Freshen up

examples/systemd/sidekiq.service

@@ -1,18 +1,15 @@
 #
-# systemd unit file for CentOS 7, Ubuntu 15.04
+# systemd unit file for CentOS 7+, Ubuntu 15.04+
 #
 # Customize this file based on your bundler location, app directory, etc.
 # Put this in /usr/lib/systemd/system (CentOS) or /lib/systemd/system (Ubuntu).
 # Run:
 #   - systemctl enable sidekiq
-#   - systemctl {start,stop,restart} sidekiq
+#   - systemctl {start,stop,restart,reload} sidekiq
 #
 # This file corresponds to a single Sidekiq process.  Add multiple copies
 # to run multiple processes (sidekiq-1, sidekiq-2, etc).
 #
-# See Inspeqtor's Systemd wiki page for more detail about Systemd:
-# https://github.com/mperham/inspeqtor/wiki/Systemd
-#
 [Unit]
 Description=sidekiq
 # start us only once the network and logging subsystems are available,
@@ -20,8 +17,13 @@ Description=sidekiq
 After=syslog.target network.target
 
 # See these pages for lots of options:
-# http://0pointer.de/public/systemd-man/systemd.service.html
-# http://0pointer.de/public/systemd-man/systemd.exec.html
+#
+#   https://www.freedesktop.org/software/systemd/man/systemd.service.html
+#   https://www.freedesktop.org/software/systemd/man/systemd.exec.html
+#
+# THOSE PAGES ARE CRITICAL FOR ANY LINUX DEVOPS WORK; read them multiple
+# times! systemd is a critical tool for all developers to know and understand.
+#
 [Service]
 Type=simple
 WorkingDirectory=/opt/myapp/current
@@ -29,6 +31,11 @@ WorkingDirectory=/opt/myapp/current
 # ExecStart=/bin/bash -lc '/home/deploy/.rbenv/shims/bundle exec sidekiq -e production'
 # If you use the system's ruby:
 ExecStart=/usr/local/bin/bundle exec sidekiq -e production
+
+# use `systemctl reload sidekiq` to send the quiet signal to Sidekiq
+# at the start of your deploy process.
+ExecReload=/usr/bin/kill -TSTP $MAINPID
+
 User=deploy
 Group=deploy
 UMask=0002