Support ipv6 dual stack

[CecileRobertMichon]

/kind feature

Describe the solution you'd like
[A clear and concise description of what you want to happen.]

#646 added ipv6 single stack support.

This issue is to track adding IPv6 dual-stack support (https://kubernetes.io/docs/concepts/services-networking/dual-stack/) and enabling e2e testing for dual-stack clusters.

Anything else you would like to add:
[Miscellaneous information that will assist in solving the issue.]

for prior Azure + dual stack art, refer to https://github.com/Azure/aks-engine/pulls?q=is%3Apr+dual+stack+is%3Aclosed

Environment:

• cluster-api-provider-azure version:
• Kubernetes version: (use kubectl version):
• OS (e.g. from /etc/os-release):

[CecileRobertMichon]

cc @chewong @aramase

[aramase]

Had an offline conversation with @CecileRobertMichon

We already support dual-stack host for the VM/VMSS provisioned with CAPZ as part of single stack IPv6 support. The required changes for dual-stack will be around the Kubernetes configuration for the control plane components:

1. Multiple pod cidr
2. Option to add multiple service cidr
3. Feature flags (< 1.20) as 1.21 it's on by default

[fejta-bot]

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/lifecycle stale

[devigned]

/remove-lifecycle stale

[k8s-triage-robot]

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/lifecycle stale

[k8s-triage-robot]

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

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

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• Offer to help out with Issue Triage

Please send feedback to sig-contributor-experience at kubernetes/community.

/lifecycle rotten

[k8s-triage-robot]

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

This bot triages issues and 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 issue is closed

You can:

• Reopen this issue or PR with /reopen
• Mark this issue or PR as fresh with /remove-lifecycle rotten
• Offer to help out with Issue Triage

Please send feedback to sig-contributor-experience at kubernetes/community.

/close

[k8s-ci-robot]

@k8s-triage-robot: Closing this issue.

In response to this:

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

This bot triages issues and 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 issue is closed

You can:

• Reopen this issue or PR with /reopen
• Mark this issue or PR as fresh with /remove-lifecycle rotten
• Offer to help out with Issue Triage

Please send feedback to sig-contributor-experience at kubernetes/community.

/close

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[jsturtevant]

/reopen

[k8s-ci-robot]

@jsturtevant: Reopened this issue.

In response to this:

/reopen

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.

[jsturtevant]

/remove-lifecycle rotten

[CecileRobertMichon]

/lifecycle active

[CecileRobertMichon]

some notes on IPv6 dual stack support with Calico: projectcalico/calico#5313

[CecileRobertMichon]

/assign @aramase @Jont828