1 files changed, 63 insertions, 0 deletions
diff --git a/lib/gitlab/memory/watchdog/configurator.rb b/lib/gitlab/memory/watchdog/configurator.rb
new file mode 100644
index 00000000000..6d6f97dc8ba
--- /dev/null
+++ b/lib/gitlab/memory/watchdog/configurator.rb
@@ -0,0 +1,63 @@
+# frozen_string_literal: true
+
+module Gitlab
+  module Memory
+    class Watchdog
+      class Configurator
+        class << self
+          def configure_for_puma
+            lambda do |config|
+              sleep_time_seconds = ENV.fetch('GITLAB_MEMWD_SLEEP_TIME_SEC', 60).to_i
+              config.logger = Gitlab::AppLogger
+              config.handler = Gitlab::Memory::Watchdog::PumaHandler.new
+              config.sleep_time_seconds = sleep_time_seconds
+              config.monitors(&configure_monitors_for_puma)
+            end
+          end
+
+          def configure_for_sidekiq
+            lambda do |config|
+              sleep_time_seconds = [ENV.fetch('SIDEKIQ_MEMORY_KILLER_CHECK_INTERVAL', 3).to_i, 2].max
+              config.logger = Sidekiq.logger
+              config.handler = Gitlab::Memory::Watchdog::TermProcessHandler.new
+              config.sleep_time_seconds = sleep_time_seconds
+              config.monitors(&configure_monitors_for_sidekiq)
+            end
+          end
+
+          private
+
+          def configure_monitors_for_puma
+            lambda do |stack|
+              max_strikes = ENV.fetch('GITLAB_MEMWD_MAX_STRIKES', 5).to_i
+
+              if Gitlab::Utils.to_boolean(ENV['DISABLE_PUMA_WORKER_KILLER'])
+                max_heap_frag = ENV.fetch('GITLAB_MEMWD_MAX_HEAP_FRAG', 0.5).to_f
+                max_mem_growth = ENV.fetch('GITLAB_MEMWD_MAX_MEM_GROWTH', 3.0).to_f
+
+                # stack.push MonitorClass, args*, max_strikes:, kwargs**, &block
+                stack.push Gitlab::Memory::Watchdog::Monitor::HeapFragmentation,
+                           max_heap_fragmentation: max_heap_frag,
+                           max_strikes: max_strikes
+
+                stack.push Gitlab::Memory::Watchdog::Monitor::UniqueMemoryGrowth,
+                           max_mem_growth: max_mem_growth,
+                           max_strikes: max_strikes
+              else
+                memory_limit = ENV.fetch('PUMA_WORKER_MAX_MEMORY', 1200).to_i
+
+                stack.push Gitlab::Memory::Watchdog::Monitor::RssMemoryLimit,
+                           memory_limit: memory_limit,
+                           max_strikes: max_strikes
+              end
+            end
+          end
+
+          def configure_monitors_for_sidekiq
+            # NOP - At the moment we don't run watchdog for Sidekiq
+          end
+        end
+      end
+    end
+  end
+end