Database Management

When to Use

• Database health checks
• Connection verification
• Performance monitoring
• Backup status verification

Prerequisites

• Azure CLI for Azure databases
• psql for PostgreSQL operations
• Appropriate database credentials

Commands

Azure PostgreSQL

# List PostgreSQL servers
az postgres flexible-server list -o table

# Show server details
az postgres flexible-server show --name <server> --resource-group <rg>

# Check firewall rules
az postgres flexible-server firewall-rule list --name <server> --resource-group <rg>

# Check backup retention
az postgres flexible-server show --name <server> --resource-group <rg> --query "backup"

Connection Testing

# Test PostgreSQL connection
psql "host=<host> dbname=<db> user=<user> sslmode=require" -c "SELECT version();"

# Check active connections
psql -c "SELECT count(*) FROM pg_stat_activity WHERE state = 'active';"

Health Monitoring

# Check database size
psql -c "SELECT pg_size_pretty(pg_database_size(current_database()));"

# Check table sizes
psql -c "SELECT schemaname, tablename, pg_size_pretty(pg_total_relation_size(schemaname||'.'||tablename))
         FROM pg_tables ORDER BY pg_total_relation_size(schemaname||'.'||tablename) DESC LIMIT 10;"

Best Practices

1. Use private endpoints for database connectivity
2. Enable SSL/TLS for all connections
3. Configure automated backups
4. Monitor connection pool usage
5. Set up alerts for high CPU/memory

Output Format

1. Command executed
2. Database status summary
3. Any issues detected
4. Recommendations

Integration with Agents

Used by: @terraform, @sre, @test