[release-1.30] [cinder-csi]: allow node service to run without openstack client

[kayrus]

What this PR does / why we need it:

This PR allows to run cinder-csi-plugin node service without requiring the openstack credentials.

Which issue this PR fixes(if applicable):
fixes #2599
backport of the #2655

Special notes for reviewers:

This PR will be used to make backports to 1.29, 1.28

Release note:

This PR is intended to improve the cinder CSI driver security.

[cinder-csi]: allow node service to run without openstack client

[zetaab]

/approve

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: zetaab

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• OWNERS [zetaab]

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[zetaab]

/lgtm

[kayrus]

/cherry-pick release-1.29

[k8s-infra-cherrypick-robot]

@kayrus: once the present PR merges, I will cherry-pick it on top of release-1.29 in a new PR and assign it to you.

In response to this:

/cherry-pick release-1.29

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.

[kayrus]

/cherry-pick release-1.28

[k8s-infra-cherrypick-robot]

@kayrus: once the present PR merges, I will cherry-pick it on top of release-1.28 in a new PR and assign it to you.

In response to this:

/cherry-pick release-1.28

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]

@kayrus: #2656 failed to apply on top of branch "release-1.29":

Applying: allow node service to run without openstack client
Using index info to reconstruct a base tree...
M	cmd/cinder-csi-plugin/main.go
M	docs/cinder-csi-plugin/using-cinder-csi-plugin.md
M	pkg/csi/cinder/openstack/openstack.go
Falling back to patching base and 3-way merge...
Auto-merging pkg/csi/cinder/openstack/openstack.go
Auto-merging docs/cinder-csi-plugin/using-cinder-csi-plugin.md
CONFLICT (content): Merge conflict in docs/cinder-csi-plugin/using-cinder-csi-plugin.md
Auto-merging cmd/cinder-csi-plugin/main.go
CONFLICT (content): Merge conflict in cmd/cinder-csi-plugin/main.go
error: Failed to merge in the changes.
hint: Use 'git am --show-current-patch=diff' to see the failed patch
Patch failed at 0001 allow node service to run without openstack client
When you have resolved this problem, run "git am --continue".
If you prefer to skip this patch, run "git am --skip" instead.
To restore the original branch and stop patching, run "git am --abort".

In response to this:

/cherry-pick release-1.29

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]

@kayrus: #2656 failed to apply on top of branch "release-1.28":

Applying: allow node service to run without openstack client
Using index info to reconstruct a base tree...
M	cmd/cinder-csi-plugin/main.go
M	docs/cinder-csi-plugin/using-cinder-csi-plugin.md
M	pkg/csi/cinder/openstack/openstack.go
Falling back to patching base and 3-way merge...
Auto-merging pkg/csi/cinder/openstack/openstack.go
Auto-merging docs/cinder-csi-plugin/using-cinder-csi-plugin.md
CONFLICT (content): Merge conflict in docs/cinder-csi-plugin/using-cinder-csi-plugin.md
Auto-merging cmd/cinder-csi-plugin/main.go
CONFLICT (content): Merge conflict in cmd/cinder-csi-plugin/main.go
error: Failed to merge in the changes.
hint: Use 'git am --show-current-patch=diff' to see the failed patch
Patch failed at 0001 allow node service to run without openstack client
When you have resolved this problem, run "git am --continue".
If you prefer to skip this patch, run "git am --skip" instead.
To restore the original branch and stop patching, run "git am --abort".

In response to this:

/cherry-pick release-1.28

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.

[kayrus]

/cherry-pick release-1.29

[k8s-infra-cherrypick-robot]

@kayrus: new pull request created: #2668

In response to this:

/cherry-pick release-1.29

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.