From 8ec5d895ee44d0beb20703342e7640ff1b5d8fbb Mon Sep 17 00:00:00 2001
From: Graham McIntire <graham@mcintire.me>
Date: Tue, 21 Apr 2026 16:34:04 -0500
Subject: [PATCH] chore(logs): suppress Phoenix Sent log for /live liveness
 probe

/live fires every 10s per pod; the request line and Sent 200 response
from Plug.Telemetry drowned out real requests. log_level/1 now returns
false for /live too, same treatment /health already got.
---
 lib/microwaveprop_web/endpoint.ex              |  1 +
 test/microwaveprop/propagation_test.exs        |  4 ++--
 .../metrics_log_suppression_test.exs           | 18 ++++++++++++++++++
 3 files changed, 21 insertions(+), 2 deletions(-)

diff --git a/lib/microwaveprop_web/endpoint.ex b/lib/microwaveprop_web/endpoint.ex
index 140aa54e..1586f508 100644
--- a/lib/microwaveprop_web/endpoint.ex
+++ b/lib/microwaveprop_web/endpoint.ex
@@ -68,6 +68,7 @@ defmodule MicrowavepropWeb.Endpoint do
   # `path_info` never matches. `request_path` is set once by the adapter
   # and is stable across forward, so it's the reliable discriminator.
   def log_level(%{request_path: "/health"}), do: false
+  def log_level(%{request_path: "/live"}), do: false
   def log_level(%{request_path: "/metrics"}), do: false
   def log_level(%{request_path: "/metrics/" <> _}), do: false
   def log_level(%{method: "HEAD"}), do: false
diff --git a/test/microwaveprop/propagation_test.exs b/test/microwaveprop/propagation_test.exs
index dddd141a..c1bca60b 100644
--- a/test/microwaveprop/propagation_test.exs
+++ b/test/microwaveprop/propagation_test.exs
@@ -20,12 +20,12 @@ defmodule Microwaveprop.PropagationTest do
 
     :ets.match_delete(
       :microwaveprop_cache,
-      {{Microwaveprop.Propagation.ProfilesFile, :_, :_, :_}, :_, :_}
+      {{ProfilesFile, :_, :_, :_}, :_, :_}
     )
 
     :ets.match_delete(
       :microwaveprop_cache,
-      {{Microwaveprop.Propagation.ProfilesFile, :_, :_}, :_, :_}
+      {{ProfilesFile, :_, :_}, :_, :_}
     )
 
     :ok
diff --git a/test/microwaveprop_web/metrics_log_suppression_test.exs b/test/microwaveprop_web/metrics_log_suppression_test.exs
index c13c75ff..1c18cb29 100644
--- a/test/microwaveprop_web/metrics_log_suppression_test.exs
+++ b/test/microwaveprop_web/metrics_log_suppression_test.exs
@@ -38,6 +38,24 @@ defmodule MicrowavepropWeb.MetricsLogSuppressionTest do
     refute log =~ "Sent 200"
   end
 
+  test "GET /live does not emit a Phoenix endpoint Sent log line", %{conn: conn} do
+    log =
+      capture_log([level: :info], fn ->
+        conn = get(conn, "/live")
+        assert conn.status == 200
+      end)
+
+    refute log =~ "Sent 200"
+    refute log =~ "GET /live"
+  end
+
+  test "log_level/1 returns false for /live", %{conn: _conn} do
+    assert MicrowavepropWeb.Endpoint.log_level(%{
+             request_path: "/live",
+             method: "GET"
+           }) == false
+  end
+
   test "log_level/1 returns false for the rewritten conn shape produced by forward", %{
     conn: _conn
   } do