failover-dr-to-pvemini.sh and failback-dr-to-pveelite.sh promote/demote
the rpool/oracle-backups dataset between nodes when pveelite is down.
Both refuse to run if the other side is reachable to prevent split-brain.
Both patch transfer_backups.ps1 on Oracle Production (10.0.20.36) via
SSH to redirect the daily SCP target between 10.0.20.202 and 10.0.20.201.
The PowerShell patch uses -EncodedCommand (UTF-16LE base64) so the bash
caller does not need to escape PowerShell quoting. End-to-end test
including failover -> failback confirmed transfer_backups.ps1 returns
to byte-identical state (SHA256 43DD2187...).
pveelite-down-alert.sh runs every minute on pvemini and emails an alert
with copy-paste failover instructions after 5 consecutive ping failures.
The alert body includes the latest oracle-backups and VM 109 replica
timestamps so the operator knows the recovery point before deciding.
The DR weekly-test script gains a cluster-aware guard at the top that
exits silently when /etc/pve/qemu-server/109.conf is not on the local
node, allowing the same cron entry to be present on both pveelite and
pvemini without double-firing.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
