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lima-vm
Include kernel config file
Description
IIUC, Lima uses a Ubuntu distro.
Ubuntu has a kernel config file that includes the value of all of the kernel source configuration entries.
Ubuntu puts that file at /boot/config-$(uname -r).
Pixie (px.dev) reads this config file at runtime, to determine the right configuration entry for compiling C code to BPF byte code using BCC.
Let me know if I could help with any changes.
It seems to be there, for the "default":
anders@lima-default:/home/anders$ ls /boot/
System.map-5.15.0-25-generic config-5.15.0-25-generic efi grub initrd.img initrd.img-5.15.0-25-generic initrd.img.old vmlinuz vmlinuz-5.15.0-25-generic vmlinuz.old
Maybe you are thinking of alpine-lima ?
It uses a "Live CD" boot mechanism, and the kernel config is elsewhere.
lima-alpine:/home/anders$ ls /boot
ls: /boot: No such file or directory
Currently it is at /media/cdrom/boot/config-virt, for the "virt" kernel.
Oh nice, let me verify the /media/cdrom/boot/config-virt.
For background, my use case is with https://github.com/rancher-sandbox/rancher-desktop, which uses lima to create VM. I'll also submit an issue at rancher-sandbox's repo to gather their suggestions.
One approach is to use CONFIG_IKCONFIG_PROC, which makes it available in /proc/config.gz.
But making the config file configurable is probably also a viable approach, and default to /boot files ?
It is available at
/media/sr0/boot/config-virt
Right, seems like the mountpoint changed in 3.15.
lima-alpine:/home/anders/alpine-lima$ more /etc/fstab
/dev/cdrom /media/cdrom iso9660 noauto,ro 0 0
/dev/usbdisk /media/usb vfat noauto,ro 0 0
#LIMA-START
#LIMA-END
lima-alpine:/home/anders/alpine-lima$ ls -l /dev/cdrom
lrwxrwxrwx 1 root root 3 Jun 2 16:45 /dev/cdrom -> sr0
Should be the same thing.
Should be the same thing.
But somehow it isn't:
lima-rancher-desktop:~$ more /etc/fstab
/dev/cdrom /media/cdrom iso9660 noauto,ro 0 0
/dev/usbdisk /media/usb vfat noauto,ro 0 0
#LIMA-START
#LIMA-END
lima-rancher-desktop:~$ ls -l /dev/cdrom
lrwxrwxrwx 1 root root 3 Jun 2 16:38 /dev/cdrom -> sr0
lima-rancher-desktop:~$ ls /media/cdrom
lima-rancher-desktop:~$ ls /media/sr0
alpine.apkovl.tar.gz apks boot efi
Indeed confusing.
/etc/fstab:/dev/cdrom /media/cdrom iso9660 noauto,ro 0 0
/etc/mtab:/dev/sr0 /media/sr0 iso9660 ro,relatime,nojoliet,check=s,map=n,blocksize=2048,iocharset=utf8 0 0
Wonder who mounts things ?
I am not familiar with filesystem setups, but is there a way to ssh to the Lima VM, so that I could manually examine my local VM setup in rancher-desktop?
I've already replied in https://github.com/rancher-sandbox/rancher-desktop/discussions/2324#discussioncomment-2873022