# High Availability
High availability patterns for bindcar and BIND9 deployments.
## Overview
This section covers strategies for deploying bindcar and BIND9 in highly available configurations.
## Primary-Secondary Architecture
Deploy multiple BIND9 instances with zone transfers:
- Primary server with bindcar for zone management
- Secondary servers for redundancy and geographic distribution
- Automatic zone transfers (AXFR/IXFR)
## Load Balancing
Distribute DNS queries across multiple BIND9 instances:
- Round-robin DNS
- Geographic load balancing
- Health-checked backends
## Kubernetes Deployments
- StatefulSets for stable network identities
- ReadinessProbes for traffic management
- PodDisruptionBudgets for maintenance
## Future Enhancements
Detailed HA patterns and configurations coming soon.
## Next Steps
- [Deployment](../operations/deployment.md) - Deployment patterns
- [Kubernetes](../operations/kubernetes.md) - Kubernetes deployment