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7 Commits

Author SHA1 Message Date
Anton Tolchanov 8546ff98fb tsweb: move varz handler(s) into separate modules 
This splits Prometheus metric handlers exposed by tsweb into two
modules:
- `varz.Handler` exposes Prometheus metrics generated by our expvar
  converter;
- `promvarz.Handler` combines our expvar-converted metrics and native
  Prometheus metrics.

By default, tsweb will use the promvarz handler, however users can keep
using only the expvar converter. Specifically, `tailscaled` now uses
`varz.Handler` explicitly, which avoids a dependency on the
(heavyweight) Prometheus client.

Updates https://github.com/tailscale/corp/issues/10205

Signed-off-by: Anton Tolchanov <anton@tailscale.com>
 2023-04-11 08:37:32 +01:00
Anton Tolchanov 11e6247d2a tsweb: expose native Prometheus metrics in /debug/varz 
The handler will expose built-in process and Go metrics by default,
which currently duplicate some of the expvar-proxied metrics
(`goroutines` vs `go_goroutines`, `memstats` vs `go_memstats`), but as
long as their names are different, Prometheus server will just scrape
both.

This will change /debug/varz behaviour for most tsweb binaries, but
notably not for control, which configures a `tsweb.VarzHandler`
[explicitly](https://github.com/tailscale/corp/blob/a5b5d5167f1a2b780d313ec6a30e7b96dfa25b2d/cmd/tailcontrol/tailcontrol.go#L779)

Updates https://github.com/tailscale/corp/issues/10205

Signed-off-by: Anton Tolchanov <anton@tailscale.com>
 2023-04-11 08:37:32 +01:00
David Anderson 8b2ae47c31 version: unexport all vars, turn Short/Long into funcs 
The other formerly exported values aren't used outside the package,
so just unexport them.

Signed-off-by: David Anderson <danderson@tailscale.com>
 2023-02-11 07:29:55 +00:00
Will Norris 71029cea2d all: update copyright and license headers 
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>
 2023-01-27 15:36:29 -08:00
Josh Bleecher Snyder 0868329936 all: use any instead of interface{} 
My favorite part of generics.

Signed-off-by: Josh Bleecher Snyder <josh@tailscale.com>
 2022-03-17 11:35:09 -07:00
Brad Fitzpatrick 722942dd46 tsweb: restore CPU profiling handler 
It was accidentally deleted in the earlier 0022c3d2e (#2143) refactor.
Lock it in with a test.

Fixes tailscale/corp#2503

Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
 2021-09-02 09:24:29 -07:00
David Anderson 0022c3d2e2 tsweb: replace NewMux with a more flexible DebugHandler. 
Signed-off-by: David Anderson <danderson@tailscale.com>
 2021-06-16 19:00:47 -07:00