12:10 p.m.
Hello Experts,
I need a help from you . I am using CentOS 6.4 and using guestfish to
modify an ESX image.
I am adding a disk, executing "run" command and mounting it. the
"run"
command is taking around 50 seconds . Is there any way to minimize it. If
we can not minimize it then Can we create and keep the guestfish virtual
shell open so that we can just add a disk , mount and modify the image in
few seconds.
Need your expert advice. Many Thanks in advance.
Thanks & Best Regards,
Priyanka.
12:53 p.m.
On Fri, Sep 12, 2014 at 10:40:14PM +0530, Priyanka Ranjan wrote:
Hello Experts,
I need a help from you . I am using CentOS 6.4 and using guestfish
to modify an ESX image.
I am adding a disk, executing "run" command and mounting it. the
"run" command is taking around 50 seconds . Is there any way to
minimize it.
So first of all, measure the performance. Run the simple
baseline tests here:
http://libguestfs.org/guestfs-performance.1.html#baseline-measurements
If, after several runs, this stays at ~ 50 seconds, then it's likely
because you are running this inside a virtual machine, on Amazon EC2,
or on a machine which has virtualization disabled (eg in the BIOS
settings). You can fix that by using baremetal (or maybe nested virt).
You will find other tips in the guestfs-performance(1) man page that I
linked to above.
If we can not minimize it then Can we create and keep the guestfish
virtual shell open so that we can just add a disk , mount and modify
the image in few seconds.
Yes, but unfortunately not on CentOS 6. On RHEL / CentOS 7 we support
hotplugging in both libguestfs and guestfish, and that lets you do
exactly what you describe above.
http://libguestfs.org/guestfs.3.html#hotplugging
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
9:17 a.m.
Thanks a lot Rechard for your inputs.
On Fri, Sep 12, 2014 at 11:23 PM, Richard W.M. Jones <rjones(a)redhat.com>
wrote:
On Fri, Sep 12, 2014 at 10:40:14PM +0530, Priyanka Ranjan wrote:
> Hello Experts,
>
> I need a help from you . I am using CentOS 6.4 and using guestfish
> to modify an ESX image.
>
> I am adding a disk, executing "run" command and mounting it. the
> "run" command is taking around 50 seconds . Is there any way to
> minimize it.
So first of all, measure the performance. Run the simple
baseline tests here:
http://libguestfs.org/guestfs-performance.1.html#baseline-measurements
If, after several runs, this stays at ~ 50 seconds, then it's likely
because you are running this inside a virtual machine, on Amazon EC2,
or on a machine which has virtualization disabled (eg in the BIOS
settings). You can fix that by using baremetal (or maybe nested virt).
You will find other tips in the guestfs-performance(1) man page that I
linked to above.
> If we can not minimize it then Can we create and keep the guestfish
> virtual shell open so that we can just add a disk , mount and modify
> the image in few seconds.
Yes, but unfortunately not on CentOS 6. On RHEL / CentOS 7 we support
hotplugging in both libguestfs and guestfish, and that lets you do
exactly what you describe above.
http://libguestfs.org/guestfs.3.html#hotplugging
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
9:29 a.m.
Hello Richard,
I thought to move to CentOS 6.5 and capture the performance data to start
with. unfortunately I cant move to CentOS 7. But now I am facing very
strange issue the "libguestfs launch" is failing. I tried to debug but
could not fix this issue. I am attaching all logs below. I am just trying
to execute a command "time guestfish -a /dev/null run" mentioned in the
performance page. I found that " sudo yum install libguestfs-tools"
installed "libguestfs-tools-1.20.x" on CentOS 6.5. I have captured output
of all the commands which I have executed. Am I missing something here?
Thanks a lot for all your help in advance,
[root@PriyankaVM ~]# cat /etc/*issue*
CentOS release 6.5 (Final)
Kernel \r on an \m
[root@PriyankaVM ~]# sudo yum install libguestfs-tools
[root@PriyankaVM ~]# rpm -qa|grep guest
libguestfs-tools-1.20.11-2.el6.x86_64
libguestfs-tools-c-1.20.11-2.el6.x86_64
vmware-tools-plugins-guestInfo-9.4.0-1.el6.x86_64
libguestfs-1.20.11-2.el6.x86_64
vmware-tools-guestlib-9.4.0-1.el6.x86_64
[root@PriyankaVM ~]# time guestfish -a /dev/null run
libguestfs: error: /usr/libexec/qemu-kvm exited with error status 1.
To see full error messages you may need to enable debugging.
See http://libguestfs.org/guestfs-faq.1.html#debugging-libguestfs
real 0m26.704s
user 0m10.964s
sys 0m6.028s
[root@PriyankaVM ~]# export LIBGUESTFS_DEBUG=1
[root@PriyankaVM ~]# export LIBGUESTFS_TRACE=1
[root@PriyankaVM ~]# libguestfs-test-tool
************************************************************
* IMPORTANT NOTICE
*
* When reporting bugs, include the COMPLETE, UNEDITED
* output below in your bug report.
*
************************************************************
libguestfs: trace: set_verbose true
libguestfs: trace: set_verbose = 0
libguestfs: trace: set_verbose true
libguestfs: trace: set_verbose = 0
LIBGUESTFS_DEBUG=1
LIBGUESTFS_TRACE=1
PATH=/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin:/root/bin
SELinux: Enforcing
libguestfs: trace: add_drive "/tmp/libguestfs-test-tool-sda-k3It4V"
"format:raw"
libguestfs: trace: add_drive = 0
libguestfs: trace: version
libguestfs: trace: version = <struct guestfs_version *>
library version: 1.20.11rhel=6,release=2.el6
libguestfs: trace: get_append
libguestfs: trace: get_append = "NULL"
guestfs_get_append: (null)
libguestfs: trace: get_attach_method
libguestfs: trace: get_attach_method = "appliance"
guestfs_get_attach_method: appliance
libguestfs: trace: get_autosync
libguestfs: trace: get_autosync = 1
guestfs_get_autosync: 1
libguestfs: trace: get_cachedir
libguestfs: trace: get_cachedir = "/var/tmp"
guestfs_get_cachedir: /var/tmp
libguestfs: trace: get_direct
libguestfs: trace: get_direct = 0
guestfs_get_direct: 0
libguestfs: trace: get_memsize
libguestfs: trace: get_memsize = 500
guestfs_get_memsize: 500
libguestfs: trace: get_network
libguestfs: trace: get_network = 0
guestfs_get_network: 0
libguestfs: trace: get_path
libguestfs: trace: get_path = "/usr/lib64/guestfs"
guestfs_get_path: /usr/lib64/guestfs
libguestfs: trace: get_pgroup
libguestfs: trace: get_pgroup = 0
guestfs_get_pgroup: 0
libguestfs: trace: get_qemu
libguestfs: trace: get_qemu = "/usr/libexec/qemu-kvm"
guestfs_get_qemu: /usr/libexec/qemu-kvm
libguestfs: trace: get_recovery_proc
libguestfs: trace: get_recovery_proc = 1
guestfs_get_recovery_proc: 1
libguestfs: trace: get_selinux
libguestfs: trace: get_selinux = 0
guestfs_get_selinux: 0
libguestfs: trace: get_smp
libguestfs: trace: get_smp = 1
guestfs_get_smp: 1
libguestfs: trace: get_tmpdir
libguestfs: trace: get_tmpdir = "/tmp"
guestfs_get_tmpdir: /tmp
libguestfs: trace: get_trace
libguestfs: trace: get_trace = 1
guestfs_get_trace: 1
libguestfs: trace: get_verbose
libguestfs: trace: get_verbose = 1
guestfs_get_verbose: 1
host_cpu: x86_64
Launching appliance, timeout set to 600 seconds.
libguestfs: trace: launch
libguestfs: trace: get_tmpdir
libguestfs: trace: get_tmpdir = "/tmp"
libguestfs: launch: attach-method=appliance
libguestfs: launch: tmpdir=/tmp/libguestfsUpuW0B
libguestfs: launch: umask=0022
libguestfs: launch: euid=0
libguestfs: command: run: febootstrap-supermin-helper
libguestfs: command: run: \ --verbose
libguestfs: command: run: \ -f checksum
libguestfs: command: run: \ /usr/lib64/guestfs/supermin.d
libguestfs: command: run: \ x86_64
supermin helper [00000ms] whitelist = (not specified), host_cpu = x86_64,
kernel = (null), initrd = (null), appliance = (null)
supermin helper [00000ms] inputs[0] = /usr/lib64/guestfs/supermin.d
checking modpath /lib/modules/2.6.32-431.11.2.el6.x86_64 is a directory
picked vmlinuz-2.6.32-431.11.2.el6.x86_64 because modpath
/lib/modules/2.6.32-431.11.2.el6.x86_64 exists
supermin helper [00002ms] finished creating kernel
supermin helper [00002ms] visiting /usr/lib64/guestfs/supermin.d
supermin helper [00003ms] visiting /usr/lib64/guestfs/supermin.d/base.img
supermin helper [00003ms] visiting /usr/lib64/guestfs/supermin.d/daemon.img
supermin helper [00003ms] visiting /usr/lib64/guestfs/supermin.d/hostfiles
supermin helper [00111ms] visiting /usr/lib64/guestfs/supermin.d/init.img
supermin helper [00113ms] visiting
/usr/lib64/guestfs/supermin.d/udev-rules.img
supermin helper [00113ms] adding kernel modules
supermin helper [00278ms] finished creating appliance
libguestfs: checksum of existing appliance:
b81afcfba02c9dc60949034595a88ebf29731923a9ef273af22835a3f4798d2e
libguestfs: trace: get_cachedir
libguestfs: trace: get_cachedir = "/var/tmp"
libguestfs: [00293ms] begin testing qemu features
libguestfs: command: run: /usr/libexec/qemu-kvm
libguestfs: command: run: \ -nographic
libguestfs: command: run: \ -help
libguestfs: command: run: /usr/libexec/qemu-kvm
libguestfs: command: run: \ -nographic
libguestfs: command: run: \ -version
libguestfs: qemu version 0.12
libguestfs: command: run: /usr/libexec/qemu-kvm
libguestfs: command: run: \ -nographic
libguestfs: command: run: \ -machine accel=kvm:tcg
libguestfs: command: run: \ -device ?
libguestfs: error: /usr/libexec/qemu-kvm exited with error status 1, see
debug messages above
libguestfs: trace: launch = -1 (error)
libguestfs-test-tool: failed to launch appliance
libguestfs: trace: close
libguestfs: closing guestfs handle 0x1eacd70 (state 0)
libguestfs: command: run: rm
libguestfs: command: run: \ -rf /tmp/libguestfsUpuW0B
[root@PriyankaVM ~]# time guestfish -a /dev/null run
libguestfs: trace: set_verbose true
libguestfs: trace: set_verbose = 0
libguestfs: create: flags = 0, handle = 0x221f2b0
libguestfs: trace: set_pgroup true
libguestfs: trace: set_pgroup = 0
libguestfs: trace: add_drive "/dev/null"
libguestfs: trace: get_tmpdir
libguestfs: trace: get_tmpdir = "/tmp"
libguestfs: trace: add_drive = 0
libguestfs: trace: launch
libguestfs: launch: attach-method=appliance
libguestfs: launch: tmpdir=/tmp/libguestfsANZENV
libguestfs: launch: umask=0022
libguestfs: launch: euid=0
libguestfs: command: run: febootstrap-supermin-helper
libguestfs: command: run: \ --verbose
libguestfs: command: run: \ -f checksum
libguestfs: command: run: \ /usr/lib64/guestfs/supermin.d
libguestfs: command: run: \ x86_64
supermin helper [00000ms] whitelist = (not specified), host_cpu = x86_64,
kernel = (null), initrd = (null), appliance = (null)
supermin helper [00000ms] inputs[0] = /usr/lib64/guestfs/supermin.d
checking modpath /lib/modules/2.6.32-431.11.2.el6.x86_64 is a directory
picked vmlinuz-2.6.32-431.11.2.el6.x86_64 because modpath
/lib/modules/2.6.32-431.11.2.el6.x86_64 exists
supermin helper [00002ms] finished creating kernel
supermin helper [00002ms] visiting /usr/lib64/guestfs/supermin.d
supermin helper [00002ms] visiting /usr/lib64/guestfs/supermin.d/base.img
supermin helper [00002ms] visiting /usr/lib64/guestfs/supermin.d/daemon.img
supermin helper [00002ms] visiting /usr/lib64/guestfs/supermin.d/hostfiles
supermin helper [00107ms] visiting /usr/lib64/guestfs/supermin.d/init.img
supermin helper [00114ms] visiting
/usr/lib64/guestfs/supermin.d/udev-rules.img
supermin helper [00114ms] adding kernel modules
supermin helper [00192ms] finished creating appliance
libguestfs: checksum of existing appliance:
b81afcfba02c9dc60949034595a88ebf29731923a9ef273af22835a3f4798d2e
libguestfs: trace: get_cachedir
libguestfs: trace: get_cachedir = "/var/tmp"
libguestfs: [00198ms] begin testing qemu features
libguestfs: command: run: /usr/libexec/qemu-kvm
libguestfs: command: run: \ -nographic
libguestfs: command: run: \ -help
libguestfs: command: run: /usr/libexec/qemu-kvm
libguestfs: command: run: \ -nographic
libguestfs: command: run: \ -version
libguestfs: qemu version 0.12
libguestfs: command: run: /usr/libexec/qemu-kvm
libguestfs: command: run: \ -nographic
libguestfs: command: run: \ -machine accel=kvm:tcg
libguestfs: command: run: \ -device ?
libguestfs: error: /usr/libexec/qemu-kvm exited with error status 1, see
debug messages above
libguestfs: trace: launch = -1 (error)
libguestfs: trace: close
libguestfs: closing guestfs handle 0x221f2b0 (state 0)
libguestfs: command: run: rm
libguestfs: command: run: \ -rf /tmp/libguestfsANZENV
real 0m0.341s
user 0m0.086s
sys 0m0.222s
On Sat, Sep 13, 2014 at 7:47 PM, Priyanka Ranjan <priyanka3rdfeb(a)gmail.com>
wrote:
Thanks a lot Rechard for your inputs.
On Fri, Sep 12, 2014 at 11:23 PM, Richard W.M. Jones <rjones(a)redhat.com>
wrote:
> On Fri, Sep 12, 2014 at 10:40:14PM +0530, Priyanka Ranjan wrote:
> > Hello Experts,
> >
> > I need a help from you . I am using CentOS 6.4 and using guestfish
> > to modify an ESX image.
> >
> > I am adding a disk, executing "run" command and mounting it. the
> > "run" command is taking around 50 seconds . Is there any way to
> > minimize it.
>
> So first of all, measure the performance. Run the simple
> baseline tests here:
>
> http://libguestfs.org/guestfs-performance.1.html#baseline-measurements
>
> If, after several runs, this stays at ~ 50 seconds, then it's likely
> because you are running this inside a virtual machine, on Amazon EC2,
> or on a machine which has virtualization disabled (eg in the BIOS
> settings). You can fix that by using baremetal (or maybe nested virt).
>
> You will find other tips in the guestfs-performance(1) man page that I
> linked to above.
>
> > If we can not minimize it then Can we create and keep the guestfish
> > virtual shell open so that we can just add a disk , mount and modify
> > the image in few seconds.
>
> Yes, but unfortunately not on CentOS 6. On RHEL / CentOS 7 we support
> hotplugging in both libguestfs and guestfish, and that lets you do
> exactly what you describe above.
>
> http://libguestfs.org/guestfs.3.html#hotplugging
>
> 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
>
9:44 a.m.
On Wed, Sep 17, 2014 at 07:59:03PM +0530, Priyanka Ranjan wrote:
libguestfs: command: run: /usr/libexec/qemu-kvm
libguestfs: command: run: \ -nographic
libguestfs: command: run: \ -machine accel=kvm:tcg
libguestfs: command: run: \ -device ?
libguestfs: error: /usr/libexec/qemu-kvm exited with error status 1, see
debug messages above
libguestfs: trace: launch = -1 (error)
It looks as if qemu is broken on your machine. What's the output of:
/usr/libexec/qemu-kvm -nographic -machine accel=kvm:tcg -device \?
Note that you don't need to run libguestfs tools as root.
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
10:22 a.m.
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.
Thanks again for your help.
On Wed, Sep 17, 2014 at 8:14 PM, Richard W.M. Jones <rjones(a)redhat.com>
wrote:
On Wed, Sep 17, 2014 at 07:59:03PM +0530, Priyanka Ranjan wrote:
> libguestfs: command: run: /usr/libexec/qemu-kvm
> libguestfs: command: run: \ -nographic
> libguestfs: command: run: \ -machine accel=kvm:tcg
> libguestfs: command: run: \ -device ?
> libguestfs: error: /usr/libexec/qemu-kvm exited with error status 1, see
> debug messages above
> libguestfs: trace: launch = -1 (error)
It looks as if qemu is broken on your machine. What's the output of:
/usr/libexec/qemu-kvm -nographic -machine accel=kvm:tcg -device \?
Note that you don't need to run libguestfs tools as root.
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
10:27 a.m.
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
7:21 p.m.
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(a)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
8:23 p.m.
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(a)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(a)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
>
2:44 a.m.
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
2:54 a.m.
ok , Thanks Richard.
On Thu, Sep 18, 2014 at 1:14 PM, Richard W.M. Jones <rjones(a)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
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Richard W.M. Jones