Migration, backups and restores

Table of Contents

Backup
Restore
Migration

It is advised to backup frequently your Rudder installation in case of a major outage.

These procedures will explain how to backup your Rudder installation.

Backup

This backup procedure will operate on the three principal Rudder data sources:

  • The LDAP database
  • The PostgreSQL database
  • The configuration-repository folder

It will also backup the application logs.

How to backup a Rudder installation. 

# First, backup the LDAP database:
/opt/rudder/sbin/slapcat -l /tmp/rudder-backup-$(date +%Y%m%d).ldif

# Second, the PostgreSQL database:
sudo -u postgres pg_dump rudder > /tmp/rudder-backup-$(date +%Y%m%d).sql

# Or without sudo, use the rudder application password:
pg_dump -U rudder rudder > /tmp/rudder-backup-$(date +%Y%m%d).sql

# Third, backup the configuration repository:
tar -C /var/rudder -zvcf /tmp/rudder-backup-$(date +%Y%m%d).tar.gz configuration-repository/ cfengine-community/ppkeys/

# Finally, backup the logs:
tar -C /var/log -zvcf /tmp/rudder-log-backup-$(date +%Y%m%d).tar.gz rudder/

# And put the backups wherever you want, here /root:
cp /tmp/rudder-backup* /root
cp /tmp/rudder-log-backup* /root

Restore

Of course, after a total machine crash, you will have your backups at hand, but what should you do with it ?

Here is the restoration procedure:

How to restore a Rudder backup. 

# First, follow the standard installation procedure, this one assumes you have a working "blank"
# Rudder on the machine

# Disable Rudder agent
rudder agent disable

# Stop Rudder services
service rudder stop

# Drop the OpenLDAP database
rm -rf /var/rudder/ldap/openldap-data/*.mdb

# Import your backups

# Configuration repository
tar -C /var/rudder -zvxf /root/rudder-backup-XXXXXXXX.tar.gz

# LDAP backup
/opt/rudder/sbin/slapadd -l /root/rudder-backup-XXXXXXXX.ldif

# PostgreSQL backup
sudo -u postgres psql -d rudder < /root/rudder-backup-XXXXXXXX.sql
# or
psql -u rudder -d rudder -W < /root/rudder-backup-XXXXXXXX.sql

# Enable Rudder agent
rudder agent enable

# And restart the machine or just Rudder:
service rudder restart

Migration

To migrate a Rudder installation, just backup and restore your Rudder installation from one machine to another.

Please remember that The CFEngine key restoration is mandatory for the clients to update properly, but if the Rudder server address changes, the agents will block. You have to delete every root-*.pub key in /var/rudder/cfengine-community/ppkeys/ for things to work again.