Hello Richard, One more question, you mentioned that "hot plugging" is supported from *CentOS 7 *and gave me a link. That link says "In libguestfs ≥ 1.20, you may add drives and remove after calling "guestfs_launch" <http://libguestfs.org/guestfs.3.html#guestfs_launch>. There are some restrictions, see below. This is called*hotplugging*." When I executed "sudo yum install libguestfs-tools" on CentOS 6.5, it installed libguestfs 1.20.11. So if we fix the current qemu issue then can we use "hotplugging" in CentOS 6.5? Do you see some other issues? Do you recommend CentOS 7 only for the "hotplugging"? Many Thanks for all your help. On Thu, Sep 18, 2014 at 5:51 AM, Priyanka Ranjan <priyanka3rdfeb@gmail.com> wrote:> Thanks Richard, > I have asked CentOS and qemu mailing list about this issue and waiting for > their reply. > > It is really strange that on CentOS 6.4 VM, atleast qemu was wokring but > in higher version "6.5" it is not working. > > > > > > On Wed, Sep 17, 2014 at 8:57 PM, Richard W.M. Jones <rjones@redhat.com> > wrote: > >> On Wed, Sep 17, 2014 at 08:52:57PM +0530, Priyanka Ranjan wrote: >> > Many Thanks Richard for your reply. >> > >> > # /usr/libexec/qemu-kvm -nographic -machine accel=kvm:tcg -device \? >> > >> > open /dev/kvm: No such file or directory >> > failed to initialize KVM: Operation not permitted >> > Back to tcg accelerator. >> > Could not allocate dynamic translator buffer >> > >> > I tried executing "setsebool -P virt_use_execmem=on" also after looking >> at >> > "http://libguestfs.org/guestfs-faq.1.html" but that also did not >> help. >> > Please guide me how to fix this issue and proceed further. >> >> That command is the way you're supposed to fix this problem. If it >> doesn't work then I don't know -- perhaps ask on a CentOS or qemu list, >> or open a bug against CentOS? >> >> Rich. >> >> -- >> Richard Jones, Virtualization Group, Red Hat >> http://people.redhat.com/~rjones >> Read my programming and virtualization blog: http://rwmj.wordpress.com >> Fedora Windows cross-compiler. Compile Windows programs, test, and >> build Windows installers. Over 100 libraries supported. >> http://fedoraproject.org/wiki/MinGW >> > >
On Thu, Sep 18, 2014 at 06:53:09AM +0530, Priyanka Ranjan wrote:> Hello Richard, > One more question, you mentioned that "hot plugging" is supported from *CentOS > 7 *and gave me a link. That link says > > "In libguestfs ≥ 1.20, you may add drives and remove after calling > "guestfs_launch" <http://libguestfs.org/guestfs.3.html#guestfs_launch>. > There are some restrictions, see below. This is called*hotplugging*." > > When I executed "sudo yum install libguestfs-tools" on CentOS 6.5, it > installed libguestfs 1.20.11. So if we fix the current qemu issue then can > we use "hotplugging" in CentOS 6.5? Do you see some other issues? Do you > recommend CentOS 7 only for the "hotplugging"?Hotplugging requires libvirt, and that only works in CentOS >= 7. Rich. -- Richard Jones, Virtualization Group, Red Hat http://people.redhat.com/~rjones Read my programming and virtualization blog: http://rwmj.wordpress.com libguestfs lets you edit virtual machines. Supports shell scripting, bindings from many languages. http://libguestfs.org
ok , Thanks Richard. On Thu, Sep 18, 2014 at 1:14 PM, Richard W.M. Jones <rjones@redhat.com> wrote:> On Thu, Sep 18, 2014 at 06:53:09AM +0530, Priyanka Ranjan wrote: > > Hello Richard, > > One more question, you mentioned that "hot plugging" is supported from > *CentOS > > 7 *and gave me a link. That link says > > > > "In libguestfs ≥ 1.20, you may add drives and remove after calling > > "guestfs_launch" <http://libguestfs.org/guestfs.3.html#guestfs_launch>. > > There are some restrictions, see below. This is called*hotplugging*." > > > > When I executed "sudo yum install libguestfs-tools" on CentOS 6.5, it > > installed libguestfs 1.20.11. So if we fix the current qemu issue then > can > > we use "hotplugging" in CentOS 6.5? Do you see some other issues? Do you > > recommend CentOS 7 only for the "hotplugging"? > > Hotplugging requires libvirt, and that only works in CentOS >= 7. > > Rich. > > -- > Richard Jones, Virtualization Group, Red Hat > http://people.redhat.com/~rjones > Read my programming and virtualization blog: http://rwmj.wordpress.com > libguestfs lets you edit virtual machines. Supports shell scripting, > bindings from many languages. http://libguestfs.org >