Instrument instead methods Gitlab::InsecureKeyFingerprint

CHANGELOG-EE

@@ -2,6 +2,7 @@ Please view this file on the master branch, on stable branches it's out of date.
 
 v 8.9.0 (unreleased)
   - Fix nil user handling in UpdateMirrorService
+  - Instrument instance methods of Gitlab::InsecureKeyFingerprint class
 
 v 8.8.3
   - Add standard web hook headers to Jenkins CI post. !374

config/initializers/metrics.rb

@@ -126,4 +126,8 @@ if Gitlab::Metrics.enabled?
   GC::Profiler.enable
 
   Gitlab::Metrics::Sampler.new.start
+
+  Gitlab::Metrics::Instrumentation.configure do |config|
+    config.instrument_instance_methods(Gitlab::InsecureKeyFingerprint)
+  end
 end