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+ <H1>[Mageia-dev] [soft-commits] [4017] Include persistent-storage udev rules ( needed for UUID info on root disks during install)</H1>
+ <B>Colin Guthrie</B>
+ <A HREF="mailto:mageia-dev%40mageia.org?Subject=Re%3A%20%5BMageia-dev%5D%20%5Bsoft-commits%5D%20%5B4017%5D%20Include%20persistent-storage%0A%20udev%20rules%20%28%20needed%20for%20UUID%20info%20on%20root%20disks%20during%20install%29&In-Reply-To=%3C4F8F1B34.3040506%40colin.guthr.ie%3E"
+ TITLE="[Mageia-dev] [soft-commits] [4017] Include persistent-storage udev rules ( needed for UUID info on root disks during install)">mageia at colin.guthr.ie
+ </A><BR>
+ <I>Wed Apr 18 21:51:16 CEST 2012</I>
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+<PRE>'Twas brillig, and Thierry Vignaud at 18/04/12 18:17 did gyre and gimble:
+&gt;<i> On 11 April 2012 10:41, Colin Guthrie &lt;<A HREF="https://www.mageia.org/mailman/listinfo/mageia-dev">gmane at colin.guthr.ie</A>&gt; wrote:
+</I>&gt;&gt;&gt;&gt;<i> Include persistent-storage udev rules (needed for UUID info on root disks
+</I>&gt;&gt;&gt;&gt;<i> during install)
+</I>&gt;&gt;&gt;<i>
+</I>&gt;&gt;&gt;<i> For the record, what does this fix?
+</I>&gt;&gt;<i>
+</I>&gt;&gt;<i> Sorry, I should have been more verbose.
+</I>&gt;&gt;<i>
+</I>&gt;&gt;<i> Basically because of the previous commit:
+</I>&gt;&gt;<i> <A HREF="http://svnweb.mageia.org/soft?view=revision&amp;revision=4014">http://svnweb.mageia.org/soft?view=revision&amp;revision=4014</A>
+</I>&gt;&gt;<i>
+</I>&gt;&gt;<i> We can now generate a &quot;hostonly&quot; initrd, i.e. a nice small, &quot;normal&quot;
+</I>&gt;&gt;<i> initrd that we typically produce, tailored for the system in question.
+</I>&gt;&gt;<i>
+</I>&gt;&gt;<i> As a fallout from this, when running the install with an encrypted root
+</I>&gt;&gt;<i> partition (and possibly just a normal LVM, not sure), various udev
+</I>&gt;&gt;<i> properties were not injected into the udev database. These properties
+</I>&gt;&gt;<i> (FS_UUID - can be seen via e.g. udevadm info --query=property
+</I>&gt;&gt;<i> --name=/dev/sda5) as needed by dracut to detect things properly (rather
+</I>&gt;&gt;<i> than resulting to lots of weird and wonderful probing methods dracut
+</I>&gt;&gt;<i> tries to use udev as it's primary source of info).
+</I>&gt;&gt;<i>
+</I>&gt;&gt;<i> So these rules ensured that the UUID of /dev/sd* partitions were
+</I>&gt;&gt;<i> available in udev.
+</I>&gt;<i>
+</I>&gt;<i> Maybe should we include them into rescue too, shouldn't we?
+</I>
+Yeah that makes sense IMO. Sorry I should have fixed it there too. We
+may also want to investigate whether or not we should &quot;fake&quot; a dracut
+boot (i.e. mount /run and make sure the folder /run/initramfs exists).
+The only real requirement is that all the necessary info is available in
+udev to generate an initrd. I think with the rules and with udev
+starting before any lvm/crypt commands then that should be fine.
+
+
+Longer term, I think we can maybe look to use dracut itself to create a
+rescue image itself (and maybe even stage1)... but that's for another day :D
+
+Col
+
+--
+
+Colin Guthrie
+colin(at)mageia.org
+<A HREF="http://colin.guthr.ie/">http://colin.guthr.ie/</A>
+
+Day Job:
+ Tribalogic Limited <A HREF="http://www.tribalogic.net/">http://www.tribalogic.net/</A>
+Open Source:
+ Mageia Contributor <A HREF="http://www.mageia.org/">http://www.mageia.org/</A>
+ PulseAudio Hacker <A HREF="http://www.pulseaudio.org/">http://www.pulseaudio.org/</A>
+ Trac Hacker <A HREF="http://trac.edgewall.org/">http://trac.edgewall.org/</A>
+</PRE>
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