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Re: can't get guests other than netbsd working

I was successful with ubuntu. It is rather old, but at least its a start. And after this I think I see where I may have gone wrong with the others.

edgar@ubuntu:~$ uname -a
Linux ubuntu 3.13.0-170-generic #220-Ubuntu SMP Thu May 9 12:40:49 UTC 2019 x86_64 x86_64 x86_64 GNU/Linux

On 01/26/20 13:02, Manuel Bouyer wrote:
On Sun, Jan 26, 2020 at 12:48:22PM -0600, Edgar Pettijohn wrote:
I have tried:

alpine linux
debian linux

I am able to install all three, however trying to boot the installed system
seems impossible. I was able to get the furthest with alpine. I compiled
grub2 manually and used it to create `grub-x86_64-xen.bin' to use as the
`kernel = ' line in the config. However, this brings me to a grub> prompt.
Of which I am able to find the kernel and initrd and get it to load.

grub> linux (xen/xvda,msdos1)/boot/vmlinuz-virt
grub> initrd (xen/xvda,msdos1)/boot/initramfs-virt
grub> boot

lots of output...
Alpine Init 3.4.5-r0
[    1.723909] random: fast init done
  * Loading boot drivers: [    1.729482] loop: module loaded
  * Mounting boot media: failed.
initramfs emergency recovery shell launched. Type 'exit' to continue boot
sh: can't access tty; job control turned off
/ # exit
switch_root: can't execute '/sbin/init': No such file or directory
[   45.845042] Kernel panic - not syncing: Attempted to kill init!
[   45.845052] CPU: 0 PID: 1 Comm: busybox Not tainted 5.4.12-1-virt
[   45.845057] Call Trace:
[   45.845075]  dump_stack+0x66/0x90
[   45.845081]  panic+0xfc/0x2c0
[   45.845088]  do_exit.cold+0x20/0xbb
[   45.845094]  ? vfs_write+0x16a/0x190
[   45.845097]  do_group_exit+0x35/0xa0
[   45.845101]  __x64_sys_exit_group+0xf/0x10
[   45.845105]  do_syscall_64+0x49/0x120
[   45.845110]  entry_SYSCALL_64_after_hwframe+0x44/0xa9
[   45.845114] RIP: 0033:0x7f34ee8f472d
[   45.845118] Code: eb ef 48 8b 76 28 e9 e2 37 00 00 64 48 8b 04 25 00 00
00 00 48 8b b0 b0 00 00 00 e9 af ff ff ff 48 63 ff b8 e7 00 00 00 0f 05 <ba>
3c 00 00 00 48 89 d0 0f 05 eb f9 48 83 ec 38 bf 06 00 00 00 e8
[   45.845126] RSP: 002b:00007fffa9d2b8e8 EFLAGS: 00000246 ORIG_RAX:
[   45.845131] RAX: ffffffffffffffda RBX: 00007fffa9d2bc38 RCX:
[   45.845135] RDX: 0000000000000000 RSI: 0000000000000000 RDI:
[   45.845138] RBP: 0000556ef0eceb55 R08: 0000000000000000 R09:
[   45.845142] R10: 0000000000000000 R11: 0000000000000246 R12:
[   45.845147] R13: 00007fffa9d2bc50 R14: 0400000100003e00 R15:
[   45.845154] Kernel Offset: disabled

There is probably some other grub command I need to issue, but either way
this would be a horrible way to have to start it each time.

Attempting to use pygrub as the bootloader gets me the following:

libxl: error: libxl_bootloader.c:649:bootloader_finished: Domain
5:bootloader failed - consult logfile /var/log/xen/bootloader.5.log
          libxl: error: libxl_exec.c:118:libxl_report_child_exitstatus:
bootloader [7302] exited with error status 1
                                 libxl: error:
libxl_create.c:1267:domcreate_rebuild_done: Domain 5:cannot (re-)build
domain: -3
                                             libxl: error:
libxl_domain.c:1034:libxl__destroy_domid: Domain 5:Non-existant domain
libxl: error: libxl_domain.c:993:domain_destroy_callback: Domain 5:Unable to
destroy guest
libxl: error: libxl_domain.c:920:domain_destroy_cb: Domain 5:Destruction of
domain failed

I'm guessing I could probably get the same results with debian, but I didn't
try as hard. FreeBSD was difficult to install and ended with an unbootable
system as well.

I'm guessing it is possible to install other guests, but I can't seem to
find the magical incantation to do so.
In my experience recent linux distribution (or not so recent - e.g. RHEL 7)
dropped plain PV Xen support, and relies on HVM.

I've no problems with RHEL6 and loading either kernel/initrd from
the Xen config file, or using pygrub.

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