Xen users - Feb 2013 - How to auto start DomU after reboot of Dom0?

Hello all,

    I followed some tutorials to install Xen in a Debian Squeeze server.
One of them [1] says to set up XENDOMAINS_RESTORE to false, because I can
have problems with that. So, if my server shuts down or reboots how can I
configure my VM to automatically start?

    Yesterday I did a quick script [2] that worked well, but I am not sure
if it is the best way to do it. I would like to know what you do solve this
issue.

[1] - http://wiki.debian.org/Xen#Other_configuration_tweaks

[2] - Script:

#!/bin/bash

# Start all the VMs from here
VMS="/etc/xen/*.cfg"

for vm in $VMS
do

  if [ -e "$vm" ]                      # Check if file exist
  then
    data=`date ''+%d/%m/%Y - %H:%M:%S''` # Current date/time
(log purposes)
    echo "starting at: $data"
    /usr/sbin/xm create $vm            # Create VM
    sleep 15                           # Wait 15 sec to start the next
    echo
    continue                           # Next VM
  fi

  echo "Nothing to be done..."

done

exit 0


Regards,

-------------------------------
Carlos Eduardo Ribas


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Hello.

El 06/02/13 07:18, Carlos Ribas escribió:
>      I followed some tutorials to install Xen in a Debian Squeeze
> server. One of them [1] says to set up XENDOMAINS_RESTORE to false,
> because I can have problems with that. So, if my server shuts down or
> reboots how can I configure my VM to automatically start?
That option has to do with Xen''s feature to save/restore the domains, 
instead of shutdown/startup. A close equivalent in baremetal computing 
would be suspend/resume.
>      Yesterday I did a quick script [2] that worked well, but I am not
> sure if it is the best way to do it. I would like to know what you do
> solve this issue.
Squeeze''s Xend provides a very simple way to autostart the domains, 
regardless they was saved or shot down. Check /etc/defaults/xendomains 
file, it''s heavily commented, particularly XENDOMAINS_AUTO section.
Note
that you will have to create the directory /etc/xen/auto manually.
I usually put there symbolic links to config files (that are stored 
directly under /etc/xen), instead of the configuration files themselves.

Greetings.

-- 
Alexandre Kouznetsov

You could also start them using cron like below:

@reboot xm create vm.cfg

Regards
M

 myPhone''dan gönderdim

6 Şub 2013 tarihinde 17:28 saatinde, Alexandre Kouznetsov
<alk@ondore.com> şunları yazdı:
> Hello.
>
> El 06/02/13 07:18, Carlos Ribas escribió:
>>     I followed some tutorials to install Xen in a Debian Squeeze
>> server. One of them [1] says to set up XENDOMAINS_RESTORE to false,
>> because I can have problems with that. So, if my server shuts down or
>> reboots how can I configure my VM to automatically start?
> That option has to do with Xen''s feature to save/restore the
domains, instead of shutdown/startup. A close equivalent in baremetal computing
would be suspend/resume.
>
>>     Yesterday I did a quick script [2] that worked well, but I am not
>> sure if it is the best way to do it. I would like to know what you do
>> solve this issue.
> Squeeze''s Xend provides a very simple way to autostart the
domains, regardless they was saved or shot down. Check /etc/defaults/xendomains
file, it''s heavily commented, particularly XENDOMAINS_AUTO section.
Note that you will have to create the directory /etc/xen/auto manually.
> I usually put there symbolic links to config files (that are stored
directly under /etc/xen), instead of the configuration files themselves.
>
> Greetings.
>
> --
> Alexandre Kouznetsov
>
>
> _______________________________________________
> Xen-users mailing list
> Xen-users@lists.xen.org
> http://lists.xen.org/xen-users

Hello,

    As I thought, there is a simple way to do it. Thanks Alexandre!

    Muzaffer, we have only to check if xend starts first, if not this will
not work. Probably a "sleep" helps. Thank you.

Regards,

-------------------------------
Carlos Eduardo Ribas



2013/2/6 Muzaffer Tolga Ozses <tolga@ozses.net>
> You could also start them using cron like below:
>
> @reboot xm create vm.cfg
>
> Regards
> M
>
>  myPhone''dan gönderdim
>
> 6 Şub 2013 tarihinde 17:28 saatinde, Alexandre Kouznetsov
> <alk@ondore.com> şunları yazdı:
>
> > Hello.
> >
> > El 06/02/13 07:18, Carlos Ribas escribió:
> >>     I followed some tutorials to install Xen in a Debian Squeeze
> >> server. One of them [1] says to set up XENDOMAINS_RESTORE to
false,
> >> because I can have problems with that. So, if my server shuts down
or
> >> reboots how can I configure my VM to automatically start?
> > That option has to do with Xen''s feature to save/restore the
domains,
> instead of shutdown/startup. A close equivalent in baremetal computing
> would be suspend/resume.
> >
> >>     Yesterday I did a quick script [2] that worked well, but I am
not
> >> sure if it is the best way to do it. I would like to know what you
do
> >> solve this issue.
> > Squeeze''s Xend provides a very simple way to autostart the
domains,
> regardless they was saved or shot down. Check /etc/defaults/xendomains
> file, it''s heavily commented, particularly XENDOMAINS_AUTO
section. Note
> that you will have to create the directory /etc/xen/auto manually.
> > I usually put there symbolic links to config files (that are stored
> directly under /etc/xen), instead of the configuration files themselves.
> >
> > Greetings.
> >
> > --
> > Alexandre Kouznetsov
> >
> >
> > _______________________________________________
> > Xen-users mailing list
> > Xen-users@lists.xen.org
> > http://lists.xen.org/xen-users
>
> _______________________________________________
> Xen-users mailing list
> Xen-users@lists.xen.org
> http://lists.xen.org/xen-users
>

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