Package Exports

@telemetry-js/collector-dmesg

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Readme

collector-dmesg

Collect a count of certain kernel log messages.
A telemetry plugin.

Click to expand

Usage
- Included messages
API
- Options
Install
Acknowledgements
License

Usage

const telemetry = require('@telemetry-js/telemetry')()
const dmesg = require('@telemetry-js/collector-dmesg')

telemetry.task()
  .collect(dmesg)

Included messages

TCP: [..] Possible SYN flooding [..]
- Happens when net.ipv4.tcp_max_syn_backlog is exceeded
- Suggested action: if amount of SYN is legit (not DDOS), increase tcp_max_syn_backlog
TCP: too many orphaned sockets
- Happens when net.ipv4.tcp_max_orphans is exceeded
- Suggested action: if amount of orphans is legit, increase tcp_max_orphans and consider disabling tcp_orphan_retries to significantly decrease the lifetime of orphans
TCP: out of memory [..]
- Suggested action: tune net.ipv4.tcp_mem
net_ratelimit: [..] callbacks suppressed
- Can happen when too many messages are logged too fast. The kernel will suppress surplus messages and can thus also prevent the above messages from reaching us.

API

Options

Yet to document.

Install

With npm do:

npm install @telemetry-js/collector-dmesg

Acknowledgements

This project is kindly sponsored by Reason Cybersecurity Ltd.

@telemetry-js/collector-dmesg