From dcfaf49550866a291c316f2901e4274d587e7d37 Mon Sep 17 00:00:00 2001
From: Aleksei Lipniagov <alipniagov@gitlab.com>
Date: Mon, 19 Aug 2019 12:52:07 +0000
Subject: Clean Sidekiq metrics from multiproc dir on start

After moving the multiproc dir cleanup into `config.ru`:`warmup`, we
stopped cleaning Sidekiq metrics dir which is not correct.
This MR intended to fix that. More details:
https://gitlab.com/gitlab-org/gitlab-ce/merge_requests/31668
---
 lib/prometheus/cleanup_multiproc_dir_service.rb | 23 +++++++++++++++++++++++
 1 file changed, 23 insertions(+)
 create mode 100644 lib/prometheus/cleanup_multiproc_dir_service.rb

(limited to 'lib/prometheus/cleanup_multiproc_dir_service.rb')

diff --git a/lib/prometheus/cleanup_multiproc_dir_service.rb b/lib/prometheus/cleanup_multiproc_dir_service.rb
new file mode 100644
index 00000000000..6418b4de166
--- /dev/null
+++ b/lib/prometheus/cleanup_multiproc_dir_service.rb
@@ -0,0 +1,23 @@
+# frozen_string_literal: true
+
+module Prometheus
+  class CleanupMultiprocDirService
+    include Gitlab::Utils::StrongMemoize
+
+    def execute
+      FileUtils.rm_rf(old_metrics) if old_metrics
+    end
+
+    private
+
+    def old_metrics
+      strong_memoize(:old_metrics) do
+        Dir[File.join(multiprocess_files_dir, '*.db')] if multiprocess_files_dir
+      end
+    end
+
+    def multiprocess_files_dir
+      ::Prometheus::Client.configuration.multiprocess_files_dir
+    end
+  end
+end
-- 
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