- Remove all reliance on finalizers.
- Add `Close` method to CoreDNS `Proxy` struct.
- Wait for `Runner.Serve` to complete.
Signed-off-by: Dmitriy Matrenichev <dmitry.matrenichev@siderolabs.com>
Split from #9596 (without IPv6 stuff). This PR does this things:
- Refactored `DNSResolveCacheController`. Most of the logic moved to `dns` package types. Simplify and streamline logic.
- Replace most of the goroutine orchestration with suture package.
- Support per-item reaction to the dns listeners/servers failing to start. This allows us to ignore IPv6 errors if it's disabled.
- Support per-item reaction to the dns listeners/servers failing to stop.
Signed-off-by: Dmitriy Matrenichev <dmitry.matrenichev@siderolabs.com>
