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ipn/ipnlocal: add metric for advertised routes

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Updates tailscale/corp#22075

Signed-off-by: Kristoffer Dalby <kristoffer@tailscale.com>
This commit is contained in:
Kristoffer Dalby
2024-08-01 15:33:53 +02:00
parent 4036b3ad93
commit 1952888785
1 changed files with 17 additions and 0 deletions
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17
ipn/ipnlocal/local.go
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@@ -12,6 +12,7 @@ import (
"encoding/base64" "encoding/base64"
"encoding/json" "encoding/json"
"errors" "errors"
"expvar"
"fmt" "fmt"
"io" "io"
"log" "log"
@@ -60,6 +61,7 @@ import (
"tailscale.com/ipn/policy" "tailscale.com/ipn/policy"
"tailscale.com/log/sockstatlog" "tailscale.com/log/sockstatlog"
"tailscale.com/logpolicy" "tailscale.com/logpolicy"
"tailscale.com/metrics"
"tailscale.com/net/captivedetection" "tailscale.com/net/captivedetection"
"tailscale.com/net/dns" "tailscale.com/net/dns"
"tailscale.com/net/dnscache" "tailscale.com/net/dnscache"
@@ -4614,6 +4616,12 @@ func unmapIPPrefixes(ippsList ...[]netip.Prefix) (ret []netip.Prefix) {
return ret return ret
} }
var metricAdvertisedRoutes = metrics.NewMultiLabelMap[struct{}](
"tailscaled_advertised_routes",
"gauge",
"Number of subnet routes advertised by the node. (excluding exit node /0 routes)",
)
// b.mu must be held. // b.mu must be held.
func (b *LocalBackend) applyPrefsToHostinfoLocked(hi *tailcfg.Hostinfo, prefs ipn.PrefsView) { func (b *LocalBackend) applyPrefsToHostinfoLocked(hi *tailcfg.Hostinfo, prefs ipn.PrefsView) {
if h := prefs.Hostname(); h != "" { if h := prefs.Hostname(); h != "" {
@@ -4624,6 +4632,15 @@ func (b *LocalBackend) applyPrefsToHostinfoLocked(hi *tailcfg.Hostinfo, prefs ip
hi.ShieldsUp = prefs.ShieldsUp() hi.ShieldsUp = prefs.ShieldsUp()
hi.AllowsUpdate = envknob.AllowsRemoteUpdate() || prefs.AutoUpdate().Apply.EqualBool(true) hi.AllowsUpdate = envknob.AllowsRemoteUpdate() || prefs.AutoUpdate().Apply.EqualBool(true)
// count routes without exit node routes
routeCount := expvar.Int{}
for _, route := range hi.RoutableIPs {
if route.Bits() != 0 {
routeCount.Add(1)
}
}
metricAdvertisedRoutes.Set(struct{}{}, &routeCount)
var sshHostKeys []string var sshHostKeys []string
if prefs.RunSSH() && envknob.CanSSHD() { if prefs.RunSSH() && envknob.CanSSHD() {
// TODO(bradfitz): this is called with b.mu held. Not ideal. // TODO(bradfitz): this is called with b.mu held. Not ideal.