Configuration override from environment variable (#47)

* Add environment variable override for config fields

Introduces functions to override configuration fields from environment variables, allowing dynamic configuration without modifying YAML files. The environment variable names are generated from field names, and type conversion is handled for int, float, and tuple fields.

* update chart version to 0.1.4

* Update README.md to enhance environment variable configuration details and improve overall clarity
This commit is contained in:
Lorenzo Venerandi
2026-01-23 17:34:23 +01:00
committed by GitHub
parent e1444e44ee
commit 223883a781
3 changed files with 401 additions and 326 deletions

694
README.md
View File

@@ -1,323 +1,371 @@
<h1 align="center">🕷️ Krawl</h1>
<h3 align="center">
<a name="readme-top"></a>
<img
src="img/krawl-logo.jpg"
height="200"
>
</h3>
<div align="center">
<p align="center">
A modern, customizable zero-dependencies honeypot server designed to detect and track malicious activity through deceptive web pages, fake credentials, and canary tokens.
</p>
<div align="center">
<a href="https://github.com/blessedrebus/krawl/blob/main/LICENSE">
<img src="https://img.shields.io/github/license/blessedrebus/krawl" alt="License">
</a>
<a href="https://github.com/blessedrebus/krawl/releases">
<img src="https://img.shields.io/github/v/release/blessedrebus/krawl" alt="Release">
</a>
</div>
<div align="center">
<a href="https://ghcr.io/blessedrebus/krawl">
<img src="https://img.shields.io/badge/ghcr.io-krawl-blue" alt="GitHub Container Registry">
</a>
<a href="https://kubernetes.io/">
<img src="https://img.shields.io/badge/kubernetes-ready-326CE5?logo=kubernetes&logoColor=white" alt="Kubernetes">
</a>
<a href="https://github.com/BlessedRebuS/Krawl/pkgs/container/krawl-chart">
<img src="https://img.shields.io/badge/helm-chart-0F1689?logo=helm&logoColor=white" alt="Helm Chart">
</a>
</div>
<br>
<p align="center">
<a href="#what-is-krawl">What is Krawl?</a> •
<a href="#-quick-start">Quick Start</a> •
<a href="#honeypot-pages">Honeypot Pages</a> •
<a href="#dashboard">Dashboard</a> •
<a href="./ToDo.md">Todo</a> •
<a href="#-contributing">Contributing</a>
</p>
<br>
</div>
## Demo
Tip: crawl the `robots.txt` paths for additional fun
### Krawl URL: [http://demo.krawlme.com](http://demo.krawlme.com)
### View the dashboard [http://demo.krawlme.com/das_dashboard](http://demo.krawlme.com/das_dashboard)
## What is Krawl?
**Krawl** is a cloudnative deception server designed to detect, delay, and analyze malicious web crawlers and automated scanners.
It creates realistic fake web applications filled with lowhanging fruit such as admin panels, configuration files, and exposed fake credentials to attract and identify suspicious activity.
By wasting attacker resources, Krawl helps clearly distinguish malicious behavior from legitimate crawlers.
It features:
- **Spider Trap Pages**: Infinite random links to waste crawler resources based on the [spidertrap project](https://github.com/adhdproject/spidertrap)
- **Fake Login Pages**: WordPress, phpMyAdmin, admin panels
- **Honeypot Paths**: Advertised in robots.txt to catch scanners
- **Fake Credentials**: Realistic-looking usernames, passwords, API keys
- **[Canary Token](#customizing-the-canary-token) Integration**: External alert triggering
- **Real-time Dashboard**: Monitor suspicious activity
- **Customizable Wordlists**: Easy JSON-based configuration
- **Random Error Injection**: Mimic real server behavior
![asd](img/deception-page.png)
## 🚀 Quick Start
## Helm Chart
Install with default values
```bash
helm install krawl oci://ghcr.io/blessedrebus/krawl-chart \
--namespace krawl-system \
--create-namespace
```
Install with custom [canary token](#customizing-the-canary-token)
```bash
helm install krawl oci://ghcr.io/blessedrebus/krawl-chart \
--namespace krawl-system \
--create-namespace \
--set config.canaryTokenUrl="http://your-canary-token-url"
```
To access the deception server
```bash
kubectl get svc krawl -n krawl-system
```
Once the EXTERNAL-IP is assigned, access your deception server at:
```
http://<EXTERNAL-IP>:5000
```
## Kubernetes / Kustomize
Apply all manifests with
```bash
kubectl apply -f https://raw.githubusercontent.com/BlessedRebuS/Krawl/refs/heads/main/manifests/krawl-all-in-one-deploy.yaml
```
Retrieve dashboard path with
```bash
kubectl get secret krawl-server -n krawl-system -o jsonpath='{.data.dashboard-path}' | base64 -d
```
Or clone the repo and apply the `manifest` folder with
```bash
kubectl apply -k manifests
```
## Docker
Run Krawl as a docker container with
```bash
docker run -d \
-p 5000:5000 \
-e CANARY_TOKEN_URL="http://your-canary-token-url" \
--name krawl \
ghcr.io/blessedrebus/krawl:latest
```
## Docker Compose
Run Krawl with docker-compose in the project folder with
```bash
docker-compose up -d
```
Stop it with
```bash
docker-compose down
```
## Python 3.11+
Clone the repository
```bash
git clone https://github.com/blessedrebus/krawl.git
cd krawl/src
```
Run the server
```bash
python3 server.py
```
Visit
`http://localhost:5000`
To access the dashboard
`http://localhost:5000/<dashboard-secret-path>`
## Configuration via Environment Variables
To customize the deception server installation several **environment variables** can be specified.
| Variable | Description | Default |
|----------|-------------|---------|
| `PORT` | Server listening port | `5000` |
| `DELAY` | Response delay in milliseconds | `100` |
| `LINKS_MIN_LENGTH` | Minimum random link length | `5` |
| `LINKS_MAX_LENGTH` | Maximum random link length | `15` |
| `LINKS_MIN_PER_PAGE` | Minimum links per page | `10` |
| `LINKS_MAX_PER_PAGE` | Maximum links per page | `15` |
| `MAX_COUNTER` | Initial counter value | `10` |
| `CANARY_TOKEN_TRIES` | Requests before showing canary token | `10` |
| `CANARY_TOKEN_URL` | External canary token URL | None |
| `DASHBOARD_SECRET_PATH` | Custom dashboard path | Auto-generated |
| `PROBABILITY_ERROR_CODES` | Error response probability (0-100%) | `0` |
| `SERVER_HEADER` | HTTP Server header for deception | `Apache/2.2.22 (Ubuntu)` |
| `TIMEZONE` | IANA timezone for logs and dashboard (e.g., `America/New_York`, `Europe/Rome`) | System timezone |
## robots.txt
The actual (juicy) robots.txt configuration is the following
```txt
Disallow: /admin/
Disallow: /api/
Disallow: /backup/
Disallow: /config/
Disallow: /database/
Disallow: /private/
Disallow: /uploads/
Disallow: /wp-admin/
Disallow: /phpMyAdmin/
Disallow: /admin/login.php
Disallow: /api/v1/users
Disallow: /api/v2/secrets
Disallow: /.env
Disallow: /credentials.txt
Disallow: /passwords.txt
Disallow: /.git/
Disallow: /backup.sql
Disallow: /db_backup.sql
```
## Honeypot pages
Requests to common admin endpoints (`/admin/`, `/wp-admin/`, `/phpMyAdmin/`) return a fake login page. Any login attempt triggers a 1-second delay to simulate real processing and is fully logged in the dashboard (credentials, IP, headers, timing).
<div align="center">
<img src="img/admin-page.png" width="60%" />
</div>
Requests to paths like `/backup/`, `/config/`, `/database/`, `/private/`, or `/uploads/` return a fake directory listing populated with “interesting” files, each assigned a random file size to look realistic.
![directory-page](img/directory-page.png)
The `.env` endpoint exposes fake database connection strings, **AWS API keys**, and **Stripe secrets**. It intentionally returns an error due to the `Content-Type` being `application/json` instead of plain text, mimicking a “juicy” misconfiguration that crawlers and scanners often flag as information leakage.
![env-page](img/env-page.png)
The pages `/api/v1/users` and `/api/v2/secrets` show fake users and random secrets in JSON format
<div align="center">
<img src="img/api-users-page.png" width="45%" style="vertical-align: middle; margin: 0 10px;" />
<img src="img/api-secrets-page.png" width="45%" style="vertical-align: middle; margin: 0 10px;" />
</div>
The pages `/credentials.txt` and `/passwords.txt` show fake users and random secrets
<div align="center">
<img src="img/credentials-page.png" width="35%" style="vertical-align: middle; margin: 0 10px;" />
<img src="img/passwords-page.png" width="45%" style="vertical-align: middle; margin: 0 10px;" />
</div>
## Customizing the Canary Token
To create a custom canary token, visit https://canarytokens.org
and generate a “Web bug” canary token.
This optional token is triggered when a crawler fully traverses the webpage until it reaches 0. At that point, a URL is returned. When this URL is requested, it sends an alert to the user via email, including the visitors IP address and user agent.
To enable this feature, set the canary token URL [using the environment variable](#configuration-via-environment-variables) `CANARY_TOKEN_URL`.
## Customizing the wordlist
Edit `wordlists.json` to customize fake data for your use case
```json
{
"usernames": {
"prefixes": ["admin", "root", "user"],
"suffixes": ["_prod", "_dev", "123"]
},
"passwords": {
"prefixes": ["P@ssw0rd", "Admin"],
"simple": ["test", "password"]
},
"directory_listing": {
"files": ["credentials.txt", "backup.sql"],
"directories": ["admin/", "backup/"]
}
}
```
or **values.yaml** in the case of helm chart installation
## Dashboard
Access the dashboard at `http://<server-ip>:<port>/<dashboard-path>`
The dashboard shows:
- Total and unique accesses
- Suspicious activity detection
- Top IPs, paths, and user-agents
- Real-time monitoring
The attackers' triggered honeypot path and the suspicious activity (such as failed login attempts) are logged
![dashboard-1](img/dashboard-1.png)
The top IP Addresses is shown along with top paths and User Agents
![dashboard-2](img/dashboard-2.png)
### Retrieving Dashboard Path
Check server startup logs or get the secret with
```bash
kubectl get secret krawl-server -n krawl-system \
-o jsonpath='{.data.dashboard-path}' | base64 -d && echo
```
## 🤝 Contributing
Contributions welcome! Please:
1. Fork the repository
2. Create a feature branch
3. Make your changes
4. Submit a pull request (explain the changes!)
<div align="center">
## ⚠️ Disclaimer
**This is a deception/honeypot system.**
Deploy in isolated environments and monitor carefully for security events.
Use responsibly and in compliance with applicable laws and regulations.
## Star History
<img src="https://api.star-history.com/svg?repos=BlessedRebuS/Krawl&type=Date" width="600" alt="Star History Chart" />
<h1 align="center">🕷️ Krawl</h1>
<h3 align="center">
<a name="readme-top"></a>
<img
src="img/krawl-logo.jpg"
height="200"
>
</h3>
<div align="center">
<p align="center">
A modern, customizable zero-dependencies honeypot server designed to detect and track malicious activity through deceptive web pages, fake credentials, and canary tokens.
</p>
<div align="center">
<a href="https://github.com/blessedrebus/krawl/blob/main/LICENSE">
<img src="https://img.shields.io/github/license/blessedrebus/krawl" alt="License">
</a>
<a href="https://github.com/blessedrebus/krawl/releases">
<img src="https://img.shields.io/github/v/release/blessedrebus/krawl" alt="Release">
</a>
</div>
<div align="center">
<a href="https://ghcr.io/blessedrebus/krawl">
<img src="https://img.shields.io/badge/ghcr.io-krawl-blue" alt="GitHub Container Registry">
</a>
<a href="https://kubernetes.io/">
<img src="https://img.shields.io/badge/kubernetes-ready-326CE5?logo=kubernetes&logoColor=white" alt="Kubernetes">
</a>
<a href="https://github.com/BlessedRebuS/Krawl/pkgs/container/krawl-chart">
<img src="https://img.shields.io/badge/helm-chart-0F1689?logo=helm&logoColor=white" alt="Helm Chart">
</a>
</div>
<br>
<p align="center">
<a href="#what-is-krawl">What is Krawl?</a> •
<a href="#-quick-start">Quick Start</a> •
<a href="#honeypot-pages">Honeypot Pages</a> •
<a href="#dashboard">Dashboard</a> •
<a href="./ToDo.md">Todo</a> •
<a href="#-contributing">Contributing</a>
</p>
<br>
</div>
## Demo
Tip: crawl the `robots.txt` paths for additional fun
### Krawl URL: [http://demo.krawlme.com](http://demo.krawlme.com)
### View the dashboard [http://demo.krawlme.com/das_dashboard](http://demo.krawlme.com/das_dashboard)
## What is Krawl?
**Krawl** is a cloudnative deception server designed to detect, delay, and analyze malicious web crawlers and automated scanners.
It creates realistic fake web applications filled with lowhanging fruit such as admin panels, configuration files, and exposed fake credentials to attract and identify suspicious activity.
By wasting attacker resources, Krawl helps clearly distinguish malicious behavior from legitimate crawlers.
It features:
- **Spider Trap Pages**: Infinite random links to waste crawler resources based on the [spidertrap project](https://github.com/adhdproject/spidertrap)
- **Fake Login Pages**: WordPress, phpMyAdmin, admin panels
- **Honeypot Paths**: Advertised in robots.txt to catch scanners
- **Fake Credentials**: Realistic-looking usernames, passwords, API keys
- **[Canary Token](#customizing-the-canary-token) Integration**: External alert triggering
- **Real-time Dashboard**: Monitor suspicious activity
- **Customizable Wordlists**: Easy JSON-based configuration
- **Random Error Injection**: Mimic real server behavior
![asd](img/deception-page.png)
## 🚀 Quick Start
## Helm Chart
Install with default values
```bash
helm install krawl oci://ghcr.io/blessedrebus/krawl-chart \
--namespace krawl-system \
--create-namespace
```
Install with custom [canary token](#customizing-the-canary-token)
```bash
helm install krawl oci://ghcr.io/blessedrebus/krawl-chart \
--namespace krawl-system \
--create-namespace \
--set config.canaryTokenUrl="http://your-canary-token-url"
```
To access the deception server
```bash
kubectl get svc krawl -n krawl-system
```
Once the EXTERNAL-IP is assigned, access your deception server at:
```
http://<EXTERNAL-IP>:5000
```
## Kubernetes / Kustomize
Apply all manifests with
```bash
kubectl apply -f https://raw.githubusercontent.com/BlessedRebuS/Krawl/refs/heads/main/manifests/krawl-all-in-one-deploy.yaml
```
Retrieve dashboard path with
```bash
kubectl get secret krawl-server -n krawl-system -o jsonpath='{.data.dashboard-path}' | base64 -d
```
Or clone the repo and apply the `manifest` folder with
```bash
kubectl apply -k manifests
```
## Docker
Run Krawl as a docker container with
```bash
docker run -d \
-p 5000:5000 \
-e CANARY_TOKEN_URL="http://your-canary-token-url" \
--name krawl \
ghcr.io/blessedrebus/krawl:latest
```
## Docker Compose
Run Krawl with docker-compose in the project folder with
```bash
docker-compose up -d
```
Stop it with
```bash
docker-compose down
```
## Python 3.11+
Clone the repository
```bash
git clone https://github.com/blessedrebus/krawl.git
cd krawl/src
```
Run the server
```bash
python3 server.py
```
Visit
`http://localhost:5000`
To access the dashboard
`http://localhost:5000/<dashboard-secret-path>`
## Configuration via Environment Variables
To customize the deception server installation, environment variables can be specified using the naming convention: `KRAWL_<FIELD_NAME>` where `<FIELD_NAME>` is the configuration field name in uppercase with special characters converted:
- `.``_`
- `-``__` (double underscore)
- ` ` (space) → `_`
### Configuration Variables
| Configuration Field | Environment Variable | Description | Default |
|-----------|-----------|-------------|---------|
| `port` | `KRAWL_PORT` | Server listening port | `5000` |
| `delay` | `KRAWL_DELAY` | Response delay in milliseconds | `100` |
| `server_header` | `KRAWL_SERVER_HEADER` | HTTP Server header for deception | `""` |
| `links_length_range` | `KRAWL_LINKS_LENGTH_RANGE` | Link length range as `min,max` | `5,15` |
| `links_per_page_range` | `KRAWL_LINKS_PER_PAGE_RANGE` | Links per page as `min,max` | `10,15` |
| `char_space` | `KRAWL_CHAR_SPACE` | Characters used for link generation | `abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789` |
| `max_counter` | `KRAWL_MAX_COUNTER` | Initial counter value | `10` |
| `canary_token_url` | `KRAWL_CANARY_TOKEN_URL` | External canary token URL | None |
| `canary_token_tries` | `KRAWL_CANARY_TOKEN_TRIES` | Requests before showing canary token | `10` |
| `dashboard_secret_path` | `KRAWL_DASHBOARD_SECRET_PATH` | Custom dashboard path | Auto-generated |
| `api_server_url` | `KRAWL_API_SERVER_URL` | API server URL | None |
| `api_server_port` | `KRAWL_API_SERVER_PORT` | API server port | `8080` |
| `api_server_path` | `KRAWL_API_SERVER_PATH` | API server endpoint path | `/api/v2/users` |
| `probability_error_codes` | `KRAWL_PROBABILITY_ERROR_CODES` | Error response probability (0-100%) | `0` |
| `database_path` | `KRAWL_DATABASE_PATH` | Database file location | `data/krawl.db` |
| `database_retention_days` | `KRAWL_DATABASE_RETENTION_DAYS` | Days to retain data in database | `30` |
| `http_risky_methods_threshold` | `KRAWL_HTTP_RISKY_METHODS_THRESHOLD` | Threshold for risky HTTP methods detection | `0.1` |
| `violated_robots_threshold` | `KRAWL_VIOLATED_ROBOTS_THRESHOLD` | Threshold for robots.txt violations | `0.1` |
| `uneven_request_timing_threshold` | `KRAWL_UNEVEN_REQUEST_TIMING_THRESHOLD` | Coefficient of variation threshold for timing | `0.5` |
| `uneven_request_timing_time_window_seconds` | `KRAWL_UNEVEN_REQUEST_TIMING_TIME_WINDOW_SECONDS` | Time window for request timing analysis in seconds | `300` |
| `user_agents_used_threshold` | `KRAWL_USER_AGENTS_USED_THRESHOLD` | Threshold for detecting multiple user agents | `2` |
| `attack_urls_threshold` | `KRAWL_ATTACK_URLS_THRESHOLD` | Threshold for attack URL detection | `1` |
### Examples
```bash
# Set port and delay
export KRAWL_PORT=8080
export KRAWL_DELAY=200
# Set canary token
export KRAWL_CANARY_TOKEN_URL="http://your-canary-token-url"
# Set tuple values (min,max format)
export KRAWL_LINKS_LENGTH_RANGE="3,20"
export KRAWL_LINKS_PER_PAGE_RANGE="5,25"
# Set analyzer thresholds
export KRAWL_HTTP_RISKY_METHODS_THRESHOLD="0.2"
export KRAWL_VIOLATED_ROBOTS_THRESHOLD="0.15"
# Set custom dashboard path
export KRAWL_DASHBOARD_SECRET_PATH="/my-secret-dashboard"
```
Or in Docker:
```bash
docker run -d \
-p 5000:5000 \
-e KRAWL_PORT=5000 \
-e KRAWL_DELAY=100 \
-e KRAWL_CANARY_TOKEN_URL="http://your-canary-token-url" \
--name krawl \
ghcr.io/blessedrebus/krawl:latest
```
## robots.txt
The actual (juicy) robots.txt configuration is the following
```txt
Disallow: /admin/
Disallow: /api/
Disallow: /backup/
Disallow: /config/
Disallow: /database/
Disallow: /private/
Disallow: /uploads/
Disallow: /wp-admin/
Disallow: /phpMyAdmin/
Disallow: /admin/login.php
Disallow: /api/v1/users
Disallow: /api/v2/secrets
Disallow: /.env
Disallow: /credentials.txt
Disallow: /passwords.txt
Disallow: /.git/
Disallow: /backup.sql
Disallow: /db_backup.sql
```
## Honeypot pages
Requests to common admin endpoints (`/admin/`, `/wp-admin/`, `/phpMyAdmin/`) return a fake login page. Any login attempt triggers a 1-second delay to simulate real processing and is fully logged in the dashboard (credentials, IP, headers, timing).
<div align="center">
<img src="img/admin-page.png" width="60%" />
</div>
Requests to paths like `/backup/`, `/config/`, `/database/`, `/private/`, or `/uploads/` return a fake directory listing populated with “interesting” files, each assigned a random file size to look realistic.
![directory-page](img/directory-page.png)
The `.env` endpoint exposes fake database connection strings, **AWS API keys**, and **Stripe secrets**. It intentionally returns an error due to the `Content-Type` being `application/json` instead of plain text, mimicking a “juicy” misconfiguration that crawlers and scanners often flag as information leakage.
![env-page](img/env-page.png)
The pages `/api/v1/users` and `/api/v2/secrets` show fake users and random secrets in JSON format
<div align="center">
<img src="img/api-users-page.png" width="45%" style="vertical-align: middle; margin: 0 10px;" />
<img src="img/api-secrets-page.png" width="45%" style="vertical-align: middle; margin: 0 10px;" />
</div>
The pages `/credentials.txt` and `/passwords.txt` show fake users and random secrets
<div align="center">
<img src="img/credentials-page.png" width="35%" style="vertical-align: middle; margin: 0 10px;" />
<img src="img/passwords-page.png" width="45%" style="vertical-align: middle; margin: 0 10px;" />
</div>
## Customizing the Canary Token
To create a custom canary token, visit https://canarytokens.org
and generate a “Web bug” canary token.
This optional token is triggered when a crawler fully traverses the webpage until it reaches 0. At that point, a URL is returned. When this URL is requested, it sends an alert to the user via email, including the visitors IP address and user agent.
To enable this feature, set the canary token URL [using the environment variable](#configuration-via-environment-variables) `CANARY_TOKEN_URL`.
## Customizing the wordlist
Edit `wordlists.json` to customize fake data for your use case
```json
{
"usernames": {
"prefixes": ["admin", "root", "user"],
"suffixes": ["_prod", "_dev", "123"]
},
"passwords": {
"prefixes": ["P@ssw0rd", "Admin"],
"simple": ["test", "password"]
},
"directory_listing": {
"files": ["credentials.txt", "backup.sql"],
"directories": ["admin/", "backup/"]
}
}
```
or **values.yaml** in the case of helm chart installation
## Dashboard
Access the dashboard at `http://<server-ip>:<port>/<dashboard-path>`
The dashboard shows:
- Total and unique accesses
- Suspicious activity detection
- Top IPs, paths, and user-agents
- Real-time monitoring
The attackers' triggered honeypot path and the suspicious activity (such as failed login attempts) are logged
![dashboard-1](img/dashboard-1.png)
The top IP Addresses is shown along with top paths and User Agents
![dashboard-2](img/dashboard-2.png)
### Retrieving Dashboard Path
Check server startup logs or get the secret with
```bash
kubectl get secret krawl-server -n krawl-system \
-o jsonpath='{.data.dashboard-path}' | base64 -d && echo
```
## 🤝 Contributing
Contributions welcome! Please:
1. Fork the repository
2. Create a feature branch
3. Make your changes
4. Submit a pull request (explain the changes!)
<div align="center">
## ⚠️ Disclaimer
**This is a deception/honeypot system.**
Deploy in isolated environments and monitor carefully for security events.
Use responsibly and in compliance with applicable laws and regulations.
## Star History
<img src="https://api.star-history.com/svg?repos=BlessedRebuS/Krawl&type=Date" width="600" alt="Star History Chart" />

View File

@@ -2,7 +2,7 @@ apiVersion: v2
name: krawl-chart
description: A Helm chart for Krawl honeypot server
type: application
version: 0.1.3
version: 0.1.4
appVersion: 0.1.6
keywords:
- honeypot

View File

@@ -111,13 +111,40 @@ class Config:
attack_urls_threshold=analyzer.get('attack_urls_threshold', 1)
)
def __get_env_from_config(config: str) -> str:
env = config.upper().replace('.', '_').replace('-', '__').replace(' ', '_')
return f'KRAWL_{env}'
def override_config_from_env(config: Config = None):
"""Initialize configuration from environment variables"""
for field in config.__dataclass_fields__:
env_var = __get_env_from_config(field)
if env_var in os.environ:
field_type = config.__dataclass_fields__[field].type
env_value = os.environ[env_var]
if field_type == int:
setattr(config, field, int(env_value))
elif field_type == float:
setattr(config, field, float(env_value))
elif field_type == Tuple[int, int]:
parts = env_value.split(',')
if len(parts) == 2:
setattr(config, field, (int(parts[0]), int(parts[1])))
else:
setattr(config, field, env_value)
_config_instance = None
def get_config() -> Config:
"""Get the singleton Config instance"""
global _config_instance
if _config_instance is None:
_config_instance = Config.from_yaml()
return _config_instance
override_config_from_env(_config_instance)
return _config_instance