/exec /home/performance-monitor/.minikube/minikube-binaries/9955/minikube: exec format error
docker Driver
error collecting results for docker driver: timing run 0 with minikube: timing cmd: [/home/performance-monitor/minikube/out/minikube start --driver=docker]: waiting for minikube: exit status 50

[minikube-pr-bot]

kvm2 Driver
error collecting results for kvm2 driver: timing run 0 with minikube: timing cmd: [./minikube start --driver=kvm2]: waiting for minikube: exit status 81
docker Driver
error collecting results for docker driver: timing run 0 with minikube: timing cmd: [./minikube start --driver=docker]: waiting for minikube: exit status 80

[medyagh]

thanks for finding out this ! we were not cleaning up the machine folder for multi node

I wonder if there are other places that we are missing this

for example
in func demolish

https://github.com/medyagh/minikube/blob/75cd17801287339a00efe44fbd451b4dbfadef86/pkg/minikube/machine/delete.go#L122

is there a chance we could add this delete Machine directory to wherever it is doing for the single node ?

my undrestanding is, for single node delete the machine folder correctly but for multinode we are not.
is there any other place in the code we could do this ? (as opposed to a deffered clean up?)

[daehyeok]

Even for the single node, it looks DeleteHost not remove directory.
It's handled by deleteProfileDirectory

minikube/cmd/minikube/cmd/delete.go

Lines 330 to 331 in f680057

	// In case DeleteHost didn't complete the job.
	deleteProfileDirectory(profile.Name)

❯ minikube start -p test-profile
😄  [test-profile] minikube v1.16.0 on Darwin 10.15.7
✨  Automatically selected the docker driver
👍  Starting control plane node test-profile in cluster test-profile
🔥  Creating docker container (CPUs=2, Memory=1988MB) ...
🐳  Preparing Kubernetes v1.20.0 on Docker 20.10.0 ...
    ▪ Generating certificates and keys ...
    ▪ Booting up control plane ...
    ▪ Configuring RBAC rules ...
🔎  Verifying Kubernetes components...
🌟  Enabled addons: storage-provisioner, default-storageclass
🏄  Done! kubectl is now configured to use "test-profile" cluster and "default" namespace by default
❯ minikube delete -p test-profile
🔥  Deleting "test-profile" in docker ...
🔥  Deleting container "test-profile" ...
🔥  Removing /Users/daehyeok/.minikube/machines/test-profile ...
💀  Removed all traces of the "test-profile" cluster.

🔥 Removing /Users/daehyeok/.minikube/machines/test-profile ... this line printed by deleteProfileDirectory

minikube/cmd/minikube/cmd/delete.go

Lines 488 to 491 in f680057

	func deleteProfileDirectory(profile string) {
	machineDir := filepath.Join(localpath.MiniPath(), "machines", profile)
	if _, err := os.Stat(machineDir); err == nil {
	out.Step(style.DeletingHost, `Removing {{.directory}} ...`, out.V{"directory": machineDir})

[daehyeok]

maybe we should fix delete function ?
https://github.com/medyagh/minikube/blob/75cd17801287339a00efe44fbd451b4dbfadef86/pkg/minikube/machine/delete.go#L104

[medyagh]

that is a good idea ! @daehyeok .
admitably our delete code is the messiest and worst part of minikube code (huge huge huge chance for BIG refactor)
once we had an idea to break down the delete code in the CMD package into package.

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

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

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