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I've a diskless workstation which boot #ubuntu on LAN. However, the version 14.04 on tftp server is becoming outdated.

I am seeking for a solution that I should able to "reboot" the diskless machines into a fresh 18.04 installation by kexec on another NFS server.

  • p.s. I have no control on neither DHCP/tftp server it was booted from. But I have root access on the workstation itself and another NFS server.

  • p.p.s. It can, but I don't want to plug any USB or disk.

  • p.p.p. It run BIOS, not UEFI.

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Found pxe-kexec which doing very similar to what I am looking for.

pxe-kexec use tftp/ftp to download image from PXE server and kexec to reboot.

In order to achieve the reboot, you need to

  • setup a tftp server for hosting kernel image
  • setup a NFS server for hosting post-boot system disk.
  • run pxe-kexec [my-server-ip]
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