Thanks George and Dave for explanation. I was trying to implement a live password reset utility. I think I'll force VM to reboot which is working :)
Cheers, RJ On Thu, Jan 19, 2012 at 11:47 PM, George Shuklin <[email protected]>wrote: > > Ah, ok, you didn't mention XenAPI. Those fields is not a 'real time > communication way'. If you need to have it, you need to create your own > xenstore-based application to be ran in dom0. Or create xapi plugin for > this. > > This is not really 'API-like', but my experience (we performs about > 100-150 writes/reads per second on every host in cloud) says this is single > way to have nice real-time communication with domU via xenstore. > > pitfall: > Note that VM can reboot itself (new domain - no 'foreign' data in > xenstore). Same for migration - every migration move VM to new domain. > > > On 19.01.2012 20:33, R J wrote: > > > > On Thu, Jan 19, 2012 at 5:44 PM, George Shuklin > <[email protected]>wrote: > >> What 'correct data' you mean? If you write data/foo "bar" from domU you >> can read them from dom0 as /local/domain/$domid/data/foo >> > > I'm using API VM.add_to_xenstore_data to add data to a running domU which > is reflected in > xe vm-param-get param-name=xenstore-data uuid=UUID_OF_VM but if I do > "xenstore-ls data" in domU then it does not reflect the updated/new entries. > > If I reboot the domU then it is able to show updated entries with same > "xenstore-ls data" command. > > >> >> On 18.01.2012 18:31, R J wrote: >> >> Hello List, >> >> I'm not able to fetch correct xenstore data in guest. If I reboot the >> guest then it loads with latest xenstore data but if I change the content >> of xenstore data while the VM is running then the data does not reflect in >> guest. >> >> Is this normal or am I missing anything ? >> >> >> Note: XCP version 1 and guest tools are installed. >> >> - RJ >> >> >> _______________________________________________ >> xen-api mailing >> [email protected]http://lists.xensource.com/mailman/listinfo/xen-api >> >> >> >> _______________________________________________ >> xen-api mailing list >> [email protected] >> http://lists.xensource.com/mailman/listinfo/xen-api >> >> > >
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