Skip to content

Instantly share code, notes, and snippets.

@ph1048
Forked from MarioHewardt/enable_ebpf_on_wsl2
Created December 15, 2021 03:09
Show Gist options
  • Save ph1048/d82eb9473a69d7e5df79626daa08e947 to your computer and use it in GitHub Desktop.
Save ph1048/d82eb9473a69d7e5df79626daa08e947 to your computer and use it in GitHub Desktop.
Enable EBPF on WSL2
By default, EBPF programs will not run on WSL2 due to required kernel modules missing. The following example error is an
indication of this problem:
modprobe: ERROR: ../libkmod/libkmod.c:586 kmod_search_moddep() could not open moddep file '/lib/modules/4.19.84-microso
ft-standard/modules.dep.bin'
modprobe: FATAL: Module kheaders not found in directory /lib/modules/4.19.84-microsoft-standard
chdir(/lib/modules/4.19.84-microsoft-standard/build): No such file or directory
To fix this you need to rebuild the WSL2 kernel with the missing kernel modules. The below instructions are for Ubuntu 18.04 WSL2.
1. git clone https://github.com/microsoft/WSL2-Linux-Kernel.git
2. cd WSL2-Linux-Kernel
3. sudo apt install flex bison build-essential libelf-dev libncurses-dev libssl-dev
4. cp Microsoft/config-wsl .config
5. Add the kernel flags specified in https://github.com/iovisor/bcc/blob/master/INSTALL.md#kernel-configuration to .config
6. export KERNELRELEASE=4.19.84-microsoft-standard
NOTE: Make sure the version corresponds to the version of WSL2. Run: uname -a
7. make KERNELRELEASE=$KERNELRELEASE -j 4
8. make KERNELRELEASE=$KERNELRELEASE modules -j 4
9. sudo make KERNELRELEASE=$KERNELRELEASE modules_install
10. (confirm you can see files under /lib/modules/$(uname -r))
11. sudo mount -t debugfs debugfs /sys/kernel/debug (for any apps that uses it since its not mounted by default)
@ph1048
Copy link
Author

ph1048 commented Dec 15, 2021

@ph1048
Copy link
Author

ph1048 commented Dec 16, 2021

Sign up for free to join this conversation on GitHub. Already have an account? Sign in to comment