# Calejo Control Adapter - Operations & Maintenance Guide

## Overview

This guide provides comprehensive procedures for daily operations, monitoring, troubleshooting, and maintenance of the Calejo Control Adapter system.

## Daily Operations

### System Startup and Shutdown

#### Normal Startup Procedure

```bash
# Start all services
docker-compose up -d

# Verify services are running
docker-compose ps

# Check health status
curl http://localhost:8080/api/v1/health
```

#### Graceful Shutdown Procedure

```bash
# Stop services gracefully
docker-compose down

# Verify all services stopped
docker-compose ps
```

#### Emergency Shutdown

```bash
# Immediate shutdown (use only in emergencies)
docker-compose down --timeout 0
```

### Daily Health Checks

#### Automated Health Monitoring

```bash
# Run automated health check
./scripts/health-check.sh

# Check specific components
curl http://localhost:8080/api/v1/health/detailed
```

#### Manual Health Verification

```python
# Check database connectivity
psql "${DATABASE_URL}" -c "SELECT 1;"

# Check protocol servers
opcua-client connect opc.tcp://localhost:4840
modbus-tcp read 127.0.0.1 502 40001 10
curl http://localhost:8080/api/v1/status
```

### Performance Monitoring

#### Key Performance Indicators

| Metric | Target | Alert Threshold |
|--------|--------|-----------------|
| **Response Time** | < 100ms | > 500ms |
| **CPU Usage** | < 70% | > 90% |
| **Memory Usage** | < 80% | > 95% |
| **Database Connections** | < 50% of max | > 80% of max |
| **Network Latency** | < 10ms | > 50ms |

#### Performance Monitoring Commands

```bash
# Monitor system resources
docker stats

# Check application performance
curl http://localhost:8080/api/v1/metrics

# Monitor database performance
psql "${DATABASE_URL}" -c "SELECT * FROM pg_stat_activity;"
```

## Monitoring & Alerting

### Real-time Monitoring

#### Application Monitoring

```bash
# View application logs in real-time
docker-compose logs -f control-adapter

# Monitor specific components
docker-compose logs -f control-adapter | grep -E "(ERROR|WARNING|CRITICAL)"

# Check service status
systemctl status calejo-control-adapter
```

#### Database Monitoring

```bash
# Monitor database performance
psql "${DATABASE_URL}" -c "SELECT * FROM pg_stat_database WHERE datname='calejo';"

# Check connection pool
psql "${DATABASE_URL}" -c "SELECT count(*) FROM pg_stat_activity WHERE datname='calejo';"
```

### Alert Configuration

#### Email Alerts

```yaml
# Email alert configuration
alerts:
  email:
    enabled: true
    smtp_server: smtp.example.com
    smtp_port: 587
    from_address: alerts@calejo.com
    to_addresses:
      - operations@calejo.com
      - engineering@calejo.com
```

#### SMS Alerts

```yaml
# SMS alert configuration
alerts:
  sms:
    enabled: true
    provider: twilio
    account_sid: ${TWILIO_ACCOUNT_SID}
    auth_token: ${TWILIO_AUTH_TOKEN}
    from_number: +1234567890
    to_numbers:
      - +1234567891
      - +1234567892
```

#### Webhook Alerts

```yaml
# Webhook alert configuration
alerts:
  webhook:
    enabled: true
    url: https://monitoring.example.com/webhook
    secret: ${WEBHOOK_SECRET}
```

### Alert Severity Levels

| Severity | Description | Response Time | Notification Channels |
|----------|-------------|---------------|----------------------|
| **Critical** | System failure, safety violation | Immediate (< 15 min) | SMS, Email, Webhook |
| **High** | Performance degradation, security event | Urgent (< 1 hour) | Email, Webhook |
| **Medium** | Configuration issues, warnings | Standard (< 4 hours) | Email |
| **Low** | Informational events | Routine (< 24 hours) | Dashboard only |

## Maintenance Procedures

### Regular Maintenance Tasks

#### Daily Tasks

```bash
# Check system health
./scripts/health-check.sh

# Review error logs
docker-compose logs control-adapter --since "24h" | grep ERROR

# Verify backups
ls -la /var/backup/calejo/
```

#### Weekly Tasks

```bash
# Database maintenance
psql "${DATABASE_URL}" -c "VACUUM ANALYZE;"

# Log rotation
find /var/log/calejo -name "*.log" -mtime +7 -delete

# Backup verification
./scripts/verify-backup.sh latest-backup.tar.gz
```

#### Monthly Tasks

```bash
# Security updates
docker-compose pull
docker-compose build --no-cache

# Performance analysis
./scripts/performance-analysis.sh

# Compliance audit
./scripts/compliance-audit.sh
```

### Backup and Recovery

#### Automated Backups

```bash
# Create full backup
./scripts/backup-full.sh

# Create configuration-only backup
./scripts/backup-config.sh

# Create database-only backup
./scripts/backup-database.sh
```

#### Backup Schedule

| Backup Type | Frequency | Retention | Location |
|-------------|-----------|-----------|----------|
| **Full System** | Daily | 7 days | /var/backup/calejo/ |
| **Database** | Hourly | 24 hours | /var/backup/calejo/database/ |
| **Configuration** | Weekly | 4 weeks | /var/backup/calejo/config/ |

#### Recovery Procedures

```bash
# Full system recovery
./scripts/restore-full.sh /var/backup/calejo/calejo-backup-20231026.tar.gz

# Database recovery
./scripts/restore-database.sh /var/backup/calejo/database/backup.sql

# Configuration recovery
./scripts/restore-config.sh /var/backup/calejo/config/config-backup.tar.gz
```

### Software Updates

#### Update Procedure

```bash
# 1. Create backup
./scripts/backup-full.sh

# 2. Stop services
docker-compose down

# 3. Update application
git pull origin main

# 4. Rebuild services
docker-compose build --no-cache

# 5. Start services
docker-compose up -d

# 6. Verify update
./scripts/health-check.sh
```

#### Rollback Procedure

```bash
# 1. Stop services
docker-compose down

# 2. Restore from backup
./scripts/restore-full.sh /var/backup/calejo/calejo-backup-pre-update.tar.gz

# 3. Start services
docker-compose up -d

# 4. Verify rollback
./scripts/health-check.sh
```

## Troubleshooting

### Common Issues and Solutions

#### Database Connection Issues

**Symptoms**:
- "Connection refused" errors
- Slow response times
- Connection pool exhaustion

**Solutions**:
```bash
# Check PostgreSQL status
systemctl status postgresql

# Verify connection parameters
psql "${DATABASE_URL}" -c "SELECT version();"

# Check connection pool
psql "${DATABASE_URL}" -c "SELECT count(*) FROM pg_stat_activity;"
```

#### Protocol Server Issues

**OPC UA Server Problems**:
```bash
# Test OPC UA connectivity
opcua-client connect opc.tcp://localhost:4840

# Check OPC UA logs
docker-compose logs control-adapter | grep opcua

# Verify certificate validity
openssl x509 -in /app/certs/server.pem -text -noout
```

**Modbus TCP Issues**:
```bash
# Test Modbus connectivity
modbus-tcp read 127.0.0.1 502 40001 10

# Check Modbus logs
docker-compose logs control-adapter | grep modbus

# Verify port availability
netstat -tulpn | grep :502
```

#### Performance Issues

**High CPU Usage**:
```bash
# Identify resource usage
docker stats

# Check for runaway processes
ps aux | grep python

# Analyze database queries
psql "${DATABASE_URL}" -c "SELECT query, calls, total_time FROM pg_stat_statements ORDER BY total_time DESC LIMIT 10;"
```

**Memory Issues**:
```bash
# Check memory usage
free -h

# Monitor application memory
docker stats control-adapter

# Check for memory leaks
journalctl -u docker --since "1 hour ago" | grep -i memory
```

### Diagnostic Tools

#### Log Analysis

```bash
# View recent errors
docker-compose logs control-adapter --since "1h" | grep -E "(ERROR|CRITICAL)"

# Search for specific patterns
docker-compose logs control-adapter | grep -i "connection"

# Export logs for analysis
docker-compose logs control-adapter > application-logs-$(date +%Y%m%d).log
```

#### Performance Analysis

```bash
# Run performance tests
./scripts/performance-test.sh

# Generate performance report
./scripts/performance-report.sh

# Monitor real-time performance
./scripts/monitor-performance.sh
```

#### Security Analysis

```bash
# Run security scan
./scripts/security-scan.sh

# Check compliance status
./scripts/compliance-check.sh

# Audit user activity
./scripts/audit-report.sh
```

## Security Operations

### Access Control

#### User Management

```bash
# List current users
curl -H "Authorization: Bearer ${TOKEN}" http://localhost:8080/api/v1/users

# Create new user
curl -X POST -H "Authorization: Bearer ${TOKEN}" -H "Content-Type: application/json" \
  -d '{"username":"newuser","role":"operator","email":"user@example.com"}' \
  http://localhost:8080/api/v1/users

# Deactivate user
curl -X DELETE -H "Authorization: Bearer ${TOKEN}" \
  http://localhost:8080/api/v1/users/user123
```

#### Role Management

```bash
# View role permissions
curl -H "Authorization: Bearer ${TOKEN}" http://localhost:8080/api/v1/roles

# Update role permissions
curl -X PUT -H "Authorization: Bearer ${TOKEN}" -H "Content-Type: application/json" \
  -d '{"permissions":["read_pump_status","emergency_stop"]}' \
  http://localhost:8080/api/v1/roles/operator
```

### Security Monitoring

#### Audit Log Review

```bash
# View recent security events
psql "${DATABASE_URL}" -c "SELECT * FROM compliance_audit_log WHERE severity IN ('HIGH','CRITICAL') ORDER BY timestamp DESC LIMIT 10;"

# Generate security report
./scripts/security-report.sh

# Monitor failed login attempts
psql "${DATABASE_URL}" -c "SELECT COUNT(*) FROM compliance_audit_log WHERE event_type='INVALID_AUTHENTICATION' AND timestamp > NOW() - INTERVAL '1 hour';"
```

#### Certificate Management

```bash
# Check certificate expiration
openssl x509 -in /app/certs/server.pem -enddate -noout

# Rotate certificates
./scripts/rotate-certificates.sh

# Verify certificate chain
openssl verify -CAfile /app/certs/ca.crt /app/certs/server.pem
```

## Compliance Operations

### Regulatory Compliance

#### IEC 62443 Compliance

```bash
# Generate compliance report
./scripts/iec62443-report.sh

# Verify security controls
./scripts/security-controls-check.sh

# Audit trail verification
./scripts/audit-trail-verification.sh
```

#### ISO 27001 Compliance

```bash
# ISO 27001 controls check
./scripts/iso27001-check.sh

# Risk assessment
./scripts/risk-assessment.sh

# Security policy compliance
./scripts/security-policy-check.sh
```

### Documentation and Reporting

#### Compliance Reports

```bash
# Generate monthly compliance report
./scripts/generate-compliance-report.sh

# Export audit logs
./scripts/export-audit-logs.sh

# Create security assessment
./scripts/security-assessment.sh
```

## Emergency Procedures

### Emergency Stop Operations

#### Manual Emergency Stop

```bash
# Activate emergency stop for station
curl -X POST -H "Authorization: Bearer ${TOKEN}" -H "Content-Type: application/json" \
  -d '{"reason":"Emergency maintenance","operator":"operator001"}' \
  http://localhost:8080/api/v1/pump-stations/station001/emergency-stop

# Clear emergency stop
curl -X DELETE -H "Authorization: Bearer ${TOKEN}" \
  http://localhost:8080/api/v1/pump-stations/station001/emergency-stop
```

#### System Recovery

```bash
# Check emergency stop status
curl -H "Authorization: Bearer ${TOKEN}" \
  http://localhost:8080/api/v1/pump-stations/station001/emergency-stop-status

# Verify system recovery
./scripts/emergency-recovery-check.sh
```

### Disaster Recovery

#### Full System Recovery

```bash
# 1. Stop all services
docker-compose down

# 2. Restore from latest backup
./scripts/restore-full.sh /var/backup/calejo/calejo-backup-latest.tar.gz

# 3. Start services
docker-compose up -d

# 4. Verify recovery
./scripts/health-check.sh
./scripts/emergency-recovery-verification.sh
```

#### Database Recovery

```bash
# 1. Stop database-dependent services
docker-compose stop control-adapter

# 2. Restore database
./scripts/restore-database.sh /var/backup/calejo/database/backup-latest.sql

# 3. Start services
docker-compose up -d

# 4. Verify data integrity
./scripts/database-integrity-check.sh
```

---

*This operations and maintenance guide provides comprehensive procedures for managing the Calejo Control Adapter system. Always follow documented procedures and maintain proper change control for all operational activities.*