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2026-01-23all: remove AUTHORS file and references to itWill Norris1-1/+1
This file was never truly necessary and has never actually been used in the history of Tailscale's open source releases. A Brief History of AUTHORS files --- The AUTHORS file was a pattern developed at Google, originally for Chromium, then adopted by Go and a bunch of other projects. The problem was that Chromium originally had a copyright line only recognizing Google as the copyright holder. Because Google (and most open source projects) do not require copyright assignemnt for contributions, each contributor maintains their copyright. Some large corporate contributors then tried to add their own name to the copyright line in the LICENSE file or in file headers. This quickly becomes unwieldy, and puts a tremendous burden on anyone building on top of Chromium, since the license requires that they keep all copyright lines intact. The compromise was to create an AUTHORS file that would list all of the copyright holders. The LICENSE file and source file headers would then include that list by reference, listing the copyright holder as "The Chromium Authors". This also become cumbersome to simply keep the file up to date with a high rate of new contributors. Plus it's not always obvious who the copyright holder is. Sometimes it is the individual making the contribution, but many times it may be their employer. There is no way for the proejct maintainer to know. Eventually, Google changed their policy to no longer recommend trying to keep the AUTHORS file up to date proactively, and instead to only add to it when requested: https://opensource.google/docs/releasing/authors. They are also clear that: > Adding contributors to the AUTHORS file is entirely within the > project's discretion and has no implications for copyright ownership. It was primarily added to appease a small number of large contributors that insisted that they be recognized as copyright holders (which was entirely their right to do). But it's not truly necessary, and not even the most accurate way of identifying contributors and/or copyright holders. In practice, we've never added anyone to our AUTHORS file. It only lists Tailscale, so it's not really serving any purpose. It also causes confusion because Tailscalars put the "Tailscale Inc & AUTHORS" header in other open source repos which don't actually have an AUTHORS file, so it's ambiguous what that means. Instead, we just acknowledge that the contributors to Tailscale (whoever they are) are copyright holders for their individual contributions. We also have the benefit of using the DCO (developercertificate.org) which provides some additional certification of their right to make the contribution. The source file changes were purely mechanical with: git ls-files | xargs sed -i -e 's/\(Tailscale Inc &\) AUTHORS/\1 contributors/g' Updates #cleanup Change-Id: Ia101a4a3005adb9118051b3416f5a64a4a45987d Signed-off-by: Will Norris <will@tailscale.com>
2025-08-16cmd/derpprobe,prober: add run all probes handler (#16875)Mike O'Driscoll1-0/+1
Add a Run all probes handler that executes all probes except those that are continuous or the derpmap probe. This is leveraged by other tooling to confirm DERP stability after a deploy. Updates tailscale/corp#27370 Signed-off-by: Mike O'Driscoll <mikeo@tailscale.com>
2025-06-10cmd/{derp,derpprobe},prober,derp: add mesh support to derpprobe (#15414)Mike O'Driscoll1-0/+69
Add mesh key support to derpprobe for probing derpers with verify set to true. Move MeshKey checking to central point for code reuse. Fix a bad error fmt msg. Fixes tailscale/corp#27294 Fixes tailscale/corp#25756 Signed-off-by: Mike O'Driscoll <mikeo@tailscale.com>
2025-05-12cmd/derpprobe: exit with non-zero status if --once fails (#15926)Simon Law1-0/+4
`cmd/derpprobe --once` didn’t respect the convention of non-zero exit status for a failed run. It would always exit zero (i.e. success), even. This patch fixes that, but only for `--once` mode. Fixes: #15925 Signed-off-by: Simon Law <sfllaw@tailscale.com>
2025-03-18tsweb: split promvarz into an optional dependencyDavid Anderson1-0/+3
Allows the use of tsweb without pulling in all of the heavy prometheus client libraries, protobuf and so on. Updates #15160 Signed-off-by: David Anderson <dave@tailscale.com>
2025-01-10prober: support filtering regions by region ID in addition to codePercy Wegmann1-3/+3
Updates tailscale/corp#25758 Signed-off-by: Percy Wegmann <percy@tailscale.com>
2024-12-19cmd/derpprobe,prober: add ability to perform continuous queuing delay ↵Percy Wegmann1-14/+17
measurements against DERP servers This new type of probe sends DERP packets sized similarly to CallMeMaybe packets at a rate of 10 packets per second. It records the round-trip times in a Prometheus histogram. It also keeps track of how many packets are dropped. Packets that fail to arrive within 5 seconds are considered dropped. Updates tailscale/corp#24522 Signed-off-by: Percy Wegmann <percy@tailscale.com>
2024-12-13prober: perform DERP bandwidth probes over TUN device to mimic real clientPercy Wegmann1-13/+14
Updates tailscale/corp#24635 Co-authored-by: Mario Minardi <mario@tailscale.com> Signed-off-by: Percy Wegmann <percy@tailscale.com>
2024-11-15cmd/derpprobe,prober: add ability to restrict derpprobe to a single regionPercy Wegmann1-0/+4
Updates #24522 Co-authored-by: Mario Minardi <mario@tailscale.com> Signed-off-by: Percy Wegmann <percy@tailscale.com>
2024-10-15cmd/derpprobe: add /healthz endpointAndrew Dunham1-0/+5
For a customer that wants to run their own DERP prober, let's add a /healthz endpoint that can be used to monitor derpprobe itself. Updates #6526 Signed-off-by: Andrew Dunham <andrew@du.nham.ca> Change-Id: Iba315c999fc0b1a93d8c503c07cc733b4c8d5b6b
2024-08-06cmd/derpprobe: use a status page from the prober libraryAnton Tolchanov1-27/+7
Updates tailscale/corp#20583 Signed-off-by: Anton Tolchanov <anton@tailscale.com>
2024-06-06cmd/derpprobe: support 'local' derpmap to get derp map via LocalAPIBrad Fitzpatrick1-1/+1
To make it easier for people to monitor their custom DERP fleet. Updates tailscale/corp#20654 Change-Id: Id8af22936a6d893cc7b6186d298ab794a2672524 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
2024-04-02cmd/{derper,derpprobe}: add --version flagBrad Fitzpatrick1-0/+6
Fixes #11582 Change-Id: If99fc1ab6b89d624fbb07bd104dd882d2c7b50b4 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
2024-03-13prober: add a DERP bandwidth probeAnton Tolchanov1-6/+20
Updates tailscale/corp#17912 Signed-off-by: Anton Tolchanov <anton@tailscale.com>
2023-04-11prober: migrate to Prometheus metric libraryAnton Tolchanov1-3/+1
This provides an example of using native Prometheus metrics with tsweb. Prober library seems to be the only user of PrometheusVar, so I am removing support for it in tsweb. Updates https://github.com/tailscale/corp/issues/10205 Signed-off-by: Anton Tolchanov <anton@tailscale.com>
2023-03-20cmd/derpprobe: allow running all probes at the same timeAnton Tolchanov1-1/+2
This allows disabling spread mode, which is helpful if you are manually running derpprobe in `--once` mode against a small number of DERP machines. Updates https://github.com/tailscale/corp/issues/9916 Signed-off-by: Anton Tolchanov <anton@tailscale.com>
2023-01-31cmd/derpprobe: migrate to the prober frameworkAnton Tolchanov1-505/+46
`prober.DERP` was created in #5988 based on derpprobe. Having used it instead of derpprobe for a few months, I think we have enough confidence that it works and can now migrate derpprobe to use the prober framework and get rid of code duplication. A few notable changes in behaviour: - results of STUN probes over IPv4 and IPv6 are now reported separately; - TLS probing now includes OCSP verification; - probe names in the output have changed; - ability to send Slack notification from the prober has been removed. Instead, the prober now exports metrics in Expvar (/debug/vars) and Prometheus (/debug/varz) formats. Fixes https://github.com/tailscale/corp/issues/8497 Signed-off-by: Anton Tolchanov <anton@tailscale.com>
2023-01-27all: update copyright and license headersWill Norris1-3/+2
This updates all source files to use a new standard header for copyright and license declaration. Notably, copyright no longer includes a date, and we now use the standard SPDX-License-Identifier header. This commit was done almost entirely mechanically with perl, and then some minimal manual fixes. Updates #6865 Signed-off-by: Will Norris <will@tailscale.com>
2022-11-23cmd/derpprobe: add -once flag for one-off CLI diagnosticsJames Tucker1-0/+15
Updates #6478 Signed-off-by: James Tucker <james@tailscale.com>
2022-08-15net/stun: convert to use net/netip.AddrPortKris Brandow1-1/+1
Convert ParseResponse and Response to use netip.AddrPort instead of net.IP and separate port. Fixes #5281 Signed-off-by: Kris Brandow <kris.brandow@gmail.com>
2022-03-17all: use any instead of interface{}Josh Bleecher Snyder1-3/+3
My favorite part of generics. Signed-off-by: Josh Bleecher Snyder <josh@tailscale.com>
2022-03-16cmd/derpprobe: don't alert for smaller failures.Denton Gentry1-1/+80
There is a Cosmic Background level of DERP Unreachability, with individual nodes or regions becoming unreachable briefly and returning a short time later. This is due to hosting provider outages or just the Internet sloshing about. Returning a 500 error pages a human. Being awoken at 3am for a transient error is annoying. For relatively small levels of badness don't page a human, just post to Slack. If the outage impacts a significant fraction of the DERP fleet, then page a human. Signed-off-by: Denton Gentry <dgentry@tailscale.com>
2022-01-27cmd/derpprobe: check derper TLS certs tooBrad Fitzpatrick1-0/+54
Change-Id: If8c48e012b294570ebbb1a46bacdc58fafbfbcc5 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
2021-10-28derp: use new node key type.David Anderson1-1/+1
Update #3206 Signed-off-by: David Anderson <danderson@tailscale.com>
2021-10-11cmd/derpprobe: fix fmt bugBrad Fitzpatrick1-1/+1
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
2021-10-11cmd/derpprobe: also do UDP STUN probingBrad Fitzpatrick1-14/+83
Updates #3049 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
2021-07-19cmd/derpprobe: add in a delay to wait for mesh info to syncBrad Fitzpatrick1-0/+7
2021-07-14cmd/derpprobe: bound node pair probe durationBrad Fitzpatrick1-0/+10
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
2021-07-13cmd/derpprobe: move from cmd/derper/derpprobeBrad Fitzpatrick1-0/+337
Because our corp build system is confused by nested binaries. Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
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