148 Commits (main)

Author	SHA1	Message	Date
Maisem Ali	3304819739	metrics: add histogram support ... Add initial histogram support. Updates tailscale/corp#8641 Signed-off-by: Maisem Ali <maisem@tailscale.com>	1 year ago
Andrew Lytvynov	96d7af3469	cmd/derper,tsweb: consistently add HTTP security headers (#8579) ... Add a few helper functions in tsweb to add common security headers to handlers. Use those functions for all non-tailscaled-facing endpoints in derper. Signed-off-by: Andrew Lytvynov <awly@tailscale.com>	1 year ago
Adrian Dewhurst	cd4c71c122	tstest: prepare for Clock API changes ... This change introduces tstime.NewClock and tstime.ClockOpts as a new way to construct tstime.Clock. This is a subset of #8464 as a stepping stone so that we can update our internal code to use the new API before making the second round of changes. Updates #8463 Change-Id: Ib26edb60e5355802aeca83ed60e4fdf806c90e27 Signed-off-by: Adrian Dewhurst <adrian@tailscale.com>	1 year ago
Brad Fitzpatrick	79ee6d6e1e	tsweb/varz: use default metrics.LabelMap.Label on serialization ... To not break Prometheus if the label is unset. Updates tailscale/corp#12830 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	1 year ago
Brad Fitzpatrick	eefee6f149	all: use cmpx.Or where it made sense ... I left a few out where writing it explicitly was better for various reasons. Updates #8296 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	1 year ago
James Tucker	5c38f0979e	tsweb/promvarz: fix repeated expvar definition in test ... expvar can only be defined once, so running tests with a repeat counter will fail if the variables are defined inside of the test function. Observed failure: ``` --- FAIL: TestHandler (0.00s) panic: Reuse of exported var name: gauge_promvarz_test_expvar [recovered] panic: Reuse of exported var name: gauge_promvarz_test_expvar goroutine 9 [running]: testing.tRunner.func1.2({0x100f267e0, 0x1400026e770}) /usr/local/go/src/testing/testing.go:1526 +0x1c8 testing.tRunner.func1() /usr/local/go/src/testing/testing.go:1529 +0x364 panic({0x100f267e0, 0x1400026e770}) /usr/local/go/src/runtime/panic.go:884 +0x1f4 log.Panicln({0x140000b8e20?, 0x1a?, 0x1400026e750?}) /usr/local/go/src/log/log.go:398 +0x60 expvar.Publish({0x100e2b21d, 0x1a}, {0x100fd7a08?, 0x140000232c0}) /usr/local/go/src/expvar/expvar.go:284 +0xc0 expvar.NewInt(...) /usr/local/go/src/expvar/expvar.go:304 tailscale.com/tsweb/promvarz.TestHandler(0x14000082b60) /Users/charlotte/ts-src/tailscale/tsweb/promvarz/promvarz_test.go:18 +0x5c testing.tRunner(0x14000082b60, 0x100fd5858) /usr/local/go/src/testing/testing.go:1576 +0x104 created by testing.(*T).Run /usr/local/go/src/testing/testing.go:1629 +0x370 FAIL tailscale.com/tsweb/promvarz 0.149s ``` Fixes #8065 Signed-off-by: James Tucker <james@tailscale.com>	2 years ago
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>	2 years ago
Anton Tolchanov	c153e6ae2f	prober: migrate to Prometheus metric library ... 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>	2 years ago
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](a5b5d5167f/cmd/tailcontrol/tailcontrol.go (L779)) Updates https://github.com/tailscale/corp/issues/10205 Signed-off-by: Anton Tolchanov <anton@tailscale.com>	2 years ago
Maisem Ali	1a30b2d73f	all: use tstest.Replace more ... Signed-off-by: Maisem Ali <maisem@tailscale.com>	2 years ago
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>	2 years ago
Brad Fitzpatrick	b1248442c3	all: update to Go 1.20, use strings.CutPrefix/Suffix instead of our fork ... Updates #7123 Updates #5309 Change-Id: I90bcd87a2fb85a91834a0dd4be6e03db08438672 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	2 years ago
Will Norris	10085063fb	util/vizerror: add As function to get wrapped Error ... Signed-off-by: Will Norris <will@tailscale.com>	2 years ago
Will Norris	51e1ab5560	fixup! util/vizerror: add new package for visible errors ... Signed-off-by: Will Norris <will@tailscale.com>	2 years ago
Will Norris	648aa00a28	fixup! util/vizerror: add new package for visible errors ... Signed-off-by: Will Norris <will@tailscale.com>	2 years ago
Will Norris	598ec463bc	fixup! util/vizerror: add new package for visible errors ... Signed-off-by: Will Norris <will@tailscale.com>	2 years ago
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>	2 years ago
Anton Tolchanov	f053f16460	tsweb: export version metrics to Prometheus ... This will allow tracking build versions and runtime versions in Prometheus. Signed-off-by: Anton Tolchanov <anton@tailscale.com>	2 years ago
Mihai Parparita	33520920c3	all: use strs.CutPrefix and strs.CutSuffix more ... Updates places where we use HasPrefix + TrimPrefix to use the combined function. Updates #5309 Signed-off-by: Mihai Parparita <mihai@tailscale.com>	2 years ago
Anton Tolchanov	f40bb199f5	tsweb: cache prometheus metric names & types ... Signed-off-by: Anton Tolchanov <anton@tailscale.com>	2 years ago
Anton Tolchanov	3c27632ffe	tsweb: avoid dashes in Prometheus metric names ... Ideally we should strip other invalid characters too, but that would call for a regexp replacement which increases the number of allocations and makes `TestVarzHandlerSorting` fail. Signed-off-by: Anton Tolchanov <anton@tailscale.com>	2 years ago
Brad Fitzpatrick	614a24763b	tsweb: sort top-level expvars after removing type prefixes ... Fixes #5778 Change-Id: I56c367338fa5686da288cc6545209ef4d6b88549 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	2 years ago
Brad Fitzpatrick	718914b697	tsweb: remove allocs introduced by earlier change ... This removes the ~9 allocs added by #5869, while still keeping struct fields sorted (the previous commit's tests still pass). And add a test to lock it in that this shouldn't allocate. Updates #5778 Change-Id: I4c12b9e2a1334adc1ea5aba1777681cb9fc18fbf Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	2 years ago
Hasnain Lakhani	8fe04b035c	tsweb: sort varz by name after stripping prefix (#5778) ... This makes it easier to view prometheus metrics. Added a test case which demonstrates the new behavior - the test initially failed as the output was ordered in the same order as the fields were declared in the struct (i.e. foo_a, bar_a, foo_b, bar_b). For that reason, I also had to change an existing test case to sort the fields in the new expected order. Signed-off-by: Hasnain Lakhani <m.hasnain.lakhani@gmail.com>	2 years ago
Will Norris	62bc1052a2	tsweb: allow HTTPError to unwrap errors ... Signed-off-by: Will Norris <will@tailscale.com>	2 years ago
Josh Soref	d4811f11a0	all: fix spelling mistakes ... Signed-off-by: Josh Soref <2119212+jsoref@users.noreply.github.com>	2 years ago
Mihai Parparita	c66e15772f	tsweb: consider 304s as successful for quiet logging ... Static resource handlers will generate lots of 304s, which are effectively successful responses. Signed-off-by: Mihai Parparita <mihai@tailscale.com>	2 years ago
Brad Fitzpatrick	aa5e494aba	tsweb: export go_version in standard expvar vars ... For monitoring. Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	2 years ago
Eng Zer Jun	f0347e841f	refactor: move from io/ioutil to io and os packages ... The io/ioutil package has been deprecated as of Go 1.16 [1]. This commit replaces the existing io/ioutil functions with their new definitions in io and os packages. Reference: https://golang.org/doc/go1.16#ioutil Signed-off-by: Eng Zer Jun <engzerjun@gmail.com>	2 years ago
Brad Fitzpatrick	116f55ff66	all: gofmt for Go 1.19 ... Updates #5210 Change-Id: Ib02cd5e43d0a8db60c1f09755a8ac7b140b670be Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	2 years ago
Joe Tsai	57275a4912	tsweb: add HTTPError.Header (#5251) ... The Header field allows the server to specify specific headers to set. Example use case: server returns 429 with the "Retry-After" header set. Signed-off-by: Joe Tsai <joetsai@digital-static.net>	2 years ago
Joe Tsai	a794963e2f	tsweb: mark AccessLogRecord fields as omitempty (#5250) ... If the field is the zero value, then avoid serializing the field. This reduces verbosity in server logs. Signed-off-by: Joe Tsai <joetsai@digital-static.net>	2 years ago
Brad Fitzpatrick	6a396731eb	all: use various net/netip parse funcs directly ... Mechanical change with perl+goimports. Changed {Must,}Parse{IP,IPPrefix,IPPort} to their netip variants, then goimports -d . Finally, removed the net/netaddr wrappers, to prevent future use. Updates #5162 Change-Id: I59c0e38b5fbca5a935d701645789cddf3d7863ad Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	2 years ago
Brad Fitzpatrick	7eaf5e509f	net/netaddr: start migrating to net/netip via new netaddr adapter package ... Updates #5162 Change-Id: Id7bdec303b25471f69d542f8ce43805328d56c12 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	2 years ago
Denton Gentry	755396d6fe	tsweb: add Float expvar support in varz ... We make assertions about stringification of 0.5. IEEE floating point and all reasonable proprietary floating point can exactly represent 0.5. We don't make assertions about other floating point values, too brittle in tests. Signed-off-by: Denton Gentry <dgentry@tailscale.com>	2 years ago
Tom DNetto	32c6823cf5	tsweb: implement interceptor for error page presentation ... Updates https://github.com/tailscale/corp/issues/5605 Signed-off-by: Tom DNetto <tom@tailscale.com>	2 years ago
Brad Fitzpatrick	0df3b76c25	tsweb: fix Port80Handler redirect to https with FQDN unset ... Fixes the current http://pkgs.tailscale.com/ redirect to https:/// as that server doesn't configure the Port80Handler.FQDN field. Change-Id: Iff56e6127a46c306ca97738d91b217bcab32a582 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
David Anderson	e1c1d47991	tsweb: memoize the string forms of HTTP response codes. ... Saves 1-2 allocs per HTTP request after warmup, thanks to avoiding strconv and fmt. Signed-off-by: David Anderson <danderson@tailscale.com>	3 years ago
David Anderson	c48513b2be	tsweb: support recording unabridged HTTP status codes as well. ... Signed-off-by: David Anderson <danderson@tailscale.com>	3 years ago
Brad Fitzpatrick	2d1849a7b9	tsweb: remove JSONHandlerFunc ... It's unused and we've decided it's not what we want. Change-Id: I425a0104e8869630b498a0adfd0f455876d6f92b Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
David Anderson	7b4960316b	tsweb: add PrometheusVar, for vars that want to output varz themselves. ... This enables the infrequent use of more complex Prometheus types, such as timeseries with high/irregular label cardinality, without needing to discover and implement generic abstracted type like LabelMap for each one. Signed-off-by: David Anderson <danderson@tailscale.com>	3 years ago
Maisem Ali	309c0a13a5	tsweb: add FQDN to Port80Handler to allow HTTPS redirects ... When the request comes in say over http://mon, the current implementation would rewrite it https://mon which causes the cert validation to fail. This PR keeps the existing behavior intact but also allows passing in a FQDN to the handler to reroute to the correct hostname. Related to https://github.com/tailscale/tailscale/pull/4208#pullrequestreview-913832340 Signed-off-by: Maisem Ali <maisem@tailscale.com>	3 years ago
Josh Bleecher Snyder	0868329936	all: use any instead of interface{} ... My favorite part of generics. Signed-off-by: Josh Bleecher Snyder <josh@tailscale.com>	3 years ago
Brad Fitzpatrick	61ee72940c	all: use Go 1.18's strings.Cut ... More remain. Change-Id: I6ec562cc1f687600758deae1c9d7dbd0d04004cb Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
Brad Fitzpatrick	24c9dbd129	tsweb: fix JSONHandlerFunc regression where HTTP status was lost on gzip ... Change-Id: Ia7add6cf7e8b46bb6dd45bd3c0371ea79402fb45 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
Brad Fitzpatrick	df8f02db3f	tsweb: add gzip support to JSONHandlerFunc ... Change-Id: I337e05f92f744bfc7e9d6fb8e67c87c191ba4da8 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
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>	3 years ago
nicksherron	f01ff18b6f	all: fix spelling mistakes ... Signed-off-by: nicksherron <nsherron90@gmail.com>	3 years ago
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>	3 years ago
slowy07	ac0353e982	fix: typo spelling grammar ... Signed-off-by: slowy07 <slowy.arfy@gmail.com>	3 years ago
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>	3 years ago
Brad Fitzpatrick	c6740da624	tsweb: make VarzHandler support untyped expvar.Maps for compatibility ... Updates #2635 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
Brad Fitzpatrick	7c7eb8094b	tsweb: make VarzHandler support expvar.Funcs returning ints/floats ... Updates #2635	3 years ago
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>	3 years ago
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>	3 years ago
Brad Fitzpatrick	5f45d8f8e6	tsweb: add VarzHandler tests ... Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
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>	3 years ago
David Anderson	0022c3d2e2	tsweb: replace NewMux with a more flexible DebugHandler. ... Signed-off-by: David Anderson <danderson@tailscale.com>	3 years ago
David Anderson	48c25fa36f	tsweb: fold StdHandlerOpts and StdHandler200s with StdHandler. ... Signed-off-by: David Anderson <danderson@tailscale.com>	3 years ago
David Anderson	72343fbbec	tsweb: register expvars once at startup. ... Signed-off-by: David Anderson <danderson@tailscale.com>	3 years ago
Josh Bleecher Snyder	516e8a4838	tsweb: add num_goroutines expvar ... Signed-off-by: Josh Bleecher Snyder <josh@tailscale.com>	4 years ago
David Anderson	692a011b54	net/interfaces: remove IsTailscaleIP, make callers use tsaddr. ... Signed-off-by: David Anderson <danderson@tailscale.com>	4 years ago
Brad Fitzpatrick	017dcd520f	tsweb: export VarzHandler	4 years ago
David Anderson	57cd7738c2	tsweb: add an endpoint to manually trigger a GC. ... Signed-off-by: David Anderson <danderson@tailscale.com>	4 years ago
chungdaniel	e7ac9a4b90	tsweb: refactor JSONHandler to take status code from error if it is present (#905) ... This change is to make JSONHandler error handling intuitive, as before there would be two sources of HTTP status code when HTTPErrors were generated: one as the first return value of the handler function, and one nested inside the HTTPError. Previously, it took the first return value as the status code, and ignored the code inside the HTTPError. Now, it should expect the first return value to be 0 if there is an error, and it takes the status code of the HTTPError to set as the response code. Signed-off-by: Daniel Chung <daniel@tailscale.com>	4 years ago
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>	4 years ago
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>	4 years ago
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>	4 years ago
David Crawshaw	dea3ef0597	tsweb: make JSONHandlerFunc implement ReturnHandler, not http.Handler ... This way something is capable of logging errors on the server. Fixes #766 Signed-off-by: David Crawshaw <crawshaw@tailscale.com>	4 years ago
halulu	1835bb6f85	tsweb: rewrite JSONHandler without using reflect (#684) ... Closes #656 #657 Signed-off-by: Zijie Lu <zijie@tailscale.com>	4 years ago
Zijie Lu	c9e40abfb8	tsweb: jsonhandler: fix content type ... Signed-off-by: Zijie Lu <zijie@tailscale.com>	4 years ago
Zijie Lu	d1a30be275	tsweb: JSONHandler: supports HTTPError ... Signed-off-by: Zijie Lu <zijie@tailscale.com>	5 years ago
Zijie Lu	5e1ee4be53	tsweb: fix JSONHandler nil response ... Signed-off-by: Zijie Lu <zijie@tailscale.com>	5 years ago
halulu	1d2e497d47	tsweb: JSONHandler using reflect (#437) ... Updates #395 #437 Signed-off-by: Zijie Lu <zijie@tailscale.com>	5 years ago
David Anderson	0038223632	tstest: rename from testy. ... Signed-off-by: David Anderson <danderson@tailscale.com>	5 years ago
David Anderson	eccae0cd0c	tsweb: add ReturnHandlerFunc. ... Signed-off-by: David Anderson <danderson@tailscale.com>	5 years ago
Brad Fitzpatrick	7bf436ba30	tsweb: add some Benchmarks ... Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	5 years ago
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>	5 years ago
David Anderson	b446de103a	tsweb: fix tests. ... Signed-off-by: David Anderson <dave@natulte.net>	5 years ago
David Anderson	af3a9dfad6	tsweb: add a StdHandler that doesn't log 200 responses. ... Signed-off-by: David Anderson <dave@natulte.net>	5 years ago
Brad Fitzpatrick	2863e49db9	tsweb: don't flush, treat no-op Handler as 200, like Go ... Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	5 years ago
David Anderson	5d995d9d6b	tsweb: add a test case for nil child errors in tsweb.Error. ... Signed-off-by: David Anderson <dave@natulte.net>	5 years ago
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>	5 years ago
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>	5 years ago
Brad Fitzpatrick	6de37f4cc0	tsweb: move some comments, add a TODO	5 years ago
David Anderson	df4636567f	tsweb: adjust names and docs of the "handler with errors" functions. ... Signed-off-by: David Anderson <dave@natulte.net>	5 years ago
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>	5 years ago
Brad Fitzpatrick	c706731dc7	tsweb: add copyright header ... And fix an unlikely but potential crash.	5 years ago
David Anderson	a567c56971	tsweb: pull in tlog data structures from corp repo. ... This is a prelude to having logging helpers in tsweb. Signed-off-by: David Anderson <dave@natulte.net>	5 years ago
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.	5 years ago
Brad Fitzpatrick	a9cd8f31de	tsweb: don't double import expvar; appease staticcheck	5 years ago
Brad Fitzpatrick	890f5dff40	tsweb: export runtime.MemStats var in Prometheus format	5 years ago
Brad Fitzpatrick	61f3fda405	tsweb: let expvar.Ints be gauges too	5 years ago
Brad Fitzpatrick	57de94c7aa	tsweb: add /debug/ access via &debugkey + TS_DEBUG_KEY_PATH	5 years ago
David Anderson	d580157921	tsweb: quote label values to comply with Prometheus format.	5 years ago
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>	5 years ago
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>	5 years ago
Brad Fitzpatrick	824f825552	tsweb, cmd/derper: move common web/debug stuff from derper to new tsweb ... Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	5 years ago