[libvirt-users] error: argument unsupported: unable to handle disk requests in snapshot
Hello, a problem occurred during making a snapshot for a guest, ask for help... 1. the xml for snapshotdomain like this: # cat deployment.1 <domainsnapshot> <name>a</name> <disks> <disk name='/home/qcow2/disk.0'> <driver type='qcow2'/> <source file='/home/qcow2/disk.3'/> </disk> </disks> </domainsnapshot> 2. when i execute the command , a mistake occurred: # virsh snapshot-create qcow2 deployment.1 error: argument unsupported: unable to handle disk requests in snapshot 3. i add the parameter '--disk-only', another mistake occurred: # virsh snapshot-create qcow2 deployment.1 --disk-only error: Failed to take snapshot: unknown command: 'snapshot_blkdev' 4. my libvirtd version is 0.9.4 , i update to 1.0.0 , also had this problem # libvirtd --version libvirtd (libvirt) 1.0.0 5. this is my guest below: # ls -l -rw-r--r-- 1 oneadmin oneadmin 1540 2012-11-27 15:27 deployment.0 -rw-r--r-- 1 root root 204 2012-11-27 21:28 deployment.1 -rw-r--r-- 1 root root 5772345344 2012-11-28 17:42 disk.0 -rw-r--r-- 1 root root 459264 2012-11-27 21:02 disk.1 -rw-r--r-- 1 root root 372736 2012-11-27 15:25 disk.2 # virsh list Id 名� �� ---------------------------------------------------- 1 qcow2 running # qemu-img info disk.0 image: disk.0 file format: qcow2 virtual size: 20G (21474836480 bytes) disk size: 5.4G cluster_size: 65536 Snapshot list: ID TAG VM SIZE DATE VM CLOCK 1 1354019482 142M 2012-11-27 20:31:22 00:00:08.971 is there anyone has the same problem with me ? 于长江 | 东软 --------------------------------------------------------------------------------------------------- Confidentiality Notice: The information contained in this e-mail and any accompanying attachment(s) is intended only for the use of the intended recipient and may be confidential and/or privileged of Neusoft Corporation, its subsidiaries and/or its affiliates. If any reader of this communication is not the intended recipient, unauthorized use, forwarding, printing, storing, disclosure or copying is strictly prohibited, and may be unlawful.If you have received this communication in error,please immediately notify the sender by return e-mail, and delete the original message and all copies from your system. Thank you. ---------------------------------------------------------------------------------------------------
Hello, a problem occurred during making a snapshot for a guest, ask for help...
1. the xml for snapshotdomain like this: # cat deployment.1 <domainsnapshot> <name>a</name> <disks> <disk name='/home/qcow2/disk.0'> <driver type='qcow2'/> <source file='/home/qcow2/disk.3'/> </disk>
This says that you want to create an external snapshot...
</disks> </domainsnapshot>
2. when i execute the command , a mistake occurred: # virsh snapshot-create qcow2 deployment.1
But this did not request the --disk-only flag, and was not executed with (unreleased) libvirt 1.0.1. Older libvirt doesn't support external snapshots without the --disk-only flag (but the next release will; assuming that you have new enough qemu).
error: argument unsupported: unable to handle disk requests in snapshot
3. i add the parameter '--disk-only', another mistake occurred: # virsh snapshot-create qcow2 deployment.1 --disk-only error: Failed to take snapshot: unknown command: 'snapshot_blkdev'
This says your qemu is too old. External snapshots were not possible until upstream qemu 1.2; it is also available if you use RHEV 3.0 from Red Hat (but NOT if you use RHEL 6.3).
is there anyone has the same problem with me ?
Yes, since you are trying code that hasn't been implemented for the versions of software you have installed.
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Thank you for your answer, i'll update my qemu to 1.2, and try again. 于长江 | 东软 From: Eric Blake Date: 2012-11-30 23:11 To: 于长江 CC: libvirt-users Subject: Re: [libvirt-users] error: argument unsupported: unable to handle disk requests in snapshot
Hello, a problem occurred during making a snapshot for a guest, ask for help...
1. the xml for snapshotdomain like this: # cat deployment.1 <domainsnapshot> <name>a</name> <disks> <disk name='/home/qcow2/disk.0'> <driver type='qcow2'/> <source file='/home/qcow2/disk.3'/> </disk>
This says that you want to create an external snapshot...
</disks> </domainsnapshot>
2. when i execute the command , a mistake occurred: # virsh snapshot-create qcow2 deployment.1
But this did not request the --disk-only flag, and was not executed with (unreleased) libvirt 1.0.1. Older libvirt doesn't support external snapshots without the --disk-only flag (but the next release will; assuming that you have new enough qemu).
error: argument unsupported: unable to handle disk requests in snapshot
3. i add the parameter '--disk-only', another mistake occurred: # virsh snapshot-create qcow2 deployment.1 --disk-only error: Failed to take snapshot: unknown command: 'snapshot_blkdev'
This says your qemu is too old. External snapshots were not possible until upstream qemu 1.2; it is also available if you use RHEV 3.0 from Red Hat (but NOT if you use RHEL 6.3).
is there anyone has the same problem with me ?
Yes, since you are trying code that hasn't been implemented for the versions of software you have installed.
Confidentiality Notice: The information contained in this e-mail and
This disclaimer is unenforceable on a publicly-archived list. For netiquette reasons, it is considered better to send mail from a personal account so as to avoid your employer's useless legalese when posting to public lists. --------------------------------------------------------------------------------------------------- Confidentiality Notice: The information contained in this e-mail and any accompanying attachment(s) is intended only for the use of the intended recipient and may be confidential and/or privileged of Neusoft Corporation, its subsidiaries and/or its affiliates. If any reader of this communication is not the intended recipient, unauthorized use, forwarding, printing, storing, disclosure or copying is strictly prohibited, and may be unlawful.If you have received this communication in error,please immediately notify the sender by return e-mail, and delete the original message and all copies from your system. Thank you. ---------------------------------------------------------------------------------------------------
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