tailscale

Commit Graph

Author	SHA1	Message	Date
Joe Tsai	7a77a2edf1	logtail: optimize JSON processing (#11671 ) Changes made: * Avoid "encoding/json" for JSON processing, and instead use "github.com/go-json-experiment/json/jsontext". Use jsontext.Value.IsValid for validation, which is much faster. Use jsontext.AppendQuote instead of our own JSON escaping. * In drainPending, use a different maxLen depending on lowMem. In lowMem mode, it is better to perform multiple uploads than it is to construct a large body that OOMs the process. * In drainPending, if an error is encountered draining, construct an error message in the logtail JSON format rather than something that is invalid JSON. * In appendTextOrJSONLocked, use jsontext.Decoder to check whether the input is a valid JSON object. This is faster than the previous approach of unmarshaling into map[string]any and then re-marshaling that data structure. This is especially beneficial for network flow logging, which produces relatively large JSON objects. * In appendTextOrJSONLocked, enforce maxSize on the input. If too large, then we may end up in a situation where the logs can never be uploaded because it exceeds the maximum body size that the Tailscale logs service accepts. * Use "tailscale.com/util/truncate" to properly truncate a string on valid UTF-8 boundaries. * In general, remove unnecessary spaces in JSON output. Performance: name old time/op new time/op delta WriteText 776ns ± 2% 596ns ± 1% -23.24% (p=0.000 n=10+10) WriteJSON 110µs ± 0% 9µs ± 0% -91.77% (p=0.000 n=8+8) name old alloc/op new alloc/op delta WriteText 448B ± 0% 0B -100.00% (p=0.000 n=10+10) WriteJSON 37.9kB ± 0% 0.0kB ± 0% -99.87% (p=0.000 n=10+10) name old allocs/op new allocs/op delta WriteText 1.00 ± 0% 0.00 -100.00% (p=0.000 n=10+10) WriteJSON 1.08k ± 0% 0.00k ± 0% -99.91% (p=0.000 n=10+10) For text payloads, this is 1.30x faster. For JSON payloads, this is 12.2x faster. Updates #cleanup Updates tailscale/corp#18514 Signed-off-by: Joe Tsai <joetsai@digital-static.net>	8 months ago
Joe Tsai	b4ba492701	logtail: require Buffer.Write to not retain the provided slice (#11617 ) Buffer.Write has the exact same signature of io.Writer.Write. The latter requires that implementations to never retain the provided input buffer, which is an expectation that most users will have when they see a Write signature. The current behavior of Buffer.Write where it does retain the input buffer is a risky precedent to set. Switch the behavior to match io.Writer.Write. There are only two implementations of Buffer in existence: * logtail.memBuffer * filch.Filch The former can be fixed by cloning the input to Write. This will cause an extra allocation in every Write, but we can fix that will pooling on the caller side in a follow-up PR. The latter only passes the input to os.File.Write, which does respect the io.Writer.Write requirements. Updates #cleanup Updates tailscale/corp#18514 Signed-off-by: Joe Tsai <joetsai@digital-static.net>	8 months ago
Brad Fitzpatrick	ec87e219ae	logtail: delete unused code from old way to configure zstd Updates #cleanup Change-Id: I666ecf08ea67e461adf2a3f4daa9d1753b2dc1e4 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	8 months ago
Joe Tsai	e2586bc674	logtail: always zstd compress with FastestCompression and LowMemory (#11583 ) This is based on empirical testing using actual logs data. FastestCompression only incurs a marginal <1% compression ratio hit for a 2.25x reduction in memory use for small payloads (which are common if log uploads happen at a decently high frequency). The memory savings for large payloads is much lower (less than 1.1x reduction). LowMemory only incurs a marginal <5% hit on performance for a 1.6-2.0x reduction in memory use for small or large payloads. The memory gains for both settings justifies the loss of benefits, which are arguably minimal. tailscale/corp#18514 Signed-off-by: Joe Tsai <joetsai@digital-static.net>	8 months ago
Brad Fitzpatrick	e7599c1f7e	logtail: prevent js/wasm clients from picking TLS client cert Corp details: https://github.com/tailscale/corp/issues/18177#issuecomment-2026598715 https://github.com/tailscale/corp/pull/18775#issuecomment-2027505036 Updates tailscale/corp#18177 Change-Id: I7c03a4884540b8519e0996088d085af77991f477 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	8 months ago
Brad Fitzpatrick	6d90966c1f	logtail: move a scratch buffer to Logger Rather than pass around a scratch buffer, put it on the Logger. This is a baby step towards removing the background uploading goroutine and starting it as needed. Updates tailscale/corp#18514 (insofar as it led me to look at this code) Change-Id: I6fd94581c28bde40fdb9fca788eb9590bcedae1b Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	8 months ago
Joe Tsai	85febda86d	all: use zstdframe where sensible (#11491 ) Use the zstdframe package where sensible instead of plumbing around our own zstd.Encoder just for stateless operations. This causes logtail to have a dependency on zstd, but that's arguably okay since zstd support is implicit to the protocol between a client and the logging service. Also, virtually every caller to logger.NewLogger was manually setting up a zstd.Encoder anyways, meaning that zstd was functionally always a dependency. Updates #cleanup Updates tailscale/corp#18514 Signed-off-by: Joe Tsai <joetsai@digital-static.net>	8 months ago
as2643	3fb6ee7fdb	tailscale/logtail: redact public ipv6 and ipv4 ip addresses within tailscaled. (#10531 ) Updates #15664 Signed-off-by: Anishka Singh <anishkasingh66@gmail.com>	12 months ago
Brad Fitzpatrick	d852c616c6	logtail: fix Logger.Write return result io.Writer says you need to write completely on err=nil. (the result int should be the same as the input buffer length) We weren't doing that. We used to, but at some point the verbose filtering was modifying buf before the final return of len(buf). We've been getting lucky probably, that callers haven't looked at our results and turned us into a short write error. Updates #cleanup Updates tailscale/corp#15664 Change-Id: I01e765ba35b86b759819e38e0072eceb9d10d75c Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	1 year ago
Andrea Barisani	d61494db68	adjust build tags for tamago Signed-off-by: Andrea Barisani <andrea@inversepath.com>	1 year ago
Andrea Barisani	0a74d46568	adjust build tags for tamago Signed-off-by: Andrea Barisani <andrea@inversepath.com>	1 year ago
Brad Fitzpatrick	98a5116434	all: adjust some build tags for plan9 I'm not saying it works, but it compiles. Updates #5794 Change-Id: I2f3c99732e67fe57a05edb25b758d083417f083e Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	1 year ago
Brad Fitzpatrick	9089efea06	net/netmon: make ChangeFunc's signature take new ChangeDelta, not bool Updates #9040 Change-Id: Ia43752064a1a6ecefc8802b58d6eaa0b71cf1f84 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	1 year ago
Claire Wang	e1bcecc393	logtail: use tstime (#8607 ) Updates #8587 Signed-off-by: Claire Wang <claire@tailscale.com>	1 year ago
Joe Tsai	49015b00fe	logtail: fix race condition with sockstats label (#8578 ) Updates tailscale/corp#8427 Signed-off-by: Joe Tsai <joetsai@digital-static.net>	1 year ago
Brad Fitzpatrick	67e912824a	all: adjust some build tags for wasi A start. Updates #8320 Change-Id: I64057f977be51ba63ce635c56d67de7ecec415d1 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	1 year ago
Joe Tsai	84c99fe0d9	logtail: be less aggressive about re-uploads (#8117 ) The retry logic was pathological in the following ways: * If we restarted the logging service, any pending uploads would be placed in a retry-loop where it depended on backoff.Backoff, which was too aggresive. It would retry failures within milliseconds, taking at least 10 retries to hit a delay of 1 second. * In the event where a logstream was rate limited, the aggressive retry logic would severely exacerbate the problem since each retry would also log an error message. It is by chance that the rate of log error spam does not happen to exceed the rate limit itself. We modify the retry logic in the following ways: * We now respect the "Retry-After" header sent by the logging service. * Lacking a "Retry-After" header, we retry after a hard-coded period of 30 to 60 seconds. This avoids the thundering-herd effect when all nodes try reconnecting to the logging service at the same time after a restart. * We do not treat a status 400 as having been uploaded. This is simply not the behavior of the logging service. Updates #tailscale/corp#11213 Signed-off-by: Joe Tsai <joetsai@digital-static.net>	2 years ago
Mihai Parparita	4722f7e322	all: move network monitoring from wgengine/monitor to net/netmon We're using it in more and more places, and it's not really specific to our use of Wireguard (and does more just link/interface monitoring). Also removes the separate interface we had for it in sockstats -- it's a small enough package (we already pull in all of its dependencies via other paths) that it's not worth the extra complexity. Updates #7621 Updates #7850 Signed-off-by: Mihai Parparita <mihai@tailscale.com>	2 years ago
Mihai Parparita	edb02b63f8	net/sockstats: pass in logger to sockstats.WithSockStats Using log.Printf may end up being printed out to the console, which is not desirable. I noticed this when I was investigating some client logs with `sockstats: trace "NetcheckClient" was overwritten by another`. That turns to be harmless/expected (the netcheck client will fall back to the DERP client in some cases, which does its own sockstats trace). However, the log output could be visible to users if running the `tailscale netcheck` CLI command, which would be needlessly confusing. Updates tailscale/corp#9230 Signed-off-by: Mihai Parparita <mihai@tailscale.com>	2 years ago
Will Norris	62a1e9a44f	log/sockstatlog: add delay before writing logs to disk Split apart polling of sockstats and logging them to disk. Add a 3 second delay before writing logs to disk to prevent an infinite upload loop when uploading stats to logcatcher. Fixes #7719 Signed-off-by: Will Norris <will@tailscale.com>	2 years ago
Mihai Parparita	a2be1aabfa	logtail: remove unncessary response read Effectively reverts #249, since the server side was fixed (with #251?) to send a 200 OK/content-length 0 response. Signed-off-by: Mihai Parparita <mihai@tailscale.com>	2 years ago
Mihai Parparita	6ac6ddbb47	sockstats: switch label to enum Makes it cheaper/simpler to persist values, and encourages reuse of labels as opposed to generating an arbitrary number. Updates tailscale/corp#9230 Updates #3363 Signed-off-by: Mihai Parparita <mihai@tailscale.com>	2 years ago
Maisem Ali	1a30b2d73f	all: use tstest.Replace more Signed-off-by: Maisem Ali <maisem@tailscale.com>	2 years ago
Joe Tsai	283a84724f	types/logid: simplify implementation (#7415 ) Share the same underlying implementation for both PrivateID and PublicID. For the shared methods, declare them in the same order. Only keep documentation on methods without obvious meaning. Signed-off-by: Joe Tsai <joetsai@digital-static.net>	2 years ago
Joe Tsai	7e4788e383	logtail: delete ID types and functions (#7412 ) These have been moved to the types/logid package. Signed-off-by: Joe Tsai <joetsai@digital-static.net>	2 years ago
Mihai Parparita	9cb332f0e2	sockstats: instrument networking code paths Uses the hooks added by tailscale/go#45 to instrument the reads and writes on the major code paths that do network I/O in the client. The convention is to use "<package>.<type>:<label>" as the annotation for the responsible code path. Enabled on iOS, macOS and Android only, since mobile platforms are the ones we're most interested in, and we are less sensitive to any throughput degradation due to the per-I/O callback overhead (macOS is also enabled for ease of testing during development). For now just exposed as counters on a /v0/sockstats PeerAPI endpoint. We also keep track of the current interface so that we can break out the stats by interface. Updates tailscale/corp#9230 Updates #3363 Signed-off-by: Mihai Parparita <mihai@tailscale.com>	2 years ago
Joe Tsai	0d19f5d421	all: replace logtail.{Public,Private}ID with logid.{Public,Private}ID (#7404 ) The log ID types were moved to a separate package so that code that only depend on log ID types do not need to link in the logic for the logtail client itself. Not all code need the logtail client. Signed-off-by: Joe Tsai <joetsai@digital-static.net>	2 years ago
David Crawshaw	46467e39c2	logtail: allow multiple calls to Shutdown Signed-off-by: David Crawshaw <crawshaw@tailscale.com>	2 years ago
Mihai Parparita	f0f2b2e22b	logtail: increase maximum log line size in low memory mode The 255 byte limit was chosen more than 3 years ago (tailscale/corp@929635c9d9), when iOS was operating under much more significant memory constraints. With iOS 15 the network extension has an increased limit, so increasing it to 4K should be fine. The motivating factor was that the network interfaces being logged by linkChange in wgengine/userspace.go were getting truncated, and it would be useful to know why in some cases we're choosing the pdp_ip1 cell interface instead of the pdp_ip0 one. Updates #7184 Updates #7188 Signed-off-by: Mihai Parparita <mihai@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
Brad Fitzpatrick	b657187a69	cmd/tailscale, logtail: add 'tailscale debug daemon-logs' logtail mechanism Fixes #6836 Change-Id: Ia6eb39ff8972e1aa149aeeb63844a97497c2cf04 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	2 years ago
Brad Fitzpatrick	69c0b7e712	ipn/ipnlocal: add c2n handler to flush logtail for support debugging Updates tailscale/corp#8564 Change-Id: I0c619d4007069f90cffd319fba66bd034d63e84d Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	2 years ago
Mihai Parparita	8f2bc0708b	logtail: make logs flush delay dynamic Instead of a static FlushDelay configuration value, use a FlushDelayFn function that we invoke every time we decide send logs. This will allow mobile clients to be more dynamic about when to send logs. Updates #6768 Signed-off-by: Mihai Parparita <mihai@tailscale.com>	2 years ago
Joe Tsai	35c10373b5	types/logid: move logtail ID types here (#6336 ) Many packages reference the logtail ID types, but unfortunately pull in the transitive dependencies of logtail. Fix this problem by putting the log ID types in its own package with minimal dependencies. Signed-off-by: Joe Tsai <joetsai@digital-static.net>	2 years ago
Joe Tsai	eff62b7b1b	logtail: remove MustParsePublicID (#6335 ) This function is no longer necessary as you can trivially rewrite: logtail.MustParsePublicID(...) with: must.Get(logtail.ParsePublicID(...)) Signed-off-by: Joe Tsai <joetsai@digital-static.net>	2 years ago
Brad Fitzpatrick	da8def8e13	all: remove old +build tags The //go:build syntax was introduced in Go 1.17: https://go.dev/doc/go1.17#build-lines gofmt has kept the +build and go:build lines in sync since then, but enough time has passed. Time to remove them. Done with: perl -i -npe 's,^// \+build.*\n,,' $(git grep -l -F '+build') Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	2 years ago
Brad Fitzpatrick	a04f1ff9e6	logtail: default to 2s log flush delay on all platforms Per chat. This is close enough to realtime but massively reduces number of HTTP requests. (which you can verify with TS_DEBUG_LOGTAIL_WAKES and watching tailscaled run at start) By contrast, this is set to 2 minutes on mobile. Change-Id: Id737c7924d452de5c446df3961f5e94a43a33f1f Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	2 years ago
Brad Fitzpatrick	a315336287	logtail: change batched upload mechanism to not use CPU when idle The mobile implementation had a 2 minute ticker going all the time to do a channel send. Instead, schedule it as needed based on activity. Then we can be actually idle for long periods of time. Updates #3363 Change-Id: I0dba4150ea7b94f74382fbd10db54a82f7ef6c29 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	2 years ago
Joe Tsai	3af0d4d0f2	logtail: always record timestamps in UTC (#5732 ) Upstream optimizations to the Go time package will make unmarshaling of time.Time 3-6x faster. See: * https://go.dev/cl/425116 * https://go.dev/cl/425197 * https://go.dev/cl/429862 The last optimization avoids a []byte -> string allocation if the timestamp string less than than 32B. Unfortunately, the presence of a timezone breaks that optimization. Drop recording of timezone as this is non-essential information. Most of the performance gains is upon unmarshal, but there is also a slight performance benefit to not marshaling the timezone as well. Signed-off-by: Joe Tsai <joetsai@digital-static.net>	2 years ago
Joe Tsai	c321363d2c	logtail: support a copy ID (#5851 ) The copy ID operates similar to a CC in email where a message is sent to both the primary ID and also the copy ID. A given log message is uploaded once, but the log server records it twice for each ID. Signed-off-by: Joe Tsai <joetsai@digital-static.net>	2 years ago
Josh Soref	d4811f11a0	all: fix spelling mistakes Signed-off-by: Josh Soref <2119212+jsoref@users.noreply.github.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
Joe Tsai	21cd402204	logtail: do not log when backing off (#5485 )	2 years ago
Mihai Parparita	f371a1afd9	cmd/tsconnect: make logtail uploading work Initialize logtail and provide an uploader that works in the browser (we make a no-cors cross-origin request to avoid having to open up the logcatcher servers to CORS). Fixes #5147 Signed-off-by: Mihai Parparita <mihai@tailscale.com>	2 years ago
Brad Fitzpatrick	4950fe60bd	syncs, all: move to using Go's new atomic types instead of ours Fixes #5185 Change-Id: I850dd532559af78c3895e2924f8237ccc328449d Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	2 years ago
Brad Fitzpatrick	5381437664	logtail, net/portmapper, wgengine/magicsock: use fmt.Appendf Fixes #5206 Change-Id: I490bb92e774ce7c044040537e2cd864fcf1dbe5a Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	2 years ago
Brad Fitzpatrick	48e73e147a	logtail,logpolicy: tweak minor cosmetic things Just reading the code again in prep for some alloc reductions. Change-Id: I065226ea794b7ec7144c2b15942d35131c9313a8 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	2 years ago
Joe Tsai	96f73b3894	logtail: do not panic in PrivateID.PublicID (#4815 ) It is not idiomatic for Go code to panic for situations that can be normal. For example, if a server receives PrivateID from a client, it is normal for the server to call PrivateID.PublicID to validate that the PublicID matches. However, doing so would panic prior to this change. Signed-off-by: Joe Tsai <joetsai@digital-static.net>	3 years ago
Brad Fitzpatrick	02e580c1d2	logtail: use http.NewRequestWithContext Saves some allocs. Not hot, but because we can now. And a const instead of a var. Change-Id: Ieb2b64534ed38051c36b2c0aa2e82739d9d0e015 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
Mihai Parparita	3222bce02d	logtail: add instance metadata to the entry logtail Allows instances that are running with the same machine ID (due to cloning) to be distinguished. Also adds sequence numbers to detect duplicates. For tailscale/corp#5244 Signed-off-by: Mihai Parparita <mihai@tailscale.com>	3 years ago

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111 Commits (7e2b4268d64ed95f4592f930ac5cd4b821c3a22d)