# CMC Sales Deployment Guide

## Overview

This guide covers deploying the CMC Sales application to a Debian 12 VM at `cmc.springupsoftware.com` with both staging and production environments.

## Architecture

- **Production**: `https://cmc.springupsoftware.com`
- **Staging**: `https://staging.cmc.springupsoftware.com`
- **Components**: CakePHP legacy app, Go modern app, MariaDB, Nginx reverse proxy
- **SSL**: Let's Encrypt certificates
- **Authentication**: Basic auth for both environments

## Prerequisites

### Server Setup (Debian 12)

```bash
# Update system
sudo apt update && sudo apt upgrade -y

# Install Docker and Docker Compose
sudo apt install -y docker.io docker-compose-plugin
sudo systemctl enable docker
sudo systemctl start docker

# Add user to docker group
sudo usermod -aG docker $USER
# Log out and back in

# Create backup directory
sudo mkdir -p /var/backups/cmc-sales
sudo chown $USER:$USER /var/backups/cmc-sales
```

### DNS Configuration

Ensure these DNS records point to your server:
- `cmc.springupsoftware.com` → Server IP
- `staging.cmc.springupsoftware.com` → Server IP

## Initial Deployment

### 1. Clone Repository

```bash
cd /home/cmc
git clone git@code.springupsoftware.com:cmc/cmc-sales.git cmc-sales
sudo chown -R $USER:$USER cmc-sales
cd cmc-sales
```

### 2. Environment Configuration

```bash
# Copy environment files
cp .env.staging go-app/.env.staging
cp .env.production go-app/.env.production

# Edit with actual passwords -- up to this.
nano .env.staging
nano .env.production

# Create credential directories
mkdir -p credentials/staging credentials/production
```

### 3. Gmail OAuth Setup

For each environment (staging/production):

1. Go to [Google Cloud Console](https://console.cloud.google.com)
2. Create/select project
3. Enable Gmail API
4. Create OAuth 2.0 credentials
5. Download `credentials.json`
6. Place in appropriate directory:
   - Staging: `credentials/staging/credentials.json`
   - Production: `credentials/production/credentials.json`

Generate tokens (run on local machine first):
```bash
cd go-app
go run cmd/auth/main.go
# Follow OAuth flow
# Copy token.json to appropriate credential directory
```

### 4. SSL Certificates

```bash
# Start proxy services (includes Lego container)
docker compose -f docker-compose.proxy.yml up -d

# Setup SSL certificates using Lego
./scripts/setup-lego-certs.sh accounts@springupsoftware.com

# Verify certificates
./scripts/lego-list-certs.sh
```

### 5. Database Initialization

```bash
# Start database containers first
docker compose -f docker-compose.staging.yml up -d db-staging
docker compose -f docker-compose.production.yml up -d db-production

# Wait for databases to be ready
sleep 30

# Restore production database (if you have a backup)
./scripts/restore-db.sh production /path/to/backup.sql.gz

# Or initialize empty database and run migrations
# (implementation specific)
```

## Deployment Commands

### Starting Services

```bash
# Start staging environment
docker compose -f docker-compose.staging.yml up -d

# Start production environment  
docker compose -f docker-compose.production.yml up -d

# Wait for services to be ready
sleep 10

# Start reverse proxy (after both environments are running)
docker compose -f docker-compose.proxy.yml up -d

# Or use the make command for full stack deployment
make full-stack
```

### Updating Applications

```bash
# Pull latest code
git pull origin main

# Rebuild and restart staging
docker compose -f docker-compose.staging.yml down
docker compose -f docker-compose.staging.yml build --no-cache
docker compose -f docker-compose.staging.yml up -d

# Test staging thoroughly, then update production
docker compose -f docker-compose.production.yml down
docker compose -f docker-compose.production.yml build --no-cache
docker compose -f docker-compose.production.yml up -d
```

## Monitoring and Maintenance

### Health Checks

```bash
# Check all containers
docker ps

# Check logs
docker compose -f docker-compose.production.yml logs -f

# Check application health
curl https://cmc.springupsoftware.com/health
curl https://staging.cmc.springupsoftware.com/health
```

### Database Backups

```bash
# Manual backup
./scripts/backup-db.sh production
./scripts/backup-db.sh staging

# Set up automated backups (cron)
sudo crontab -e
# Add: 0 2 * * * /opt/cmc-sales/scripts/backup-db.sh production
# Add: 0 3 * * * /opt/cmc-sales/scripts/backup-db.sh staging
```

### Log Management

```bash
# View nginx logs
sudo tail -f /var/log/nginx/access.log
sudo tail -f /var/log/nginx/error.log

# View application logs
docker compose -f docker-compose.production.yml logs -f cmc-go-production
docker compose -f docker-compose.staging.yml logs -f cmc-go-staging
```

### SSL Certificate Renewal

```bash
# Manual renewal
./scripts/lego-renew-cert.sh all

# Renew specific domain
./scripts/lego-renew-cert.sh cmc.springupsoftware.com

# Set up auto-renewal (cron)
sudo crontab -e
# Add: 0 2 * * * /opt/cmc-sales/scripts/lego-renew-cert.sh all
```

## Security Considerations

### Basic Authentication

Update passwords in `userpasswd` file:
```bash
# Generate new password hash
sudo apt install apache2-utils
htpasswd -c userpasswd username

# Restart nginx containers
docker compose -f docker-compose.proxy.yml restart nginx-proxy
```

### Database Security

- Use strong passwords in environment files
- Database containers are not exposed externally in production
- Regular backups with encryption at rest

### Network Security

- All traffic encrypted with SSL/TLS
- Rate limiting configured in nginx
- Security headers enabled
- Docker networks isolate environments

## Troubleshooting

### Common Issues

1. **Containers won't start**
   ```bash
   # Check logs
   docker compose logs container-name
   
   # Check system resources
   df -h
   free -h
   ```

2. **SSL issues**
   ```bash
   # Check certificate status
   ./scripts/lego-list-certs.sh
   
   # Test SSL configuration
   curl -I https://cmc.springupsoftware.com
   
   # Manually renew certificates
   ./scripts/lego-renew-cert.sh all
   ```

3. **Database connection issues**
   ```bash
   # Test database connectivity
   docker exec -it cmc-db-production mysql -u cmc -p
   ```

4. **Gmail API issues**
   ```bash
   # Check credentials are mounted
   docker exec -it cmc-go-production ls -la /root/credentials/
   
   # Check logs for OAuth errors
   docker compose logs cmc-go-production | grep -i gmail
   ```

### Emergency Procedures

1. **Quick rollback**
   ```bash
   # Stop current containers
   docker compose -f docker-compose.production.yml down
   
   # Restore from backup
   ./scripts/restore-db.sh production /var/backups/cmc-sales/latest_backup.sql.gz
   
   # Start previous version
   git checkout previous-commit
   docker compose -f docker-compose.production.yml up -d
   ```

2. **Database corruption**
   ```bash
   # Stop application
   docker compose -f docker-compose.production.yml stop cmc-go-production cmc-php-production
   
   # Restore from backup
   ./scripts/restore-db.sh production /var/backups/cmc-sales/backup_production_YYYYMMDD-HHMMSS.sql.gz
   
   # Restart application
   docker compose -f docker-compose.production.yml start cmc-go-production cmc-php-production
   ```

## File Structure

```
/opt/cmc-sales/
├── docker-compose.staging.yml
├── docker-compose.production.yml
├── docker-compose.proxy.yml
├── conf/
│   ├── nginx-staging.conf
│   ├── nginx-production.conf
│   └── nginx-proxy.conf
├── credentials/
│   ├── staging/
│   │   ├── credentials.json
│   │   └── token.json
│   └── production/
│       ├── credentials.json
│       └── token.json
├── scripts/
│   ├── backup-db.sh
│   ├── restore-db.sh
│   ├── lego-obtain-cert.sh
│   ├── lego-renew-cert.sh
│   ├── lego-list-certs.sh
│   └── setup-lego-certs.sh
└── .env files
```

## Performance Tuning

### Resource Limits

Resource limits are configured in the Docker Compose files:
- Production: 2 CPU cores, 2-4GB RAM per service
- Staging: More relaxed limits for testing

### Database Optimization

```sql
-- Monitor slow queries
SHOW VARIABLES LIKE 'slow_query_log';
SET GLOBAL slow_query_log = 'ON';
SET GLOBAL long_query_time = 2;

-- Check database performance
SHOW PROCESSLIST;
SHOW ENGINE INNODB STATUS;
```

### Nginx Optimization

- Gzip compression enabled
- Static file caching
- Connection keep-alive
- Rate limiting configured