This PR fixes a bug introduced in the kubernetes join method.
EKS is not formatting version.Minor as an integer, (e.g. `23+`). It is not possible to reliably parse this field and this blocks nodes from joining.
Co-authored-by: Noah Stride <noah.stride@goteleport.com>
Co-authored-by: Nic Klaassen <nic@goteleport.com>
This commit adds a new joinMethod as described in https://github.com/gravitational/teleport/pull/17905
This method allow pods running in the same Kubernetes cluster than the auth servers to join the Teleport cluster. It relies on Kubernetes tokens to establish trust. The goal is to be able to deploy proxies and auths separately and join them in a single cluser.
Pre Kubernetes 1.20, the tokens are static, long-lived, not bound to pods. We support them for compatibility reasons. Starting with Kubernetes 1.20, tokens are bound to pods (and starting with 1.21 they can be mounted through projected volumes). Starting with 1.21 we should only accept bound tokens. The chart will ensure tokens are properly mounted with projected volumes so we can benefit from the 1h to 10min token lifetime.
