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On Tue, Nov 11, 2014 at 09:56:09PM +0100, Michael Mair-Keimberger wrote: |
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> Today I've started to play around with systemd but so far I couldn't get |
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> it to boot. I've followed the how to from the gentoo wiki [1], but I |
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> stuck somehow. |
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I found systemd to be rather tricky to implement on some of my systems, |
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but this was a while ago and was in a more complex configuration that |
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you're using (though as most people are suggesting, I used dracut to |
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generate my initrd). |
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I would also suggest to use either dracut or genkernel-next to generate |
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an initramfs if you wanted to go down that path. Note that |
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sys-kernel/genkernel (as opposed to sys-kernel/genkernel-next) can have |
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issues with systemd (the last time I tried it it complained about |
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systemd and suggested using genkernel-next). |
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If you would prefer a hand-rolled one, I can't offer much, but as I |
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think has already been suggested, one key point is to call the correct |
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binary. |
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The systemd binary itself is /usr/lib/systemd/systemd, though calling |
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/sbin/init may work if that's configured in such a way as to launch |
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systemd. |
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The other point I might add is that my system, which uses dracut, has |
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systemd launched with some specific arguments: |
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ps -fp 1 |
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UID PID PPID C STIME TTY TIME CMD |
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root 1 0 0 11:31 ? 00:00:00 |
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/usr/lib/systemd/systemd --switched-root --system --deserialize 18 |
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This may be relevant when creating your own initramfs. |
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> First of all, with systemd installed I can't install lvm2 with the |
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> static use flag anymore, which is mandatory for being able using it for |
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> a initramfs. Why isn't that possible? How can I use the lvm binaries for |
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> my initramfs? |
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Again, as I think has been mentioned, the 'static' use flag is typically |
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a shortcut for easily building an initrd. Provided you include all the |
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dependencies of a given binary (as seen with `ldd /path/to/binary`) you |
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don't need static binaries. |
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> This lead me to my second question. At the wiki, the only way to create |
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> an initramfs for systemd was with genkernel (genkernel --udev --lvm). |
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> While the command itself is pretty useless (it's `genkernel --udev --lvm |
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> initramfs` if you want to create the initramfs -> is this a bug??) i |
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> also would like to use my own initramfs. |
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I'm not sure what you mean by the command is useless and is a bug. |
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Genkernel has multiple potential targets - 'all' for building the kernel |
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and initrams, 'kernel' for the kernel binary and modules, 'initramfs' |
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for just the initramfs image, etc. This command should generate an |
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initramfs with the required components for systemd, udev and lvm. |
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Hopefully some of this will help clear things up a little. |
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Cheers. |
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-- |
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wraeth <wraeth@×××××××××.au> |
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GnuPG Key: B2D9F759 |
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