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usermetric: add initial user-facing metrics

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This commit adds a new usermetric package and wires
up metrics across the tailscale client.

Updates tailscale/corp#22075

Co-authored-by: Anton Tolchanov <anton@tailscale.com>
Signed-off-by: Kristoffer Dalby <kristoffer@tailscale.com>
This commit is contained in:
Kristoffer Dalby
2024-08-01 13:00:36 +02:00
committed by Kristoffer Dalby
parent 06c31f4e91
commit a2c42d3cd4
17 changed files with 368 additions and 22 deletions
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65
tsnet/tsnet_test.go
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@@ -31,8 +31,10 @@ import (
"testing"
"time"
"github.com/google/go-cmp/cmp"
"golang.org/x/net/proxy"
"tailscale.com/cmd/testwrapper/flakytest"
"tailscale.com/health"
"tailscale.com/ipn"
"tailscale.com/ipn/store/mem"
"tailscale.com/net/netns"
@@ -815,3 +817,66 @@ func TestUDPConn(t *testing.T) {
t.Errorf("got %q, want world", got)
}
}
func TestUserMetrics(t *testing.T) {
tstest.ResourceCheck(t)
ctx, cancel := context.WithTimeout(context.Background(), 30*time.Second)
defer cancel()
// testWarnable is a Warnable that is used within this package for testing purposes only.
var testWarnable = health.Register(&health.Warnable{
Code: "test-warnable-tsnet",
Title: "Test warnable",
Severity: health.SeverityLow,
Text: func(args health.Args) string {
return args[health.ArgError]
},
})
controlURL, c := startControl(t)
s1, _, s1PubKey := startServer(t, ctx, controlURL, "s1")
s1.lb.EditPrefs(&ipn.MaskedPrefs{
Prefs: ipn.Prefs{
AdvertiseRoutes: []netip.Prefix{
netip.MustParsePrefix("192.0.2.0/24"),
netip.MustParsePrefix("192.0.3.0/24"),
},
},
AdvertiseRoutesSet: true,
})
c.SetSubnetRoutes(s1PubKey, []netip.Prefix{netip.MustParsePrefix("192.0.2.0/24")})
lc1, err := s1.LocalClient()
if err != nil {
t.Fatal(err)
}
ht := s1.lb.HealthTracker()
ht.SetUnhealthy(testWarnable, health.Args{"Text": "Hello world 1"})
metrics1, err := lc1.UserMetrics(ctx)
if err != nil {
t.Fatal(err)
}
// Note that this test will check for two warnings because the health
// tracker will have two warnings: one from the testWarnable, added in
// this test, and one because we are running the dev/unstable version
// of tailscale.
want := `# TYPE tailscaled_advertised_routes gauge
# HELP tailscaled_advertised_routes Number of advertised network routes (e.g. by a subnet router)
tailscaled_advertised_routes 2
# TYPE tailscaled_health_messages gauge
# HELP tailscaled_health_messages Number of health messages broken down by type.
tailscaled_health_messages{type="warning"} 2
# TYPE tailscaled_inbound_dropped_packets_total counter
# HELP tailscaled_inbound_dropped_packets_total Counts the number of dropped packets received by the node from other peers
# TYPE tailscaled_outbound_dropped_packets_total counter
# HELP tailscaled_outbound_dropped_packets_total Counts the number of packets dropped while being sent to other peers
`
if diff := cmp.Diff(want, string(metrics1)); diff != "" {
t.Fatalf("unexpected metrics (-want +got):\n%s", diff)
}
}