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[libvirt-users] libvirt: C++ or Java?
by Ganesh Pagade 12 Apr '10

12 Apr '10

Hello, I am planning to develop a management application for managing Redhat Xen and Redhat KVM hypervisors. I am evaluating the Java bindings versus the C++ version of libvirt. As part of evaluation, I could not find meaningful answers to the questions below. Hence, I thought that people on this mailing list would be the most appropriate to comment on them. Can you please let me know your views? 1. Are all functions that are available in C API available in Java? 2. Are Java bindings added along with every enhancement to C API? 3. If answer to above question is negative, typically how long does it takes for the addition of Java bindings for the enhancement? 4. Most of libvirt based third party management applications use which of Java bindings or C API? 5. What are your good/bad experiences while using either of C API or Java bindings? 6. What is your concluding personal recommendation? And finally, since libvirt is a Redhat Emerging Technology project, does Redhat or any other third party service providers provide paid assistance, support? Appreciate your time. Thanks. Regards, Ganesh

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[libvirt-users] virt-top not showing disk and network usage
by Neil Aggarwal 11 Apr '10

11 Apr '10

Hello: I installed virt-top from epel onto my CentOS 5.4 host running KVM. When I run virt-top, it shows me the CPU and memory usage of the VMs, but the disk and network colums are empty. I found this page: http://people.redhat.com/~rjones/virt-top/faq.html That states it depends on what is supported by libvirt and the hypervisor. Is this implemented in KVM? If not, anyone have any info on when it will be? Thanks, Neil -- Neil Aggarwal, (281)846-8957 FREE trial: cPanel VPS with unmetered bandwidth http://UnmeteredVPS.net/cpanel

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[libvirt-users] [libvirt] [LXC] Tyring to locate livbvirt operations for LXC relocation
by Avi Weit 11 Apr '10

11 Apr '10

Hello, I am searching for the libvirt operations for relocating LXC (system or application) containers. LXC relocation mechanism is done by checkpoint / restart. I went over libvirt API documentation and found the following methods: virDomainSave that receives a domain and path to state file. The method saves domain's memory contents into a disk file. virDomainRestore that receives a domain and path to state file. The method restores the domain from the state file created by save operation. Are these the proper methods to use for LXC relocation? I assume I can also use the corresponding operations via virsh (save / restore).. >From looking into lxcDriver object (defined under /src/lxc/xlc_driver.c in libvirt server source) I can see that NULLs are set in save and restore methods. Does that mean that there is no support for saving and restoring Linux containers? Is there a libvirt patch beyond the kernel patch that needs to be applied? I am using libvirt 0.7.5 and kernel 2.6.31 /* Function Tables */ static virDriver lxcDriver = { VIR_DRV_LXC, /* the number virDrvNo */ "LXC", /* the name of the driver */ lxcOpen, /* open */ lxcClose, /* close */ NULL, /* supports_feature */ NULL, /* type */ lxcVersion, /* version */ NULL, /* libvirtVersion (impl. in libvirt.c) */ virGetHostname, /* getHostname */ NULL, /* getMaxVcpus */ nodeGetInfo, /* nodeGetInfo */ lxcGetCapabilities, /* getCapabilities */ lxcListDomains, /* listDomains */ lxcNumDomains, /* numOfDomains */ lxcDomainCreateAndStart, /* domainCreateXML */ lxcDomainLookupByID, /* domainLookupByID */ lxcDomainLookupByUUID, /* domainLookupByUUID */ lxcDomainLookupByName, /* domainLookupByName */ lxcDomainSuspend, /* domainSuspend */ lxcDomainResume, /* domainResume */ lxcDomainShutdown, /* domainShutdown */ NULL, /* domainSave */ NULL, /* domainRestore */ NULL, /* domainMigratePrepare */ NULL, /* domainMigratePerform */ NULL, /* domainMigrateFinish */ ... ... Thanks, - Avi

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[libvirt-users] libvirt: C++ or Java
by Gokhale, Shashibhushan 11 Apr '10

11 Apr '10

Hello, I am planning to develop a management application for managing Redhat Xen and Redhat KVM hypervisors. I am evaluating the Java bindings versus the C++ version of libvirt. As part of evaluation, I could not find meaningful answers to the questions below. Hence, I thought that people on this mailing list would be the most appropriate to comment on them. Can you please let me know your views? 1. Are all functions that are available in C API available in Java? 2. Are Java bindings added along with every enhancement to C API? 3. If answer to above question is negative, typically how long does it takes for the addition of Java bindings for the enhancement? 4. Most of libvirt based third party management applications use which of Java bindings or C API? 5. What are your good/bad experiences while using either of C API or Java bindings? 6. What is your concluding personal recommendation? And finally, since libvirt is a Redhat Emerging Technology project, does Redhat or any other third party service providers provide paid assistance, support? Thanks, Shashi

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Re: [libvirt-users] ESX support
by Aaron Lippold 09 Apr '10

09 Apr '10

Hi Matthias, Sorry for the late reply. I was on travel with limited network access last week. That sounds great, if you need any help or someone to test stuff, please let me know since I am highly interested in helping in any way I can. First question, when I am testing can I use VMWare Workstation on my laptop as a replacement for a full fledged for just testing API and libVirt access? If so I can set that up on my F12 box and start running some tests with libvirt and cobbler. Any new updates on the storage and network efforts? What are the basic requirements that you are going to try to initially hit. I assume there is alway more you could do but what's your 1.0 'good to go' set? Thanks, Aaron On Sun, Mar 21, 2010 at 1:26 PM, Matthias Bolte <matthias.bolte(a)googlemail.com> wrote: > You can manage the power state of a domain (start, stop, suspend, and > resume), you can also define a new domain, undefine existing domains, > migrate domains between hosts and configure CPU and RAM limits of a > domain. > > Two major missing features are currently storage and network > management. This means that you currently cannot use the libvirt > storage and network API to manage the storage and network of an ESX > server. I'm going to address this soon. > > A minor missing feature is editing the virtual hardware configuration > of an existing domain. I'm currently working on this. > > The problem reported by Jonathan Kelley affects ESX 4.0 only. It's not > fixed yet, but I think I can get it fixed for libvirt 0.7.8. I've > withdrawn the first patch fix this issue. A better patch is more > involved, because I need to rework the controller handling internally. > > Documentation about the ESX support can be found at: > http://www.libvirt.org/drvesx.html > > If you have any questions about the ESX support feel free to ask. > > Matthias > > 2010/3/19 Aaron Lippold <lippold(a)gmail.com>: >> Hi, >> >> So google and the mailing list didn't clearly state if we could or >> couldn't create a new vm in a domain on ESX or just turn it on, off, >> restart etc. >> >> Has the XML generation issue been addressed in 0.7.6+? If the docs >> exist, please point me to them and I will be glad to RT*M :). >> >> Thanks, >> >> A >> >> On Fri, Mar 12, 2010 at 4:21 PM, Matthias Bolte >> <matthias.bolte(a)googlemail.com> wrote: >>> 2010/3/9 Jonathan Kelley <jkelley(a)vm-labs.com>: >>>> Just curious but how long has ESX support been in libvirt? >>> >>> Since version 0.7.0 (August 2009). >>> >>>> Also I noticed this error when accessing one of my windows vms: >>>> >>>> error: internal error Expecting VMX entry 'scsi0.virtualDev' to be >>>> 'buslogic' or 'lsilogic' but found 'lsisas1068' >>> >>> I've just posted a patch to add lsisas1068 to the list of known SCSI >>> controller types. >>> >>> Thanks for reporting. >>> >>> Matthias >>> >> >

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[libvirt-users] libvirt, kvm, pxe boot failed
by Frank Matthieß 09 Apr '10

09 Apr '10

Hello all, on my debian squeeze system i have the problem as some others[1] using this combination of libvirt, kvm and qemu. "Cannot boot from non-existent NIC" is the qemu-kvm error message [1] http://www.google.com/search?q=libvirt+Cannot+boot+from+non-existent+NIC&ie… Linux swb20 2.6.30-2-686 #1 SMP Fri Dec 4 00:53:20 UTC 2009 i686 GNU/Linux ii kvm 1:0.12.3+dfsg-4 dummy transitional pacakge from kvm to qemu- ii libvirt-bin 0.7.7-1 the programs for the libvirt library ii libvirt-dev 0.7.7-1 development files for the libvirt library ii libvirt-doc 0.7.7-1 documentation for the libvirt library ii libvirt0 0.7.7-1 library for interfacing with different virtu ii linux-image-2.6.30-2-686 2.6.30-8squeeze1 Linux 2.6.30 image on PPro/Celeron/PII/PIII/ ii python-libvirt 0.7.7-1 libvirt Python bindings ii qemu-kvm 0.12.3+dfsg-4 Full virtualization on x86 hardware Is there any solution right now? Is a solution in preperation? Frank Matthieß. -- Frank Matthieß

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[libvirt-users] libvirt: C++ or Java
by Gokhale, Shashibhushan 09 Apr '10

09 Apr '10

Hello, I am planning to develop a management application for managing Redhat Xen and Redhat KVM hypervisors. I am evaluating the Java bindings versus the C++ version of libvirt. As part of evaluation, I could not find meaningful answers to the questions below. Hence, I thought that people on this mailing list would be the most appropriate to comment on them. Can you please let me know your views? 1. Are all functions that are available in C API available in Java? 2. Are Java bindings added along with every enhancement to C API? 3. If answer to above question is negative, typically how long does it takes for the addition of Java bindings for the enhancement? 4. Most of libvirt based third party management applications use which of Java bindings or C API? 5. What are your good/bad experiences while using either of C API or Java bindings? 6. What is your concluding personal recommendation? And finally, since libvirt is a Redhat Emerging Technology project, does Redhat or any other third party service providers provide paid assistance, support? Thanks, Shashi

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[libvirt-users] VIR_DOMAIN_DEVICE_MODIFY_CONFIG flag.
by Sharad Mishra 06 Apr '10

06 Apr '10

Hi, If a resource in a live VM is modified with the flag " VIR_DOMAIN_DEVICE_MODIFY_CONFIG". Is it same as - do not modify the resource now but change it at next boot? Thanks Sharad Mishra IBM

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[libvirt-users] libvirt on Debian - can I safely upgrade?
by Thomas Lutz 04 Apr '10

04 Apr '10

Hi there, I'm currently using libvirt 0.4.6 from the Debian sources with 6 VMs running and since I'm getting random crashes of one of the VMs without any logfile entry in either host or guest (libvirt debugging not turned on as I found out about it just today) I want to upgrade to the latest version (0.7.7 - I guess) from Debian backports. Is this huge upgrade safely possible with just switching sources to backports? Or can I expect problems? Rebooting the VMs is obligatory at the end of the upgrade? Thanks in advance and best regards, Thomas Lutz

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Re: [libvirt-users] question
by mattias 03 Apr '10

03 Apr '10

same error about a missed certificate but the text are in my native language swedish something like CA certificate On Sat, 2010-04-03 at 21:11 +0300, Danel Ahman wrote: > Try to use openvz:///system or openvz://localhost/system > > Danel > > On 03.04.2010, at 21:05, mattias wrote: > > > i try to connect to my local libvirt to use openvz > > openvz://localhost > > but i get an error about a missed certificate > > and when i use > > openvz:///localhost > > only a eror message says could not connect > > libvirt error > > > > _______________________________________________ > > libvirt-users mailing list > > libvirt-users(a)redhat.com > > https://www.redhat.com/mailman/listinfo/libvirt-users >

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