libvirt users - Nov 2015 - Re: How could I do the guest mount operation from the host?

Hi,
       I have tried usb and it doesn’t work. I don’t know if the filesystem tag
could work…
I find in the formatdomain docs about the filesystem:

<filesystem type='mount' accessmode='passthrough'>
      <driver type='path' wrpolicy='immediate'/>
      <source dir='/export/to/guest'/>
      <target dir='/import/from/host'/>
      <readonly/>
</filesystem>

The description of filesystem is: A directory on the host that can be accessed
directly from the guest.
I don’t know what the format should be and make the the disk image
/kvmdata/disk/dk389_581.img in the host
mount to the guest /mnt directory.

Best Regards

From Jiaping LI

发件人: Dominique Ramaekers [mailto:dominique.ramaekers@cometal.be]
发送时间: 2015年11月6日 20:54
收件人: 李笳平; 'libvirt-users@redhat.com'
主题: RE: [libvirt-users] How could I do the guest mount operation from the host?

You can attach the disk on the usb bus (<target dev='sda'
bus='sub'/> - Not 100% sure about this but probably in the right
direction) and let the guest automount usb-storage…



Van: 李笳平
[mailto:lijiaping@yovole.com]<mailto:[mailto:lijiaping@yovole.com]>
Verzonden: vrijdag 6 november 2015 10:14
Aan: Dominique Ramaekers; 'libvirt-users@redhat.com'
Onderwerp: 答复: [libvirt-users] How could I do the guest mount operation from the
host?

Hi,
       Thanks for your response!
But when I use the ssh, I need to know the guest password, and actually it
belongs to network communication. I don’t know if the libvirt has some means
just
like to control the domain to implement the operation?


Best Regards

From Jiaping LI

发件人: Dominique Ramaekers [mailto:dominique.ramaekers@cometal.be]
发送时间: 2015年11月6日 15:41
收件人: 李笳平; libvirt-users@redhat.com<mailto:libvirt-users@redhat.com>
主题: RE: [libvirt-users] How could I do the guest mount operation from the host?

Why not ssh?

Van:
libvirt-users-bounces@redhat.com<mailto:libvirt-users-bounces@redhat.com>
[mailto:libvirt-users-bounces@redhat.com]<mailto:[mailto:libvirt-users-bounces@redhat.com]>
Namens ???
Verzonden: vrijdag 6 november 2015 3:34
Aan: libvirt-users@redhat.com<mailto:libvirt-users@redhat.com>
Onderwerp: [libvirt-users] How could I do the guest mount operation from the
host?

Hi all,
       When I attach a disk like this:
<disk type='file' device='disk'>
        <driver name='qemu' type='qcow2'
cache='none'/>
        <source file='/kvmdata/disk/dk389_581.img'/>
        <backingStore/>
        <target dev='vda' bus='virtio'/>
        <alias name='virtio-disk0'/>
        <address type='pci' domain='0x0000'
bus='0x00' slot='0x07' function='0x0'/>
</disk>
And then I use “fdisk -l” on the guest, can find the disk info, if I want to
mount a disk, I should log on the guest and use the command just like:
mount /dev/vda1 /mnt
       Does Libvirt has some API which can send the guest operation(like
mount/umount) from host to guest?
Thus I can do the operation on host and need not to log on guest to do the
operation.
       Thanks!


Best Regards

From Jiaping LI


保密：本函仅供收件人使用，如阁下并非抬头标明的收件人，请您即刻删除本函，勿以任何方式使用及传播，并请您能将此误发情形通知发件人，谢谢！

保密：本函仅供收件人使用，如阁下并非抬头标明的收件人，请您即刻删除本函，勿以任何方式使用及传播，并请您能将此误发情形通知发件人，谢谢！

保密：本函仅供收件人使用，如阁下并非抬头标明的收件人，请您即刻删除本函，勿以任何方式使用及传播，并请您能将此误发情形通知发件人，谢谢！

For usb I meant something like:
<disk type='file' device='disk'>
        <driver name='qemu' type='qcow2'
cache='none'/>
        <source file='/kvmdata/disk/dk389_581.img'/>
        <target dev='sda' bus='usb'/>
</disk>

If you want to use fiesystem passtrough, I think you have to look at p9
filesystem. I’ve used it before and it worked like a charm. This does require
some setup in the guest…


Van: 李笳平 [mailto:lijiaping@yovole.com]
Verzonden: maandag 9 november 2015 7:14
Aan: Dominique Ramaekers; 'libvirt-users@redhat.com'
Onderwerp: 答复: [libvirt-users] How could I do the guest mount operation from the
host?

Hi,
       I have tried usb and it doesn’t work. I don’t know if the filesystem tag
could work…
I find in the formatdomain docs about the filesystem:

<filesystem type='mount' accessmode='passthrough'>
      <driver type='path' wrpolicy='immediate'/>
      <source dir='/export/to/guest'/>
      <target dir='/import/from/host'/>
      <readonly/>
</filesystem>

The description of filesystem is: A directory on the host that can be accessed
directly from the guest.
I don’t know what the format should be and make the the disk image
/kvmdata/disk/dk389_581.img in the host
mount to the guest /mnt directory.

Best Regards

From Jiaping LI

发件人: Dominique Ramaekers [mailto:dominique.ramaekers@cometal.be]
发送时间: 2015年11月6日 20:54
收件人: 李笳平; 'libvirt-users@redhat.com'
主题: RE: [libvirt-users] How could I do the guest mount operation from the host?

You can attach the disk on the usb bus (<target dev='sda'
bus='sub'/> - Not 100% sure about this but probably in the right
direction) and let the guest automount usb-storage…



Van: 李笳平
[mailto:lijiaping@yovole.com]<mailto:[mailto:lijiaping@yovole.com]>
Verzonden: vrijdag 6 november 2015 10:14
Aan: Dominique Ramaekers; 'libvirt-users@redhat.com'
Onderwerp: 答复: [libvirt-users] How could I do the guest mount operation from the
host?

Hi,
       Thanks for your response!
But when I use the ssh, I need to know the guest password, and actually it
belongs to network communication. I don’t know if the libvirt has some means
just
like to control the domain to implement the operation?


Best Regards

From Jiaping LI

发件人: Dominique Ramaekers [mailto:dominique.ramaekers@cometal.be]
发送时间: 2015年11月6日 15:41
收件人: 李笳平; libvirt-users@redhat.com<mailto:libvirt-users@redhat.com>
主题: RE: [libvirt-users] How could I do the guest mount operation from the host?

Why not ssh?

Van:
libvirt-users-bounces@redhat.com<mailto:libvirt-users-bounces@redhat.com>
[mailto:libvirt-users-bounces@redhat.com]<mailto:[mailto:libvirt-users-bounces@redhat.com]>
Namens ???
Verzonden: vrijdag 6 november 2015 3:34
Aan: libvirt-users@redhat.com<mailto:libvirt-users@redhat.com>
Onderwerp: [libvirt-users] How could I do the guest mount operation from the
host?

Hi all,
       When I attach a disk like this:
<disk type='file' device='disk'>
        <driver name='qemu' type='qcow2'
cache='none'/>
        <source file='/kvmdata/disk/dk389_581.img'/>
        <backingStore/>
        <target dev='vda' bus='virtio'/>
        <alias name='virtio-disk0'/>
        <address type='pci' domain='0x0000'
bus='0x00' slot='0x07' function='0x0'/>
</disk>
And then I use “fdisk -l” on the guest, can find the disk info, if I want to
mount a disk, I should log on the guest and use the command just like:
mount /dev/vda1 /mnt
       Does Libvirt has some API which can send the guest operation(like
mount/umount) from host to guest?
Thus I can do the operation on host and need not to log on guest to do the
operation.
       Thanks!


Best Regards

From Jiaping LI


保密：本函仅供收件人使用，如阁下并非抬头标明的收件人，请您即刻删除本函，勿以任何方式使用及传播，并请您能将此误发情形通知发件人，谢谢！

保密：本函仅供收件人使用，如阁下并非抬头标明的收件人，请您即刻删除本函，勿以任何方式使用及传播，并请您能将此误发情形通知发件人，谢谢！

保密：本函仅供收件人使用，如阁下并非抬头标明的收件人，请您即刻删除本函，勿以任何方式使用及传播，并请您能将此误发情形通知发件人，谢谢！

Yes, my modification is like you. I doubt that if the mount operation on the
host is reasonable…
And what is p9?

Best Regards

From Jiaping LI

发件人: Dominique Ramaekers [mailto:dominique.ramaekers@cometal.be]
发送时间: 2015年11月9日 15:08
收件人: 李笳平; 'libvirt-users@redhat.com'
主题: RE: [libvirt-users] How could I do the guest mount operation from the host?

For usb I meant something like:
<disk type='file' device='disk'>
        <driver name='qemu' type='qcow2'
cache='none'/>
        <source file='/kvmdata/disk/dk389_581.img'/>
        <target dev='sda' bus='usb'/>
</disk>

If you want to use fiesystem passtrough, I think you have to look at p9
filesystem. I’ve used it before and it worked like a charm. This does require
some setup in the guest…


Van: 李笳平
[mailto:lijiaping@yovole.com]<mailto:[mailto:lijiaping@yovole.com]>
Verzonden: maandag 9 november 2015 7:14
Aan: Dominique Ramaekers; 'libvirt-users@redhat.com'
Onderwerp: 答复: [libvirt-users] How could I do the guest mount operation from the
host?

Hi,
       I have tried usb and it doesn’t work. I don’t know if the filesystem tag
could work…
I find in the formatdomain docs about the filesystem:

<filesystem type='mount' accessmode='passthrough'>
      <driver type='path' wrpolicy='immediate'/>
      <source dir='/export/to/guest'/>
      <target dir='/import/from/host'/>
      <readonly/>
</filesystem>

The description of filesystem is: A directory on the host that can be accessed
directly from the guest.
I don’t know what the format should be and make the the disk image
/kvmdata/disk/dk389_581.img in the host
mount to the guest /mnt directory.

Best Regards

From Jiaping LI

发件人: Dominique Ramaekers [mailto:dominique.ramaekers@cometal.be]
发送时间: 2015年11月6日 20:54
收件人: 李笳平; 'libvirt-users@redhat.com'
主题: RE: [libvirt-users] How could I do the guest mount operation from the host?

You can attach the disk on the usb bus (<target dev='sda'
bus='sub'/> - Not 100% sure about this but probably in the right
direction) and let the guest automount usb-storage…



Van: 李笳平
[mailto:lijiaping@yovole.com]<mailto:[mailto:lijiaping@yovole.com]>
Verzonden: vrijdag 6 november 2015 10:14
Aan: Dominique Ramaekers; 'libvirt-users@redhat.com'
Onderwerp: 答复: [libvirt-users] How could I do the guest mount operation from the
host?

Hi,
       Thanks for your response!
But when I use the ssh, I need to know the guest password, and actually it
belongs to network communication. I don’t know if the libvirt has some means
just
like to control the domain to implement the operation?


Best Regards

From Jiaping LI

发件人: Dominique Ramaekers [mailto:dominique.ramaekers@cometal.be]
发送时间: 2015年11月6日 15:41
收件人: 李笳平; libvirt-users@redhat.com<mailto:libvirt-users@redhat.com>
主题: RE: [libvirt-users] How could I do the guest mount operation from the host?

Why not ssh?

Van:
libvirt-users-bounces@redhat.com<mailto:libvirt-users-bounces@redhat.com>
[mailto:libvirt-users-bounces@redhat.com]<mailto:[mailto:libvirt-users-bounces@redhat.com]>
Namens ???
Verzonden: vrijdag 6 november 2015 3:34
Aan: libvirt-users@redhat.com<mailto:libvirt-users@redhat.com>
Onderwerp: [libvirt-users] How could I do the guest mount operation from the
host?

Hi all,
       When I attach a disk like this:
<disk type='file' device='disk'>
        <driver name='qemu' type='qcow2'
cache='none'/>
        <source file='/kvmdata/disk/dk389_581.img'/>
        <backingStore/>
        <target dev='vda' bus='virtio'/>
        <alias name='virtio-disk0'/>
        <address type='pci' domain='0x0000'
bus='0x00' slot='0x07' function='0x0'/>
</disk>
And then I use “fdisk -l” on the guest, can find the disk info, if I want to
mount a disk, I should log on the guest and use the command just like:
mount /dev/vda1 /mnt
       Does Libvirt has some API which can send the guest operation(like
mount/umount) from host to guest?
Thus I can do the operation on host and need not to log on guest to do the
operation.
       Thanks!


Best Regards

From Jiaping LI


保密：本函仅供收件人使用，如阁下并非抬头标明的收件人，请您即刻删除本函，勿以任何方式使用及传播，并请您能将此误发情形通知发件人，谢谢！

保密：本函仅供收件人使用，如阁下并非抬头标明的收件人，请您即刻删除本函，勿以任何方式使用及传播，并请您能将此误发情形通知发件人，谢谢！

保密：本函仅供收件人使用，如阁下并非抬头标明的收件人，请您即刻删除本函，勿以任何方式使用及传播，并请您能将此误发情形通知发件人，谢谢！