Advanced Features
This guide covers advanced features and capabilities of the Docker Compose Wrapper.
Custom Health Checks
Configure custom health checks for your services:
services:
web:
healthcheck:
test: ["CMD", "curl", "-f", "http://localhost:8080/health"]
interval: 30s
timeout: 10s
retries: 3
start_period: 40s
Resource Management
CPU and Memory Limits
services:
web:
deploy:
resources:
limits:
cpus: '0.50'
memory: 512M
reservations:
cpus: '0.25'
memory: 256M
GPU Support
services:
ml:
deploy:
resources:
reservations:
devices:
- driver: nvidia
count: 1
capabilities: [gpu]
Advanced Networking
Custom Networks
networks:
frontend:
driver: bridge
ipam:
driver: default
config:
- subnet: 172.28.0.0/16
backend:
driver: bridge
internal: true
ipam:
driver: default
config:
- subnet: 172.29.0.0/16
Network Aliases
services:
web:
networks:
frontend:
aliases:
- web.local
- www.local
Volume Management
Named Volumes
volumes:
db_data:
driver: local
driver_opts:
type: none
o: bind
device: /path/to/data
Volume Templates
services:
web:
volumes:
- ${VOLUME_PREFIX:-/var/lib}/web/data:/app/data
- ${CONFIG_PATH:-./config}:/app/config
Secrets Management
Docker Secrets
services:
web:
secrets:
- db_password
- api_key
secrets:
db_password:
file: ./secrets/db_password.txt
api_key:
external: true
Environment Variables
services:
web:
environment:
- DB_PASSWORD=${DB_PASSWORD}
- API_KEY=${API_KEY}
Advanced Templates
Conditional Rendering
services:
web:
ports:
- "443:443"
volumes:
- ./ssl:/etc/ssl
Loops and Ranges
services:
:
image:
deploy:
replicas:
Custom Plugins
Plugin Structure
type Plugin interface {
Name() string
Execute(ctx context.Context, args []string) error
}
Example Plugin
type HealthCheckPlugin struct{}
func (p *HealthCheckPlugin) Name() string {
return "health-check"
}
func (p *HealthCheckPlugin) Execute(ctx context.Context, args []string) error {
// Plugin implementation
return nil
}
Release Management
Version Control
# Chart.yaml
name: myapp
version: 1.0.0
description: My Application Chart
type: application
Release History
releases/
├── v1/
│ ├── values.yaml
│ └── docker-compose.yaml
├── v2/
│ ├── values.yaml
│ └── docker-compose.yaml
└── current -> v2
Advanced Deployment Strategies
Blue-Green Deployment
services:
web-blue:
image: myapp/web:v1
deploy:
replicas: 3
web-green:
image: myapp/web:v2
deploy:
replicas: 0
Canary Deployments
services:
web-stable:
image: myapp/web:v1
deploy:
replicas: 3
web-canary:
image: myapp/web:v2
deploy:
replicas: 1
Monitoring and Logging
Prometheus Integration
services:
web:
labels:
- "prometheus.enable=true"
- "prometheus.port=9090"
- "prometheus.path=/metrics"
Log Aggregation
services:
web:
logging:
driver: "json-file"
options:
max-size: "10m"
max-file: "3"
Security Features
Read-only Containers
services:
web:
read_only: true
tmpfs:
- /tmp
- /var/run
Security Profiles
services:
web:
security_opt:
- no-new-privileges:true
cap_drop:
- ALL
cap_add:
- NET_BIND_SERVICE
Best Practices
- Resource Management
- Set appropriate resource limits
- Monitor resource usage
- Use resource reservations
- Security
- Use read-only containers
- Drop unnecessary capabilities
- Implement security profiles
- Networking
- Use custom networks
- Implement network policies
- Use network aliases
- Storage
- Use named volumes
- Implement backup strategies
- Monitor storage usage
Troubleshooting
Advanced Debugging
# Check container details
docker inspect <container-id>
# View container logs with timestamps
docker logs -t <container-id>
# Check resource usage
docker stats <container-id>
Performance Tuning
# Adjust container limits
dcw up --cpus 2 --memory 1G
# Monitor performance
dcw stats