pm2

PM2 is a command line tool used to manage and monitor Node.js applications in production environments. It stands for "Process Manager 2" and is designed to simplify the process of deploying and managing multiple instances of Node.js applications.

One of the main features of PM2 is its ability to automatically restart applications in case of failures or crashes, ensuring high availability. It also provides a built-in load balancer to distribute the incoming traffic among multiple instances of the application to improve performance and reliability.

PM2 has a simple and easy-to-use command line interface, making it convenient to start, stop, and monitor applications. It also offers a web-based dashboard where users can visualize the status of their applications, view logs, and monitor resource usage.

In addition to managing applications locally, PM2 supports deployment to remote servers, allowing users to scale their applications across multiple machines easily. It also integrates with various third-party tools and services like Docker, AWS, and Azure for seamless deployment and management.

PM2 enables zero-downtime deployments, allowing users to update their applications without disrupting the service. Instead of stopping the application during the update, it launches a new instance, transfers the traffic over slowly, and then stops the old instance once the new one is up and running.

PM2 also provides advanced features like process clustering, where multiple instances of an application can run in parallel to handle higher traffic loads. It supports runtime monitoring, log management, and log rotation, enabling users to analyze the health and performance of their applications.

Overall, PM2 is a powerful command line tool that simplifies the deployment and management of Node.js applications, ensuring continuous availability and performance.