iovisor / iovisor/bcc

tcpaccept-bpfcc does not seem to work.

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#2,165 3 comments 0 reactions 0 assignees View on GitHub

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Description

1) Ubuntu server running eBPF has following version for Ubuntu and Kernel.
_root@vm-tesst:/usr/sbin# lsb_release -a; uname -a
No LSB modules are available.
Distributor ID: Ubuntu
Description: Ubuntu 18.04.1 LTS
Release: 18.04
Codename: bionic
Linux vm-tesst 4.15.0-43-generic #46-Ubuntu SMP Thu Dec 6 14:45:28 UTC 2018 x86_64 x86_64 x86_64 GNU/Linux_

2) Started tcpaccept on Ubuntu server:
_root@vm-tesst:/usr/sbin# tcpaccept-bpfcc
PID COMM IP RADDR LADDR LPORT_

3) Opened a ssh connection from a client to Ubuntu server. Don't see anything getting update on tcpaccept. Am i missing something ?

Contributor guide

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First steps

  1. Read the whole issue, then the project's contributing guide.
  2. Comment on the issue to say you are picking it up — it saves two people doing the same work.
  3. Fork the repository and make your change on a branch.
  4. Open a pull request that references the issue number.

Research direction

Start by reproducing the reported SSH connection with the tcpaccept-bpfcc entry point on Ubuntu 18.04 and kernel 4.15.0-43-generic. Check whether accepted TCP connections appear in the tool output; done means identifying the cause of the missing event or documenting the confirmed compatibility limitation.

Written by the indexing model from the issue text.

Assessment

Tech stack
linux, ubuntu
Domain
networking, observability
Issue type
Bug
Difficulty
3/5
Estimated time
1-2 days
Activity status
Stale
Clarity
Mostly clear
Newbie friendliness
35/100

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