GAL v1.3.0 - Implementierungsplan¶

Status: ✅ RELEASED - 2025-10-19 Focus: Import/Migration & Provider Portability Estimated Effort: 12 Wochen Actual Effort: 12 Wochen (100% on target)

🎯 Mission¶

Provider Lock-in brechen: Ermögliche Migration bestehender Gateway-Konfigurationen zu GAL und damit zu jedem anderen Provider.

Vision¶

Unternehmen mit bestehenden Gateway-Deployments (Nginx, HAProxy, Kong, etc.) können ihre Konfigurationen automatisch zu GAL konvertieren und damit: 1. Portabilität gewinnen - Wechsel zu anderem Provider in Minuten statt Wochen 2. Vendor Lock-in vermeiden - Nicht mehr an einen Provider gebunden 3. Multi-Provider nutzen - Gleiche Config auf verschiedenen Providern 4. Migration vereinfachen - Nginx → HAProxy, Kong → Envoy, etc.

📋 Feature Overview¶

#	Feature	Priority	Status	Effort	Dependencies
1	Envoy Import (YAML Parser)	🔴 High	✅ Done	1 Woche	-
2	Kong Import (YAML Parser)	🔴 High	✅ Done	1 Woche	Feature 1
3	APISIX Import (JSON/YAML Parser)	🔴 High	✅ Done	1 Woche	Features 1-2
4	Traefik Import (YAML Parser)	🔴 High	✅ Done	1 Woche	Features 1-3
5	Nginx Import (Custom Parser)	🔴 High	✅ Done	2 Wochen	Features 1-4
6	HAProxy Import (Custom Parser)	🔴 High	✅ Done	2 Wochen	Features 1-5
7	Compatibility Checker & Comparison	🟡 Medium	✅ Done	2 Wochen	Features 1-6
8	Migration Assistant (Interactive CLI)	🟡 Medium	✅ Done	2 Wochen	Features 1-7

Total Estimated Effort: 12 Wochen Progress: 8/8 Features completed (100%) 🎉

Release Strategy: - v1.3.0-alpha1 (Week 2): Envoy + Kong Import ✅ COMPLETE - v1.3.0-alpha2 (Week 4): + APISIX + Traefik Import ✅ COMPLETE - v1.3.0-beta1 (Week 6): + Nginx Import ✅ COMPLETE - v1.3.0-beta2 (Week 8): + HAProxy Import ✅ COMPLETE - v1.3.0-rc1 (Week 10): + Compatibility Checker ✅ COMPLETE - v1.3.0 Final (Week 12): + Migration Assistant ✅ COMPLETE

🎯 Shared Infrastructure (All Features)¶

Provider Interface Extension¶

File: gal/provider.py

from abc import ABC, abstractmethod
from typing import List, Dict, Any

class Provider(ABC):
    """Abstract base class for all gateway providers."""

    @abstractmethod
    def parse(self, provider_config: str) -> Config:
        """Parse provider-specific config to GAL (NEU!)."""
        pass

    def get_import_warnings(self) -> List[str]:
        """Return warnings from last parse operation."""
        return []

    def get_import_report(self) -> Dict[str, Any]:
        """Return detailed import report."""
        return {
            "features_mapped": [],
            "features_skipped": [],
            "warnings": [],
            "provider_specific": {}
        }

CLI Command: `gal import`¶

# Import provider config to GAL
gal import --provider nginx --input nginx.conf --output gal-config.yaml

# Dry-run to preview
gal import --provider envoy --input envoy.yaml --dry-run

# With import report
gal import --provider haproxy --input haproxy.cfg --output gal.yaml --report import-report.json

Feature Mapping Matrix¶

GAL Feature	Envoy	Kong	APISIX	Traefik	Nginx	HAProxy
Routing (path_prefix)	✅	✅	✅	✅	✅	✅
Methods (GET, POST)	✅	✅	✅	✅	✅	✅
Upstream (targets)	✅	✅	✅	✅	✅	✅
Load Balancing	✅	✅	✅	✅	✅	✅
Rate Limiting	✅	✅	✅	✅	✅	✅
Basic Auth	⚠️	✅	✅	✅	✅	✅
JWT Auth	✅	✅	✅	⚠️	⚠️	⚠️
Headers	✅	✅	✅	✅	✅	✅
CORS	✅	✅	✅	✅	✅	✅
Health Checks	✅	✅	✅	✅	⚠️	✅

📦 Feature 1: Envoy Import (YAML Parser)¶

Status: ✅ IMPLEMENTED | Effort: 1 Woche | Release: v1.3.0-alpha1 | Commits: 652a78d, 067c197

✅ Implementation Summary¶

Provider Implementation: gal/providers/envoy.py:1159-1381

name="__codelineno-2-1" href="#__codelineno-2-1">class EnvoyProvider(Provider): def parse(self, provider_config: str) -> Config: """Parse Envoy YAML configuration to GAL format. class="sd"> Converts static_resources configuration into GAL Config model. class="sd"> Extracts clusters, listeners, routes, health checks, and load balancing. class="sd"> """ envoy_config = yaml.safe_load(provider_config) # Parse clusters → Services services = [] cluster_map = {} for cluster in clusters: service = self._parse_cluster(cluster) services.append(service) cluster_map[cluster.get("name")] = service # Parse listeners/routes for listener in listeners: self._parse_listener_routes(listener, cluster_map) return Config(version="1.0", provider="envoy", services=services)

Helper Methods: - _parse_cluster(): Cluster → Service conversion with targets, health checks, load balancing - _map_envoy_lb_policy(): Maps Envoy LB policies to GAL algorithms - _parse_listener_routes(): Extracts routes from HTTP connection manager

CLI Command: gal/gal-cli.py:225-368 (import-config)

gal import-config --provider envoy \
                  --input envoy.yaml \
                  --output gal-config.yaml

Manager Extension: gal/manager.py:217-239 (get_provider())

Tests: tests/test_import_envoy.py - 15 tests, all passing ✅ - Basic Import (3 tests): Simple cluster, weighted targets, routes - Health Checks (3 tests): Active, passive, combined - Load Balancing (5 tests): All algorithms (ROUND_ROBIN, LEAST_REQUEST, RING_HASH, etc.) - Multi-Service (1 test): Multiple clusters - Error Handling (3 tests): Invalid YAML, empty config, no endpoints

Supported Features: - ✅ Clusters → Services (name extraction: api_cluster → api) - ✅ Load assignment endpoints → UpstreamTargets (with weights) - ✅ Health checks → ActiveHealthCheck (HTTP probes with interval/timeout/thresholds) - ✅ Outlier detection → PassiveHealthCheck (consecutive_5xx → max_failures) - ✅ Load balancing policies → LoadBalancerConfig (all algorithms mapped) - ✅ Listeners + route_config → Routes (path prefix extraction) - ✅ Multiple clusters → Multiple services

Example:

# Input: envoy.yaml
static_resources:
  clusters:
  - name: api_cluster
    lb_policy: ROUND_ROBIN
    load_assignment:
      endpoints:
      - lb_endpoints:
        - endpoint:
            address: {socket_address: {address: api.internal, port_value: 8080}}
          load_balancing_weight: {value: 2}

# Output: gal-config.yaml
services:
- name: api
  type: rest
  upstream:
    targets:
    - {host: api.internal, port: 8080, weight: 2}
    load_balancer: {algorithm: round_robin}
  routes:
  - path_prefix: /api

Coverage: 16% (new parsing code covered by tests)

📖 Detail-Dokumentation: docs/import/envoy.md

📦 Feature 2: Kong Import (YAML/JSON Parser)¶

Status: ✅ IMPLEMENTED | Effort: 1 Woche | Release: v1.3.0-alpha1 | Commit: 93845e7

✅ Implementation Summary¶

Provider Implementation: gal/providers/kong.py:765-1210 (~470 lines, 15 helper methods)

class KongProvider(Provider):
    def parse(self, provider_config: str) -> Config:
        """Parse Kong declarative config (YAML/JSON) to GAL format.

        Supports Kong 3.0 declarative config with services, routes,
        upstreams, targets, and plugins.
        """
        # Try YAML first, then JSON
        kong_config = yaml.safe_load(provider_config) or json.loads(provider_config)

        # Create default global config (Kong proxy port 8000)
        global_config = GlobalConfig(host="0.0.0.0", port=8000, timeout="60s")

        return Config(
            version="1.0",
            provider="kong",
            global_config=global_config,
            services=self._parse_services(kong_config)
        )

Helper Methods (15 methods):

Service & Upstream Parsing: - _parse_services(): Orchestrates service parsing from Kong config - _parse_service(): Converts Kong service → GAL Service (with type="rest", protocol="http") - _parse_upstream(): Parses Kong upstream with targets and health checks - _parse_targets(): Extracts UpstreamTarget list with weights - _map_lb_algorithm(): Maps Kong LB algorithms to GAL - round-robin → round_robin - least-connections → least_conn - consistent-hashing → ip_hash - latency → least_conn

Health Checks: - _parse_health_check(): Parses active + passive health checks - Active: http_path, interval, timeout, healthy/unhealthy thresholds - Passive: max_failures from unhealthy.http_failures

Route & Plugin Parsing: - _parse_route(): Converts Kong routes with path/methods and applies plugins

Rate Limiting: - _parse_rate_limiting_plugin(): Converts rate-limiting plugin config - Supports: second, minute, hour, day, month, year - Converts to requests_per_second (e.g., minute: 600 → 10 req/s) - Maps limit_by to key_type (ip, header, consumer)

Authentication (with import warnings): - _parse_key_auth_plugin(): API Key authentication - Extracts key_names (defaults to "apikey") - Sets in_location="header" - ⚠️ Warning: API keys not imported for security

_parse_basic_auth_plugin(): Basic authentication
Creates BasicAuthConfig with empty users dict
⚠️ Warning: User credentials not imported for security
_parse_jwt_plugin(): JWT authentication
Maps algorithm to algorithms list
Sets issuer/audience to "CONFIGURE_MANUALLY"
⚠️ Warning: JWT secrets not imported for security

Header Manipulation: - _parse_request_transformer_plugin(): Request header add/remove - Parses "Header:Value" format to dict - _parse_response_transformer_plugin(): Response header add/remove - _enrich_response_headers(): Merges response headers from multiple plugins

CORS: - _parse_cors_plugin(): Parses CORS config - origins, methods, headers, credentials, max_age

Utilities: - get_import_warnings(): Returns list of import warnings for user review

CLI Command: gal-cli.py:225-368 (already implemented)

gal import-config --provider kong \
                  --input kong.yaml \
                  --output gal-config.yaml

Tests: tests/test_import_kong.py - 21 tests, all passing ✅

Test Coverage: - TestKongImportBasic (3 tests): Simple service, service+route, JSON format - TestKongImportUpstream (2 tests): Targets with weights, all LB algorithms - TestKongImportHealthChecks (3 tests): Active, passive, combined - TestKongImportRateLimiting (2 tests): Second-based, minute-based (with conversion) - TestKongImportAuthentication (3 tests): Key-auth, basic-auth, JWT (all with warning checks) - TestKongImportHeaders (2 tests): Request transformer, response transformer - TestKongImportCORS (1 test): CORS plugin with all options - TestKongImportMultiService (1 test): 3 services with routes - TestKongImportErrors (3 tests): Invalid YAML, empty config, service without name - TestKongImportCombined (1 test): Production config with all features

Supported Features: - ✅ Services & Upstreams (URL parsing: http://host:port) - ✅ Targets with weights - ✅ Load Balancing (4 algorithms: round-robin, least-connections, consistent-hashing, latency) - ✅ Active Health Checks (http_path, interval, timeout, healthy/unhealthy thresholds) - ✅ Passive Health Checks (max_failures from traffic monitoring) - ✅ Rate Limiting (second/minute/hour/day conversion to req/s) - ✅ API Key Authentication (key_names extraction) - ✅ Basic Authentication (with security warning) - ✅ JWT Authentication (algorithm mapping, with security warning) - ✅ Request Header Transformation (add/remove with "Header:Value" parsing) - ✅ Response Header Transformation (add/remove) - ✅ CORS (origins, methods, headers, credentials, max_age) - ✅ Multiple Services & Routes - ✅ YAML & JSON format support

Import Warnings (Security): - ⚠️ API keys not imported (security) - user must configure manually - ⚠️ Basic auth user credentials not imported (security) - ⚠️ JWT secrets not imported (security) - issuer/audience set to "CONFIGURE_MANUALLY"

Example:

# Input: kong.yaml
_format_version: "3.0"
services:
  - name: api_service
    url: http://api_upstream
upstreams:
  - name: api_upstream
    algorithm: round-robin
    healthchecks:
      active:
        http_path: /health
        healthy: {interval: 10, successes: 2}
        unhealthy: {http_failures: 3}
targets:
  - upstream: api_upstream
    target: api-1:8080
    weight: 100
routes:
  - name: api_route
    service: api_service
    paths: [/api/v1]
    methods: [GET, POST]
plugins:
  - name: rate-limiting
    route: api_route
    config: {second: 100, limit_by: ip}
  - name: key-auth
    route: api_route
    config: {key_names: [apikey]}
  - name: cors
    route: api_route
    config: {origins: ["https://app.example.com"], credentials: true}

# Output: gal-config.yaml (simplified)
services:
- name: api_service
  type: rest
  protocol: http
  upstream:
    targets:
    - {host: api-1, port: 8080, weight: 100}
    load_balancer: {algorithm: round_robin}
    health_check:
      active: {enabled: true, http_path: /health, interval: "10s", healthy_threshold: 2, unhealthy_threshold: 3}
  routes:
  - path_prefix: /api/v1
    methods: [GET, POST]
    rate_limit: {enabled: true, requests_per_second: 100, key_type: ip_address}
    authentication: {enabled: true, type: api_key, api_key: {key_name: apikey}}
    cors: {enabled: true, allowed_origins: ["https://app.example.com"], allow_credentials: true}

Coverage: kong.py: 8% → 37% (improved by 29%)

📖 Detail-Dokumentation: docs/import/kong.md

📦 Feature 3: APISIX Import (JSON/YAML Parser)¶

Status: ✅ IMPLEMENTED | Effort: 1 Woche | Release: v1.3.0-alpha2 | Commit: 4378d95

✅ Implementation Summary¶

Provider Implementation: gal/providers/apisix.py:904-1292 (~390 lines, 15 helper methods)

class APISIXProvider(Provider):
    def parse(self, provider_config: str) -> Config:
        """Parse APISIX JSON/YAML configuration to GAL format.

        APISIX supports both etcd and standalone (config file) mode.
        This parser handles standalone config files.
        """
        # Try YAML first, then JSON
        apisix_config = yaml.safe_load(provider_config) or json.loads(provider_config)

        # Create default global config (APISIX HTTP port 9080)
        global_config = GlobalConfig(host="0.0.0.0", port=9080, timeout="60s")

        return Config(
            version="1.0",
            provider="apisix",
            global_config=global_config,
            services=self._parse_services(apisix_config)
        )

Helper Methods (15 methods):

Service & Upstream Parsing: - _parse_services(): Orchestrates service parsing from APISIX config - _parse_service(): Converts APISIX service → GAL Service (ID-based linking) - _parse_upstream(): Parses APISIX upstream with nodes (dict format: {"host:port": weight}) - _map_lb_algorithm(): Maps APISIX LB algorithms to GAL - roundrobin → round_robin - chash (consistent hash) → ip_hash - ewma (exponentially weighted moving average) → least_conn - least_conn → least_conn

Health Checks: - _parse_health_check(): Parses active + passive health checks - Active: http_path, interval, timeout, healthy/unhealthy thresholds - Passive: outlier detection monitoring

Route & Plugin Parsing: - _parse_route(): Converts APISIX routes with URI and plugins

Rate Limiting (2 plugins): - _parse_limit_req_plugin(): Leaky bucket rate limiting - rate (requests per second), burst - _parse_limit_count_plugin(): Fixed window rate limiting - count/time_window → requests_per_second conversion

Authentication (with import warnings): - _parse_key_auth_plugin(): API Key authentication (header-based) - ⚠️ Warning: API keys not imported for security - _parse_basic_auth_plugin(): Basic authentication - ⚠️ Warning: User credentials not imported for security - _parse_jwt_auth_plugin(): JWT authentication - ⚠️ Warning: JWT secrets not imported for security

Header Manipulation: - _parse_proxy_rewrite_plugin(): Request header manipulation - _parse_response_rewrite_plugin(): Response header manipulation - _enrich_response_headers(): Merges response headers from multiple plugins

CORS: - _parse_cors_plugin(): Parses CORS config - origins, methods, headers, credentials, max_age - Handles comma-separated strings and wildcards

Utilities: - get_import_warnings(): Returns list of import warnings for user review

CLI Command: gal-cli.py:225-368 (already implemented)

gal import-config --provider apisix \
                  --input apisix.yaml \
                  --output gal-config.yaml

Tests: tests/test_import_apisix.py - 22 tests, all passing ✅

Test Coverage: - Basic Import (3 tests): Simple service, service+route, JSON format - Upstream (2 tests): Nodes with weights, all LB algorithms (parametrized) - Health Checks (3 tests): Active, passive, combined - Rate Limiting (2 tests): limit-req plugin, limit-count plugin with conversion - Authentication (3 tests): key-auth, basic-auth, JWT (all with warning checks) - Headers (2 tests): proxy-rewrite, response-rewrite plugins - CORS (1 test): Full CORS configuration - Multi-Service (1 test): 3 services with routes - Errors (3 tests): Invalid YAML, empty config, service without name - Combined (1 test): Production config with all features - Circuit Breaker (1 test): api-breaker warning generation

Supported Features: - ✅ Services & Upstreams (ID-based linking: service.upstream_id → upstream.id) - ✅ Nodes with weights ({"host:port": weight} dict format with rsplit parsing) - ✅ Load Balancing (4 algorithms: roundrobin, chash, ewma, least_conn) - ✅ Active Health Checks (http_path, interval, timeout, healthy/unhealthy successes/failures) - ✅ Passive Health Checks (outlier detection via checks.passive) - ✅ Rate Limiting (limit-req leaky bucket, limit-count fixed window with count/time_window → req/s) - ✅ API Key Authentication (header-based, with security warning) - ✅ Basic Authentication (with security warning for user credentials) - ✅ JWT Authentication (with security warning for secrets) - ✅ Request Header Transformation (proxy-rewrite plugin) - ✅ Response Header Transformation (response-rewrite plugin) - ✅ CORS (origins, methods, headers, credentials, max_age with wildcard support) - ✅ Circuit Breaker warning (api-breaker plugin detection) - ✅ Multiple Services & Routes - ✅ YAML & JSON format support

Import Warnings: - ⚠️ API keys not imported (security) - configure in APISIX consumers - ⚠️ Basic auth user credentials not imported (security) - configure in consumers - ⚠️ JWT secrets not imported (security) - configure manually - ⚠️ Circuit breaker plugin requires manual review

Example Input/Output:

# Input: apisix.yaml
services:
  - id: api_service
    name: api_service
    upstream_id: api_upstream

upstreams:
  - id: api_upstream
    type: roundrobin
    nodes:
      "api-1:8080": 100
      "api-2:8080": 100
    checks:
      active:
        http_path: /health
        interval: 10
        healthy:
          successes: 2
        unhealthy:
          http_failures: 3

routes:
  - id: api_route
    uri: /api/v1
    methods: [GET, POST]
    service_id: api_service
    plugins:
      limit-req:
        rate: 100
        burst: 200
      key-auth:
        header: apikey

# Output: gal-config.yaml
services:
- name: api_service
  type: rest
  protocol: http
  upstream:
    targets:
    - {host: api-1, port: 8080, weight: 100}
    - {host: api-2, port: 8080, weight: 100}
    load_balancer: {algorithm: round_robin}
    health_check:
      active:
        enabled: true
        http_path: /health
        interval: 10s
        unhealthy_threshold: 3
        healthy_threshold: 2
  routes:
  - path_prefix: /api/v1
    methods: [GET, POST]
    rate_limit:
      enabled: true
      requests_per_second: 100
      burst: 200
      key_type: ip_address
    authentication:
      enabled: true
      type: api_key
      api_key: {keys: [], key_name: apikey, in_location: header}

Coverage: apisix.py: 8% → 33% (improved by 25%)

📖 Detail-Dokumentation: docs/import/apisix.md

📦 Feature 4: Traefik Import (YAML Parser)¶

Status: ✅ IMPLEMENTED | Effort: 1 Woche | Release: v1.3.0-alpha2 | Commit: TBD

✅ Implementation Summary¶

Provider Implementation: gal/providers/traefik.py:662-978 (~312 lines, 10 helper methods)

class TraefikProvider(Provider):
    def parse(self, provider_config: str) -> Config:
        """Parse Traefik YAML configuration to GAL format.

        Traefik has static config (entrypoints, providers) and
        dynamic config (routers, services, middlewares). This parser
        handles dynamic config files.
        """
        traefik_config = yaml.safe_load(provider_config)

        # Traefik structure: http.routers, http.services, http.middlewares
        http_config = traefik_config.get("http", {})

        # Create default global config
        global_config = GlobalConfig(host="0.0.0.0", port=80, timeout="30s")

        return Config(
            version="1.0",
            provider="traefik",
            global_config=global_config,
            services=self._parse_services(traefik_config)
        )

Helper Methods (10 methods):

Service Parsing: - _parse_services(): Orchestrates service parsing from Traefik config - _parse_service(): Converts Traefik service → GAL Service (from loadBalancer.servers) - _parse_health_check(): Extracts passive health checks (Traefik OSS limitation) - ⚠️ Warning: Traefik OSS only supports passive health checks

Router & Route Parsing: - _parse_router(): Converts Traefik router to GAL route with middleware parsing - _extract_path_from_rule(): Extracts path from Traefik rule matchers - Supports: PathPrefix(\/api`),Path(`/exact`),Host(`...`) && PathPrefix(`...`)`

Middleware Parsing: - _parse_rate_limit_middleware(): Converts rateLimit middleware - average (per second) → requests_per_second - burst → burst - _parse_basic_auth_middleware(): Basic auth middleware - ⚠️ Warning: Users are hashed - configure manually in GAL - _parse_headers_middleware(): Request/response header manipulation - customRequestHeaders → request_add - customResponseHeaders → response_add

CORS Extraction: - _extract_cors_from_headers(): Extracts CORS config from Access-Control-* response headers - Parses: Allow-Origin, Allow-Methods, Allow-Headers, Allow-Credentials, Max-Age - Removes CORS headers from response_add after extraction

Utilities: - get_import_warnings(): Returns list of import warnings for user review

CLI Command: gal-cli.py:225-368 (already implemented)

gal import-config --provider traefik \
                  --input traefik.yaml \
                  --output gal-config.yaml

Tests: tests/test_import_traefik.py - 24 tests, all passing ✅

Test Coverage: - TestTraefikImportBasic (3 tests): Simple service, service+router, multiple servers - TestTraefikImportRouters (3 tests): PathPrefix, exact Path, complex rules with Host - TestTraefikImportHealthChecks (1 test): Health check with OSS limitation warning - TestTraefikImportStickySession (2 tests): Sticky sessions with custom/default cookie name - TestTraefikImportRateLimiting (1 test): rateLimit middleware - TestTraefikImportAuthentication (1 test): basicAuth middleware with warning - TestTraefikImportHeaders (2 tests): Request headers, response headers - TestTraefikImportCORS (2 tests): CORS extraction from headers, wildcard origins - TestTraefikImportMultiService (1 test): 3 services with routers - TestTraefikImportMultipleMiddlewares (1 test): Multiple middlewares on one route - TestTraefikImportErrors (5 tests): Invalid YAML, empty config, no services, incomplete service/router - TestTraefikImportWarnings (1 test): Path manipulation middleware warning - TestTraefikImportCombined (1 test): Production config with all features

Supported Features: - ✅ Services & Routers (http.services.loadBalancer.servers → GAL services) - ✅ Load Balancer (servers with URL parsing: http://host:port) - ✅ Health Checks (passive only - Traefik OSS limitation) - ✅ Sticky Sessions (cookie-based with custom names) - ✅ Load Balancing (round_robin default) - ✅ Rate Limiting (rateLimit middleware: average, burst) - ✅ Basic Authentication (basicAuth middleware with hashed users warning) - ✅ Request Header Manipulation (customRequestHeaders) - ✅ Response Header Manipulation (customResponseHeaders) - ✅ CORS (extracted from Access-Control-* response headers) - ✅ Multiple Services & Routes - ✅ Router Rule Parsing (PathPrefix, Path, Host combinations) - ✅ Multiple Middlewares per Route

Import Warnings: - ⚠️ Traefik OSS only supports passive health checks - config may be simplified - ⚠️ Basic auth users are hashed - configure manually in GAL - ⚠️ Path manipulation middleware not imported (addPrefix, stripPrefix)

Example Input/Output:

# Input: traefik.yaml
http:
  routers:
    api-router:
      rule: PathPrefix(`/api/v1`)
      service: api-service
      middlewares:
        - rate-limit
        - cors-headers

  services:
    api-service:
      loadBalancer:
        servers:
          - url: http://api-1:8080
          - url: http://api-2:8080
        healthCheck:
          path: /health
          interval: 10s
          timeout: 5s
        sticky:
          cookie:
            name: lb

  middlewares:
    rate-limit:
      rateLimit:
        average: 100
        burst: 200
    cors-headers:
      headers:
        customResponseHeaders:
          Access-Control-Allow-Origin: "https://app.example.com"
          Access-Control-Allow-Methods: "GET,POST,PUT,DELETE"
          Access-Control-Allow-Credentials: "true"
          Access-Control-Max-Age: "86400"

# Output: gal-config.yaml
services:
- name: api-service
  type: rest
  protocol: http
  upstream:
    targets:
    - {host: api-1, port: 8080}
    - {host: api-2, port: 8080}
    load_balancer:
      algorithm: round_robin
      sticky_sessions: true
      cookie_name: lb
    health_check:
      passive:
        enabled: true
        max_failures: 3
  routes:
  - path_prefix: /api/v1
    rate_limit:
      enabled: true
      requests_per_second: 100
      burst: 200
      key_type: ip_address
    cors:
      enabled: true
      allowed_origins: ["https://app.example.com"]
      allowed_methods: ["GET", "POST", "PUT", "DELETE"]
      allow_credentials: true
      max_age: "86400"

Coverage: traefik.py: 6% → 32% (improved by 26%)

📖 Detail-Dokumentation: docs/import/traefik.md

📦 Feature 5: Nginx Import (Custom Parser)¶

Status: ✅ IMPLEMENTED | Effort: 2 Wochen | Release: v1.3.0-beta1 | Commit: TBD

✅ Implementation Summary¶

Provider Implementation: gal/providers/nginx.py:829-1280 (~450 lines, 11 helper methods)

class NginxProvider(Provider):
    def parse(self, provider_config: str) -> Config:
        """Parse Nginx configuration to GAL format.

        Parses nginx.conf format with custom regex-based parser.
        Extracts upstreams, servers, locations, and directives.
        """
        # Remove comments
        config_text = self._remove_comments(provider_config)

        # Extract http block
        http_block = self._extract_http_block(config_text)

        # Parse upstreams
        upstreams = self._parse_upstreams(http_block)

        # Parse rate limiting zones
        rate_limit_zones = self._parse_rate_limit_zones(http_block)

        # Parse servers with locations
        services = self._parse_servers(http_block, upstreams, rate_limit_zones)

        return Config(
            version="1.0",
            provider="nginx",
            global_config=GlobalConfig(host="0.0.0.0", port=80, timeout="60s"),
            services=services,
        )

Helper Methods (11 methods):

Parsing Infrastructure: - _remove_comments(): Removes # comments from nginx.conf - _extract_http_block(): Extracts http {} block using brace counting - _extract_blocks(): Generic block extraction with brace counting - _extract_location_blocks(): Extracts location blocks with paths

Upstream & Server Parsing: - _parse_upstreams(): Parses upstream blocks → targets, algorithms - Algorithms: round_robin (default), least_conn, ip_hash - Server weights and passive health check parameters (max_fails, fail_timeout) - _parse_rate_limit_zones(): Parses limit_req_zone directives - Converts r/s, r/m, r/h, r/d to requests_per_second - _parse_servers(): Orchestrates server block parsing - _parse_server_block(): Parses single server with locations

Route & Feature Parsing: - _parse_location_block(): Parses location → Route with features - Rate limiting: limit_req zone + burst - Basic auth: auth_basic (htpasswd warning) - Headers: proxy_set_header, add_header - CORS: Extracted from Access-Control-* headers - _parse_headers(): Parses proxy_set_header and add_header directives - _extract_cors_from_headers(): Extracts CORS config from response headers

CLI Command: gal-cli.py:225-368 (already implemented)

gal import-config --provider nginx \
                  --input nginx.conf \
                  --output gal-config.yaml

Tests: tests/test_import_nginx.py - 18 tests, all passing ✅

Test Coverage: - TestNginxImportBasic (3 tests): Simple upstream, multiple servers, comments - TestNginxImportLoadBalancing (3 tests): round_robin, least_conn, ip_hash - TestNginxImportHealthChecks (1 test): Passive health check parameters - TestNginxImportRateLimiting (2 tests): Per second, per minute conversion - TestNginxImportAuthentication (1 test): Basic auth with htpasswd warning - TestNginxImportHeaders (2 tests): Request headers (proxy_set_header), response headers (add_header) - TestNginxImportCORS (2 tests): CORS extraction from headers, wildcard origins - TestNginxImportMultipleLocations (1 test): Multiple location blocks in server - TestNginxImportErrors (2 tests): Empty config, no http block - TestNginxImportCombined (1 test): Production config with all features

Supported Features: - ✅ Upstream Blocks (servers with host:port) - ✅ Load Balancing (round_robin, least_conn, ip_hash, weighted) - ✅ Passive Health Checks (max_fails, fail_timeout) - ✅ Rate Limiting (limit_req_zone with r/s, r/m, r/h, r/d conversion) - ✅ Basic Authentication (auth_basic with htpasswd warning) - ✅ Request Header Manipulation (proxy_set_header) - ✅ Response Header Manipulation (add_header) - ✅ CORS (extracted from Access-Control-* response headers) - ✅ Multiple Location Blocks per Server - ✅ Comment Removal - ✅ Nested Block Parsing (brace counting)

Import Warnings: - ⚠️ Basic auth detected - htpasswd file not imported (configure manually)

Example Input/Output:

# Input: nginx.conf
events {}

http {
    limit_req_zone $binary_remote_addr zone=api_rate:10m rate=100r/s;

    upstream upstream_api {
        least_conn;
        server api-1:8080 weight=2 max_fails=3 fail_timeout=30s;
        server api-2:8080;
    }

    server {
        listen 80;

        location /api/v1 {
            limit_req zone=api_rate burst=200;

            proxy_set_header X-Real-IP $remote_addr;
            add_header Access-Control-Allow-Origin "https://app.example.com";
            add_header Access-Control-Allow-Credentials "true";

            proxy_pass http://upstream_api;
        }
    }
}

# Output: gal-config.yaml
services:
- name: api
  type: rest
  protocol: http
  upstream:
    targets:
    - {host: api-1, port: 8080, weight: 2}
    - {host: api-2, port: 8080}
    load_balancer:
      algorithm: least_conn
    health_check:
      passive:
        enabled: true
        max_failures: 3
  routes:
  - path_prefix: /api/v1
    rate_limit:
      enabled: true
      requests_per_second: 100
      burst: 200
      key_type: ip_address
    headers:
      request_add:
        X-Real-IP: $remote_addr
    cors:
      enabled: true
      allowed_origins: ["https://app.example.com"]
      allow_credentials: true

Coverage: nginx.py: 6% → 38% (improved by 32%)

📖 Detail-Dokumentation: docs/import/nginx.md

📦 Feature 6: HAProxy Import (Custom Parser)¶

Status: ✅ Completed | Effort: 2 Wochen | Release: v1.3.0-beta2

Scope¶

Parse HAProxy haproxy.cfg (non-YAML!) → GAL Config

Challenge: HAProxy config ist section-based format!

Lösung: Custom Parser (simpler als Nginx - section-basiert)

Mapping: - frontend → Routing ACLs → GAL routes[] - backend → Servers → GAL services[], upstream.targets[] - balance → GAL load_balancer.algorithm (roundrobin, leastconn, source, uri, hdr) - option httpchk → GAL health_check.active - cookie → GAL load_balancer.sticky_sessions - http-request set-header → GAL transformation.headers

Implementation:

from gal.parsers.haproxy_parser import HAProxyConfigParser, SectionType

class HAProxyProvider(Provider):
    def parse(self, provider_config: str) -> Config:
        parser = HAProxyConfigParser()
        sections = parser.parse(provider_config)

        global_config = self._parse_global(sections)
        services = self._parse_services(sections)

        return Config(
            version="1.0",
            provider="haproxy",
            global_config=global_config,
            services=services
        )

Custom Parser: gal/parsers/haproxy_parser.py (235 lines)

class HAProxyConfigParser:
    """Parse haproxy.cfg section-based format."""

    def parse(self, config_text: str) -> List[HAProxySection]:
        sections = []
        current_section = None

        for line in self._preprocess(config_text):
            if line.startswith("frontend"):
                current_section = HAProxySection(type=SectionType.FRONTEND, ...)
            elif line.startswith("backend"):
                current_section = HAProxySection(type=SectionType.BACKEND, ...)
            else:
                current_section.directives.append(self._parse_directive(line))

        return sections

CLI Command: gal-cli.py:225-368 (already implemented)

gal import-config --provider haproxy \
                  --input haproxy.cfg \
                  --output gal-config.yaml

Tests: tests/test_import_haproxy.py - 28 tests, all passing ✅

Test Coverage: - TestHAProxyParserBasic (9 tests): Empty config, global, defaults, frontend, backend, listen, multiple sections, comments - TestHAProxyImportBasic (5 tests): Simple backend, multiple servers, multiple backends, listen section, global config - TestHAProxyImportLoadBalancing (4 tests): roundrobin, leastconn, source, uri algorithms - TestHAProxyImportHealthChecks (3 tests): Simple httpchk, httpchk with path, http-check v2.0+ - TestHAProxyImportStickySessions (1 test): Cookie-based sticky sessions - TestHAProxyImportHeaders (1 test): http-request set-header - TestHAProxyImportRouting (2 tests): Path-based routing with ACLs, default_backend - TestHAProxyImportEdgeCases (3 tests): Backend without servers, unnamed sections, invalid servers - TestHAProxyImportComplex (1 test): Production-like multi-backend config

Supported Features: - ✅ Frontends & Backends (section-based parsing) - ✅ Listen Sections (combined frontend+backend) - ✅ Load Balancing (roundrobin → round_robin, leastconn → least_connections, source → ip_hash, uri → uri_hash) - ✅ Health Checks (option httpchk, http-check v2.0+) - ✅ Sticky Sessions (cookie-based with custom names) - ✅ Server Weights (weight parameter) - ✅ Header Manipulation (http-request set-header → transformation.headers) - ✅ Routing ACLs (path_beg → routes with path_prefix) - ✅ Global Config (defaults, bind addresses) - ✅ Multiple Services & Routes

Parser Coverage: 88% (97 statements, 12 missed)

Example Input/Output:

# Input: haproxy.cfg
frontend http_front
    bind *:80
    use_backend api_backend if { path_beg /api }
    default_backend app_backend

backend api_backend
    balance roundrobin
    option httpchk GET /health
    http-request set-header X-Backend api
    server api1 api1.internal:8080 check weight 2
    server api2 api2.internal:8080 check weight 1

backend app_backend
    balance source
    cookie APPID insert indirect
    server app1 app1.internal:8080 check cookie app1
    server app2 app2.internal:8080 check cookie app2

# Output: gal-config.yaml
services:
- name: api_backend
  type: rest
  protocol: http
  upstream:
    targets:
    - {host: api1.internal, port: 8080, weight: 2}
    - {host: api2.internal, port: 8080, weight: 1}
    health_check:
      active:
        enabled: true
        http_path: /health
        interval: 10s
        timeout: 5s
    load_balancer:
      algorithm: round_robin
  routes:
  - path_prefix: /api
- name: app_backend
  type: rest
  protocol: http
  upstream:
    targets:
    - {host: app1.internal, port: 8080}
    - {host: app2.internal, port: 8080}
    load_balancer:
      algorithm: ip_hash
      sticky_sessions: true
      cookie_name: APPID
  routes:
  - path_prefix: /

Files Created: - gal/parsers/__init__.py (9 lines) - gal/parsers/haproxy_parser.py (235 lines) - Custom section-based parser - gal/providers/haproxy.py (+407 lines) - parse() implementation - tests/test_import_haproxy.py (560+ lines) - Comprehensive test suite - examples/haproxy/haproxy.cfg (197 lines) - Production-like example - examples/haproxy/simple-haproxy.cfg (35 lines) - Simple example

📖 Detail-Dokumentation: docs/import/haproxy.md

✅ Feature 7: Compatibility Checker & Comparison¶

Status: 🔄 Pending | Effort: 2 Wochen | Release: v1.3.0-rc1 | Dependencies: Features 1-6

Motivation¶

Nach Import muss der Nutzer wissen: - Funktioniert die GAL-Config auf dem Ziel-Provider? - Welche Features werden unterstützt? - Welcher Provider ist am besten geeignet?

CLI Commands¶

Check Compatibility:

gal validate --config gal-config.yaml --target-provider haproxy

# Output:
# ✓ Config is compatible with HAProxy
# ⚠ Warnings:
#   - JWT authentication requires Lua scripting
#   - Active health checks fully supported
#
# Compatibility: 95% (19/20 features supported)

Compare Providers:

gal compare --config gal-config.yaml --providers envoy,kong,nginx,haproxy

# Output (table):
# Feature           | Envoy | Kong | Nginx | HAProxy
# ------------------|-------|------|-------|--------
# Rate Limiting     | ✅    | ✅   | ✅    | ✅
# JWT Auth          | ✅    | ✅   | ⚠️    | ⚠️
# Active HC         | ✅    | ✅   | ❌    | ✅
# Load Balancing    | ✅    | ✅   | ✅    | ✅
#
# Recommendation: Use Envoy or Kong for full compatibility

Implementation¶

File: gal/compatibility.py

class CompatibilityChecker:
    """Check config compatibility with providers."""

    def check_provider(self, config: Config, target_provider: str) -> CompatibilityReport:
        """Check if config works on target provider."""
        provider = get_provider(target_provider)

        report = CompatibilityReport(
            provider=target_provider,
            compatible=True,
            features_supported=[],
            features_unsupported=[],
            warnings=[]
        )

        # Check each feature
        for service in config.services:
            self._check_service_features(service, provider, report)

        return report

    def compare_providers(self, config: Config, providers: List[str]) -> Dict[str, CompatibilityReport]:
        """Compare config compatibility across providers."""
        results = {}
        for provider_name in providers:
            results[provider_name] = self.check_provider(config, provider_name)
        return results

Tests: 40+ tests für Compatibility Checking, Provider Comparison

📖 Detail-Dokumentation: docs/import/compatibility.md

🔀 Feature 8: Migration Assistant (Interactive CLI)¶

Status: ✅ Done | Effort: 2 Wochen | Release: v1.3.0 Final | Dependencies: Features 1-7 | Tests: 31/31 (100%)

Motivation¶

Migration sollte geführt, einfach und sicher sein: - Interaktive Prompts - Automatische Validierung - Migration Report (Markdown) - Recommendations & Next Steps

Interactive Workflow¶

gal migrate

# Interactive prompts:
? Source Provider: nginx
? Source Config: /etc/nginx/nginx.conf
? Target Provider: haproxy
? Output Directory: ./migration/

[1/5] Reading Nginx config...
[2/5] Parsing and analyzing...
[3/5] Converting to GAL format...
[4/5] Validating compatibility with HAProxy...
[5/5] Generating HAProxy config...

✓ Migration complete!

Files created:
  - ./migration/gal-config.yaml (GAL format)
  - ./migration/haproxy.cfg (HAProxy config)
  - ./migration/migration-report.md (Migration report)

Compatibility: 95% (19/20 features)
Warnings: 2
  - JWT auth requires Lua (see docs)
  - Passive health checks use fall/rise thresholds

Next steps:
  1. Review migration-report.md
  2. Test haproxy.cfg in staging
  3. Deploy to production

Migration Report Format¶

File: migration/migration-report.md

# Migration Report: Nginx → HAProxy

**Date:** 2026-04-15
**Source:** /etc/nginx/nginx.conf
**Target:** HAProxy 2.8

## Summary

- **Compatibility:** 95% (19/20 features)
- **Services Migrated:** 3
- **Routes Migrated:** 12
- **Warnings:** 2

## Features Migrated

✅ **Load Balancing**
- Algorithm: Round Robin → roundrobin
- Targets: 6 backends

✅ **Rate Limiting**
- IP-based: 100 req/s
- Converted to stick-table

⚠️ **Authentication**
- Basic Auth: ✅ Supported
- JWT Auth: ⚠️ Requires Lua scripting

## Warnings & Recommendations

1. **JWT Authentication**
   - Nginx uses OpenResty/Lua
   - HAProxy requires Lua scripting or external auth
   - **Recommendation:** Use Kong or Envoy for native JWT

2. **Passive Health Checks**
   - Nginx: max_fails, fail_timeout
   - HAProxy: fall, rise thresholds
   - **Action:** Review and adjust thresholds

## Testing Checklist

- [ ] Test in staging environment
- [ ] Verify all 12 routes
- [ ] Check load balancing distribution
- [ ] Validate rate limiting behavior
- [ ] Monitor backend health
- [ ] Performance comparison

## Next Steps

1. ✅ Review this report
2. ⏳ Test in staging
3. ⏳ Adjust JWT authentication
4. ⏳ Deploy to production
5. ⏳ Monitor and validate

Tests: 30+ tests für Interactive Workflow, Report Generation

📖 Detail-Dokumentation: docs/import/migration.md

🗓️ Timeline (12 Wochen)¶

Phase 1: YAML Parsers (Weeks 1-4) → v1.3.0-alpha1, alpha2¶

Week 1: Feature 1 - Envoy Import + Shared Infrastructure
Week 2: Feature 2 - Kong Import → Release v1.3.0-alpha1
Week 3: Feature 3 - APISIX Import
Week 4: Feature 4 - Traefik Import → Release v1.3.0-alpha2

Phase 2: Custom Parsers (Weeks 5-8) → v1.3.0-beta1, beta2¶

Weeks 5-6: Feature 5 - Nginx Import (Custom Parser) → Release v1.3.0-beta1
Weeks 7-8: Feature 6 - HAProxy Import (Custom Parser) → Release v1.3.0-beta2

Phase 3: Compatibility & Migration (Weeks 9-12) → v1.3.0-rc1, Final¶

Weeks 9-10: Feature 7 - Compatibility Checker → Release v1.3.0-rc1
Weeks 11-12: Feature 8 - Migration Assistant → Release v1.3.0 Final

🎯 Use Cases¶

Use Case 1: Nginx → HAProxy Migration¶

Scenario: E-Commerce mit Nginx möchte zu HAProxy wechseln.

# 1. Import Nginx config
gal import --provider nginx --input /etc/nginx/nginx.conf --output gal-config.yaml

# 2. Check compatibility
gal validate --config gal-config.yaml --target-provider haproxy

# 3. Generate HAProxy config
gal generate --config gal-config.yaml --provider haproxy --output haproxy.cfg

Use Case 2: Kong → Envoy Migration¶

Scenario: Startup mit Kong möchte zu Envoy für Service Mesh.

# Interactive migration
gal migrate
# > Source: kong
# > Target: envoy
# > Creates migration report

Use Case 3: Multi-Provider Deployment¶

Scenario: Großunternehmen will gleiche Config auf verschiedenen Providern.

# 1. Import production HAProxy config
gal import --provider haproxy --input haproxy-prod.cfg --output gal-config.yaml

# 2. Generate for all providers
gal generate-all --config gal-config.yaml

# Result: envoy.yaml, kong.yaml, apisix.json, traefik.yaml, nginx.conf, haproxy.cfg

📊 Success Metrics - ✅ ACHIEVED¶

Deliverables (100% Complete)¶

Code: - ✅ Provider Interface Extension (parse method) - ✅ 6 Provider Parser (envoy, kong, apisix, traefik, nginx, haproxy) - ✅ 2 Custom Parsers (nginx_parser.py 237 lines, haproxy_parser.py 235 lines) - ✅ CLI Commands: import-config, check-compatibility, compare-providers, migrate - ✅ Compatibility Checker (compatibility.py 601 lines, 86% coverage) - ✅ Tests: 185 tests (15+21+22+24+18+28+26+31) - All Passing ✅

Documentation: - ✅ docs/import/compatibility.md (550+ lines, German) - ✅ docs/import/migration.md (325 lines, German) - ✅ Import Guides pro Provider (6 × 800+ lines = 4800+ lines total) - ✅ Feature Coverage Tables (3540+ lines in provider guides) - ✅ Migration Examples & Use Cases

Examples: - ✅ examples/haproxy/ (2 configs: haproxy.cfg, simple-haproxy.cfg) - ✅ Migration Workflows (all 36 provider combinations supported)

Coverage Achieved¶

Parser Coverage: 88% für Custom Parsers (nginx, haproxy)
Feature Mapping: 90%+ der Core Features
Test Coverage: 549 Total Tests (v1.2.0: 364 → +185 new tests)
Code Coverage: 89% overall (maintained from v1.2.0)

Statistics¶

6 Import Guides: 4800+ lines documentation
2 Feature Docs: 875+ lines (compatibility.md, migration.md)
Provider Feature Coverage: 3540+ lines in 6 provider guides
Total Documentation: 9200+ lines new documentation

✅ Release Complete¶

Released: 2025-10-19 Final Status: All 8 Features Implemented & Tested Mission: Provider Lock-in brechen - ✅ ACCOMPLISHED

Release Milestones (All Complete)¶

✅ v1.3.0-alpha1 (Envoy + Kong Import)
✅ v1.3.0-alpha2 (+ APISIX + Traefik Import)
✅ v1.3.0-beta1 (+ Nginx Import)
✅ v1.3.0-beta2 (+ HAProxy Import)
✅ v1.3.0-rc1 (+ Compatibility Checker)
✅ v1.3.0 Final (+ Migration Assistant)

Links¶

GitHub Release: https://github.com/pt9912/x-gal/releases/tag/v1.3.0
PyPI: https://pypi.org/project/gal-gateway/1.3.0/
Docker: ghcr.io/pt9912/x-gal:v1.3.0

Next Milestone: v1.4.0 (Q3 2026) - Advanced Traffic & Multi-Cloud + gRPC Transformations

GAL v1.3.0 - Implementierungsplan¶

🎯 Mission¶

Vision¶

📋 Feature Overview¶

🎯 Shared Infrastructure (All Features)¶

Provider Interface Extension¶

CLI Command: gal import¶

Feature Mapping Matrix¶

📦 Feature 1: Envoy Import (YAML Parser)¶

✅ Implementation Summary¶

📦 Feature 2: Kong Import (YAML/JSON Parser)¶

✅ Implementation Summary¶

📦 Feature 3: APISIX Import (JSON/YAML Parser)¶

✅ Implementation Summary¶

📦 Feature 4: Traefik Import (YAML Parser)¶

✅ Implementation Summary¶

📦 Feature 5: Nginx Import (Custom Parser)¶

✅ Implementation Summary¶

📦 Feature 6: HAProxy Import (Custom Parser)¶

Scope¶

✅ Feature 7: Compatibility Checker & Comparison¶

Motivation¶

CLI Commands¶

Implementation¶

🔀 Feature 8: Migration Assistant (Interactive CLI)¶

Motivation¶

Interactive Workflow¶

Migration Report Format¶

🗓️ Timeline (12 Wochen)¶

Phase 1: YAML Parsers (Weeks 1-4) → v1.3.0-alpha1, alpha2¶

Phase 2: Custom Parsers (Weeks 5-8) → v1.3.0-beta1, beta2¶

Phase 3: Compatibility & Migration (Weeks 9-12) → v1.3.0-rc1, Final¶

🎯 Use Cases¶

Use Case 1: Nginx → HAProxy Migration¶

Use Case 2: Kong → Envoy Migration¶

Use Case 3: Multi-Provider Deployment¶

📊 Success Metrics - ✅ ACHIEVED¶

Deliverables (100% Complete)¶

Coverage Achieved¶

Statistics¶

✅ Release Complete¶

Release Milestones (All Complete)¶

Links¶

CLI Command: `gal import`¶