Red Hat Bugzilla – Bug 1079173
libvirt can not do vol-download for gluster pool volume
Last modified: 2015-03-05 02:33:13 EST
Created attachment 877133 [details] libvirtd.log Description of problem: libvirt can not do vol-download for gluster pool volume Version-Release number of selected component (if applicable): libvirt-1.1.1-28.el7.x86_64 qemu-kvm-rhev-1.5.3-55.el7.x86_64 How reproducible: 100% Steps to Reproduce: 1. Create gluster volume # gluster volume create gluster-vol1 xx.xx.xx.xx:/br1 force volume create: gluster-vol1: success: please start the volume to access data # gluster volume start gluster-vol1 volume start: gluster-vol1: success # qemu-img create gluster://xx.xx.xx.xx/gluster-vol1/rh.img 1G Formatting 'gluster://xx.xx.xx.xx/gluster-vol1/rh.img', fmt=raw size=1073741824 2. Create pool # virsh pool-create /tmp/pool.xml Pool gluster-pool created from /tmp/pool.xml # virsh vol-list gluster-pool Name Path ----------------------------------------- rh.img gluster://xx.xx.xx.xx/gluster-vol1/rh.img 3. do vol-download # virsh vol-download rh.img /tmp/tt. tt.img tt.xml [root@4-196 virt-test]# virsh vol-download rh.img /tmp/tt.download --pool gluster-pool error: cannot download from volume rh.img error: Unable to open stream for 'gluster://xx.xx.xx.xx/gluster-vol1/rh.img': No such file or directory Actual results: Fail to download Expected results: Succeed to download Additional info:
The error message is wrong, we don't support the operation on gluster volumes. I've fixed the error reporting with: commit 589c2ad93fa0eab8a093037ee95391619f700eb0 Author: Peter Krempa <pkrempa@redhat.com> Date: Mon Jul 7 16:50:11 2014 +0200 storage: Split out volume upload/download as separate backend function For non-local storage drivers we can't expect to use the FDStream backend for up/downloading volumes. Split the code into a separate backend function so that we can add protocol specific code later. v1.2.6-120-g589c2ad And cloned this bug as https://bugzilla.redhat.com/show_bug.cgi?id=1118756 that tracks the feature request to add volume download/upload on gluster.
Verify this bug with the following package version: libvirt-1.2.8-11.el7.x86_64 qemu-img-rhev-2.1.2-17.el7.x86_64 kernel-3.10.0-219.el7.x86_64 Steps: 1. prepare one gluster pool, there are some volumes in the pool # virsh pool-list Name State Autostart ------------------------------------------- default active yes gluster-pool active no # virsh vol-list gluster-pool Name Path ------------------------------------------------------------------------------ test.qcow2 gluster://#glusterServerIP#/gluster-vol1/test.qcow2 test.raw gluster://#glusterServerIP#/gluster-vol1/test.raw 2. download one volume to local will fail with the correct error message. # virsh vol-download test.qcow2 /tmp/test.download --pool gluster-pool error: cannot download from volume test.qcow2 error: this function is not supported by the connection driver: storage pool doesn't support volume download Change the bug status to verify.
Since the problem described in this bug report should be resolved in a recent advisory, it has been closed with a resolution of ERRATA. For information on the advisory, and where to find the updated files, follow the link below. If the solution does not work for you, open a new bug report. https://rhn.redhat.com/errata/RHSA-2015-0323.html