SDL Networking

Expose ports and configure networking for your deployments.

Port Exposure

expose:
  - port: 80          # Container port
    as: 80            # External port
    to:
      - global: true  # Internet accessible
  - port: 443
    as: 443
    to:
      - global: true

Port Configuration Options

Field	Description
`port`	Container internal port (where your app listens)
`as`	External port number (what users connect to)
`to.global`	If true, accessible from internet via deployment URL

Common Port Configurations

Web Server (HTTP/HTTPS)

expose:
  - port: 80
    as: 80
    to:
      - global: true

Node.js API

expose:
  - port: 3000
    as: 3000
    to:
      - global: true

Multiple Ports

expose:
  - port: 80
    as: 80
    to:
      - global: true
  - port: 443
    as: 443
    to:
      - global: true
  - port: 8080
    as: 8080
    to:
      - global: true

Internal Service Communication

Services within the same deployment can communicate using service names:

services:
  api:
    image: node:20-alpine
    expose:
      - port: 3000
        as: 3000
        to:
          - global: true
    env:
      - REDIS_HOST=cache    # Uses service name

  cache:
    image: redis:alpine
    # No expose needed - only internal access

Services without global: true are only accessible from other services in the same deployment. Use Docker's internal DNS (service name as hostname) for inter-service communication.

Deployment URLs

When your deployment starts, it gets a URL like:

https://web-17628738.deployments.kovanetwork.com

The format is: {service}-{deployment-id}.deployments.kovanetwork.com