System Maintenance

This guide covers essential maintenance tasks for keeping the MAESTRE platform running smoothly, including backups, updates, and performance monitoring.

Regular Maintenance Tasks

Daily Checks

Perform these checks daily to ensure system health:

1. Log Review: Check system logs for errors or warnings

   # View recent application logs
   tail -n 100 /var/log/maestre/application.log
   
   # View recent error logs
   tail -n 100 /var/log/maestre/error.log

2. Disk Space: Monitor available disk space

   df -h

3. Service Status: Verify all services are running

   # Check backend service
   systemctl status gunicorn
   
   # Check frontend service
   systemctl status nginx
   
   # Check database service
   systemctl status postgresql

Weekly Tasks

1. Full Backup: Perform a complete system backup
2. Performance Review: Check system performance metrics
3. Temporary File Cleanup: Remove unnecessary temporary files

Monthly Tasks

1. Security Updates: Apply security patches and updates
2. User Audit: Review user accounts and permissions
3. Database Optimization: Perform database maintenance operations

Backup and Recovery

Backup Strategy

Implement a comprehensive backup strategy that includes:

1. Database Backups: Regular PostgreSQL database dumps
2. File Backups: Backup of uploaded files and documents
3. Configuration Backups: Backup of system configuration files

Database Backup

# Create a database backup
pg_dump -U maestre_user -d maestre -F c -f /path/to/backups/maestre_db_$(date +%Y%m%d).dump

# Automate with a cron job (daily at 2 AM)
# Add to crontab:
# 0 2 * * * pg_dump -U maestre_user -d maestre -F c -f /path/to/backups/maestre_db_$(date +%Y%m%d).dump

File Backup

# Backup uploaded files
rsync -av /path/to/maestre/backend/media/ /path/to/backups/media/

# Backup configuration files
rsync -av /path/to/maestre/backend/settings.py /path/to/backups/config/settings.py
rsync -av /path/to/maestre/requirements.txt /path/to/backups/config/requirements.txt
rsync -av /path/to/maestre/frontend/next.config.js /path/to/backups/config/next.config.js

Backup Rotation

Implement a backup rotation strategy to manage storage efficiently:

1. Keep daily backups for 7 days
2. Keep weekly backups for 4 weeks
3. Keep monthly backups for 12 months

# Example script for backup rotation
find /path/to/backups/daily/ -name "*.dump" -type f -mtime +7 -delete
find /path/to/backups/weekly/ -name "*.dump" -type f -mtime +30 -delete
find /path/to/backups/monthly/ -name "*.dump" -type f -mtime +365 -delete

System Updates

Backend Updates

# Navigate to the backend directory
cd /path/to/maestre/backend

# Activate virtual environment
source ../venv/bin/activate

# Pull latest changes
git pull

# Install updated dependencies
pip install -r requirements.txt

# Apply migrations
python manage.py migrate

# Collect static files
python manage.py collectstatic --noinput

# Restart the service
systemctl restart gunicorn

Frontend Updates

# Navigate to the frontend directory
cd /path/to/maestre/frontend

# Pull latest changes
git pull

# Install updated dependencies
npm install

# Build the application
npm run build

# Restart the service
systemctl restart nginx

Database Schema Updates

When database schema changes are part of an update:

# Create a backup before applying migrations
pg_dump -U maestre_user -d maestre -F c -f /path/to/backups/pre_migration_$(date +%Y%m%d).dump

# Apply migrations
python manage.py migrate

Performance Monitoring

Key Metrics to Monitor

1. CPU Usage: Monitor CPU utilization
2. Memory Usage: Track memory consumption
3. Disk I/O: Monitor disk read/write operations
4. Database Performance: Track query execution times
5. Response Times: Monitor API and page load times

Monitoring Tools

System Monitoring

# Real-time system monitoring
top

# Advanced system monitoring
htop

# Disk I/O monitoring
iotop

Application Monitoring

Consider implementing application performance monitoring (APM) tools such as:

1. Prometheus: For metrics collection
2. Grafana: For visualization and dashboards
3. ELK Stack: For log aggregation and analysis

Performance Optimization

Database Optimization

# Analyze database tables
psql -U maestre_user -d maestre -c "VACUUM ANALYZE;"

# Rebuild indexes
psql -U maestre_user -d maestre -c "REINDEX DATABASE maestre;"

Caching

Implement and maintain caching mechanisms:

1. Redis Cache: Configure and monitor Redis for caching
2. Static File Caching: Set appropriate cache headers for static files
3. Query Caching: Optimize database queries with caching

Troubleshooting Common Issues

Service Failures

Issue	Possible Causes	Solutions
Backend service not starting	Configuration error, dependency issue	Check logs, verify dependencies, check configuration
Frontend service not starting	Build error, Node.js issue	Check build logs, verify Node.js version
Database connection failure	PostgreSQL service down, credential issue	Check PostgreSQL status, verify credentials

Performance Issues

Issue	Possible Causes	Solutions
Slow page loads	Database queries, server resources	Optimize queries, increase server resources
High memory usage	Memory leaks, insufficient resources	Identify memory-intensive processes, increase RAM
Database slowdown	Missing indexes, query optimization	Add indexes, optimize queries, increase cache

Log Analysis

When troubleshooting, focus on these key log files:

# Database logs
tail -n 100 /var/log/postgresql/postgresql.log

# Web server logs (Nginx)
tail -n 100 /var/log/nginx/access.log
tail -n 100 /var/log/nginx/error.log

Scaling the System

Vertical Scaling

Increase resources on existing servers:

1. Add more CPU cores
2. Increase RAM
3. Upgrade to faster storage (SSD)

Horizontal Scaling

Add more servers to distribute the load:

1. Implement load balancing across multiple application servers
2. Set up database replication or clustering
3. Distribute file storage across multiple servers

Cloud Scaling

If hosting in a cloud environment, consider:

1. Auto-scaling groups based on load
2. Managed database services
3. Content delivery networks (CDNs) for static content

Maintenance Checklist

Use this checklist for regular maintenance sessions:

• Review system logs for errors
• Check disk space usage
• Verify all services are running
• Confirm recent backups completed successfully
• Check database performance
• Review user activity for unusual patterns
• Apply pending security updates
• Test system recovery procedures
• Update documentation with any changes