Disaster Recovery Procedure For Primary Server

The primary objective of the disaster recovery procedure is to ensure stability and orderly recovery after a failed primary server to enable minimal disruption in the use of Dispatcher Paragon Cloud.

The following outlines the steps to backup and restore a Dispatcher Paragon Cloud primary server.

Backup a primary server

1. To take a backup of all the runtime configurations, truststore, log4j config files and the license

Go to the folder /opt/DispatcherParagon

CODE

cd /opt/DispatcherParagon

Take a backup of the conf folder

CODE

tar -cvzf conf.tar.gz conf

where conf.tar.gz – name of the backup
conf – name of the folder that is backed up

2. To take a backup of the runtime information, server-ids and the local database
Go to the folder /var/lib

CODE

cd /var/lib

Take a backup of the eopng folder

CODE

tar -cvzf eopng.tar.gz eopng

3. If you are using an external postgres DB then take a backup of the database as well

CODE

pg_dump -f primarydbdump -b -c -C -h <DBHOST> -U postgres -p <DBPORT> eopng_config

Where DBHOST and DBPORT are the database cluster address and port number.

Restore a primary server

In case the server fails, the below steps can be taken on a clean system

4. Run the Dispatcher Paragon Cloud installer

CODE

./safeq-cloud-server-*-release-setup-linux-x86_64.bin [-f]

The optional -f switch can be specified to force the full installation instead of upgrade.

5. Fill out all the details in the installer (All the details in the installer will only be used to get through the wizard and setup all the binaries we do not need to backup)
6. Opt out of starting Dispatcher Paragon Cloud in the final installer step (uncheck the “Start Dispatcher Paragon Cloud server” checkbox). Or stop it afterwards with systemctl stop safeq-cloud-server command.
7. Stop the database (only if bundled postgresql was used and not the external database)

CODE

systemctl stop Dispatcher Paragon Cloud-database

8. Replace the new /opt/DispatcherParagon/conf with the backup taken in step 1

CODE

cd /opt/DispatcherParagon
tar -xvzfp /path/to/backedup/conf.tar.gz

9. Replace the new /var/lib/eopng with the backup taken in steps 2

CODE

cd var/lib
tar -xvzfp /path/to/backedup/eopng.tar.gz

10. Start the database (only if bundled postgresql was used and not the external database)

CODE

systemctl start Dispatcher Paragon Cloud-database

10. Start the Dispatcher Paragon Cloud services again

CODE

systemctl start safeq-cloud-server

While restoring the folders please make sure that the permissions on the folders backed up are retained