Enhanced Horizontal Scaling: Docker Compose Replicas + Auto-scaling (HPA)

What problem will this feature address?

Currently, Dokploy supports replicas for some deployment types but not for Docker Compose applications. Additionally, there's no Horizontal Pod Autoscaling (HPA) capability to automatically adjust the number of replicas based on resource utilization or custom metrics.

This creates limitations when:

• Docker Compose applications need to scale horizontally under load
• Manual scaling intervention is required during traffic spikes
• Applications need automatic scaling down during low usage periods
• Cost optimization through dynamic resource allocation is needed

Describe the solution you'd like

1. Docker Compose Replica Support:

• Extend existing replica functionality to Docker Compose applications
• Allow users to set replica count for services within Docker Compose files
• Maintain service discovery and load balancing between replicas

2. Horizontal Pod Autoscaling (HPA):

• CPU-based autoscaling (scale up when CPU > threshold, scale down when < threshold)
• Memory-based autoscaling
• Custom metrics support (HTTP requests/sec, queue length, etc.)
• Configurable min/max replica limits

Describe alternatives you've considered

• Manual scaling: Requires constant monitoring and intervention
• External monitoring + webhooks: Complex setup, breaks Dokploy's simplicity
• Cloud-specific autoscaling: Vendor lock-in, doesn't work for self-hosted
• Script-based scaling: Unreliable, hard to maintain

Additional context

This would complete Dokploy's scaling story by:

• Bringing Docker Compose apps to feature parity with other deployment types
• Adding intelligent automatic scaling for all supported applications
• Reducing operational overhead for users
• Improving resource efficiency and cost management

Will you send a PR to implement it?

Yes

No files, tests, or entry points are named. Start by locating the existing replica functionality and Docker Compose deployment path, then map how scaling is configured for supported deployment types. Done should include configurable Compose service replicas and min/max CPU, memory, and custom-metric autoscaling with service discovery and load balancing.