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infrastructure/databases/database-backups/SKILL.md

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+---
+name: database-backups
+description: Implement database backup strategies. Configure automated backups, retention, and recovery testing. Use when designing backup and recovery procedures.
+license: MIT
+metadata:
+  author: devops-skills
+  version: "1.0"
+---
+
+# Database Backups
+
+Implement comprehensive database backup strategies.
+
+## Backup Types
+
+```yaml
+backup_types:
+  full:
+    description: Complete database copy
+    frequency: Weekly
+    
+  incremental:
+    description: Changes since last backup
+    frequency: Daily
+    
+  transaction_log:
+    description: Continuous transaction logging
+    frequency: Continuous
+```
+
+## Automated Backup Script
+
+```bash
+#!/bin/bash
+DATE=$(date +%Y%m%d_%H%M%S)
+BACKUP_DIR="/backups"
+
+# PostgreSQL
+pg_dump -Fc mydb > $BACKUP_DIR/pg_$DATE.dump
+
+# MySQL
+mysqldump -u root -p$MYSQL_PWD mydb | gzip > $BACKUP_DIR/mysql_$DATE.sql.gz
+
+# Upload to S3
+aws s3 cp $BACKUP_DIR/pg_$DATE.dump s3://backups/postgres/
+
+# Cleanup old backups (keep 7 days)
+find $BACKUP_DIR -name "*.dump" -mtime +7 -delete
+```
+
+## Recovery Testing
+
+```bash
+# Create test environment
+docker run -d --name restore-test postgres:15
+
+# Restore backup
+pg_restore -d testdb backup.dump
+
+# Verify data integrity
+psql testdb -c "SELECT COUNT(*) FROM users;"
+```
+
+## Best Practices
+
+- 3-2-1 Rule: 3 copies, 2 media types, 1 offsite
+- Regular recovery testing
+- Encrypt backups at rest
+- Monitor backup success
+- Document recovery procedures