[ovirt-users] Error while using REST API with Ovirt
Chandrahasa S
chandrahasa.s at tcs.com
Tue Sep 23 04:39:01 UTC 2014
Dear Juan,
Thanks lot for support.
Internal server error issue also resolved with linux guests. Now we are
able to provide ip and hostname to linux guests in rhev 3.4 successfully
via RESTAPI giving boot protocol as "static" as advised.
For Windows Guest we did the following:
1) Prepared a template with guest agents installed and deployed a vm
successfully through RESTAPI.
2) Following initialization part same as Linux guest did not work in
this case and it gives default/garbage ip,hostname to the vm.
3) So we tried giving it through sysprep/payload tag through REST
API. Code snippet is as follows:
HttpPut put = new HttpPut(
"
https://rhevmanager/api/vms/7dac74d2-c504-4bbd-8659-c8773a844cb3/");
String inputXML1 = "<?xml version=\"1.0\"?>"
/*"<vm>"*/
+"<sso>"+"<methods>"+"<method
id=\""+"GUEST_AGENT"+"\"/>"+"</methods>"+"</sso>"
+"<domain>"+"<name>ultimatixuat.net</name>"+"</domain>"
+"<payloads>"+"<payload
type=\""+"floppy"+"\">"+ "<files>"+"<file>"
+"<name>/WEB-INF/sysprep.xml</name>"
+"</file>"+"</files>"+"</payload>"+"</payloads>"
+"<reported_devices>"+"<reported_device>"+"<ips>"+"<ip
address=\""+"1.1.1.1"+"\"/</ips>"
+"<fqdn>WIN-AS05EOADAwerwer</fqdn>"+"</reported_device>"+"<reported_devices>";
StringEntity input1 = new StringEntity(inputXML1);
put.setEntity(input1);
put.setHeader("Content-Type", "application/xml");
HttpResponse responseNIC =
httpclient.execute(put);
System.out
.println("RESPONSE
::::::::::::::::::::::::::::::::::: "
+ responseNIC);
BufferedReader rd1 = new BufferedReader(new
InputStreamReader(
responseNIC.getEntity().getContent()));
String line1 = "";
while ((line1 = rd1.readLine()) != null) {
System.out.println("LINE ::::::::::::: " +
line1);
}
The output says that my code is syntactically incorrect. I am not
very sure as to what has to be the content of "sysprep.xml" file and what
is syntactically incorrect here.
Also while deploying the windows machine manually through the rhev
manager , while using sysprep option in "run once" , I am unable to find
the ip and hostname options as found for linux machines.
Regards,
Chandrahasa S
From: Juan Hernandez <jhernand at redhat.com>
To: Chandrahasa S <chandrahasa.s at tcs.com>
Cc: Agarwal Ruchita <agarwal.ruchita at tcs.com>, users at ovirt.org,
"'Shahar Havivi'" <shavivi at redhat.com>
Date: 09/18/2014 06:30 PM
Subject: Re: [ovirt-users] Error while using REST API with Ovirt
On 09/18/2014 01:39 PM, Chandrahasa S wrote:
> Dear Juan / All,
>
> Thanks for reply.
>
> I tried to give the hostname with the tag mentioned "host_name". Its
> working.
>
> So below are the issues still remaining:
>
> 1) The issue of internal server error still persits (rhev
> manager showing issues) even after following the advice of the expert
> and doing the initialization part just once(giving ip and
> hostname) after creating the vm.
>
Actually this is a bug:
https://bugzilla.redhat.com/1144005
The reason is that when you use an incorrect boot protocol we end up
storing null in the corresponding place in the database, and later we
use the value without checking it, which triggers a null pointer
exception.
The right value for the boot protocol is "static", not "STATIC_IP". The
"STATIC_IP" value is what we use in the backend and in the database, but
in the RESTAPI it is "static".
To workaround this issue you can delete the VMs and create them again
with the correct boot protocol.
If you don't want to create the VMs again you can fix the database
manually like this:
# su - postgres
# psql
postgres=# \c engine
engine=# update vm_init set networks = replace(networks, '"bootProtocol"
: null', '"bootProtocol" : "STATIC_IP"');
> 2) Please confirm if this is the case that we can do
> initialization part only once on a particular vm , then we can
> reconfigure the network (ip, subnet, gateway etc)
> or not for that vm.
>
I'm reasonably sure that you can run initialization only once per VM,
but Shahar can confirm this better than me.
> 3) For Windows guest we are still unable to provide ip details
> and hostname using sysprep/payload.
>
I'm not familiar with Sysprep. Can you provide an example of the code
that you are using for that?
> Error attached.
>
>
>
> Regards,
> Chandrahasa S
>
>
>
> From: Juan Hernandez <jhernand at redhat.com>
> To: Chandrahasa S <chandrahasa.s at tcs.com>, users at ovirt.org
> Cc: Agarwal Ruchita <agarwal.ruchita at tcs.com>
> Date: 09/18/2014 03:35 PM
> Subject: Re: [ovirt-users] Error while using REST API with Ovirt
> ------------------------------------------------------------------------
>
>
>
> On 09/18/2014 08:18 AM, Chandrahasa S wrote:
>> Dear Experts.
>>
>> We are Integrating our internal cloud portal with Ovirt / RHEVM
version
>> 3.4.
>>
>> We are integrating our internal cloud with Ovirt / RHEVM. VM template
>> created using cloud init.
>>
>> Through REST API Nippet while codes passes command to template ( with
>> cloud init) IP, HOSTNAME, We are able to set IP and Hostname to VM
>> through code.
>>
>> But post this Manager getting handed. Error code is attached.
>>
>> Need your help please.
>>
>
> If I understand correctly you already created a template with the cloud
> init configuration, then you created a VM from that template, and you
> want to modify it and start it. In order to update the VM you need to
> issue a PUT request, and the tag name for the host is "host_name":
>
> String updateXml =
> "<?xml version=\"1.0\"?>"
> + "<vm>"
> + "<initialization>"
> + "<host_name>meghaasadmin.ultimatixuat.net</host_name>"
> + "<regenerate_ssh_keys>false</regenerate_ssh_keys>"
> + "<nic_configurations>"
> + "<nic_configuration>"
> + "<name>eth0</name>"
> + "<ip address=\"1.1.1.1\" netmask=\"255.255.255.0\"
> gateway=\"13.3.3.3\"/>"
> + "<boot_protocol>static</boot_protocol>"
> + "<on_boot>true</on_boot>"
> + "</nic_configuration>"
> + "</nic_configurations>"
> + "</initialization>"
> + "</vm>";
> StringEntity updateEntity = new StringEntity(updateXml);
> HttpPut updateRequest = new HttpPut(apiUrl + "/vms/" + vmId);
> updateRequest.setHeader("Content-Type", "application/xml");
> updateRequest.setHeader("Accept", "application/xml");
> updateRequest.setEntity(updateEntity);
> HttpResponse updateResponse = client.execute(updateRequest);
>
> Then, after the update, you need to start the VM and it will use that
> configuration:
>
> String startXml =
> "<?xml version=\"1.0\"?>"
> + "<action/>";
> StringEntity startEntity = new StringEntity(startXml);
> HttpPost startRequest = new HttpPost(apiUrl + "/vms/" + vmId +
> "/start");
> startRequest.setEntity(startEntity);
> startRequest.setHeader("Content-Type", "application/xml");
> startRequest.setHeader("Accept", "application/xml");
> HttpResponse startResponse = client.execute(startRequest);
>
> Some advices:
>
> * Check the XML schema for the structure of the XML documents:
>
> https://rhevmanager/api?schema
>
> * When sending requests to the RESTAPI makes sure to always explicitly
> add the Content-Type and Accept headers:
>
> yourRequest.setHeader("Content-Type", "application/xml");
> yourRequest.setHeader("Accept", "application/xml");
>
> * Take into account that the initialization with cloud-init will only be
> executed the first time you start the VM, so in your tests you will need
> to remove the VM and create it again.
>
> * If you are planning to do complex things you may find it helpful the
> Java SDK:
>
> http://www.ovirt.org/Java-sdk
>
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