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.
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.
