Rework systemd integration so it does not activate when run in other …

…binaries, like sidekiqswarm or a custom Sidekiq launcher, #4511

Changes.md

@@ -6,6 +6,7 @@ HEAD
 ---------
 
 - Fix: Do not connect to redis at ruby vm exit when not needed. [#4502] 
+- Refactor systemd integration to work better with custom binaries [#4511]
 - Remove Redis connection naming [#4479]
 
 6.0.6

bin/sidekiq

@@ -6,9 +6,28 @@ $TESTING = false
 
 require_relative '../lib/sidekiq/cli'
 
+def integrate_with_systemd
+  return unless ENV["NOTIFY_SOCKET"]
+
+  Sidekiq.configure_server do |config|
+    Sidekiq.logger.info "Enabling systemd notification integration"
+    require "sidekiq/sd_notify"
+    config.on(:startup) do
+      Sidekiq::SdNotify.ready
+    end
+    config.on(:shutdown) do
+      Sidekiq::SdNotify.stopping
+    end
+    Sidekiq.start_watchdog if Sidekiq::SdNotify.watchdog?
+  end
+end
+
 begin
   cli = Sidekiq::CLI.instance
   cli.parse
+
+  integrate_with_systemd
+
   cli.run
 rescue => e
   raise e if $DEBUG

lib/sidekiq/systemd.rb

@@ -16,23 +16,9 @@ def self.start_watchdog
     Sidekiq.logger.info "Pinging systemd watchdog every #{ping_f.round(1)} sec"
     Thread.new do
       loop do
-        Sidekiq::SdNotify.watchdog
         sleep ping_f
+        Sidekiq::SdNotify.watchdog
       end
     end
   end
 end
-
-if ENV["NOTIFY_SOCKET"]
-  Sidekiq.configure_server do |config|
-    Sidekiq.logger.info "Enabling systemd notification integration"
-    require "sidekiq/sd_notify"
-    config.on(:startup) do
-      Sidekiq::SdNotify.ready
-    end
-    config.on(:shutdown) do
-      Sidekiq::SdNotify.stopping
-    end
-    Sidekiq.start_watchdog if Sidekiq::SdNotify.watchdog?
-  end
-end