Merge pull request #54 from juzim/add-systemd-info

Added information for creating a system service

Author: niqdev

README.md

@@ -285,6 +285,43 @@ crontab -e
 00 09 * * * cd PATH_TO_PROJECT/packtpub-crawler && /usr/bin/python script/spider.py --config config/prod.cfg >> /tmp/packtpub.log 2>&1
 ```
 
+
+### Systemd service
+Create two files in /etc/systemd/system:
+
+1. packtpub-crawler.service
+```
+[Unit]
+Description=run packtpub-crawler
+
+[Service]
+User=USER_THAT_SHOULD_RUN_THE_SCRIPT
+ExecStart=/usr/bin/python2.7 PATH_TO_PROJECT/packtpub-crawler/script/spider.py -c config/prod.cfg
+
+[Install]
+WantedBy=multi-user.target
+```
+
+2. packtpub-crawler.timer
+```
+[Unit]
+Description=Runs packtpub-crawler every day at 7
+
+[Timer]
+OnBootSec=10min
+OnActiveSec=1s
+OnCalendar=*-*-* 07:00:00
+Unit=packtpub_crawler.service
+Persistent=true
+
+[Install]
+WantedBy=multi-user.target
+```
+
+Enable the script with ```sudo systemctl enable packtpub_crawler.timer```.
+You can test the service with ```sudo systemctl start packtpub_crawler.timer``` and see the output with ```sudo journalctl -u packtpub_crawler.service -f```.
+
+
 ### Newsletter
 The script downloads also the free ebooks from the weekly packtpub newsletter.
 The [URL](https://goo.gl/kUciut) is generated by a Google Apps Script which parses all the mails.