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ipn/ipnlocal: add a few metrics for PeerAPI and LocalAPI

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Mainly motivated by wanting to know how much Taildrop is used, but
also useful when tracking down how many invalid requests are
generated.

Signed-off-by: Mihai Parparita <mihai@tailscale.com>
This commit is contained in:
Mihai Parparita
2022-12-09 14:21:53 -08:00
committed by Mihai Parparita
parent 53e2010b8a
commit 47002d93a3
2 changed files with 27 additions and 0 deletions
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15
ipn/ipnlocal/peerapi.go
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@@ -678,6 +678,7 @@ func peerAPIRequestShouldGetSecurityHeaders(r *http.Request) bool {
func (h *peerAPIHandler) ServeHTTP(w http.ResponseWriter, r *http.Request) {
if err := h.validatePeerAPIRequest(r); err != nil {
metricInvalidRequests.Add(1)
h.logf("invalid request from %v: %v", h.remoteAddr, err)
http.Error(w, "invalid peerapi request", http.StatusForbidden)
return
@@ -688,10 +689,12 @@ func (h *peerAPIHandler) ServeHTTP(w http.ResponseWriter, r *http.Request) {
w.Header().Set("X-Content-Type-Options", "nosniff")
}
if strings.HasPrefix(r.URL.Path, "/v0/put/") {
metricPutCalls.Add(1)
h.handlePeerPut(w, r)
return
}
if strings.HasPrefix(r.URL.Path, "/dns-query") {
metricDNSCalls.Add(1)
h.handleDNSQuery(w, r)
return
}
@@ -712,12 +715,14 @@ func (h *peerAPIHandler) ServeHTTP(w http.ResponseWriter, r *http.Request) {
h.handleServeDNSFwd(w, r)
return
case "/v0/wol":
metricWakeOnLANCalls.Add(1)
h.handleWakeOnLAN(w, r)
return
case "/v0/interfaces":
h.handleServeInterfaces(w, r)
return
case "/v0/ingress":
metricIngressCalls.Add(1)
h.handleServeIngress(w, r)
return
}
@@ -1441,3 +1446,13 @@ func (fl *fakePeerAPIListener) Accept() (net.Conn, error) {
}
func (fl *fakePeerAPIListener) Addr() net.Addr { return fl.addr }
var (
metricInvalidRequests = clientmetric.NewCounter("peerapi_invalid_requests")
// Non-debug PeerAPI endpoints.
metricPutCalls = clientmetric.NewCounter("peerapi_put")
metricDNSCalls = clientmetric.NewCounter("peerapi_dns")
metricWakeOnLANCalls = clientmetric.NewCounter("peerapi_wol")
metricIngressCalls = clientmetric.NewCounter("peerapi_ingress")
)