HOWTO: Validate DNS Cutover During a DR Failover¶
DNS cutover is the moment a DR failover becomes visible to applications. Getting it right — and proving you did — requires structured validation, not just a single dig. This HOWTO covers the HybridOps DNS cutover validation sequence: confirming pre-cutover TTLs, executing the record change via the PowerDNS API, measuring propagation across all resolver paths, verifying application reconnection using probe output, and capturing the full cutover timeline of the run record in the DR drill run record.
What this covers:
- Pre-cutover TTL confirmation and the propagation timing window it creates
- PowerDNS API record update execution and propagation measurement across resolver paths
- Application reconnection verification via structured probe output and DR drill run-record capture