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util/clientmetrics: add new package to add metrics to the client

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And annotate magicsock as a start.

And add localapi and debug handlers with the Prometheus-format
exporter.

Updates #3307

Change-Id: I47c5d535fe54424741df143d052760387248f8d3
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
This commit is contained in:
Brad Fitzpatrick
2020-12-13 18:51:24 -08:00
committed by Brad Fitzpatrick
parent c5d572f371
commit 57b039c51d
10 changed files with 248 additions and 4 deletions
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1
cmd/tailscaled/depaware.txt
View File

@@ -221,6 +221,7 @@ tailscale.com/cmd/tailscaled dependencies: (generated by github.com/tailscale/de
tailscale.com/types/persist from tailscale.com/control/controlclient+
tailscale.com/types/preftype from tailscale.com/ipn+
tailscale.com/types/structs from tailscale.com/control/controlclient+
tailscale.com/util/clientmetric from tailscale.com/ipn/localapi+
L tailscale.com/util/cmpver from tailscale.com/net/dns
💣 tailscale.com/util/deephash from tailscale.com/ipn/ipnlocal+
tailscale.com/util/dnsname from tailscale.com/hostinfo+

7
cmd/tailscaled/tailscaled.go
View File

@@ -39,6 +39,7 @@ import (
"tailscale.com/safesocket"
"tailscale.com/types/flagtype"
"tailscale.com/types/logger"
"tailscale.com/util/clientmetric"
"tailscale.com/util/multierr"
"tailscale.com/util/osshare"
"tailscale.com/version"
@@ -478,6 +479,7 @@ func tryEngine(logf logger.Logf, linkMon *monitor.Mon, name string) (e wgengine.
func newDebugMux() *http.ServeMux {
mux := http.NewServeMux()
mux.HandleFunc("/debug/metrics", servePrometheusMetrics)
mux.HandleFunc("/debug/pprof/", pprof.Index)
mux.HandleFunc("/debug/pprof/cmdline", pprof.Cmdline)
mux.HandleFunc("/debug/pprof/profile", pprof.Profile)
@@ -486,6 +488,11 @@ func newDebugMux() *http.ServeMux {
return mux
}
func servePrometheusMetrics(w http.ResponseWriter, r *http.Request) {
w.Header().Set("Content-Type", "text/plain")
clientmetric.WritePrometheusExpositionFormat(w)
}
func runDebugServer(mux *http.ServeMux, addr string) {
srv := &http.Server{
Addr: addr,