David BondandGitHub be0e460a20 cmd/k8s-operator,k8s-operator: Kubernetes Peer Relays (#20495)
This commit contains the Kubernetes implementation of peer relays via the new `PeerRelay` CRD. It's a mega branch consisting of the commits of other PRs gone into this work:

1. https://github.com/tailscale/tailscale/pull/20211
2. https://github.com/tailscale/tailscale/pull/20329
3. https://github.com/tailscale/tailscale/pull/20423
4. https://github.com/tailscale/tailscale/pull/20503

An instance of the `PeerRelay` CRD deploys a `StatefulSet` of containerboot instances configured to advertise themselves as peer relays using the IP addresses configured via `LoadBalancer` services on each cloud provider (with some AWS specifics as it's less automatic than its competing cloud providers). 

Per replica, a `LoadBalancer` type `Service` resource is provisioned and its IP address is used to configure the respective relay.

This has been tested with success in AWS, GCP & Azure and provides additional modification to `Service` resources via the CRD for any other kinds of deployment environments. It also contains some work that may appear to be duplication of what already exists within `cmd/k8s-operator` so we can start building an appropriate migration path for `Connector`, `ProxyGroup` etc into respective `k8s-operator/reconciler/*` packages.

Closes https://github.com/tailscale/corp/issues/34524
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Tailscale

https://tailscale.com

Private WireGuard® networks made easy

Overview

This repository contains the majority of Tailscale's open source code. Notably, it includes the tailscaled daemon and the tailscale CLI tool. The tailscaled daemon runs on Linux, Windows, macOS, and to varying degrees on FreeBSD and OpenBSD. The Tailscale iOS and Android apps use this repo's code, but this repo doesn't contain the mobile GUI code.

Other Tailscale repos of note:

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go install tailscale.com/cmd/tailscale{,d}

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