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cmd/tailscale/cli: add 'tailscale metrics' command
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Browse Source 
- `tailscale metrics print`: to show metric values in console
- `tailscale metrics write`: to write metrics to a file (with a tempfile
  & rename dance, which is atomic on Unix).

Also, remove the `TS_DEBUG_USER_METRICS` envknob as we are getting
more confident in these metrics.

Updates tailscale/corp#22075

Signed-off-by: Anton Tolchanov <anton@tailscale.com>
This commit is contained in:
Anton Tolchanov
2024-10-26 18:28:22 +01:00
committed by Anton Tolchanov
parent 38af62c7b3
commit 9545e36007
3 changed files with 91 additions and 9 deletions
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11
ipn/localapi/localapi.go
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@@ -62,7 +62,6 @@ import (
"tailscale.com/util/osdiag"
"tailscale.com/util/progresstracking"
"tailscale.com/util/rands"
"tailscale.com/util/testenv"
"tailscale.com/version"
"tailscale.com/wgengine/magicsock"
)
@@ -570,15 +569,9 @@ func (h *Handler) serveMetrics(w http.ResponseWriter, r *http.Request) {
clientmetric.WritePrometheusExpositionFormat(w)
}
// TODO(kradalby): Remove this once we have landed on a final set of
// metrics to export to clients and consider the metrics stable.
var debugUsermetricsEndpoint = envknob.RegisterBool("TS_DEBUG_USER_METRICS")
// serveUserMetrics returns user-facing metrics in Prometheus text
// exposition format.
func (h *Handler) serveUserMetrics(w http.ResponseWriter, r *http.Request) {
if !testenv.InTest() && !debugUsermetricsEndpoint() {
http.Error(w, "usermetrics debug flag not enabled", http.StatusForbidden)
return
}
h.b.UserMetricsRegistry().Handler(w, r)
}