Add example files for using with systemd

Author: jwilhelm-godaddy

README.rst

@@ -94,6 +94,21 @@ For a complete listing of the command-line options available see:
 
     $ celery events --help
 
+If you would like to use ``systemd`` to run the process, there are example
+configuration files available under the ``extra/systemd/`` folder. After placing
+the ``celerycam.conf`` under ``/etc/``, and ``celerycam.service`` under
+ ``/etc/systemd/system/``, you will be able to use the ``systemctl`` command to
+control the daemon. For example:
+
+.. code-block:: console
+
+    $ systemctl start celerycam
+
+.. code-block:: console
+
+    $ systemctl stop celerycam
+
+
 Configuration
 =============
 
@@ -147,4 +162,3 @@ In your Celery configuration simply set them to override the defaults, e.g.::
 .. |pyimp| image:: https://img.shields.io/pypi/implementation/django-celery-monitor.svg
     :alt: Support Python implementations.
     :target: http://pypi.python.org/pypi/django_celery_monitor/
-

extra/systemd/celerycam.conf

@@ -0,0 +1,13 @@
+# Absolute or relative path to the 'celery' command:
+CELERY_BIN="/usr/bin/celery"
+CELERY_APP="proj"
+
+# Where to chdir at start.
+CELERYCAM_CHDIR="/opt/celery"
+
+# Extra arguments to celerycam
+CELERYCAM_OPTS="--camera django_celery_monitor.camera.Camera --frequency=2.0"
+
+CELERYCAM_LOG_FILE="/var/log/celery/celerycam.log"
+CELERYCAM_PID_FILE="/var/run/celery/celery_cam.pid"
+CELERYCAM_LOG_LEVEL="INFO"

extra/systemd/celerycam.service

@@ -0,0 +1,20 @@
+[Unit]
+Description=Celery Camera Service
+After=network.target
+
+[Service]
+Type=simple
+User=celery
+Group=celery
+EnvironmentFile=/etc/sysconfig/celerycam
+WorkingDirectory=/opt/celery
+ExecStart=/bin/sh -c '${CELERY_BIN} events -A ${CELERY_APP} \
+    --workdir=${CELERYCAM_CHDIR} \
+    --pidfile=${CELERYCAM_PID_FILE} \
+    --logfile=${CELERYCAM_LOG_FILE} \
+    --loglevel=${CELERYCAM_LOG_LEVEL} \
+    ${CELERYCAM_OPTS}'
+ExecStop=/bin/systemctl kill celerycam.service
+
+[Install]
+WantedBy=multi-user.target