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05-vdc-site-manager-guide.md

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Guide for VDC First Time Setup

Important Setup Requirements

  • Ensure both cluster names are different when created; otherwise, it will create problems.
  • Ensure the Ceph storage name is the SAME on both clusters, and that both are configured for either replication or erasure coding.

Configuration Examples

For Replication

echo "starceph" > /etc/webmin/vdcsitemanager/ceph-storage-name
echo "0" > /etc/webmin/vdcsitemanager/ceph-erasure-code

For Erasure Coding

echo "cephdata" > /etc/webmin/vdcsitemanager/ceph-storage-name
echo "1" > /etc/webmin/vdcsitemanager/ceph-erasure-code

SSH Auto Login Setup

  • Set up one-time SSH auto-login to all Site1 PVE (DC)and Site2 PVE (DR) for automatic login between them and from the VDC VM. This is essential for inter-process communication and to trigger root processes for data synchronization.

Example Command

ssh-copy-id [email protected]
  • Test the SSH connection:
ssh [email protected]

It should log in automatically.

Login Requirements

  • Login from all PVE servers of Site1 Cluster to each server of Site2 Cluster PVE.
  • Login from all PVE servers of Site2 Cluster to each server of Site1 Cluster PVE.
  • Login from VDC VM to each server of Site1 Cluster PVE.
  • Login from VDC VM to each server of Site2 Cluster PVE.

Example Commands

ssh-copy-id root@site1
ssh-copy-id root@site2

Site Configuration for VDC

  1. Navigate to the folder on the VDC VM: 
    cd /usr/local/src/vdcsitemanager-tools/manager-tools/
  2. Create the site configuration for VDC to manage all nodes via Webmin (this is a one-time activity).

For Site1 (any one IP)

php onetime-site-build-for-manager.php 1 192.168.30.113

For Site2 (any one IP)

php onetime-site-build-for-manager.php 2 192.168.40.144

Webmin Login

  • Now, log in to Webmin of VDC (example: 192.168.40.30):