Simon Law 12188c0ade ipn/ipnlocal: log traffic steering scores and suggested exit nodes (#18681)
When traffic steering is enabled, some users are suggested an exit
node that is inappropriately far from their location. This seems to
happen right when the client connects to the control plane and the
client eventually fixes itself. But whenever an affected client
reconnects, its suggested exit node flaps, and this happens often
enough to be noticeable because connections drop whenever the exit
node is switched. This should not happen, since the map response that
contains the list of suggested exit nodes that the client picks from,
also contains the scores for those nodes.

Since our current logging and diagnostic tools don’t give us enough
insight into what is happening, this PR adds additional logging when:
- traffic steering scores are used to suggest an exit node
- an exit node is suggested, no matter how it was determined

Updates: tailscale/corp#29964
Updates: tailscale/corp#36446

Signed-off-by: Simon Law <sfllaw@tailscale.com>
2026-02-10 18:14:32 -08:00
2026-02-10 17:16:07 -08:00
2026-01-27 16:15:17 -08:00

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:

For background on which parts of Tailscale are open source and why, see https://tailscale.com/opensource/.

Using

We serve packages for a variety of distros and platforms at https://pkgs.tailscale.com.

Other clients

The macOS, iOS, and Windows clients use the code in this repository but additionally include small GUI wrappers. The GUI wrappers on non-open source platforms are themselves not open source.

Building

We always require the latest Go release, currently Go 1.25. (While we build releases with our Go fork, its use is not required.)

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

If you're packaging Tailscale for distribution, use build_dist.sh instead, to burn commit IDs and version info into the binaries:

./build_dist.sh tailscale.com/cmd/tailscale
./build_dist.sh tailscale.com/cmd/tailscaled

If your distro has conventions that preclude the use of build_dist.sh, please do the equivalent of what it does in your distro's way, so that bug reports contain useful version information.

Bugs

Please file any issues about this code or the hosted service on the issue tracker.

Contributing

PRs welcome! But please file bugs. Commit messages should reference bugs.

We require Developer Certificate of Origin Signed-off-by lines in commits.

See commit-messages.md (or skim git log) for our commit message style.

About Us

Tailscale is primarily developed by the people at https://github.com/orgs/tailscale/people. For other contributors, see:

WireGuard is a registered trademark of Jason A. Donenfeld.

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