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[Xen-users] Get parameters from dom0 to domu on domu start

  • To: xen-users@xxxxxxxxxxxxxxxxxxx
  • From: Eugene Istomin <eastman@xxxxxxx>
  • Date: Wed, 27 Jul 2011 11:10:57 +0300
  • Delivery-date: Wed, 27 Jul 2011 08:14:47 -0700
  • List-id: Xen user discussion <xen-users.lists.xensource.com>


I have a question about dom0<->domu xenstore interaction.

Assume, we have some pv domu with some logic inside 
"if grep -Fxq "echo noop > \/sys\/block\/$DISK\/queue\/scheduler" 
  echo "$DISK exist in $INIT_BOOTLOCAL" 
  echo "echo noop > \/sys\/block\/$DISK\/queue\/scheduler" >> 
fi "

'Cos of many gw/mtu/zabbix/bacula parameters we need to know all of this 
parameters on domu side before init 1. Assume we have some xenstore custom 
structure in xenstore, that describes thoose parameters.

Is it possible to run some custom script from dom0 on domu start which:
1) get some extra info form config file (network name, domain name, etc)
2) copy some parameters from one xenstore tree (custom) to another 

AFAK 1) is resolved by extra=".." in xm/xl config
What about 2)?

Best regards,
Eugene Istomin

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