PM2 is a common choice for running Node.js applications, but understanding its limitations and alternatives helps you choose the right process management approach for your specific situation.
What PM2 Does Well
Simple to set up, Node.js-specific conveniences (log management, easy cluster mode for multi-core utilization, straightforward CLI), and a low barrier to entry — genuinely a good choice for many straightforward Node.js deployments.
Where PM2 Has Real Limitations
- Adds an additional layer/dependency beyond what the OS itself provides (systemd already handles process supervision)
- PM2 itself needs to be kept running and healthy — another component that can itself have issues
- Less integrated with broader Linux system tooling (logging, monitoring) compared to native systemd
- Language-specific (built for Node.js); doesn't naturally extend to managing your database, web server, and other non-Node.js services in the same unified way
systemd: The Native Linux Alternative
See How to Manage Services with systemd and systemctl — systemd is already present on virtually every modern Linux distribution, manages any type of process (not just Node.js), and integrates natively with journald logging and the broader OS service ecosystem.
When systemd Is the Better Choice
- You want unified process management across your entire stack (web server, database, application, everything), not just Node.js specifically
- You prefer relying on OS-native tooling over an additional third-party dependency
- You want tighter integration with system logging/journald
Supervisor: A Language-Agnostic Alternative
Supervisor is another process manager, commonly used for Python applications but genuinely language-agnostic — a reasonable middle ground if you want more application-focused process management than systemd but aren't specifically tied to Node.js/PM2.
When to Actually Choose PM2
- You're specifically running Node.js applications and want its Node-specific conveniences (easy cluster mode, built-in log rotation)
- Your team is more comfortable with PM2's CLI than systemd unit file configuration
- You're managing many Node.js processes and want PM2's unified dashboard/monitoring view across them
Using PM2 and systemd Together (A Common Practical Pattern)
pm2 startup
pm2 saveA common approach: use PM2 for its Node.js-specific process management conveniences, but have systemd ensure PM2 itself starts reliably on boot and stays running — getting benefits of both rather than treating it as strictly either/or.
Docker as Another Alternative Entirely
If you're using Docker (see How to Install Docker Compose on Ubuntu & Debian), container restart policies (see Docker Restart Policies and Healthchecks Explained) handle much of what a process manager would otherwise provide, potentially making a separate process manager unnecessary within that architecture.
A Practical Decision Framework
- Using Docker? Container restart policies likely suffice; a separate process manager may be redundant
- Pure Node.js, want simplicity and Node-specific features? PM2 is reasonable
- Want maximum OS integration and language-agnostic management across your whole stack? systemd
- Python-focused, want more than systemd's raw configuration but less Node-specific than PM2? Supervisor
Continue Reading
- Process Managers Compared: PM2 vs systemd vs Supervisor
- How to Manage Services with systemd and systemctl
- Docker Restart Policies and Healthchecks Explained
Browse more articles in Programming Languages & Runtimes.
