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tailcfg: move LogHeapPprof from Debug to c2n [capver 69]

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And delete Debug.GoroutineDumpURL, which was already in c2n.

Updates #8923

Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
This commit is contained in:
Brad Fitzpatrick 2023-08-16 20:03:57 -07:00 committed by Brad Fitzpatrick
parent 24509f8b22
commit 239ad57446
10 changed files with 32 additions and 119 deletions
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5
cmd/tailscaled/depaware.txt
View File

@ -242,7 +242,6 @@ tailscale.com/cmd/tailscaled dependencies: (generated by github.com/tailscale/de
tailscale.com/ipn/store/mem from tailscale.com/ipn/store+
L tailscale.com/kube from tailscale.com/ipn/store/kubestore
tailscale.com/log/filelogger from tailscale.com/logpolicy
tailscale.com/log/logheap from tailscale.com/control/controlclient
tailscale.com/log/sockstatlog from tailscale.com/ipn/ipnlocal
tailscale.com/logpolicy from tailscale.com/cmd/tailscaled+
tailscale.com/logtail from tailscale.com/control/controlclient+
@ -325,7 +324,7 @@ tailscale.com/cmd/tailscaled dependencies: (generated by github.com/tailscale/de
💣 tailscale.com/util/deephash from tailscale.com/ipn/ipnlocal+
L 💣 tailscale.com/util/dirwalk from tailscale.com/metrics+
tailscale.com/util/dnsname from tailscale.com/hostinfo+
tailscale.com/util/goroutines from tailscale.com/control/controlclient+
tailscale.com/util/goroutines from tailscale.com/ipn/ipnlocal
tailscale.com/util/groupmember from tailscale.com/ipn/ipnauth
💣 tailscale.com/util/hashx from tailscale.com/util/deephash
tailscale.com/util/httpm from tailscale.com/client/tailscale+
@ -495,7 +494,7 @@ tailscale.com/cmd/tailscaled dependencies: (generated by github.com/tailscale/de
regexp from github.com/coreos/go-iptables/iptables+
regexp/syntax from regexp
runtime/debug from github.com/klauspost/compress/zstd+
runtime/pprof from tailscale.com/log/logheap+
runtime/pprof from net/http/pprof+
runtime/trace from net/http/pprof
slices from tailscale.com/wgengine/magicsock
sort from compress/flate+

40
control/controlclient/debug.go
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@ -1,40 +0,0 @@
// Copyright (c) Tailscale Inc & AUTHORS
// SPDX-License-Identifier: BSD-3-Clause
package controlclient
import (
"bytes"
"compress/gzip"
"context"
"log"
"net/http"
"time"
"tailscale.com/util/goroutines"
)
func dumpGoroutinesToURL(c *http.Client, targetURL string) {
ctx, cancel := context.WithTimeout(context.Background(), 15*time.Second)
defer cancel()
zbuf := new(bytes.Buffer)
zw := gzip.NewWriter(zbuf)
zw.Write(goroutines.ScrubbedGoroutineDump(true))
zw.Close()
req, err := http.NewRequestWithContext(ctx, "PUT", targetURL, zbuf)
if err != nil {
log.Printf("dumpGoroutinesToURL: %v", err)
return
}
req.Header.Set("Content-Encoding", "gzip")
t0 := time.Now()
_, err = c.Do(req)
d := time.Since(t0).Round(time.Millisecond)
if err != nil {
log.Printf("dumpGoroutinesToURL error: %v to %v (after %v)", err, targetURL, d)
} else {
log.Printf("dumpGoroutinesToURL complete to %v (after %v)", targetURL, d)
}
}

7
control/controlclient/direct.go
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@ -32,7 +32,6 @@
"tailscale.com/health"
"tailscale.com/hostinfo"
"tailscale.com/ipn/ipnstate"
"tailscale.com/log/logheap"
"tailscale.com/logtail"
"tailscale.com/net/dnscache"
"tailscale.com/net/dnsfallback"
@ -1096,12 +1095,6 @@ func (c *Direct) sendMapRequest(ctx context.Context, isStreaming bool, nu Netmap
logtail.Disable()
envknob.SetNoLogsNoSupport()
}
if resp.Debug.LogHeapPprof {
go logheap.LogHeap(resp.Debug.LogHeapURL)
}
if resp.Debug.GoroutineDumpURL != "" {
go dumpGoroutinesToURL(c.httpc, resp.Debug.GoroutineDumpURL)
}
if sleep := time.Duration(resp.Debug.SleepSeconds * float64(time.Second)); sleep > 0 {
if err := sleepAsRequested(ctx, c.logf, timeoutReset, sleep, c.clock); err != nil {
return err

9
ipn/ipnlocal/c2n.go
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@ -25,6 +25,8 @@
"tailscale.com/version/distro"
)
var c2nLogHeap func(http.ResponseWriter, *http.Request) // non-nil on most platforms (c2n_pprof.go)
func (b *LocalBackend) handleC2N(w http.ResponseWriter, r *http.Request) {
writeJSON := func(v any) {
w.Header().Set("Content-Type", "application/json")
@ -70,6 +72,13 @@ func (b *LocalBackend) handleC2N(w http.ResponseWriter, r *http.Request) {
res.Error = err.Error()
}
writeJSON(res)
case "/debug/logheap":
if c2nLogHeap != nil {
c2nLogHeap(w, r)
} else {
http.Error(w, "not implemented", http.StatusNotImplemented)
return
}
case "/ssh/usernames":
var req tailcfg.C2NSSHUsernamesRequest
if r.Method == "POST" {

17
ipn/ipnlocal/c2n_pprof.go Normal file
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@ -0,0 +1,17 @@
// Copyright (c) Tailscale Inc & AUTHORS
// SPDX-License-Identifier: BSD-3-Clause
//go:build !js && !wasm
package ipnlocal
import (
"net/http"
"runtime/pprof"
)
func init() {
c2nLogHeap = func(w http.ResponseWriter, r *http.Request) {
pprof.WriteHeapProfile(w)
}
}

45
log/logheap/logheap.go
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@ -1,45 +0,0 @@
// Copyright (c) Tailscale Inc & AUTHORS
// SPDX-License-Identifier: BSD-3-Clause
//go:build !js
// Package logheap logs a heap pprof profile.
package logheap
import (
"bytes"
"context"
"log"
"net/http"
"runtime"
"runtime/pprof"
"time"
)
// LogHeap uploads a JSON logtail record with the base64 heap pprof by means
// of an HTTP POST request to the endpoint referred to in postURL.
func LogHeap(postURL string) {
if postURL == "" {
return
}
runtime.GC()
buf := new(bytes.Buffer)
if err := pprof.WriteHeapProfile(buf); err != nil {
log.Printf("LogHeap: %v", err)
return
}
ctx, cancel := context.WithTimeout(context.Background(), 10*time.Second)
defer cancel()
req, err := http.NewRequestWithContext(ctx, "POST", postURL, buf)
if err != nil {
log.Printf("LogHeap: %v", err)
return
}
res, err := http.DefaultClient.Do(req)
if err != nil {
log.Printf("LogHeap: %v", err)
return
}
defer res.Body.Close()
}

7
log/logheap/logheap_js.go
View File

@ -1,7 +0,0 @@
// Copyright (c) Tailscale Inc & AUTHORS
// SPDX-License-Identifier: BSD-3-Clause
package logheap
func LogHeap(postURL string) {
}

16
tailcfg/tailcfg.go
View File

@ -106,7 +106,8 @@
// - 66: 2023-07-23: UserProfile.Groups added (available via WhoIs)
// - 67: 2023-07-25: Client understands PeerCapMap
// - 68: 2023-08-09: Client has dedicated updateRoutine; MapRequest.Stream true means ignore Hostinfo+Endpoints
const CurrentCapabilityVersion CapabilityVersion = 68
// - 69: 2023-08-16: removed Debug.LogHeap* + GoroutineDumpURL; added c2n /debug/logheap
const CurrentCapabilityVersion CapabilityVersion = 69
type StableID string
@ -1749,15 +1750,6 @@ type ControlIPCandidate struct {
//
// TODO(bradfitz): start migrating the imperative ones to c2n requests.
type Debug struct {
// LogHeapPprof controls whether the client should log
// its heap pprof data. Each true value sent from the server
// means that client should do one more log.
LogHeapPprof bool `json:",omitempty"`
// LogHeapURL is the URL to POST its heap pprof to.
// Empty means to not log.
LogHeapURL string `json:",omitempty"`
// ForceBackgroundSTUN controls whether magicsock should
// always do its background STUN queries (see magicsock's
// periodicReSTUN), regardless of inactivity.
@ -1787,10 +1779,6 @@ type Debug struct {
// disabled if WPAD is present on the network.
DisableSubnetsIfPAC opt.Bool `json:",omitempty"`
// GoroutineDumpURL, if non-empty, requests that the client do
// a one-time dump of its active goroutines to the given URL.
GoroutineDumpURL string `json:",omitempty"`
// SleepSeconds requests that the client sleep for the
// provided number of seconds.
// The client can (and should) limit the value (such as 5

1
tstest/iosdeps/iosdeps.go
View File

@ -42,7 +42,6 @@
_ "tailscale.com/ipn"
_ "tailscale.com/ipn/ipnlocal"
_ "tailscale.com/ipn/localapi"
_ "tailscale.com/log/logheap"
_ "tailscale.com/logtail"
_ "tailscale.com/logtail/filch"
_ "tailscale.com/net/dns"

4
types/netmap/netmap_test.go
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@ -71,9 +71,9 @@ func TestNetworkMapConcise(t *testing.T) {
name: "debug_values",
nm: &NetworkMap{
NodeKey: testNodeKey(1),
Debug: &tailcfg.Debug{LogHeapPprof: true},
Debug: &tailcfg.Debug{SetForceBackgroundSTUN: "true"},
},
want: "netmap: self: [AQEBA] auth=machine-unknown u=? debug={\"LogHeapPprof\":true} []\n",
want: "netmap: self: [AQEBA] auth=machine-unknown u=? debug={\"SetForceBackgroundSTUN\":true} []\n",
},
} {
t.Run(tt.name, func(t *testing.T) {