Multi-Domain Setup

vNext Runtime supports running multiple domains simultaneously on the same infrastructure. Teams can run isolated domain environments (core, sales, hr, etc.) sharing the same PostgreSQL, Redis, Vault, and Dapr services.

tip

Each domain has its own orchestration, execution, worker-inbox, worker-outbox, and init containers — but shared infrastructure (DB, Redis, Vault, Dapr) runs as a single instance.

Folder Structure

vnext/docker/
├── templates/                              # Template files for new domains
│   ├── .env                                # Main env template with {{PLACEHOLDERS}}
│   ├── .env.orchestration                  # Orchestration template
│   ├── .env.execution                      # Execution template
│   ├── .env.worker-inbox                   # Inbox worker template
│   ├── .env.worker-outbox                  # Outbox worker template
│   └── appsettings.*.Development.json      # App settings templates
├── domains/                                # Domain configurations
│   ├── core/                               # Domain: core
│   ├── sales/                              # Domain: sales
│   └── <domain_name>/                      # Your domain
│       ├── .env
│       ├── .env.orchestration
│       ├── .env.execution
│       ├── .env.worker-inbox
│       ├── .env.worker-outbox
│       └── appsettings.*.Development.json
├── config/                                 # Shared infrastructure config
├── docker-compose.yml
└── create-domain.sh                        # Script to create domains from templates

Creating a New Domain

Use the create-domain command to generate domain configuration from templates:

# Create domain with port offset (to avoid port conflicts)
# Note: core (offset 0) and discovery (offset 5) are pre-configured
# Use offset 10 or higher for custom domains
make create-domain DOMAIN=sales PORT_OFFSET=10
make create-domain DOMAIN=hr PORT_OFFSET=20
make create-domain DOMAIN=finance PORT_OFFSET=30

This generates:

• Environment files with domain-specific DAPR store names, ports, and app IDs
• Appsettings files with domain-specific database connection strings
• Proper OTEL service names for observability

The database name is auto-generated from the domain name:

• core → vNext_Core
• sales → vNext_Sales
• user-management → vNext_User_Management

Port Allocation

Each domain uses unique ports based on PORT_OFFSET:

Offset	Domain (Example)	App Port	Execution	Inbox	Outbox	Init
0	core (reserved)	4201	4202	4203	4204	3005
5	discovery (reserved)	4206	4207	4208	4209	3010
10	sales	4211	4212	4213	4214	3015
20	hr	4221	4222	4223	4224	3025
30	finance	4231	4232	4233	4234	3035

Dapr ports use offset * 100 to avoid conflicts.

Reserved Offsets

The core and discovery domains are pre-configured with offsets 0 and 5 respectively. Do not use these offsets for your custom domains. Start with offset 10 or higher for new domains.

Running Multiple Domains

# 1. Start shared infrastructure
make up-infra

# 2. Pre-configured domains (core and discovery) are ready to use
make up-vnext DOMAIN=core
make up-vnext DOMAIN=discovery

# 3. Create and start your own domain (use offset 10 or higher)
make create-domain DOMAIN=sales PORT_OFFSET=10
make db-create DOMAIN=sales
make up-vnext DOMAIN=sales

# 4. View all running services
make status-all-domains

# 5. Check health of a specific domain
make health DOMAIN=core
make health DOMAIN=sales

Domain Management

# List all configured domains
make list-domains

# Stop a specific domain
make down-vnext DOMAIN=sales

# Restart a specific domain
make restart-vnext DOMAIN=sales

# Stop all domains but keep infrastructure
make down-all-vnext

# View logs for a specific domain
make logs-vnext DOMAIN=core

Customizing Templates

Templates live in vnext/docker/templates/. They use {{PLACEHOLDER}} syntax:

Placeholder	Description
{{DOMAIN_NAME}}	Domain name (e.g., core, sales)
{{PORT_OFFSET}}	Port offset value
{{DB_NAME}}	Database name (e.g., vNext_Core)
{{VNEXT_APP_PORT}}	Orchestration port
{{DAPR_*_PORT}}	Dapr sidecar ports

Auto-generated environment variables:

Variable	Description
DAPR_STATE_STORE_NAME	Dapr state store name (required)
DAPR_SECRET_STORE_NAME	Dapr secret store name
DAPR_PUBSUB_STORE_NAME	Dapr pubsub store name
DAPR_APP_ID	Unique Dapr app identifier per service
OTEL_SERVICE_NAME	OpenTelemetry service name

Legacy Single-Domain Mode

For backwards compatibility, the legacy change-domain command still works:

make change-domain DOMAIN=mycompany

This updates all domain-related settings but does not support running multiple domains simultaneously.

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Distilled from vnext-runtime/README.md.