Use an interface to construct Populator Pod Spec

[nahwneeth]

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: Adds an interface to provide the library user the ability to construct a pod spec tailored for their workload. In issue #170 I've tried to described how this can be used to provide trusted CA certificates to containers using cluster trust bundles irrespective of the variant of linux container used.

Which issue(s) this PR fixes:

Fixes #170

Special notes for your reviewer:

Does this PR introduce a user-facing change?:

Library users can provided their own Populator Pod Spec.
The existing PodConfig is still valid and is the default implementation.

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is NOT APPROVED

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[k8s-ci-robot]

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[k8s-ci-robot]

Hi @nahwneeth. Thanks for your PR.

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/lifecycle stale

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/lifecycle rotten

[sunnylovestiramisu]

/ok-to-test

[k8s-ci-robot]

@nahwneeth: The following tests failed, say /retest to rerun all failed tests or /retest-required to rerun all mandatory failed tests:

Test name	Commit	Details	Required	Rerun command
pull-kubernetes-csi-lib-volume-populator	7c1c7dfe5ada7965c166aa83a4fef7fdb12b4cda	link	true	/test pull-kubernetes-csi-lib-volume-populator
pull-kubernetes-csi-lib-volume-populator-1-30-on-kubernetes-1-30	7c1c7dfe5ada7965c166aa83a4fef7fdb12b4cda	link	true	/test pull-kubernetes-csi-lib-volume-populator-1-30-on-kubernetes-1-30
pull-kubernetes-csi-lib-volume-populator-1-31-on-kubernetes-1-31	7c1c7dfe5ada7965c166aa83a4fef7fdb12b4cda	link	true	/test pull-kubernetes-csi-lib-volume-populator-1-31-on-kubernetes-1-31
pull-kubernetes-csi-lib-volume-populator-unit	7c1c7dfe5ada7965c166aa83a4fef7fdb12b4cda	link	true	/test pull-kubernetes-csi-lib-volume-populator-unit

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[k8s-ci-robot]

PR needs rebase.

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[k8s-triage-robot]

The Kubernetes project currently lacks enough active contributors to adequately respond to all issues and PRs.

This bot triages PRs according to the following rules:

• After 90d of inactivity, lifecycle/stale is applied
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/close

[k8s-ci-robot]

@k8s-triage-robot: Closed this PR.

In response to this:

The Kubernetes project currently lacks enough active contributors to adequately respond to all issues and PRs.

This bot triages PRs according to the following rules:

• After 90d of inactivity, lifecycle/stale is applied
• After 30d of inactivity since lifecycle/stale was applied, lifecycle/rotten is applied
• After 30d of inactivity since lifecycle/rotten was applied, the PR is closed

You can:

• Reopen this PR with /reopen
• Mark this PR as fresh with /remove-lifecycle rotten
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Please send feedback to sig-contributor-experience at kubernetes/community.

/close

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