Migrate correlation and tracing code to LabKit

This change is a fairly straightforward refactor to extract the tracing
and correlation-id code from the gitlab rails codebase into the new
LabKit-Ruby project.

The corresponding import into LabKit-Ruby was in
https://gitlab.com/gitlab-org/labkit-ruby/merge_requests/1

The code itself remains very similar for now.

Extracting it allows us to reuse it in other projects, such as
Gitaly-Ruby. This will give us the advantages of correlation-ids and
distributed tracing in that project too.

1 files changed, 3 insertions, 3 deletions

diff --git a/lib/peek/views/tracing.rb b/lib/peek/views/tracing.rb
index 0de32a8fdda..94726a498ea 100644
--- a/lib/peek/views/tracing.rb
+++ b/lib/peek/views/tracing.rb
@@ -4,9 +4,9 @@ module Peek
   module Views
     class Tracing < View
       def results
-        {
-          tracing_url: Gitlab::Tracing.tracing_url
-        }
+        tracing_url = Labkit::Tracing.tracing_url(Gitlab.process_name)
+
+        { tracing_url: tracing_url }
       end
     end
   end