version: "1.0.0" name: "Newt Blueprint Generator" description: "Generate and validate Pangolin Newt blueprint configurations in YAML or Docker Labels format. Use when creating Pangolin resource configurations, proxy resources, client resources, authentication settings, or Docker Compose blueprints."

Newt Blueprint Generator

Expert assistance for creating, validating, and managing Pangolin Newt blueprint configurations.

When to Use This Skill

This skill should be triggered when:

• Creating Pangolin blueprint configurations
• Generating YAML configuration files for Newt
• Creating Docker Compose files with Pangolin labels
• Configuring proxy resources (HTTP, TCP, UDP)
• Setting up client resources for Olm
• Configuring authentication (SSO, basic auth, pincode, password)
• Validating blueprint configurations
• Troubleshooting blueprint validation errors
• Converting between YAML and Docker Labels formats

Overview

Pangolin Blueprints are declarative configurations that allow you to define resources and their settings in a structured format. They support two formats:

1. YAML Configuration Files: Standalone configuration files
2. Docker Labels: Configuration embedded in Docker Compose files

Blueprint Formats

YAML Configuration Format

YAML configs can be applied using:

• Newt CLI: Pass --blueprint-file /path/to/blueprint.yaml
• API: POST to /org/{orgId}/blueprint with base64-encoded JSON body

Example Newt usage:

newt --blueprint-file /path/to/blueprint.yaml <other-args>

Docker Labels Format

For containerized applications, blueprints can be defined using Docker labels with the pangolin. prefix.

Enable Docker socket access:

newt --docker-socket /var/run/docker.sock <other-args>

Or use environment variable:

DOCKER_SOCKET=/var/run/docker.sock

Resource Types

Proxy Resources

Proxy resources expose HTTP, TCP, or UDP services through Pangolin.

HTTP Proxy Resource Example

proxy-resources:
  resource-nice-id-uno:
    name: this is a http resource
    protocol: http
    full-domain: uno.example.com
    host-header: example.com
    tls-server-name: example.com
    headers:
      - name: X-Example-Header
        value: example-value
      - name: X-Another-Header
        value: another-value
    rules:
      - action: allow
        match: ip
        value: 1.1.1.1
      - action: deny
        match: cidr
        value: 2.2.2.2/32
      - action: pass
        match: path
        value: /admin
    targets:
      - site: lively-yosemite-toad
        hostname: localhost
        method: http
        port: 8000
      - site: slim-alpine-chipmunk
        hostname: localhost
        path: /admin
        path-match: exact
        method: https
        port: 8001

TCP/UDP Proxy Resource Example

proxy-resources:
  resource-nice-id-dos:
    name: this is a raw resource
    protocol: tcp
    proxy-port: 3000
    targets:
      - site: lively-yosemite-toad
        hostname: localhost
        port: 3000

Targets-Only Resources

Simplified resources containing only target configurations:

proxy-resources:
  additional-targets:
    targets:
      - site: another-site
        hostname: backend-server
        method: https
        port: 8443
      - site: another-site
        hostname: backup-server
        method: http
        port: 8080

Note: When using targets-only resources, name and protocol fields are not required.

Client Resources

Client resources define proxied resources accessible via Olm client (SSH, RDP):

client-resources:
  client-resource-nice-id-uno:
    name: this is my resource
    protocol: tcp
    proxy-port: 3001
    hostname: localhost
    internal-port: 3000
    site: lively-yosemite-toad

Authentication Configuration

Authentication is off by default. Enable by adding fields in the auth section.

Note: Authentication is only allowed on HTTP resources, not TCP/UDP.

proxy-resources:
  secure-resource:
    name: Secured Resource
    protocol: http
    full-domain: secure.example.com
    auth:
      pincode: 123456
      password: your-secure-password
      basic-auth:
        user: asdfa
        password: sadf
      sso-enabled: true
      sso-roles:
        - Member
        - Admin
      sso-users:
        - user@example.com
      whitelist-users:
        - admin@example.com

Docker Labels Format

Complete Docker Compose Example

services:
  newt:
    image: fosrl/newt
    container_name: newt
    restart: unless-stopped
    volumes:
      - /var/run/docker.sock:/var/run/docker.sock
    environment:
      - PANGOLIN_ENDPOINT=https://app.pangolin.net
      - NEWT_ID=h1rbsgku89wf9z3
      - NEWT_SECRET=z7g54mbcwkglpx1aau9gb8mzcccoof2fdbs97keoakg2pp5z
      - DOCKER_SOCKET=/var/run/docker.sock
 
  nginx1:
    image: nginxdemos/hello
    container_name: nginx1
    labels:
      # Proxy Resource Configuration
      - pangolin.proxy-resources.nginx.name=nginx
      - pangolin.proxy-resources.nginx.full-domain=nginx.fosrl.io
      - pangolin.proxy-resources.nginx.protocol=http
      - pangolin.proxy-resources.nginx.headers[0].name=X-Example-Header
      - pangolin.proxy-resources.nginx.headers[0].value=example-value
      # Target Configuration - port and hostname auto-detected
      - pangolin.proxy-resources.nginx.targets[0].method=http
      - pangolin.proxy-resources.nginx.targets[0].path=/path
      - pangolin.proxy-resources.nginx.targets[0].path-match=prefix
 
  nginx2:
    image: nginxdemos/hello
    container_name: nginx2
    labels:
      # Additional target with explicit hostname and port
      - pangolin.proxy-resources.nginx.targets[1].method=http
      - pangolin.proxy-resources.nginx.targets[1].hostname=nginx2
      - pangolin.proxy-resources.nginx.targets[1].port=80
 
networks:
  default:
    name: pangolin_default

Docker Labels Considerations

• Automatic Discovery: When hostname and internal port are not defined, Pangolin auto-detects from container configuration
• Site Assignment: If no site is specified, resource is assigned to the discovering Newt site
• Configuration Merging: Configuration across containers is merged to form complete resource definitions

Configuration Properties Reference

Proxy Resources Properties

Target Configuration Properties

Authentication Properties

Not allowed on TCP/UDP resources.

Rules Configuration Properties

Client Resources Properties

Validation Rules and Constraints

Resource-Level Validations

1. Targets-Only Resources: A resource can contain only targets field, making name and protocol optional
2. Protocol-Specific Requirements:

• HTTP Protocol: Must have full-domain and all targets must have method field
• TCP/UDP Protocol: Must have proxy-port and targets must NOT have method field
• TCP/UDP Protocol: Cannot have auth configuration

1. Port Uniqueness:

• proxy-port values must be unique within proxy-resources
• proxy-port values must be unique within client-resources
• Cross-validation between proxy and client resources is not enforced

1. Domain Uniqueness: full-domain values must be unique across all proxy resources
2. Target Method Requirements: When protocol is http, all non-null targets must specify a method

Common Validation Errors

"Admin role cannot be included in sso-roles"

The Admin role is reserved and cannot be included in the sso-roles array.

Solution: Remove "Admin" from the sso-roles array.

"Duplicate 'full-domain' values found"

Each full-domain must be unique across all proxy resources.

Solution: Use different subdomains or paths for multiple resources.

"Duplicate 'proxy-port' values found"

Port numbers in proxy-port must be unique within their resource type.

Solution: Assign unique port numbers within proxy-resources and client-resources separately.

"When protocol is 'http', all targets must have a 'method' field"

All targets in HTTP proxy resources must specify the connection method.

Solution: Add method: http, method: https, or method: h2c to all targets.

"When protocol is 'tcp' or 'udp', targets must not have a 'method' field"

TCP and UDP targets should not include the method field.

Solution: Remove the method field from TCP/UDP resource targets.

"When protocol is 'tcp' or 'udp', 'auth' must not be provided"

Authentication is only supported for HTTP resources.

Solution: Remove the auth section from TCP/UDP resources.

"Resource must either be targets-only or have both 'name' and 'protocol' fields"

Resources must be either targets-only or complete resource definitions.

Solution: Either provide only targets field, or include both name and protocol fields.

Workflow for Generating Blueprints

When a user requests a Pangolin Newt blueprint configuration:

1. Gather Requirements:

• Resource type (proxy or client)
• Protocol (HTTP, TCP, UDP)
• Domain or port requirements
• Target endpoints (hostname, port, site)
• Authentication needs (if HTTP)
• Access control rules (if any)
• Format preference (YAML or Docker Labels)

1. Select Format:

• Use YAML for standalone configurations or API deployment
• Use Docker Labels for containerized applications

1. Validate Configuration:

• Ensure protocol-specific requirements are met
• Check for unique full-domain (HTTP) or proxy-port (TCP/UDP)
• Verify authentication is only on HTTP resources
• Confirm all HTTP targets have method field
• Ensure TCP/UDP targets don't have method field

1. Generate Configuration:

• Create well-structured YAML or Docker Compose file
• Include helpful comments explaining each section
• Follow naming conventions (kebab-case for resource IDs)

1. Provide Usage Instructions:

• Explain how to apply the configuration (Newt CLI or API)
• Document any environment variables needed
• Include validation commands if applicable

Best Practices

1. Resource IDs: Use descriptive, kebab-case identifiers (e.g., web-app-prod, database-backup)
2. Target Organization: Group related targets under the same resource ID
3. Security First: Enable authentication for sensitive HTTP resources
4. Port Management: Document port assignments to avoid conflicts
5. Site Assignment: Explicitly specify site for multi-site deployments
6. Path Matching: Use prefix for broad matches, exact for specific endpoints
7. Headers: Add custom headers for backend requirements (e.g., X-Forwarded-* headers)
8. Rules: Order rules from most specific to least specific
9. Validation: Always validate configurations before deployment
10. Documentation: Include comments in YAML or Docker Compose files explaining non-obvious choices

Resources

• API Documentation: https://api.pangolin.net/v1/docs/#/Organization/put_org__orgId__blueprint
• Python Example: https://github.com/fosrl/pangolin/blob/dev/blueprint.py
• Official Docs: https://docs.pangolin.net/manage/blueprints

Example Use Cases

Use Case 1: Simple Web Application

Requirements: Expose a web app running on localhost:8080 via HTTPS at app.example.com

proxy-resources:
  web-app:
    name: Web Application
    protocol: http
    full-domain: app.example.com
    targets:
      - hostname: localhost
        port: 8080
        method: https

Use Case 2: TCP Database Access

Requirements: Expose PostgreSQL database on port 5432

proxy-resources:
  postgres-db:
    name: PostgreSQL Database
    protocol: tcp
    proxy-port: 5432
    targets:
      - hostname: localhost
        port: 5432

Use Case 3: Multi-Target Load Balanced HTTP Service

Requirements: Multiple backend servers for the same domain

proxy-resources:
  api-service:
    name: API Service
    protocol: http
    full-domain: api.example.com
    targets:
      - site: site-01
        hostname: backend-01
        port: 8080
        method: http
      - site: site-02
        hostname: backend-02
        port: 8080
        method: http

Use Case 4: Secured Resource with SSO

Requirements: Web app with SSO authentication

proxy-resources:
  secure-app:
    name: Secure Application
    protocol: http
    full-domain: secure.example.com
    auth:
      sso-enabled: true
      sso-roles:
        - Member
        - Developer
      sso-users:
        - admin@example.com
    targets:
      - hostname: localhost
        port: 3000
        method: https

Communication Style

When generating blueprints:

• Ask clarifying questions if requirements are unclear
• Explain validation errors in plain language
• Provide complete, working examples
• Include comments for complex configurations
• Suggest security best practices proactively
• Offer both YAML and Docker Labels formats when appropriate