similar to: reading a xenstore key from domU

Hey everyone, I''m trying to write a simple python program in dom0 that registers a watch on the xenstore to determine when a domU has shutdown. Is there a particular token I should use? Looking through the tools/python/xen/*.py code, I''ve come across the ''control/shutdown'' token... seems promising? My code is attached below. As is, if fails to call the

Hi, I want to know how everything communicates with XenStore. Do domUs use the front-end/back-end driver to dom0 and then the back-end driver contacts xenstored? In particular, how do the xenstore-* commands work on a dom0 and domU? And when should unix-domain sockets be used to communicate with xenstored? Thanks, Hayawardh _______________________________________________ Xen-users mailing

I want to create a custom directory something like a/b in the xenstore, i guess there are no domU commands for the same. So how can create this in dom0? Thanks -- View this message in context: http://xen.1045712.n5.nabble.com/Creating-a-custom-variable-in-xenstore-from-dom0-tp3365541p3365541.html Sent from the Xen - Dev mailing list archive at Nabble.com.

Hi, I encountered a problem while porting Solaris as a guest OS on Xen. The problem I found is that when frontend vbd driver get unloaded, it will close the vbd interface by changing the state to XenbusStateClosed. This appears to cause the dom0 hotplug scripts to remove the vbd entry from xenstore for the domU guest, preventing the vbd from being re-attached. So, my questions are: + This

Package: xen-utils-4.1 Version: 4.1.3-4 Severity: important Tags: patch Bug presented in sid, with patch attached. Similar bug is also present in stable and testing versions. How to reproduce: Install xen-utils-4.1 in a domU, and run: /etc/init.d/xen start Expected result: xenstored running (or to have any other easy way to get it running within a domU) xenstored is not just something

At least from the ''xm'' commands'' interface, it looks like domU''s just disappear after an ''xm destroy'', which I''ve been using to cut turn off the virtual power switches of domU''s. Is this by design? I''m trying to think of a good way to identify a domU throughout its lifecycle, which for me goes all the way from

All, Is there a way to setup serial communication between dom0 and domU. The idea is to have some way of exchanging messages between dom0 and domUs. Certainly, it is possible to use s host-only network, and ssh or shared file system to exchange data. However, there could be cases where the dom0 is not networked. You may want to automate configuring domUs from dom0. Any suggestions. Arijit

I''m looking at building a xenstore-based watchdog, as described at http://lists.xensource.com/archives/html/xen-users/2005-07/msg00597.html However, being somewhat new to xenstore, I''d appreciate some pointers. - What portions of the xenstore namespace should I use? I''m looking for at least two settings writable by the DomUs: A flag to enable/disable the watchdog

On Thu, 2005-06-16 at 06:17 +0100, Keir Fraser wrote: > > I suggested that we simply mmap /dev/kmem for the xenstored to access > > the domain0 page for the moment. That doesn''t work: we''ll do something > > else. > > Just use xc_map_foreign_range(), as you would for mapping any other > domain''s xenstore page. So here''s my patch

I got a strange problem: I need to get sysinfo() data from domU in my application, running in dom0. Right now I using a userspace daemon in every domU, updating information in xenstore, and my application read this information... But I think, it really strange: why we can not get those info directly from PV kernel without going to kernel and back to userspace multiple times? Is any way to get

Hi, I was wondering if somebody could help me! I''m trying to write to the xenstore from a domU and read what I have written from inside another domU. I seem to have some permission problems....? Is there a place within xenstore that anybody can write to and read from? Thanks Julian _______________________________________________ Xen-devel mailing list Xen-devel@lists.xensource.com

Good Afternoon, I''m using XenStore to make an experiment and share values between Dom''s U and Dom0. Since today I''m having problems with more than 300 entries per path. I dont know but last week I haven''t this problem. Anyone know the limitation of entries per path on XenStore? When I use it on Dom0 I don''t get any problem. Thanks -- Luciano Barreto

I am new to Xen and want to provide simple communication between my DomU and Dom0 environments. I just need to be able to pass a few bytes of information back and forth between DomU and Dom0 while using some form of event management to know when an update occurs so I can act on it. At first, it appeared that using XenBus and XenStore might be the right solution for this. However, after looking

Hi,     I am tring to write xenstore some information ,so that a guest can read, if i simply xenstore-write /foo "123" in domain 0, guest have not the permission to read this ,and guest domain number are dynamic, so i can not write a program to write /local/domain/X, which X is the domain id i want to export information to, can i ?     So, is there a path (a static path,without domain

Hello. Is it available a communication interface between Dom0 and DomU to get some parameteres about DomU without connection via ssh? For example i need to get information about IP addresses that are allocated in DomU. I found following mail-thread: http://xen.1045712.n5.nabble.com/How-to-get-domU-IP-address-td2510278.html Keir Fraser said about xenstore, but as i understand to use xenstore

Hey all, Can anyone give me pointers on how (or whether it''s possible) to set up a watch on an item in the xenstore from a userspace program in domU? Any help would be greatly appreciated. Thanks! ~Dave ____________________________________________________________________________________ Need a quick answer? Get one in minutes from people who know. Ask your question on

Hello, This patch allows userspace tools on a domU to setup a watch on the xenstore. It does this by intercepting XS_WATCH requests written to /proc/xen/xenbus and then re-submitting the request to the in-kernel xenstore interface, in linux-2.6-xen-sparse/drivers/xen/xenbus/xenbus_xs.c. When a callback occurs, an in-kernel function is invoked, which then reconstructs a response in the format

Hi, $subject says pretty much all, this patch updates netfront and makes it store the network addresses of the interfaces in xenstore, so it''s much easier to figure what IP some virtual machine has and (for example) ssh into it. comments? Gerd _______________________________________________ Xen-devel mailing list Xen-devel@lists.xensource.com

Hi, Creating a new domain is a lot easier in opensuse 11. I follow the instruction on the website and build a virtual machine which uses opensuse 11 as well (I installed it from iso image). Everything works fine except the network. I cannot access the Internet from DomU. Here is some information. P.S. the DomU id is 1. "brctl show" in Dom 0: bridge name bridge id STP

Hi All , I am using xen 3.2.0 which i have built form source ,I could initially boot Dom 0 and some DomUs. But today when i tried to boot a DomU with birdge enabled it didnt work giving an error .... Error: Device 0 (vif) could not be connected. Hotplug scripts not working. After that I checked my var/log/messages and It gave lots of xenstore-write