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xen-users
Re: [Xen-users] xend http interface
Anand a écrit :
Thanks Jean for the information.
I tried the the http://xendomain:8000/xend/domain/?detail=1, it shows
me exactly the same as http://xendomain:8000/xend/domain
If you try from a web-browser it's normal :) try to do it with a simple
network client (like telnet) :
telnet xenserver 8000
GET /xend/domain HTTP/1.1
will return you a list like this (dom0 domain-name1 domain-name2 ......)
AND
telnet xenserver 8000
GET /xend/domain/?detail=1 HTTP/1.1
will return you a list like this
((domain (domid 0)(uuid ......) .......)(domain (domid 1)............))
It's just because your browser puts a header like this : Accept:
text/html that makes xend recognize it as a browser and not another client
I will appreciate if you can you explain these parameter below ? Are
they related to cpu time scheduling for the domain ?
op=cpu_sedf_set&latency=nnn
&slice=nnn&period=nnn&weight=nnn&extratime=n
: réglage des paramètres sedf (xm sched-sedf)
Sorry i wrote it into french, cpu_sedf_set (and get too) is related to
cpu time scheduling for the domain and the different parameters are
quickly explained on xen wiki :
http://wiki.xensource.com/xenwiki/Scheduling (in the section sedf-scheduler)
regards,
--
Jean-David Silberzahn
ADVISEO
http://www.adviseo.fr/
http://www.open-sp.fr/
On 1/2/06, *Jean-David Silberzahn* <jds@xxxxxxxxxx
<mailto:jds@xxxxxxxxxx>> wrote:
I've not the complete list of commands for http interface, I try to
discover them when I need to use it ... If someone has this list
or know
where to find it, i would appreciate too to get this ...
However, the command I already found and use with the HTTP
interface are
those :
GET requests :
/xend/domain/ AND /xend/domain/?detail=1 : to get a list of all
started
nodes (detailed or not)
/xend/node : to get informations on the node on which xen runs (free
memory, number of cpu, ...)
POST requests on /xend/domain :
parameters : op=create&config=s-expression : to create a paused domU
with his config urlencoded in "s-expression" (s-expr = (domain (memory
128)(device (vbd (dev xvda1)(uname phy:device)(mode w))) ............)
POST requests on /xend/domain/domain-name :
parameters : op=wait_for_devices : command to wait for the devices
of a
newly created domU before unpausing it
parameters : op=unpause : unpause a domU (xm unpause)
parameters : op=pause : pause a domU (xm pause)
parameters : op=destroy : destroy a domU (xm destroy)
parameters : op=shutdown&reason=(halt|poweroff|reboot) : 3 different
ways to shutdown your domU
parameters :
op=cpu_sedf_set&latency=nnn&slice=nnn&period=nnn&weight=nnn&extratime=n
: réglage des paramètres sedf (xm sched-sedf)
I think it's possible to do migrations, save and restore, and many
other
things, but i have not searched how to use those commands
Another think to know when using the HTTP interface is that xend acts
differently depending on the headers (especially the Accept: HTTP
header) : if you don't put such a header, it will answer you with
s-expression (useful if you are developping something over xen for
example) and if you put one, you'll get an HTML formatted answer
(useful
to read it, even if the s-expressions mostly contains more
informations).
regards,
--
Jean-David Silberzahn
ADVISEO
http://www.adviseo.fr/
http://www.open-sp.fr/
Anand a écrit :
> Dear Jean,
>
> Thanks a lot for the help.
>
> Is there some kind of documentation for the complete list of
commands
> for http interface ? Alternatively if you have the list and
> explanation i would very appreciate if you can post it here.
>
> On 1/2/06, *Jean-David Silberzahn* <jds@xxxxxxxxxx
<mailto:jds@xxxxxxxxxx>
> <mailto:jds@xxxxxxxxxx <mailto:jds@xxxxxxxxxx>>> wrote:
>
> Anand a écrit :
>
> > While going through the manual i came to know that xend
has an http
> > interface which can be used to interact with xen. However
> searching on
> > the lists and googling only resulted in 3-4 posts on the
devel list
> > which still didn't have any information on the same.
> >
> > Is anyone using it ... ?
>
> We are using this interface to control the xend daemon. With
this
> interface, you can do quite everything you can with the xm
tool.
> For example to destroy a domain, you can do a HTTP POST
request on
> this
> url :
> http://xenserver:8000/xend/domain/domain-name
<http://xenserver:8000/xend/domain/domain-name>
> with parameter
> op=destroy
> To create a domainU, you can do a POST request on this url :
> http://xenserver:8000/xend/domain/
> with parameter
> op=create&config=s-expression
> s-expression is the xen configuration format (you can look at it
> making
> a xm list -l for example)
> To list started domains :
> http://xenserver:8000/xend/domain/
> or
> http://xenserver:8000/xend/domain/?detail=1
<http://xenserver:8000/xend/domain/?detail=1>
> <http://xenserver:8000/xend/domain/?detail=1>
>
> The http server don't exactly map xm commands however : to
boot a new
> server, you have 2 or 3 operations to do when using the http
server :
> create, wait_for_devices and unpause
>
> The xend HTTP interface is accessible via a TCP socket or
via an Unix
> socket (way used by xm in xen-3.0)
>
>
>
> regards,
>
> Anand
>
>------------------------------------------------------------------------
>
>_______________________________________________
>Xen-users mailing list
> Xen-users@xxxxxxxxxxxxxxxxxxx <mailto:Xen-users@xxxxxxxxxxxxxxxxxxx>
>http://lists.xensource.com/xen-users
>
regards,
Anand
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