Coroot: The Magic of Zero-Instrumentation Observability with eBPF

We usually spend a lot of time talking about our good friend Zabbix, but today, we are changing the paradigm. We are diving into something really amazing for all the fans of monitoring and observability.

Today, I want to introduce you to Coroot, a modern, open-source tool designed to handle observability without making you break a sweat. If you are tired of manually instrumenting your code or dealing with heavy legacy monitoring agents, you are going to love this.

What is Coroot?

Coroot is an open-source, eBPF-based observability platform. Its biggest selling point? Zero-instrumentation. It automatically turns metrics, logs, traces, and profiles into actionable insights without requiring you to change a single line of your application code.

In the past, if we wanted to monitor an application—let's say using OpenTelemetry—we had to introduce dedicated libraries for PHP, Ruby, Python, or whatever language we were using, just to stream information to a tracing tool. With Coroot, that entire process is automated.

The Magic Under the Hood: What is eBPF?

To understand why Coroot is so powerful, we need to talk about eBPF (Extended Berkeley Packet Filter). You can think of eBPF as "JavaScript for the Linux Kernel." It’s a kernel functionality that allows us to safely run sandboxed micro-programs directly inside the operating system core.

Because it intercepts system calls at the kernel level, eBPF can observe:

The best part? It's completely safe. The code runs within a sandbox, meaning it will never crash your kernel, even if your application fails. It offers ultra-low overhead and kernel-space execution, making it incredibly performant compared to legacy solutions that rely on heavy, resource-hungry agents.

Architecture and System Requirements

Coroot operates using a very efficient stack. You don't need a massive, complicated setup to get started. The architecture consists of:

Minimum Requirements

Because the node agent interacts directly with the Linux kernel, you will need a modern OS with a Linux Kernel of 5.1 or newer. This means distributions like Ubuntu 20.10+, Debian 11+, and RHEL/Rocky Linux 8.2+ are fully supported.

Can you monitor Windows? Not natively via the eBPF agent, as it is strictly Linux-only. However, Coroot natively supports OpenTelemetry and Prometheus, so you can still configure your Windows applications to send their telemetry data to the platform.

The Compromise: Node Agent Privileges

In the world of IT, magic always comes with a compromise. To achieve this incredible auto-discovery and tracing, the Coroot Node Agent needs to ask the kernel for information. This means the container running the agent must have elevated, privileged access (root access) to read system data.

While this might raise an eyebrow for strict security environments, it's worth noting that from kernel version 5.8 onwards, this issue has been greatly mitigated. There are ad-hoc flags allowing you to tune the privileges so the container only reads eBPF information without having full control over the host.

Open Source vs. Enterprise

Coroot offers two flavors: Community (Open Source) and Enterprise.

The Open Source Edition is fantastic because it has absolutely no limits. You get unlimited scaling for your nodes and containers, full eBPF telemetry, auto-generated service maps, SLO tracking, and even cost monitoring to track your cloud expenses down to the specific application.

The Enterprise Edition is geared towards larger organizations. It introduces AI-powered Root Cause Analysis, Single Sign-On (SSO/SAML), Role-Based Access Control (RBAC), and comprehensive audit logs. The pricing is very honest—a flat rate per monitored CPU core with no hidden data-ingestion fees.

Deploying Coroot

Installing Coroot is a breeze. You can deploy it via Docker, Docker Swarm, or Kubernetes. For my lab, I used a simple Docker Compose setup. Here is a quick example of how you can spin up the Coroot container:

version: "3.8"
services:
coroot:
image: ghcr.io/coroot/coroot:latest
ports:
- "8080:8080"
environment:
- CLICKHOUSE_ADDRESS=clickhouse:9000
- PROMETHEUS_URL=http://prometheus:9090
restart: always

Once your server is up, you simply run a curl command (or deploy a DaemonSet in Kubernetes) to install the node agent on your target machines, point it to your Coroot server, and you are ready to go!

My Experience: Features That Stand Out

After playing around with it in my lab, a few features really stood out to me:

Conclusion

Coroot is a massive step forward for modern observability. For 80% of use cases, the zero-instrumentation approach provides more than enough detail to fix problems quickly and efficiently. If you need deeper tracing, you can always integrate OpenTelemetry later.

I find this solution incredibly interesting and highly recommend you give it a try in your own lab. Let me know what you think of Coroot! Are there any other observability tools you'd like us to test together? Drop a comment below, and I'll share my thoughts.

That's all for today. See you next week!

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