Re: [libvirt] How to start a defined domain
nope.
"vm01" can be seen after I started it using "xm create vm01". But, if I shut it down using "xm shutdown vm01", it can't be seen using "virsh list --all"
I assume that, "vm01" only have a xm config file stored in /etc/xen/, and libvirt or virsh need a XML style config file. So I can't start vm01 using "virsh start vm01" nor can I see it using "virsh list --all".
Is it like this? Do correct me if I'm wrong :-) so it becomes clear now, I guess you didn't 'define' the guest from
yes, and it works now, both "virsh start vm01" and my program. A lot of thanks to you. But there is still something disturbing. I'm using putty on windows xp connecting to another computer running CentOS which has xen and libvirt on it. After I type "virsh start vm01" or run my program, the terminal freezes, I can't input anything to terminal. And then the network connection to server is closed. Have you been into this? 2010-10-27 黄亮 发件人： Osier 发送时间： 2010-10-27 11:25:54 收件人： 黄亮 抄送： 主题： Re: [libvirt] How to start a defined domain ----- "黄亮" <lancerhuang@163.com> wrote: libvirt side, that means'vm01' is not a persistent domain, so after you shutdown the vm01 using xm, yes, libvirt can't see it anymore. actually even if after you use "virsh destroy" or "virsh shutdown", libvirt can't see it either.. :-) the way to define a domain to be persistent,(assume the domain is running) # virsh dumpxml vm01 > vm01.xml # virsh define vm01.xml then think you can start it via: # virsh start vm01 - Osier
2010-10-27
黄亮
发件人： Osier 发送时间： 2010-10-27 10:56:54 收件人： 黄亮 抄送： 主题： Re: [libvirt] How to start a defined domain
----- "黄亮" <lancerhuang@163.com> wrote:
Oh, yeah, you're right, it's "make uninstall" :-)
after uninstall 0.8.4 and reinstall 0.6.3, it still won't work.
but one thing I should mention is that while using "virsh start vm01", it reports the same error, saying can't find domain "vm01" with "xenUnifiedDomainLookupByName ". So I think maybe there is something I'm missing in define a domain.
Would you give me some hints so I can see where I go wrong? Really appreciated
ah, well, so let us check lower, can you see the guest "vm01" by "virsh list --all"?
- Osier
2010-10-27
黄亮
发件人： Osier 发送时间： 2010-10-26 22:29:40 收件人： 黄亮 抄送： libvir-list 主题： Re: [libvirt] How to start a defined domain
----- "黄亮" <lancerhuang@163.com> wrote:
Well, after "make clean", I run the compiled start.c, still won't work.
"make clean" won't uninstall the installed stuffs, use "make uninstall" instead, or you just made a typo? :-)
after that, suggest re-installing 0.6.3 if you are not sure if it's injured.
- Osier
And I forget to metion, an error msg is shown:
libvir: Xen error : Domain not found: xenUnifiedDomainLookupByName
is that means I missed something?
2010-10-26
黄亮
发件人： Osier 发送时间： 2010-10-26 18:05:46 收件人： 黄亮 抄送： 主题： Re: [libvirt] How to start a defined domain
----- "黄亮" <lancerhuang@163.com> wrote:
Accroding to your case, it seems I have no need to upgrade
libvirt
to
0.8.4 Will that work if I erase 0.8.4 using "make clean" and draw back to 0.6.3 ?
yep, think so, if you don't need the new features, and 0.6.3 is enough for your project requirement.. :-)
- Osier
2010-10-26
黄亮
发件人： Osier 发送时间： 2010-10-26 17:10:40 收件人： 黄亮 抄送： 主题： Re: [libvirt] How to start a defined domain
----- "黄亮" <lancerhuang@163.com> wrote:
Thanks for your reply, Osier.
The distro I'm using is CentOS release 5.5 (Final)
I'm not quite sure about the version of libvirt. At first, it
to
be 0.6.3, because /usr/lib64/libvirt.so.0 points to /usr/lib64/libvirt.so.0.6.3 Then I downloaded the src of libvirt_0.8.4 from offical website, and configure, make, make install. But now it show errors when I type "virsh". The error message
seems lies
below:
virsh: /usr/local/lib/libvirt.so.0: version `LIBVIRT_0.8.2' not found (required by virsh) virsh: /usr/local/lib/libvirt.so.0: version `LIBVIRT_0.7.1' not found (required by virsh) virsh: /usr/local/lib/libvirt.so.0: version `LIBVIRT_0.7.5' not found (required by virsh) virsh: /usr/local/lib/libvirt.so.0: version `LIBVIRT_0.8.1' not found (required by virsh) virsh: /usr/local/lib/libvirt.so.0: version `LIBVIRT_0.7.0' not found (required by virsh) virsh: /usr/local/lib/libvirt.so.0: version `LIBVIRT_0.7.2' not found (required by virsh) virsh: /usr/local/lib/libvirt.so.0: version `LIBVIRT_0.7.3' not found (required by virsh) virsh: /usr/local/lib/libvirt.so.0: version `LIBVIRT_0.8.0' not found (required by virsh) virsh: /usr/local/lib/libvirt.so.0: version `LIBVIRT_PRIVATE_0.8.4' not found (required by virsh) virsh: /usr/local/lib/libvirt.so.0: version `LIBVIRT_0.7.7' not found (required by virsh) virsh: /usr/local/lib/libvirt.so.0: version `LIBVIRT_0.6.4' not found (required by virsh)
probly you should try to erase the 0.6.3, then compile and install libvirt like:
# ./configure --prefix=/usr --libdir=/usr/lib64 # make # make install
your test program has no problem on my box. the libvirt on my box also is 0.6.3.
Regards
- Osier
As for xen, it is 3.3.2. The full "xm info" message is listed
below:
host : testbed01 release : 2.6.18-194.11.4.el5xen version : #1 SMP Tue Sep 21 05:40:24 EDT 2010 machine : x86_64 nr_cpus : 8 nr_nodes : 1 cores_per_socket : 4 threads_per_core : 2 cpu_mhz : 2793 hw_caps :
virt_caps : hvm total_memory : 4055 free_memory : 533 node_to_cpu : node0:0-7 node_to_memory : node0:533 xen_major : 3 xen_minor : 3 xen_extra : .2 xen_caps : xen-3.0-x86_64 xen-3.0-x86_32p hvm-3.0-x86_32 hvm-3.0-x86_32p hvm-3.0-x86_64 xen_scheduler : credit xen_pagesize : 4096 platform_params : virt_start=0xffff800000000000 xen_changeset : unavailable cc_compiler : gcc version 4.1.2 20080704 (Red Hat 4.1.2-44) cc_compile_by : root cc_compile_domain : gitco.tld cc_compile_date : Tue Aug 18 21:07:28 CEST 2009 xend_config_format : 4
I've write a simple c program to test the api, and it is
bfebfbff:28100800:00000000:00000140:0098e3fd:00000000:00000001:00000000 listed
below:
1 // This program aims to test the api which can start the VM 2 3 #include "stdio.h" 4 #include "stdlib.h" 5 #include "libvirt/libvirt.h" 6 7 int main(int argc ,char* argv[]) 8 { 9 virConnectPtr conn; 10 conn = virConnectOpen( "xen+tcp://localhost?no_Verify=1" ); 11 if( conn == NULL ) 12 { 13 printf( "Failed to Connect\n" ); 14 return 1; 15 } 16 const char* host = "vm01"; 17 virDomainPtr dom; 18 dom = virDomainLookupByName( conn, host ); 19 if( dom == NULL ) 20 { 21 printf( "can't find dom\n" ); 22 return 1; 23 } 24 // else 25 // { 26 // virDomainFree( dom ); 27 // virConnectClose( conn ); 28 // printf("done\n"); 29 // return 0; 30 // } 31 if( virDomainCreate( dom ) == -1 ) 32 { 33 printf( "failed to Start\n" ); 34 virDomainFree( dom ); 35 virConnectClose( conn ); 36 return 1; 37 } 38 else 39 { 40 printf( "Started\n" ); 41 virDomainFree( dom ); 42 virConnectClose( conn ); 43 return 0; 44 } 45 }
2010-10-26
Lancer
发件人： Osier 发送时间： 2010-10-26 11:35:31 收件人： 黄亮 抄送： libvir-list 主题： Re: [libvirt] How to start a defined domain
----- "黄亮" <lancerhuang@163.com> wrote:
I've create a domain called "vm01" using Virt-Manager, the
Now I wanna use libvirt api to control the life cycle of vm01. It went on well with shutdown and reboot, but how to start it became a problem.
I was intended to get the virDomainPtr by using virDomainLookupByName api, and then start it using virDomainCreate api. But it turns out that virDomainLookupByName api cannot return a virDomainPtr for a defined but not running domain.
no, it can :-)
If it really doesn't work for you, could you write a simple
GUI tool. program to
reproduce it? and try to explain what's the version of libvirt you use, on which distro, etc, any helpful info is welcomed. :-)
Thanks
- Osier
That's my situation, what do you suggest I do now? Thanks in advance.
2010-10-26
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