[libvirt-users] no connection driver available for No connection for URI xen:///

Fri Mar 16 15:35:56 UTC 2012

----- Original Message -----
From: "Su Zhang" <westlifezs at gmail.com>
To: "Alex Jia" <ajia at redhat.com>
Cc: libvirt-users at redhat.com, "Eric Blake" <eblake at redhat.com>
Sent: Friday, March 16, 2012 10:52:32 PM
Subject: Re: [libvirt-users] no connection driver available for No connection for URI xen:///

On Fri, Mar 16, 2012 at 2:22 AM, Alex Jia < ajia at redhat.com > wrote: 

On 03/16/2012 01:58 PM, Su Zhang wrote: 

On Fri, Mar 16, 2012 at 12:55 AM, Su Zhang < westlifezs at gmail.com > wrote: 

On Fri, Mar 16, 2012 at 12:16 AM, Alex Jia < ajia at redhat.com > wrote: 

On 03/16/2012 12:12 PM, Su Zhang wrote: 

Alex, 

I changed the symbolic link to "/usr/local/lib/libvirt.so.0.9.10". Here is the running script: 

[root at XenTester libvirt-0.9.10]# rm /usr/lib64/libvirt.so.0 
rm: remove symbolic link `/usr/lib64/libvirt.so.0'? yes 
[root at XenTester libvirt-0.9.10]# ln -s /usr/local/lib/libvirt.so.0.9.10 /usr/lib64/libvirt.so.0 
It's not enough, you had better to clean up your dirty libvirt environment, for example, remove all of 
libvirt rpm package on host, then recompile libvirt and ./configure --prefix=/usr && make && make install, or ./autogen --system && make && make install. 

I've already done make uninstall && ./autogen.sh --system && make && make install. However, while starting libvirtd, there is still an error here: 

Sorry I forgot the command line I used to start the libvirt service, here it is: 

[root at XenTester su]# /etc/rc.d/init.d/libvirtd start 

Starting libvirtd daemon: libvirtd: /usr/lib64/libvirt.so.0: version `LIBVIRT_PRIVATE_0.9.4' not found (required by libvirtd) 
libvirtd: /usr/lib64/libvirt.so.0: version `LIBVIRT_PRIVATE_0.9.4' not found (required by /usr/lib64/libvirt-qemu.so.0) 
[FAILED] 

Does it mean I cannot remove all of the libvirt binary by only running "make uninstall"? 
Are there any other ways can be used to remove the libvirt environment completely? 
As usual, 'make uninstall' should be okay, if your 0.9.4 is a libvirt rpm package installation, you may use 'rpm -e libvirt --nodeps' to 
remove it, also remove libvirt-client rpm package using the same method. 

Alex, 

I've done make uninstall, rpm -e libvirt --nodeps and rpm -e libvirt-client --nodeps before I rebuild ( ./autogen.sh --system && make && make install) the libvirt. 
It seems that the previous error has gone but warning is left: 

[root at XenTester su]# libvirtd start 
2012-03-16 14:37:04.511+0000: 29843: info : libvirt version: 0.9.10 
2012-03-16 14:37:04.511+0000: 29843: warning : virGetHostname:2108 : getaddrinfo failed for 'XenTester': Name or service not known

Su, the getaddrinfo() can get your hostname, it's just a warning not important, you can run 'hostname' and 'cat /etc/hosts' to
check whether 'XenTester' host name is okay.

Does this warning really matter? Are there anything returned by getaddrinfo will be used by guest OS? 

The getaddrinfo() is a gnulib API, which is used for translating name of a service location and/or a service name 
to set of socket addresses, libvirt just call it by internal virGetHostname API. it's a host operation not guest.

Besides, could you please confirm if the following running script suggest that Xen and libvirtd have been successfully connected? 

[root at XenTester libvirt-0.9.10]# virt-install -p 
ERROR 
--name is required 
--ram amount in MB is required 
--disk storage must be specified (override with --nodisks) 
An install method must be specified 
(--location URL, --cdrom CD/ISO, --pxe, --import, --boot hd|cdrom|...) 

Su, yeah, it works well for you, 'man virt-install' will show some example about how to install a guest, 
or you also interaction mode using virt-install with --prompt.

Thanks, 

Thanks, 

I run "strace -o strace.txt virt-install --connect=xen:/// -p" once again, and the following error came out: 

ERROR Error in network device parameters: Virtual network 'default' does not exist: this function is not supported by the connection driver: virNetworkLookupByName 
the strace.txt is attached. 
I think current xen URI works well for you, and you may try virt-install --connect=xen:/// -p -d or virt-install -p -d to confirm this. 

The above error is another issues, you need to change others stuff, it's not enough to just link 
/usr/local/lib/libvirt.so.0.9.10 /usr/lib64/libvirt.so.0, please follow answer 1. 

Are there any other places I need to change in order to let the system know I am running libvirt.so.0.9.10? 

Thanks, 

On Thu, Mar 15, 2012 at 10:54 PM, Su Zhang < westlifezs at gmail.com > wrote: 

Here it is: 

# ll /usr/lib64/libvirt.so.0 
lrwxrwxrwx. 1 root root 16 Mar 12 21:19 /usr/lib64/libvirt.so.0 -> libvirt.so.0.9.4 

So you meant that I used a wrong libvirt.so? How can I correct this? 

On Thu, Mar 15, 2012 at 10:52 PM, Alex Jia < ajia at redhat.com > wrote: 

On 03/16/2012 11:41 AM, Su Zhang wrote: 

On Thu, Mar 15, 2012 at 10:20 PM, Alex Jia < ajia at redhat.com > wrote: 

On 03/16/2012 11:02 AM, Su Zhang wrote: 

On Thu, Mar 15, 2012 at 9:45 PM, Alex Jia < ajia at redhat.com > wrote: 

On 03/16/2012 05:33 AM, Su Zhang wrote: 

On Thu, Mar 15, 2012 at 4:20 PM, Eric Blake < eblake at redhat.com > wrote: 

On 03/15/2012 02:57 PM, Su Zhang wrote: 
> Hi all, 
> 
> I am trying to use virt-install to install domU image. However, I 
> encountered the following issue. It seems that a connection driver is 
> needed for Xen. 
> I am new to both libvirt and Xen. Anyone have any ideas on what's wrong 
> with the following error ? 
> 
> 
> 
> # virt-install --connect=xen:/// -p -d 
> Thu, 15 Mar 2012 10:17:55 DEBUG Launched with command line: 
> /usr/bin/virt-install --connect=xen:/// -p -d 
> Thu, 15 Mar 2012 10:17:55 DEBUG Requesting libvirt URI xen:/// 
> Thu, 15 Mar 2012 10:17:55 ERROR no connection driver available for No 
> connection for URI xen:/// 

This probably means that your copy of libvirt.so and libvirtd was built 
without xen support. What does 

virsh --version=long 

say? Also, are you sure libvirtd is running? 
In addition, I want to know your libvirt.so, libvirtd, xend location, for example, 
# which libvirtd 
# which xend 
# locate libvirt.so 

Please also make sure xend service is running: 
# service xend status 

-- 
Eric Blake eblake at redhat.com +1-919-301-3266 
Libvirt virtualization library http://libvirt.org 

Eric, 

Here is the output: 
# virsh --version=long 
Virsh command line tool of libvirt 0.9.10 
See web site at http://libvirt.org/ 

Compiled with support for: 
Hypervisors: Xen QEmu/KVM UML OpenVZ VirtualBox LXC Test 
Networking: Remote Daemon Network Bridging Nwfilter VirtualPort 
Storage: Dir Filesystem SCSI Multipath iSCSI LVM 
Miscellaneous: SELinux Secrets Debug 

It seems that it does support Xen. 
Yeah, Xen indeed appears in Hypervisors line. 

I am not sure if libvirtd is running so I use the following command to start it: 

[root at XenTester srv]# /etc/rc.d/init.d/libvirtd start 
Right, you may also use service libvirtd start, and check it by service libvirtd status or ps -ef|grep libvirtd. 

But the same error is still there. 

Am I using the right way to start libvirtd service? Are there any other possible reasons of this error? 

Thanks, 

-- 
Su Zhang 
Ph.D Candidate 
Computing and Information Sciences 
Kansas State University 
_______________________________________________
libvirt-users mailing list libvirt-users at redhat.com https://www.redhat.com/mailman/listinfo/libvirt-users 
Alex, 

Here is some information: 

# /etc/init.d/xencommons start 
Starting xenstored... 
Setting domain 0 name... 
Starting xenconsoled... 
[root at XenTester su]# /etc/init.d/xend start 
[root at XenTester su]# which libvirtd 
/usr/local/sbin/libvirtd 
[root at XenTester su]# which xend 
/usr/sbin/xend 
[root at XenTester su]# locate libvirt.so 
/usr/lib64/libvirt.so.0 
/usr/lib64/libvirt.so.0.9.4 
/usr/local/lib/libvirt.so 
/usr/local/lib/libvirt.so.0 
/usr/local/lib/libvirt.so.0.9.10 
You have 2 different libvirt versions 0.9.4 and 0.9.10, and your 0.9.10 is put under the 
/usr/local/lib directory, so I guess you haven't used ./configure with --prefix=/usr option 
or directly use ./autogen.sh --system when you configure and compile libvirt. 

And also please yum install strace -y if you haven't installed strace rpm, then run the following operation: 

# strace -o strace.txt virt-install --connect=xen:/// -p 

Then attach strace.txt as a attachment. 

Thanks, 
Alex 

Alex, 

Thanks. I have run ./autogen.sh --system. And "make" and "make install" the libvirt once again. 
I encountered one type of errors while running "make install", it seems that the installer is looking for a bunch of HTML files under /usr/bin/install. here is the error info: 

/usr/bin/install: cannot stat `./api.html': No such file or directory 
/usr/bin/install: cannot stat `./api_extension.html': No such file or directory 
/usr/bin/install: cannot stat `./apps.html': No such file or directory 
/usr/bin/install: cannot stat `./archdomain.html': No such file or directory 
/usr/bin/install: cannot stat `./architecture.html': No such file or directory 
/usr/bin/install: cannot stat `./archnetwork.html': No such file or directory 
/usr/bin/install: cannot stat `./archnode.html': No such file or directory 
(there are still tens of HTML files missing) 
.... 
It's not important for our issues. 

Do you think this type of errors will affect the functionality of libvirt? 
Also, I checked and it seems that I've the latest strace package installed. So I run "strace -o strace.txt virt-install --connect=xen:/// -p". 
Please find strace.txt attached. 
I saw virt-install is opening /usr/lib64/libvirt.so.0 in strace.txt: open("/usr/lib64/libvirt.so.0", O_RDONLY) = 7 I want to confirm whether you're using compiling libvirt 0.9.10, 
ll /usr/lib64/libvirt.so.0 say what? 

Thanks, 
Alex 

Thanks, 

[root at XenTester su]# service xend status 
[root at XenTester su]# ps -ef|grep libvirtd 
root 2242 1 0 21:52 ? 00:00:00 libvirtd --daemon 
root 3295 3112 0 21:59 pts/0 00:00:00 grep libvirtd 

Can you see if it is normal here? 

Thanks, 

-- 
Su Zhang 
Ph.D Candidate 
Computing and Information Sciences 
Kansas State University 

-- 
Su Zhang 
Ph.D Candidate 
Computing and Information Sciences 
Kansas State University 

-- 
Su Zhang 
Ph.D Candidate 
Computing and Information Sciences 
Kansas State University 

-- 
Su Zhang 
Ph.D Candidate 
Computing and Information Sciences 
Kansas State University 

-- 
Su Zhang 
Ph.D Candidate 
Computing and Information Sciences 
Kansas State University 

-- 
Su Zhang 
Ph.D Candidate 
Computing and Information Sciences 
Kansas State University 

-- 
Su Zhang 
Ph.D Candidate 
Computing and Information Sciences 
Kansas State University 