Script in cron.hourly does not run

I have the following file in /etc/cron.hourly. The purpose of this script is to create a docker-MongoDB dump backup every hour and then use rclone to synchronize this dump file with the contents in a Google Drive folder.

Name of Script:

rclone_Linux_MongoDB_Sync

Script:

#!/bin/sh

/usr/bin/docker exec -it mongodb mkdir /data/dump
/usr/bin/docker exec -it mongodb mongodump --db myDB -u theUser -p thePassword --gzip --out /data/dump/

# RClone Config file
RCLONE_CONFIG=/home/ubuntu/.config/rclone/rclone.conf
export RCLONE_CONFIG
#if [[ "`pidof -x $(basename $0) -o %PPID`" ]]; then exit; fi

/usr/bin/rclone sync /data/dump/myDB/MongoDB_Backup:MongoDB_Current

I have done:

sudo chmod +x /etc/cron.hourly/rclone_Linux_MongoDB_Sync
sudo chmod 777 /etc/cron.hourly/rclone_Linux_MongoDB_Sync

Notice how I do not have the .sh extension for the script. Previously, this was my issue. Now, when I run the following, my script does display.

run-parts --test /etc/cron.hourly

My script also runs correctly when I do:

./rclone_Linux_MongoDB_Sync

It also runs when I do:

run-parts /etc/cron.hourly

I have checked /etc/crontab with:

cat /etc/crontab

Part of the result is the following. To my understanding, this is correct.

17 *    * * *   root    cd / && run-parts --report /etc/cron.hourly
25 6    * * *   root    test -x /usr/sbin/anacron || ( cd / && run-parts --report /etc/cron.daily )
47 6    * * 7   root    test -x /usr/sbin/anacron || ( cd / && run-parts --report /etc/cron.weekly )
52 6    1 * *   root    test -x /usr/sbin/anacron || ( cd / && run-parts --report /etc/cron.monthly )
#

I evaluated the logs for cron with the following:

 grep CRON /var/log/syslog

For the daily, weekly, and monthly, I believe they previously were not working due to anacron not being installed. I installed anacron with:

sudo apt-get install anacron

cron.hourly runs at the 17 minute mark of the hour, as indicated by /etc/crontab. Corresponding to this, I see the following repeated each time, with a 17 timestamp.

Jul 19 17:17:01 vps-fac5a33c CRON[1039453]: (root) CMD (   cd / && run-parts --report /etc/cron.hourly)
Jul 19 17:17:09 vps-fac5a33c CRON[1039452]: (root) MAIL (mailed 104 bytes of output but got status 0x004b from MTA#012)
Jul 19 18:17:01 vps-fac5a33c CRON[1045250]: (root) CMD (   cd / && run-parts --report /etc/cron.hourly)
Jul 19 18:17:18 vps-fac5a33c CRON[1045249]: (root) MAIL (mailed 104 bytes of output but got status 0x004b from MTA#012)
Jul 19 19:17:01 vps-fac5a33c CRON[1051174]: (root) CMD (   cd / && run-parts --report /etc/cron.hourly)
Jul 19 19:17:21 vps-fac5a33c CRON[1051173]: (root) MAIL (mailed 104 bytes of output but got status 0x004b from MTA#012)

Perhaps there are some things that I have done that I have forgotten about and not listed here. Nevertheless, I don't understand why this is not working. I have evaluated many different forum posts, tried their process, but doesn't work for me.

Why is my script not running every hour when it is placed in /etc/cron.hourly?

It does not run on its own. It should run every hour.

As an additional note, my script previously had:

#!/bin/bash

However, based on some posts, I changed it to:

#!/bin/sh

When I run shellcheck on my script, nothing is displayed, indicating that it is fine according to shellcheck and is syntactically correct:

shellcheck rclone_Linux_MongoDB_Sync

Added the following to the top of the script after #!/bin/sh. This is to see what errors are occurring within the script during execution.

exec 1>>/tmp/rclone_Linux_MongoDB_Sync.log 2>&1

I changed the crontab for .hourly to a recent time to not have to wait until the 17 minute mark for it to run. Due to the above addition to my script file, the following file was created:

/tmp/rclone_Linux_MongoDB_Sync.log

After running:

 cat /tmp/rclone_Linux_MongoDB_Sync.log

The following was displayed.

the input device is not a TTY
the input device is not a TTY

Thanks everyone!

Okay, so it appears this is an issue with Docker. When issuing commands in Docker through cron, instead of -it only use -i. I have now changed my Docker commands accordingly.

Changed script:

#!/bin/sh
exec 1>>/tmp/rclone_Linux_MongoDB_Sync.log 2>&1
/usr/bin/docker exec -i mongodb mkdir /data/dump
/usr/bin/docker exec -i mongodb mongodump --db myDB -u theUser -p thePassword --gzip --out /data/dump/

# RClone Config file
RCLONE_CONFIG=/home/ubuntu/.config/rclone/rclone.conf
export RCLONE_CONFIG
#if [[ "`pidof -x $(basename $0) -o %PPID`" ]]; then exit; fi

/usr/bin/rclone sync /data/dump/myDB/MongoDB_Backup:MongoDB_Current

Now, the script is able to run as intended, and runs automatically each hour. The fix was changing the -it in the Docker commands to just -i.