Re: [Xen-users] [Xen-devel] Xen doesn't boot on grub2 or xend doesn't start

["Walter Robert Ditzler" <ditwal001@xxxxxxxxx>]

hi,

for boot order, if manually set:
***
update-rc.d xencommons defaults 19 18
update-rc.d xend defaults 20 21
update-rc.d xendomains defaults 21 20
update-rc.d xen-watchdog defaults 22 23
***

and dont forget in /etc/default/grub
***
# SET THE DEFAULT BOOT KERNEL, NUMBER COUNTED FROM THE TOP BEGINNING WITH 0
GRUB_DEFAULT=10
# SOMETIMES IS NICE TO HAVE FIX MEMORY ALLOCATION TO AVOID CRASHING IF ALL
MEMORY IS USED
GRUB_CMDLINE_XEN="dom0_mem=1024M"
***

thanks walter

-----Original Message-----
From: xen-users-bounces@xxxxxxxxxxxxx
[mailto:xen-users-bounces@xxxxxxxxxxxxx] On Behalf Of Pasi Kärkkäinen
Sent: Dienstag, 24. April 2012 15:00
To: José Eduardo França
Cc: xen-users@xxxxxxxxxxxxx; xen-devel@xxxxxxxxxxxxx
Subject: Re: [Xen-users] [Xen-devel] Xen doesn't boot on grub2 or xend
doesn't start

On Tue, Apr 24, 2012 at 09:54:26AM -0300, José Eduardo França wrote:
>    Pasi,
> 

This thread really belongs to xen-users mailinglist (added to CC).
So let's drop xen-devel from the CC list in the replies..


>    I didn't really understand when You said "I was talking about dom0
Linux
>    kernel, not about Xen", coz I understand you must be in xen to access
>    dom0.
>    Look: in my grub2 I have these options in grub2:
> 
>    Xen Unstable / Debian Squeeze kernel 2.6.32.40
>    Debian GNU/Linux, with Linux 2.6.32.40
>    Debian GNU/Linux, with Linux 2.6.32-5-686
> 

Please paste the entries from your grub.cfg

>    I select first option and the system returns:
> 
>    error: couldn't open file
>    error: you need to load the multiboot kernel first
> 

So the grub entry is broken. Please fix it.

>    The second option is in graphical environment but keyboard and mouse
don't
>    work there. I thought You said to enter within this option (but I think
>    this option is not important)
> 

Of course you need to boot to Xen to be able to use Xen.
I recommend using just the text-only modes.

>    And the third option is my environment where I compiled and installed
xen
>    and Debian GNU/Linux, with Linux 2.6.32.40.
>    Here I do command "# /etc/init.d/xend start" and the system returns
>    "xencommons should be started first", but I had done
>    "/etc/init.d/xencommons start" before and no error message returned
!!!???
> 

Did you realize Xen is the hypervisor (xen.gz), and in addition to Xen you
also need Xen-enabled Linux dom0 kernel ? 

http://wiki.xen.org/wiki/Xen_Common_Problems#Starting_xend_fails.3F


>    and then... what do you think?
> 


-- Pasi


>    Eduardo
> 
>    Em 23 de abril de 2012 13:45, José Eduardo França
<[1]jefranca@xxxxxxxxx>
>    escreveu:
> 
>      Pasi
> 
>      I didn't think this. I'll be in my job tomorrow an I'll reply there.
> 
>      Thank you
> 
>      Em 23 de abril de 2012 13:23, Pasi Kärkkäinen <[2]pasik@xxxxxx>
>      escreveu:
> 
>        On Mon, Apr 23, 2012 at 01:13:49PM -0300, José Eduardo França
wrote:
>        >    Hi Pasi,
>        >
>        >    thank you for reply.
>        >
>        >    I'm using Debian Squeeze, and I'm compiling Xen from source
>        (.tar.gz). I
>        >    ran "make install-tools PYTHON_PREFIX_ARG=" to install Xen.
>        >
>        >    Notice: I couldn't run in xen_unstable or dom0 then I returned
to
>        install
>        >    environment (Debian Squeeze)
>        >
>        >    My attempt with modules and now with xenstored command
>        (oxenstored command
>        >    works) was in Debian Squeeze. In this case I think I can't
load
>        these
>        >    modules or run this command, but I'm not sure. Then your
>        questions can not
>        >    be in this scope. What do you think?
>        >
> 
>        I was talking about dom0 Linux kernel, not about Xen.
> 
>        -- Pasi
> 
>        >    Thanks, Eduardo
>        >
>        >    Em 23 de abril de 2012 03:36, Pasi Kärkkäinen
>        <[1][3]pasik@xxxxxx> escreveu:
>        >
>        >      On Sun, Apr 22, 2012 at 04:21:10PM -0300, José Eduardo
França
>        wrote:
>        >      >    hi guys,
>        >      >
>        >
>        >      Hello,
>        >      >    It's my first time here and in a mailing lists, I only
>        participated
>        >      in
>        >      >    forums before. Please, If I make a mistake you should
>        advise me.
>        >      Let's go!
>        >      >
>        >      >    I was reading "xencommons not start" in a Remus Forum
in
>        order to
>        >      install
>        >      >    Remus.
>        >      >    Well* I followed the tutorial
>        >      >
>        >
>
<[1][2][4]http://remusha.wikidot.com/configuring-and-installing-remus>,
>        I
>        >      reboot
>        >      >    in xen_unstable and I had a error message:
>        >      >
>        >      >    error: couldn't open file
>        >      >    error: you need to load the multiboot kernel first
>        >      >
>        >      >    then I redid tutorial after "Adapt Grub" and in a
moment I
>        do
>        >      command:
>        >      >
>        >      >    # /etc/init.d/xend start
>        >      >    xencommons should be started first.
>        >      >
>        >      >    but I had done "/etc/init.d/xencommons start" before
and
>        no error
>        >      message
>        >      >    returned !!!???
>        >      >
>        >      >    I also tried insert modules manually (coz in other
mailing
>        list
>        >      said to
>        >      >    put some modules - see my setups after this mail) but I
>        had:
>        >      >
>        >      >    # modprobe xen-evtchn
>        >      >    FATAL: Module xen_evtchn not found.
>        >      >
>        >
>        >      So xen event channel support is not compiled as a module?
>        >      is it enabled at all in your dom0 kernel config?
>        >
>        >
>
[3][5]http://wiki.xen.org/wiki/Xen_Common_Problems#Starting_xend_fails.3F
>        >      -- Pasi
>        >
>        > References
>        >
>        >    Visible links
>        >    1. mailto:[6]pasik@xxxxxx
>        >    2.
[7]http://remusha.wikidot.com/configuring-and-installing-remus
>        >    3.
>        
> [8]http://wiki.xen.org/wiki/Xen_Common_Problems#Starting_xend_fails.3F
> 
> References
> 
>    Visible links
>    1. mailto:jefranca@xxxxxxxxx
>    2. mailto:pasik@xxxxxx
>    3. mailto:pasik@xxxxxx
>    4. http://remusha.wikidot.com/configuring-and-installing-remus
>    5. http://wiki.xen.org/wiki/Xen_Common_Problems#Starting_xend_fails.3F
>    6. mailto:pasik@xxxxxx
>    7. http://remusha.wikidot.com/configuring-and-installing-remus
>    8. 
> http://wiki.xen.org/wiki/Xen_Common_Problems#Starting_xend_fails.3F

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