VPP stats segment FUSE filesystem

The statfs binary allows to create a FUSE filesystem to expose and to browse the stats segment. Is is leaned on the Go-FUSE library and requires Go-VPP stats bindings to work.

The binary mounts a filesystem on the local machine whith the data from the stats segments. The counters can be opened and read as files (e.g. in a Unix shell). Note that the value of a counter is determined when the corresponding file is opened (as for /proc/interrupts).

Directories regularly update their contents so that new counters get added to the filesystem.

Prerequisites (for building)

GoVPP library (master branch) Go-FUSE library vpp, vppapi

Building

Here, we add the Go librairies before building the binary

go mod init stats_fs
go get git.fd.io/govpp.git@master
go get git.fd.io/govpp.git/adapter/statsclient@master
go get github.com/hanwen/go-fuse/v2
go build

Usage

The basic usage is:

sudo ./statfs <MOUNT_POINT> &

Options:

• debug <true|false> (default is false)
• socket <statSocket> (default is /run/vpp/stats.sock)

Browsing the filesystem

You can browse the filesystem as a regular user. Example:

cd /path/to/mountpoint
cd sys/node
ls -al
cat names

Unmounting the file system

You can unmount the filesystem with the fusermount command.

sudo fusermount -u /path/to/mountpoint

To force the unmount even if the resource is busy, add the -z option:

sudo fusermount -uz /path/to/mountpoint