Commit Graph

87 Commits

Author SHA1 Message Date
Brad Fitzpatrick
41fd4eab5c envknob: add new package for all the strconv.ParseBool(os.Getenv(..))
A new package can also later record/report which knobs are checked and
set. It also makes the code cleaner & easier to grep for env knobs.

Change-Id: Id8a123ab7539f1fadbd27e0cbeac79c2e4f09751
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
2022-01-24 11:51:23 -08:00
slowy07
ac0353e982 fix: typo spelling grammar
Signed-off-by: slowy07 <slowy.arfy@gmail.com>
2021-08-24 07:55:04 -07:00
Brad Fitzpatrick
51976ab3a2 tsweb: add vars for unix process start time and version
To be scraped in the Go expvar JSON format, as a string is involved.

For a future tool to record when processes restarted exactly, and at
what version.

Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
2021-08-23 10:36:28 -07:00
Brad Fitzpatrick
c6740da624 tsweb: make VarzHandler support untyped expvar.Maps for compatibility
Updates #2635

Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
2021-08-12 13:35:31 -07:00
Brad Fitzpatrick
7c7eb8094b tsweb: make VarzHandler support expvar.Funcs returning ints/floats
Updates #2635
2021-08-12 13:07:34 -07:00
Brad Fitzpatrick
5aba620fb9 tsweb: make VarzHandler capable of walking structs with reflect
To be used by control, per linked bug's plan.

Updates #2635

Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
2021-08-11 18:31:54 -07:00
Brad Fitzpatrick
3700cf9ea4 tsweb: also support LabelMaps from expvar.Map, without metrics
We want to use tsweb to format Prometheus-style metrics from
our temporary golang.org/x/net/http2 fork, but we don't want http2
to depend on the tailscale.com module to use the concrete type
tailscale.com/metrics.LabelMap. Instead, let a expvar.Map be used
instead of it's annotated sufficiently in its name.

Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
2021-08-10 14:31:54 -07:00
Brad Fitzpatrick
5f45d8f8e6 tsweb: add VarzHandler tests
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
2021-08-10 13:41:16 -07:00
julianknodt
3377089583 tsweb: add float64 to logged metrics
A previously added metric which was float64 was being ignored in tsweb, because it previously
only accepted int64 and ints. It can be handled in the same way as ints.

Signed-off-by: julianknodt <julianknodt@gmail.com>
2021-07-25 21:02:36 -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
David Anderson
48c25fa36f tsweb: fold StdHandlerOpts and StdHandler200s with StdHandler.
Signed-off-by: David Anderson <danderson@tailscale.com>
2021-06-15 21:55:33 -07:00
David Anderson
72343fbbec tsweb: register expvars once at startup.
Signed-off-by: David Anderson <danderson@tailscale.com>
2021-06-15 21:27:54 -07:00
Josh Bleecher Snyder
516e8a4838 tsweb: add num_goroutines expvar
Signed-off-by: Josh Bleecher Snyder <josh@tailscale.com>
2021-02-01 14:38:59 -08:00
David Anderson
692a011b54 net/interfaces: remove IsTailscaleIP, make callers use tsaddr.
Signed-off-by: David Anderson <danderson@tailscale.com>
2021-01-26 15:10:51 -08:00
Brad Fitzpatrick
017dcd520f tsweb: export VarzHandler 2021-01-14 11:49:44 -08:00
David Anderson
57cd7738c2 tsweb: add an endpoint to manually trigger a GC.
Signed-off-by: David Anderson <danderson@tailscale.com>
2020-12-08 16:49:42 -08:00
Josh Bleecher Snyder
3b46655dbb tsweb: add StatusCodeCounters to HandlerOptions
This lets servers using tsweb register expvars
that will track the number of requests ending
in 200s/300s/400s/500s.

Signed-off-by: Josh Bleecher Snyder <josh@tailscale.com>
2020-10-30 11:07:57 -07:00
Josh Bleecher Snyder
e98f2c57d6 tsweb: add StdHandlerOpts that accepts an options struct
I'm about to add yet another StdHandler option.
Time to refactor.

Signed-off-by: Josh Bleecher Snyder <josh@tailscale.com>
2020-10-30 11:07:57 -07:00
David Crawshaw
815bf017fc tsweb: when unwrapping HTTPError, record the user-facing message also in the log
There's often some useful piece of information in there not already
repeated in the internal error.

Signed-off-by: David Crawshaw <crawshaw@tailscale.com>
2020-09-17 10:12:48 -04:00
David Anderson
eccae0cd0c tsweb: add ReturnHandlerFunc.
Signed-off-by: David Anderson <danderson@tailscale.com>
2020-04-22 15:34:28 -07:00
Brad Fitzpatrick
64334143a1 tsweb: rename Handler to ReturnHandler
The name's been bugging me for a long time.

I liked neither the overlap between tsweb.Handler and http.Handler,
nor the name "ServeHTTPErr" which sounds like it's an error being
returned, like it's an error handler and not sometimes a happy path.

Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
2020-04-05 13:16:36 -07:00
David Anderson
af3a9dfad6 tsweb: add a StdHandler that doesn't log 200 responses.
Signed-off-by: David Anderson <dave@natulte.net>
2020-04-05 00:14:38 -07:00
Brad Fitzpatrick
2863e49db9 tsweb: don't flush, treat no-op Handler as 200, like Go
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
2020-04-04 16:11:53 -07:00
David Anderson
2c2dff9559 tsweb: don't panic if we get a tsweb.Error with no embedded error.
It's technically weird to return a tsweb.Error with no child err,
but it's a sensible thing to want to do, and we shouldn't panic
if it happens.

Signed-off-by: David Anderson <dave@natulte.net>
2020-04-03 10:36:21 -07:00
David Anderson
12a6626a94 tsweb: use a ResponseWriter wrapper to log more accurately.
Also adds tests, because the logging handler is acquiring a fair
number of branches.

Signed-off-by: David Anderson <dave@natulte.net>
2020-03-19 20:11:07 -07:00
Brad Fitzpatrick
6de37f4cc0 tsweb: move some comments, add a TODO 2020-03-18 09:54:48 -07:00
David Anderson
df4636567f tsweb: adjust names and docs of the "handler with errors" functions.
Signed-off-by: David Anderson <dave@natulte.net>
2020-03-18 01:39:01 -07:00
David Anderson
98eceae55e tsweb: add a Handler type.
Handler is like http.Handler, but returns errors. ErrHandler
converts back to an http.Handler, with added error handling
and logging.

Signed-off-by: David Anderson <dave@natulte.net>
2020-03-17 21:34:44 -07:00
Brad Fitzpatrick
5c1e443d34 wgengine/monitor: don't call LinkChange when interfaces look unchanged
Basically, don't trust the OS-level link monitor to only tell you
interesting things. Sanity check it.

Also, move the interfaces package into the net directory now that we
have it.
2020-03-10 11:03:19 -07:00
Brad Fitzpatrick
a9cd8f31de tsweb: don't double import expvar; appease staticcheck 2020-03-06 13:08:32 -08:00
Brad Fitzpatrick
890f5dff40 tsweb: export runtime.MemStats var in Prometheus format 2020-03-06 13:02:01 -08:00
Brad Fitzpatrick
61f3fda405 tsweb: let expvar.Ints be gauges too 2020-03-05 15:10:01 -08:00
Brad Fitzpatrick
57de94c7aa tsweb: add /debug/ access via &debugkey + TS_DEBUG_KEY_PATH 2020-03-04 13:49:30 -08:00
David Anderson
d580157921 tsweb: quote label values to comply with Prometheus format. 2020-03-04 13:46:00 -08:00
David Anderson
f192c05413 metrics: add a LabelMap type for variables with 1 label dimension.
This lets us publish sets of vars that are breakdowns along one
dimension in a format that Prometheus and Grafana natively know
how to do useful things with.

Signed-off-by: David Anderson <dave@natulte.net>
2020-03-04 13:22:50 -08:00
Brad Fitzpatrick
e371520cc5 tsweb, derp: add expvar http.Handler for Prometheus's format
And add some opinions.

Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
2020-03-03 13:59:16 -08:00
Brad Fitzpatrick
824f825552 tsweb, cmd/derper: move common web/debug stuff from derper to new tsweb
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
2020-02-25 10:06:56 -08:00