Cluster-api-provider-azure: Multi-tenancy within one manager instance

[devigned]

/kind feature

Describe the solution you'd like
Provide multi-tenancy within the same instance of a CAPZ controller, rather than one instance per credential set.

CAPA issue: https://github.com/kubernetes-sigs/cluster-api-provider-aws/issues/1552
CAPA multitenancy proposal: https://docs.google.com/document/d/1vwjvWc-RIZfwDXb-3tW4gKBOaPCKhripfhXshOmB5z4/edit#heading=h.13bi7vgop9tn

TODOs:

• [x] discuss in upcoming CAPZ meeting (5/1/2020)
• [ ] create proposal
• [ ] break down features

[CecileRobertMichon]

related to #583

[detiber]

/cc @randomvariable @nader-ziada

[randomvariable]

Hi, we're chatting about the AWS proposal today at 17:30 UTC. Ping me on slack [at]naadir if you want the invite with the Zoom ID & password.

[richardcase]

This is really interesting, especially for highly regulated environments like banks (as the CAPA proposal mentions) and to companies offering an internal platform/self service for their engineering teams to use.

Banks are an interesting one, as even sharing a management cluster may not be allowed....depending in what era the security controls still reside in.

[CecileRobertMichon]

/priority important-longterm

[CecileRobertMichon]

/reopen

this isn't actually implemented yet

[k8s-ci-robot]

@CecileRobertMichon: Reopened this issue.

In response to this:

/reopen

this isn't actually implemented yet

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[nader-ziada]

/assign

[devigned]

/assign