Please help me troubleshoot why Magento2 Cron just won't work

Question

Why we simply cannot get the CRON to run on Magento2 (2.2).

The Crontab is below. The Cron_Schedule database table only ever populates if we trigger the Magento Cron manually from the CL.

* * * * * /RunCloud/Packages/php70rc/bin/php /home/runcloud/webapps/magento cron:run | grep -v "Ran jobs by schedule" >> /home/runcloud/webapps/magento/var/log/magento.cron.log

* * * * * /RunCloud/Packages/php70rc/bin/php /RunCloud/Packages/php70rc/bin/php /home/runcloud/webapps/magento/update/cron.php  >> /home/runcloud/webapps/magento/var/log/update.cron.log

* * * * * /RunCloud/Packages/php70rc/bin/php /RunCloud/Packages/php70rc/bin/php /home/runcloud/webapps/magento setup:cron:run >> /home/runcloud/webapps/magento/var/log/setup.cron.log

* * * * * echo asdf > /home/runcloud/webapps/magento/var/log/test.cron.log

• If we run the cron manually via CL it runs fine so sure it's not a user or file permissions problem.
• The binary path is set exactly as per 'which PHP' output
• The bottom line in the crontab is a test I created which works fine so I know the absolute paths to Magento install are correct.

Answer 1

This turned out to just be an error with the PHP paths. We thought the full path was required as suggested by the RunCloud CRON task builder, but instead it worked with just bin/php for the PHP binary path.