My goal is to regularly pack the most important files on a server into a tar.gz file. In order to automate this I am using a cronjob to execute a script:
$ crontab -l
# blablabla
* * * * * /home/backup/run_backup.sh >> /home/backup/output.txt
For debugging reasons, I am currently running the job every minute.
As far as I can judge, it is not a cron problem, since the job executes every minute and runs as root (whoami in the script prints root).
The script that is running looks as follows:
#!/bin/sh -l
echo "Starting ..."
DATE=`date '+%Y-%m-%d_%H-%M-%S'`
BACKUP_PATH="backups/$DATE.tar.gz"
# MAKE BACKUP OF ENTIRE DATABASE
echo "Backing up database ..."
DATABASE_BACKUP_PATH="/home/backup/mysql.sql"
docker exec central-mysql sh -c 'exec mysqldump --all-databases -uroot -p"xxx"' > "$DATABASE_BACKUP_PATH"
# MAKE ARCHIVE
echo "Creating tar archive ..."
tar -vczf "$BACKUP_PATH" \
/home/database/docker-compose.yml \
/home/docker_res_usage.sh \
/home/gitlab/docker-compose.yml \
/home/gitlab/data/git-data/repositories \
/home/mailserver/docker-compose.yml \
/home/mailserver/mail/dkim \
/home/mailserver/rainloop/_data_/_default_/configs/application.ini \
/home/mailserver/rainloop/_data_/_default_/domains \
/home/mailserver/readme.md \
/home/php7-apache-alpine \
/home/sftp \
/home/traefik \
/home/websites \
"$DATABASE_BACKUP_PATH"
# CLEAN-UP
echo "Cleaning up ..."
rm "$DATABASE_BACKUP_PATH"
The docker command runs without problem, creating a .sql file. However, the tar command starts to list the first few files, and then just stops somehow. output.txt looks like this:
Cleaning up ...
Starting ...
Backing up database ...
Creating tar archive ...
/home/database/docker-compose.yml
/home/docker_res_usage.sh
/home/gitlab/docker-compose.yml
/home/gitlab/data/git-data/repositories/
/home/gitlab/data/git-data/repositories/websites/
/home/gitlab/data/git-data/repositories/websites/sbpp.git/
/home/gitlab/data/git-data/repositories/websites/sbpp.git/config
/home/gitlab/data/git-data/repositories/websites/sbpp.git/HEAD
/home/gitlab/data/git-data/repositories/websites/sbpp.git/hooks
/home/gitlab/data/git-data/repositories/websites/sbpp.git/info/
/home/gitlab/data/git-data/repositories/websites/sbpp.git/info/exclude
Cleaning up ...
Question: Are there known reasons for tar to just stop compressing? Do you see errors in my script?
The strange thing about it is that when I run the script manually, it works just fine. Is it a cronjob thing after all? Do I have permission problems, even though I am running as root?
