Hey Markus, Ilya, you don't know with how much interest I am following this thread, because ... >> Generally it would be great if you could include the proper initrd code for RBD and CephFS root filesystems to the Ceph project. You can happily use my code as a starting point. >> >> https://github.com/trickkiste/ltsp/blob/feature-boot_method-rbd/debian/ltsp-rbd.initramfs-script > > I think booting from CephFS would require kernel patches. It looks > like NFS and CIFS are the only network filesystems supported by the > init/root infrastructure in the kernel. ... we have been looking for a while to a discussion about using RBD (not cephfs) as a replacement for a hard disk. Linux can map RBD devices, so should Linux not also be able to *boot* from an rbd device similar to a regular disk? I did not find any example of this yet, but I'd assume that conceptually one would probably: - preload a Linux kernel from the network (potentially via ipxe) - specify root=rbd://fsid/pool/image Or in a even *better* variant: - the bootloader (ipxe?) can map RBD - the bootloader pre-loads enough of the image for reading the partition - the bootloader either loads the kernel + initramfs *or* chainloads another bootloader What are your thoughts on this? Do-able or totally crazy? Best regards, Nico -- Sustainable and modern Infrastructures by ungleich.ch _______________________________________________ ceph-users mailing list -- ceph-users@xxxxxxx To unsubscribe send an email to ceph-users-leave@xxxxxxx
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