Passing Kernel Parameters

[Daxcor]

Hello,

I am trying to move all of my work to terraform. The iso I wish to launch, via terraform, has grub kernel parameters which I would like to set. Is this something proxmox can do?

Here is what the grub menu looks ike



I would need to add to the linux line. Has anyone been able to do this?

thanks
Brad

 

[fschauer]

Here are the basic grub kernel parameters to boot into the Proxmox VE graphical installer:

setparams 'Install Proxmox VE (Graphical)'

    echo 'Loading Proxmox VE Installer ...'
    linux /boot/linux26 ro ramdisk_size=16777216 rw quiet splash=silent
    echo 'Loading initial ramdisk ...'
    initrd /boot/initrd.img

 

[Daxcor]

Here are the basic grub kernel parameters to boot into the Proxmox VE graphical installer:

setparams 'Install Proxmox VE (Graphical)'

    echo 'Loading Proxmox VE Installer ...'
    linux /boot/linux26 ro ramdisk_size=16777216 rw quiet splash=silent
    echo 'Loading initial ramdisk ...'
    initrd /boot/initrd.img

I am not looking send parameters to install proxmox, but to create a VM in proxmox with a specific iso and adding grub values.

 

[fschauer]

You can usually press 'e' on the GRUB boot menu screen to edit the parameters. If you don't want to manually edit the parameters on every boot, you could modify the GRUB boot config (/boot/grub/grub.cfg) on the ISO.

Another option would be a direct kernel boot which would bypass GRUB and boot directly into Linux.
This can be achieved by specifying the QEMU arguments in /etc/pve/qemu-server/<vmid>.conf

args: -kernel /path/to/vmlinuz -initrd /path/to/initrd.img -append "root=UUID=23ee90b6-f0fb-49da-b613-c2d7bce04e5e"

 

[jan.reges]

Warning for ZFS users: if you are booting to ZFS disks, updating /etc/default/grub and update-grub will not help.

If you want to add pcie_port_pm=off pcie_aspm.policy=performance to the kernel even when booting on ZFS, you must add these parameters to /etc/kernel/cmdline and then run proxmox-boot-tool refresh. After the reboot, you should already find these parameters by cat /proc/cmdline.

 

[leesteken]

Warning for ZFS users: if you are booting to ZFS disks, updating /etc/default/grub and update-grub will not help.

But only when booting in UEFI mode. More information in the manual: https://pve.proxmox.com/pve-docs/pve-admin-guide.html#sysboot_determine_bootloader_used

If you want to add pcie_port_pm=off pcie_aspm.policy=performance to the kernel even when booting on ZFS, you must add these parameters to /etc/kernel/cmdline and then run proxmox-boot-tool refresh. After the reboot, you should already find these parameters by cat /proc/cmdline.

It's all in the manual (although a bit terse): https://pve.proxmox.com/pve-docs/pve-admin-guide.html#sysboot_edit_kernel_cmdline