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FrauBSD / nfsiosnoop

Snoop on Linux NFS I/O using bpftrace
BSD 2-Clause "Simplified" License
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Unknown struct/union: 'uint64' #1

Closed aravindhsampath closed 4 years ago

aravindhsampath commented 4 years ago

Hello.

I tried to run nfsiosnoop on our CentOS 8 NFS server, and ended up with the following.

# nfsiosnoop
INFO Tracing I/O... Hit Ctrl-C to end.
INFO Gathering open file-descriptor info...
Unknown struct/union: 'uint64'
Unknown struct/union: 'uint64'
Unknown struct/union: 'int64'
Unknown struct/union: 'int64'
Unknown struct/union: 'int64'
Unknown struct/union: 'int64'
Unknown struct/union: 'int64'
Unknown struct/union: 'int64'
Unknown struct/union: 'int64'

Do you have any clue what might be going on here?

freebsdfrau commented 4 years ago

It looks like CentOS 8.1 ships with an older software than what is required. I am currently working on a script to update CentOS 8 to the required minimum versions

freebsdfrau commented 4 years ago

OK. Run these steps on CentOS 8.1:

git clone https://github.com/FrauBSD/el8-bpf-specs.git
cd el8-bpf-specs
./build-all.sh

Repo Link: FrauBSD.org/el8-bpf-specs

That should update:

  1. bcc from version 0.8.0-4 to 0.11.0-1
  2. bpftrace from version 0.9-3 to 0.9.3-1

It will produce bcc and bpftrace RPMs in ~/rpmbuild/RPMS/ for you to deploy on similar systems (for example, by tossing them into an internal yum repository or installing manually with rpm -ivh <file>).

aravindhsampath commented 4 years ago

Thanks for this. I now have updated versions of bcc, bpftrace and got nfsiosnoop working!