How to auto mount a partition during initramfs/inird phase?

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I have an encrypted Debian linux system. I also try to detach the LUKS header from the encrypted container. The whole /boot/ partition will be stored on a separate device. I thought I could place the LUKS header under /boot/header/luks.img , but during the initramfs/initrd phase this path doesn't exists because the /boot/ partition isn't mounted yet.



So the question is how to automatically mount the /boot/ partition before the system tries to open the encrypted device? Or is there any other (or better) way to make it work?




debian encryption boot-loader luks initramfs




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  • Does /etc/crypttab get it working right? I think there's a "load first or second" option that might help, but I'm not able to check/search now, if crypttab isn't too "late" already
    – Xen2050
    Mar 16 at 21:55










  • It's a little bit complicated setup when you want to make it work the way I wanted to. I've managed to do it ultimately. See the answer
    – Mikhail Morfikov
    Mar 16 at 23:34














up vote
0
down vote

favorite












I have an encrypted Debian linux system. I also try to detach the LUKS header from the encrypted container. The whole /boot/ partition will be stored on a separate device. I thought I could place the LUKS header under /boot/header/luks.img , but during the initramfs/initrd phase this path doesn't exists because the /boot/ partition isn't mounted yet.



So the question is how to automatically mount the /boot/ partition before the system tries to open the encrypted device? Or is there any other (or better) way to make it work?




debian encryption boot-loader luks initramfs




share|improve this question




















  • Does /etc/crypttab get it working right? I think there's a "load first or second" option that might help, but I'm not able to check/search now, if crypttab isn't too "late" already
    – Xen2050
    Mar 16 at 21:55










  • It's a little bit complicated setup when you want to make it work the way I wanted to. I've managed to do it ultimately. See the answer
    – Mikhail Morfikov
    Mar 16 at 23:34












up vote
0
down vote

favorite









up vote
0
down vote

favorite











I have an encrypted Debian linux system. I also try to detach the LUKS header from the encrypted container. The whole /boot/ partition will be stored on a separate device. I thought I could place the LUKS header under /boot/header/luks.img , but during the initramfs/initrd phase this path doesn't exists because the /boot/ partition isn't mounted yet.



So the question is how to automatically mount the /boot/ partition before the system tries to open the encrypted device? Or is there any other (or better) way to make it work?




debian encryption boot-loader luks initramfs




share|improve this question












I have an encrypted Debian linux system. I also try to detach the LUKS header from the encrypted container. The whole /boot/ partition will be stored on a separate device. I thought I could place the LUKS header under /boot/header/luks.img , but during the initramfs/initrd phase this path doesn't exists because the /boot/ partition isn't mounted yet.



So the question is how to automatically mount the /boot/ partition before the system tries to open the encrypted device? Or is there any other (or better) way to make it work?





debian encryption boot-loader luks initramfs





share|improve this question











share|improve this question




share|improve this question










asked Mar 15 at 19:48









Mikhail Morfikov

4,290114067




4,290114067











  • Does /etc/crypttab get it working right? I think there's a "load first or second" option that might help, but I'm not able to check/search now, if crypttab isn't too "late" already
    – Xen2050
    Mar 16 at 21:55










  • It's a little bit complicated setup when you want to make it work the way I wanted to. I've managed to do it ultimately. See the answer
    – Mikhail Morfikov
    Mar 16 at 23:34
















  • Does /etc/crypttab get it working right? I think there's a "load first or second" option that might help, but I'm not able to check/search now, if crypttab isn't too "late" already
    – Xen2050
    Mar 16 at 21:55










  • It's a little bit complicated setup when you want to make it work the way I wanted to. I've managed to do it ultimately. See the answer
    – Mikhail Morfikov
    Mar 16 at 23:34















Does /etc/crypttab get it working right? I think there's a "load first or second" option that might help, but I'm not able to check/search now, if crypttab isn't too "late" already
– Xen2050
Mar 16 at 21:55




Does /etc/crypttab get it working right? I think there's a "load first or second" option that might help, but I'm not able to check/search now, if crypttab isn't too "late" already
– Xen2050
Mar 16 at 21:55












It's a little bit complicated setup when you want to make it work the way I wanted to. I've managed to do it ultimately. See the answer
– Mikhail Morfikov
Mar 16 at 23:34




It's a little bit complicated setup when you want to make it work the way I wanted to. I've managed to do it ultimately. See the answer
– Mikhail Morfikov
Mar 16 at 23:34










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Basically, this setup won't work OOTB because you have to mount some partition (in this case /boot/) in the initramfs/initrd phase, and by default there's no partition mounted there. Without the /boot/ partition you can't use the LUKS header. So the only way to make it work is to write some custom scripts that will mount/unmount the partition in the initramfs/initrd phase.



I've manage to write some HowTo on this subject, and the setup works really great.






share|improve this answer




















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    up vote
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    down vote













    Basically, this setup won't work OOTB because you have to mount some partition (in this case /boot/) in the initramfs/initrd phase, and by default there's no partition mounted there. Without the /boot/ partition you can't use the LUKS header. So the only way to make it work is to write some custom scripts that will mount/unmount the partition in the initramfs/initrd phase.



    I've manage to write some HowTo on this subject, and the setup works really great.






    share|improve this answer
























      up vote
      0
      down vote













      Basically, this setup won't work OOTB because you have to mount some partition (in this case /boot/) in the initramfs/initrd phase, and by default there's no partition mounted there. Without the /boot/ partition you can't use the LUKS header. So the only way to make it work is to write some custom scripts that will mount/unmount the partition in the initramfs/initrd phase.



      I've manage to write some HowTo on this subject, and the setup works really great.






      share|improve this answer






















        up vote
        0
        down vote










        up vote
        0
        down vote









        Basically, this setup won't work OOTB because you have to mount some partition (in this case /boot/) in the initramfs/initrd phase, and by default there's no partition mounted there. Without the /boot/ partition you can't use the LUKS header. So the only way to make it work is to write some custom scripts that will mount/unmount the partition in the initramfs/initrd phase.



        I've manage to write some HowTo on this subject, and the setup works really great.






        share|improve this answer












        Basically, this setup won't work OOTB because you have to mount some partition (in this case /boot/) in the initramfs/initrd phase, and by default there's no partition mounted there. Without the /boot/ partition you can't use the LUKS header. So the only way to make it work is to write some custom scripts that will mount/unmount the partition in the initramfs/initrd phase.



        I've manage to write some HowTo on this subject, and the setup works really great.







        share|improve this answer












        share|improve this answer



        share|improve this answer










        answered Mar 16 at 23:33









        Mikhail Morfikov

        4,290114067




        4,290114067






















             

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