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GitHublinnix-os/linnix

linnix

eBPF-powered Linux observability with AI incident detection. AGPL-3.0 licensed.

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2491531 day agoReviewed by Kitploit

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Linnix

Find which process is hurting your SLOs — not just who's using CPU, but who's causing stalls.

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The Problem

top shows 80% CPU. Prometheus shows high latency. But which pod is actually stalling your payment service?

Linnix uses eBPF + PSI (Pressure Stall Information) to answer this. PSI measures actual stall time — not usage, but contention. A pod using 40% CPU with 60% PSI is worse than one using 100% CPU with 5% PSI.

What Linnix detects:

  • Noisy Neighbors: Which container is starving others
  • Fork Storms: Runaway process creation before it crashes the node
  • Stall Attribution: "Pod X caused 300ms stall to Pod Y"
  • PSI Saturation: CPU/IO/Memory pressure that doesn't show in top

[!IMPORTANT] Monitor-only by default. Linnix detects and reports — it never takes action without explicit configuration.

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🔒 Security & Privacy

  • Security Policy: See our security model, privileges required, and vulnerability reporting process
  • Safety Guarantees: Understand our "Monitor-First" architecture and safety controls
  • Architecture Overview: System diagram and data flow for security reviews

Key Promise: All analysis happens locally. No data leaves your infrastructure unless you explicitly configure Slack notifications. Learn more about data privacy →


Quickstart (Kubernetes)

Deploy Linnix as a DaemonSet to monitor your cluster.

root@kitploit:~
# Apply the manifests
kubectl apply -f k8s/

Access the API:

root@kitploit:~
kubectl port-forward daemonset/linnix-agent 3000:3000
# API available at http://localhost:3000
# Stream events: curl http://localhost:3000/stream

Quickstart (Docker)

Try it on your local machine in 30 seconds.

root@kitploit:~
git clone https://github.com/linnix-os/linnix.git && cd linnix
./quickstart.sh

How It Works

  1. Collector (eBPF): Sits in the kernel, watching fork, exec, exit, and scheduler events with <1% overhead.
  2. Reasoning Engine: Aggregates signals (PSI + CPU + Process Tree) to detect failure patterns.
  3. Triage Assistant: When a threshold is breached, Linnix captures the system state and explains the root cause.

Supported Detections

Incident TypeDetection LogicTriage Value
Circuit BreakerHigh PSI (>40%) + High CPU (>90%)Identifies the specific process tree causing the stall.
Fork Storm>10 forks/sec for 2sCatches runaway scripts before they crash the node.
Memory LeakSustained RSS growthFlags containers that will eventually OOM.
Short-lived JobsRapid exec/exit churnIdentifies inefficient build scripts or crash loops.

Safety & Architecture

Linnix is designed for production safety.

  • Monitor-First: Enforcement capabilities are opt-in and require explicit configuration.
  • Low Overhead: Uses eBPF perf buffers, not /proc polling.
  • Privilege Isolation: Can run with CAP_BPF and CAP_PERFMON on bare metal. Kubernetes DaemonSet currently uses privileged mode for simplicity.

See SAFETY.md for our detailed safety model.


Kubernetes Features

Linnix has first-class Kubernetes support:

  • Pod Attribution: Every process event is tagged with pod_name, namespace, container_id
  • Namespace Awareness: Filter and query by namespace
  • PSI Contribution Tracking: See which pod contributed to system-wide PSI pressure
  • cgroup Integration: Maps processes to their cgroups for container-level aggregation
root@kitploit:~
# Example: Get processes causing stalls in the payments namespace
curl "http://localhost:3000/processes?namespace=payments&sort=psi_contribution"

Commerce / On-Chain Settlement

Linnix includes a trustless payment layer (Linnix-Claw) that settles agent-to-agent work on-chain via ERC-20 stablecoins. When one agent delegates a task to another, the result — a signed receipt with telemetry proof — is submitted to a TaskSettlement smart contract that releases payment directly from payer to payee.

Architecture

root@kitploit:~
Agent A (payer)                    Agent B (payee)
   │  createTask(taskId, payeeDID, maxAmount)
   │──────────────────────────────────▶│
   │                                   │ ← does work, captures eBPF telemetry
   │    submitReceipt(taskId, amount, receipt, sig)
   │◀──────────────────────────────────│
   │                                   │
   └──── TaskSettlement.sol ─── ERC-20 transfer ──▶ payee

Key contracts (Base Sepolia testnet):

ContractAddress
AgentRegistry0x9a6FeBA6d7B97ef91099051eB61F372d1EcD83a3
TaskSettlement0x60eE6872920addF41359625B47A07401496bBD5b
StakeBond0xEE31fC610B9b64982990adB3ba228E9dBbfF6a73

Configuration

Add a [chain] section to your linnix.toml:

root@kitploit:~
[chain]
enabled = true
rpc_url = "https://sepolia.base.org"
chain_id = 84532
settlement_contract = "0x60eE6872920addF41359625B47A07401496bBD5b"
registry_contract = "0x9a6FeBA6d7B97ef91099051eB61F372d1EcD83a3"
token_address = "0x036CbD53842c5426634e7929541eC2318f3dCF7e"  # USDC on Base Sepolia
token_decimals = 6

The signer key is resolved in priority order:

  1. chain.private_key in config
  2. LINNIX_CHAIN_PRIVATE_KEY env var
  3. HKDF-derived secp256k1 key from the agent's Ed25519 identity (default — zero config)

End-to-End Demo

root@kitploit:~
# Deploy contracts to a local Hardhat node
cd linnix-claw-contracts && npx hardhat node &
npx hardhat run scripts/deploy.js --network localhost

# Run the commerce demo
./scripts/demo_commerce_e2e.sh --local

See the contract source and cognitod/src/onchain.rs for implementation details.


Early Adopters

This project is under active development. If you're using it or evaluating it, open an issue or email [email protected].


License

  • Agent (cognitod): AGPL-3.0
  • eBPF Collector: GPL-2.0 or MIT (eBPF programs must be GPL-compatible for kernel loading)

Commercial licensing available for teams that can't use AGPL. See LICENSE_FAQ.md for details.