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Chapter 3. Backup and Restore
This chapter outlines the methods to back up, verify, and restore a Satellite system.
Backups should be conducted either nightly or weekly, depending on the amount of data being stored, and how much data you could tolerate losing in the case of a system outage.
It is recommended that database backups are performed during a scheduled maintenance outage for the RHN Satellite, as all services will become unusable for website and client connections during the backup.
3.1. Backups
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Procedure 3.1. Backing up the Embedded Database
- Stop the RHN Satellite server using the
stopcommand:rhn-satellite stop
rhn-satellite stopCopy to Clipboard Copied! Toggle word wrap Toggle overflow - Switch to the Oracle user, and create the backup using the
db-controlutility:su - oracle db-control backup [directory]
su - oracle db-control backup [directory]Copy to Clipboard Copied! Toggle word wrap Toggle overflow Replace directory with the absolute path to the location where you want to store your database backup. The process will take several minutes. - Switch back to the root user, and start the Satellite:
exit rhn-satellite start
exit rhn-satellite startCopy to Clipboard Copied! Toggle word wrap Toggle overflow - Switch to the Oracle user, and use the
examineoption ofdb-controlto check the backup time stamp and to determine if there are any missing files:su - oracle db-control examine [directory]
su - oracle db-control examine [directory]Copy to Clipboard Copied! Toggle word wrap Toggle overflow You can also use theverifyoption ofdb-controlto conduct a thorough review, which includes checking the md5sum of each of the files in the backup:db-control verify [directory]
db-control verify [directory]Copy to Clipboard Copied! Toggle word wrap Toggle overflow If the verification is successful, the contents of directory are safe to be used to restore the database.
Note
Users of external databases should also perform periodic backups. Consult your external database administrator for more information on supported backup procedures.
Backing up System Files
In addition to the database, a number of system files and directories should also be backed up. The files and directories that should be backed up are:
/etc/sysconfig/rhn//etc/rhn//etc/sudoers/etc/tnsnames.ora/var/www/html/pub//var/satellite/redhat/[0-9]*/(This is the location for any custom RPMs)/root/.gnupg//root/ssl-build//etc/dhcpd.conf/etc/httpd//tftpboot//var/lib/cobbler//var/lib/nocpulse//var/lib/rhn/kickstarts//var/www/cobbler/
If possible, back up
/var/satellite/ as well. This is a duplicate of the Red Hat RPM repository, and it will save a large download when recovering from a failure. It can be regenerated with the satellite-sync tool. If you are using a disconnected satellite, /var/satellite/ must be backed up in order to be able to recover from failure.
Backing up only the files and directories listed above would require reinstalling the RHN Satellite Server ISO RPMs and re-registering the satellite in order to recover from a failure. In addition, Red Hat packages would need to be resynchronized using the
satellite-sync tool, and the /root/ssl-build/rhn-org-httpd-ssl-key-pair-MACHINE_NAME-VER-REL.noarch.rpm package would need to be installed. Alternatively, you could reinstall the RHN Satellite without re-registering it. This can be achieved by canceling or skipping the Red Hat Network registration and SSL certificate generation sections.
The most comprehensive backup method is to back up the entire machine. This method saves time in downloading and re-installing, but also requires additional storage and time to perform the backup.
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