Brad Fitzpatrick
daafc49acd
TestUserMetricsByteCounters is currently our top flake at http://flakes/ The test waited for a direct path between its two localhost nodes by polling s1's status until CurAddr was set, then asserted that the transferred bytes appeared in the path="direct_ipv4" counters. Both steps were flaky: - CurAddr is only reported while magicsock has a confirmed, currently trusted UDP address for the peer, which depends on a heartbeat ping and CallMeMaybe cycle that can lag arbitrarily under CI load. In the CI failure logs the transfer itself went direct and the byte counter assertions passed; the only failure was the polling helper's t.Error. - On a machine where localhost has both IPv4 and IPv6, magicsock can pick ::1 (it prefers IPv6 on latency ties), so the transfer lands in the direct_ipv6 counters instead. - If no direct path is established yet, the transfer goes over DERP, whose wire-byte total (relay framing, plus TCP retransmissions inside the tunnel under load) can exceed any fixed tolerance; one flakestress run counted 33% more than the payload sent. Drop the direct-path wait and the hardcoded path label, and assert the one invariant the test actually cares about: at least the number of bytes sent must be counted across all path counters combined. There is deliberately no upper bound, since the counters legitimately include overhead, retransmissions, and the duplicate copies magicsock sends on several paths while a direct path is being confirmed. Verified with flakestress: the old test failed within 7 runs, while the fixed test passed 33,521 runs with no failures. See http://flakes/analyze-test?name=tailscale.com%2ftsnet.TestUserMetricsByteCounters Updates #deflake Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com> Change-Id: I4d8a9bfb9549ea9d8d33d3a3b55b4d03f9b9be78
Tailscale
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:
- the Android app is at https://github.com/tailscale/tailscale-android
- the Synology package is at https://github.com/tailscale/tailscale-synology
- the QNAP package is at https://github.com/tailscale/tailscale-qpkg
- the Chocolatey packaging is at https://github.com/tailscale/tailscale-chocolatey
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 1.27. (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:
- https://github.com/tailscale/tailscale/graphs/contributors
- https://github.com/tailscale/tailscale-android/graphs/contributors
Legal
WireGuard is a registered trademark of Jason A. Donenfeld.