153 lines
3.2 KiB
Markdown
153 lines
3.2 KiB
Markdown
# Disaster Recovery Procedures
|
|
|
|
## Overview
|
|
|
|
This document outlines procedures for disaster recovery and business continuity for the DBIS Core Lite payment system.
|
|
|
|
## Recovery Objectives
|
|
|
|
- **RTO (Recovery Time Objective)**: 4 hours
|
|
- **RPO (Recovery Point Objective)**: 1 hour (data loss tolerance)
|
|
|
|
## Backup Strategy
|
|
|
|
### Database Backups
|
|
|
|
**Full Backup:**
|
|
- Frequency: Daily at 02:00 UTC
|
|
- Retention: 30 days
|
|
- Location: Secure backup storage
|
|
- Format: Compressed SQL dump
|
|
|
|
**Transaction Log Backups:**
|
|
- Frequency: Every 15 minutes
|
|
- Retention: 7 days
|
|
- Used for point-in-time recovery
|
|
|
|
### Audit Log Backups
|
|
|
|
- Frequency: Daily
|
|
- Retention: 10 years (compliance requirement)
|
|
- Format: CSV export + database dump
|
|
|
|
### Configuration Backups
|
|
|
|
- All configuration files (env, certificates) backed up daily
|
|
- Version controlled in secure repository
|
|
|
|
## Recovery Procedures
|
|
|
|
### Full System Recovery
|
|
|
|
1. **Prerequisites:**
|
|
- Access to backup storage
|
|
- Database server available
|
|
- Application server available
|
|
|
|
2. **Steps:**
|
|
```bash
|
|
# 1. Restore database
|
|
gunzip < backups/dbis_core_YYYYMMDD.sql.gz | psql $DATABASE_URL
|
|
|
|
# 2. Run migrations
|
|
npm run migrate
|
|
|
|
# 3. Restore configuration
|
|
cp backups/.env.production .env
|
|
|
|
# 4. Restore certificates
|
|
cp -r backups/certs/* ./certs/
|
|
|
|
# 5. Start application
|
|
npm start
|
|
```
|
|
|
|
### Point-in-Time Recovery
|
|
|
|
1. Restore full backup to recovery server
|
|
2. Apply transaction logs up to desired point
|
|
3. Verify data integrity
|
|
4. Switch traffic to recovered system
|
|
|
|
### Partial Recovery (Single Table)
|
|
|
|
```sql
|
|
-- Restore specific table
|
|
pg_restore -t payments -d dbis_core backups/dbis_core_YYYYMMDD.dump
|
|
```
|
|
|
|
## Disaster Scenarios
|
|
|
|
### Database Server Failure
|
|
|
|
**Procedure:**
|
|
1. Identify failure (health check, monitoring alerts)
|
|
2. Activate standby database or restore from backup
|
|
3. Update connection strings
|
|
4. Restart application
|
|
5. Verify operations
|
|
|
|
### Application Server Failure
|
|
|
|
**Procedure:**
|
|
1. Deploy application to backup server
|
|
2. Update load balancer configuration
|
|
3. Verify health checks
|
|
4. Monitor for issues
|
|
|
|
### Network Partition
|
|
|
|
**Procedure:**
|
|
1. Identify affected components
|
|
2. Route traffic around partition
|
|
3. Monitor reconciliation for missed transactions
|
|
4. Reconcile when connectivity restored
|
|
|
|
### Data Corruption
|
|
|
|
**Procedure:**
|
|
1. Identify corrupted data
|
|
2. Isolate affected records
|
|
3. Restore from backup
|
|
4. Replay transactions if needed
|
|
5. Verify data integrity
|
|
|
|
## Testing
|
|
|
|
### Disaster Recovery Testing
|
|
|
|
**Schedule:**
|
|
- Full DR test: Quarterly
|
|
- Partial DR test: Monthly
|
|
- Backup restore test: Weekly
|
|
|
|
**Test Scenarios:**
|
|
1. Database server failure
|
|
2. Application server failure
|
|
3. Network partition
|
|
4. Data corruption
|
|
5. Complete site failure
|
|
|
|
## Communication Plan
|
|
|
|
During disaster:
|
|
1. Notify technical team immediately
|
|
2. Activate on-call engineer
|
|
3. Update status page
|
|
4. Communicate with stakeholders
|
|
|
|
## Post-Recovery
|
|
|
|
1. Document incident
|
|
2. Review recovery time and process
|
|
3. Update procedures if needed
|
|
4. Conduct post-mortem
|
|
5. Implement improvements
|
|
|
|
## Contacts
|
|
|
|
- **Primary On-Call**: [Contact]
|
|
- **Secondary On-Call**: [Contact]
|
|
- **Database Team**: [Contact]
|
|
- **Infrastructure Team**: [Contact]
|