Re: [gentoo-releng] Re: Seek for your advices : Make Gentoo LiveCD for ppc64le

[Kevin Zhao]

Hi Mike,
     Thanks for responding and help.

>
> > Hi All :
>
> Hi Kevin,
>
> First let me say I haven't heard back from osuosl so I need to bug them
> about our node!

Leno will track this .And I think he has responded you .I will double ask  the
guys who is responsible for this.

>
>
> >      Long Time No See~Hope everything goes well:-)
> >      Recently I am working on making ppc64le Gentoo Livecd. Now the newest
> > status is as below:
> >      1 .I have followed catalyst , build--> livecd-stage1 and
> > livecd-stage2.
> >      2. Replace the bootloader from yaboot to grub.
> >      3. The grub binaries I have copyed from Rhel7.1-ppc64le
> >      4. Change the boot_info.txt to a new one from Rhel7.1-ppc64le
> >      5. Build a squashfs images.
> >      6. Build a kernel and initramfs (I have check that the kernel is good
> > when using it replace a ubuntu-ppc64le kernel .)
> >      7. use command "mkisofs -v -r -T -U -l -cache-inodes -chrp-boot -V {
> > clst_iso_volume_id} -o gentoolive.iso /path/" to generate a Livecd.
>
> This sounds correct, but I don't build my bootable isos with catalyst.
> I do it the manual way or using GRS.

 I has submit 3 patches of this.Make catalyst make the ppc64le iso smoothly.The
3 patches cover : new bootloader cdtar ,new bootinfo.txt ,new arch
ppc64le, and new
parameters of mkisofs for ppc64le.


>
>
> >
> >     Now when loading iso to a guests, I can enter into grub, but have meet
> >  problem when initramfs runs:* Couldn't mount /dev/sr0*
>
> if you can get to the shell take a look what's in /dev.  you may need to
> tweak the kernel.  i don't think this is due to the above.  to get to
> the shell, when you get to the point where it says that it can't mount
> /dev/sr0, it says do you want to drop to a shell, type "shell" and youll
> get a very basic ash shell.
>
> let me know, or i can take a look at the image for you.
>

Thanks for you kindly help.I have successfully booted from liveCD and solve the
problem that can not mount the /dev/sr0. It is something wrong with
the initramfs.
The initramfs has not loaded some essential driver module for cdrom .
I have used a new available initramfs and solved this problem.

The LiveCD has successfully booted in power7 and power8 KVM.

>
> >
> > The *grub.cfg* file is as below:
> > =============================================================================================================
> >
> > set default=0
> > set timeout=10
> >
> > echo -e "\nWelcome to the Gentoo PPC64LE!\n\n"
> >
> > menuentry "Gentoo PPC64LE" {
> >  * linux /boot/vmlinux-4.2.1-aufs root=/dev/ram0 init=/linuxrc
> > looptype=squashfs loop=/image.squashfs  cdroot ro
> >                           *
> > *  echo 'Loading initial ramdisk ..............'*
> > *  initrd /boot/initramfs-genkernel-ppc64le-4.2.1-aufs*
> > }
> >
> > menuentry 'Reboot' {
> >   reboot
> > }
> >
> > menuentry 'Exit to Open Firmware' {
> >   exit
> > }
> > ==============================================================================================================
> >
> >    I have loaded it with a guest,guest xml file is here(add two iso just
> > for  compared,one is Gentoo and one is ubuntu ) :
> > https://bpaste.net/show/271874e8ca8b
> >    But the initramfs will bolcked when mount cdrom device. The error log
> > Link is: https://bpaste.net/show/f029aff8e633
> >    You can see that , mount -t auto /dev/sr0 /mnt/cdrom  failed.
> >    *Also, I enter into busybox, manally use command "mount -t iso9660
> > /dev/sr0 /mnt/cdrom", it shows "No such device"*
> > [image: 内嵌图片 1]
> >   * ls -l /dev/ :*
> > *   Find that there are :    "/dev/sr0   /dev/sr1",but there is no
> > "/dev/cdrom"*
> > *   But I 'm sure that kernel has the module "sr_mod" and "cdrom". Because
> > we have used this kernel and stage3 to make a workable gentoo image(running
> > in KVM).*
> >
> > *So, *now I am thinking of asking you for some advice.I've blocked here for
> > about 2 weeks .Any advice will be really appreciated. Loooooooking forwards
> > to your reponse   :-)
> >

> > 2015-10-28 13:26 GMT+08:00 Kevin Zhao <kevin.zhaoshuai@×××××.com>:
> >
> >> Hi  Mike && Hi Folks,
> >>       First I want to thanks for your help and advices , we have finish
> >> make gentoo stage3 and it will be tests by our community.
> >>       Now I  am working for  gentoo LiveCD using stage3 .   After
> >> searching gentoo website, I can not find a very clearly method to make
> >> gentoo LiveCD .
> >>       So ,if conveniently , could you give me some advices or some
> >> websites which cover the methods to LiveCD of other arch(e.g : x86 ,amd64
> >> etc..)
> >>       Thanks very much ~   :-)
> >>
>
>
> --
> Anthony G. Basile, Ph.D.
> Gentoo Linux Developer [Hardened]
> E-Mail    : blueness@g.o
> GnuPG FP  : 1FED FAD9 D82C 52A5 3BAB  DC79 9384 FA6E F52D 4BBA
> GnuPG ID  : F52D4BBA
>
>