ignore startup errors

config/config.exs

@@ -21,7 +21,8 @@ config :honeybadger,
   api_key: "hbp_xe5xMnpLZ2XJsXQJujoEkgCmiqCfwa0uYA3Y",
   environment_name: config_env(),
   insights_enabled: true,
-  use_logger: true
+  use_logger: true,
+  filter: Towerops.HoneybadgerFilter
 
 # Configure Elixir's Logger
 config :logger, :default_formatter,

lib/towerops/honeybadger_filter.ex

@@ -0,0 +1,30 @@
+defmodule Towerops.HoneybadgerFilter do
+  @moduledoc """
+  Custom Honeybadger filter to exclude noisy errors during deployments.
+
+  Filters out os_mon supervisor errors (memsup, cpu_sup) that occur
+  during normal node shutdown/restart.
+  """
+
+  use Honeybadger.Filter.Mixin
+
+  # Supervisors/processes that generate errors during normal shutdown
+  @ignored_registered_names [
+    "memsup",
+    "cpu_sup",
+    "Elixir.PollerSupervisor"
+  ]
+
+  @impl Honeybadger.Filter
+  def filter_context(context) do
+    # Check if this is an os_mon supervisor error
+    registered_name = get_in(context, [:registered_name])
+
+    if registered_name in @ignored_registered_names do
+      # Return nil to filter out this error
+      nil
+    else
+      super(context)
+    end
+  end
+end