Product Introduction

1. Errsole is a free open-source logging solution designed for Node.js applications, providing developers with a comprehensive toolset for collecting, storing, and visualizing logs. It eliminates the need for complex infrastructure by bundling a log viewer and storage configuration into a single module. The product integrates directly into existing codebases, requiring minimal setup while offering advanced logging capabilities and real-time error monitoring.
2. The core value of Errsole lies in its ability to simplify log management without sacrificing functionality. It enables developers to centralize logs across environments, debug efficiently using a built-in dashboard, and receive instant notifications for critical errors. By combining lightweight integration with enterprise-grade features, it bridges the gap between basic console logging and resource-intensive solutions like Elasticsearch or CloudWatch.

Main Features

1. Errsole automatically captures all Node.js console logs and enhances them with support for multiple log levels (e.g., debug, warn, error) and metadata attachment. Developers can use methods like Errsole.log(), Errsole.error(), and Errsole.captureException() to enrich log context, improving traceability for complex applications.
2. The built-in web dashboard provides a centralized interface for filtering logs by severity, environment, or custom tags, as well as full-text search across log messages and metadata. It includes role-based access control, allowing teams to manage permissions and collaborate securely without exposing logs to third-party services.
3. Storage flexibility allows logs to be stored in SQLite files for local development or databases like MySQL, PostgreSQL, and MongoDB in production. Developers can configure retention policies and log rotation to optimize storage costs while ensuring compliance with data governance requirements.

Problems Solved

1. Errsole addresses the inefficiency of managing disjointed logging tools by unifying log collection, storage, and visualization in a single package. It eliminates the need for separate monitoring services, reducing infrastructure complexity and operational overhead.
2. The product targets Node.js developers and DevOps teams working in environments ranging from small-scale applications to enterprise systems. It is particularly valuable for teams lacking dedicated DevOps resources who require an out-of-the-box solution for production-grade logging.
3. Typical use cases include debugging runtime errors in development environments, monitoring application health in production, and auditing user activity across distributed microservices. It also serves as a cost-effective alternative for startups avoiding vendor lock-in with cloud-based logging services.

Unique Advantages

1. Unlike traditional logging libraries (e.g., Winston, Pino), Errsole includes an integrated dashboard and error notification system, removing dependency on external tools like Kibana or Grafana. It outperforms Elasticsearch in throughput, handling 90,000 more requests per minute in benchmark tests.
2. The patented log routing system enables simultaneous writing to multiple storage backends without performance degradation. This allows hybrid setups, such as storing debug logs locally in SQLite while sending critical errors to a centralized MongoDB cluster.
3. Competitive advantages include zero-cost self-hosting, compatibility with Bun and Deno runtimes, and extensible APIs for custom log processors. The MIT license permits unrestricted use in commercial projects, unlike SaaS alternatives with tiered pricing models.

Frequently Asked Questions (FAQ)

1. How can I resolve the "Error: listen EADDRINUSE: address already in use :::8001" error? This occurs when the Errsole dashboard port conflicts with another service. Modify the port configuration in the initialization script using Errsole.configure({ port: 8011 }) or terminate the process occupying port 8001.
2. How can I run the Errsole Dashboard on a separate server from my application? Deploy a dedicated instance of Errsole connected to a shared database (e.g., MySQL or PostgreSQL) where all application instances write logs. Configure the dashboard instance to read from this centralized storage using environment variables.
3. How do I contribute to Errsole’s development? Propose features or bug fixes in the GitHub discussion forum, then submit a pull request following the contribution guidelines. All changes must include unit tests and updated TypeScript type definitions to maintain compatibility with Node.js and Bun ecosystems.