Re: [CentOS-virt] Can't block-attach a file on a read only volume?
On Mon, Mar 16, 2015 at 1:15 PM, George Dunlap wrote: > On Fri, Mar 13, 2015 at 5:58 PM, Nathan March wrote: >>> http://cbs.centos.org/kojifiles/work/tasks/8801/8801/ >>> >>> If you could test those and let me know if it fixes your problem, I'd >>> appreciate it. :-) >> >> Confirmed, both issues are fixed. Thanks! Any plans to push those packages >> to main mirrors? > > Yep. :-) I've done a normal build so that it appears on the CBS in > virt6-testing. I'll leave it there for a couple of weeks for people > to test, then push it to the main mirror. FYI there will be an update coming out in the public repos around 31 March with XSAs 125-127 (http://xenbits.xen.org/xsa/). That update will include this fix in it as well (unless we find a bug in the mean time of course). -George ___ CentOS-virt mailing list CentOS-virt@centos.org http://lists.centos.org/mailman/listinfo/centos-virt
Re: [CentOS-virt] Can't block-attach a file on a read only volume?
On Fri, Mar 13, 2015 at 5:58 PM, Nathan March wrote: >> http://cbs.centos.org/kojifiles/work/tasks/8801/8801/ >> >> If you could test those and let me know if it fixes your problem, I'd >> appreciate it. :-) > > Confirmed, both issues are fixed. Thanks! Any plans to push those packages to > main mirrors? Yep. :-) I've done a normal build so that it appears on the CBS in virt6-testing. I'll leave it there for a couple of weeks for people to test, then push it to the main mirror. -George ___ CentOS-virt mailing list CentOS-virt@centos.org http://lists.centos.org/mailman/listinfo/centos-virt
Re: [CentOS-virt] Can't block-attach a file on a read only volume?
> http://cbs.centos.org/kojifiles/work/tasks/8801/8801/ > > If you could test those and let me know if it fixes your problem, I'd > appreciate it. :-) Confirmed, both issues are fixed. Thanks! Any plans to push those packages to main mirrors? - Nathan ___ CentOS-virt mailing list CentOS-virt@centos.org http://lists.centos.org/mailman/listinfo/centos-virt
Re: [CentOS-virt] Can't block-attach a file on a read only volume?
On Thu, Mar 12, 2015 at 8:05 PM, Nathan March wrote: > xendev01 ~ # mount -o remount,ro /mnt/test > > > > xendev01 ~ # /usr/sbin/xl block-attach nathannx "file:/mnt/test/disk" > "xvdd4" > > DEBUG libxl__blktap_devpath 37 aio:/mnt/test/disk > > libxl: error: libxl.c:2149:device_disk_add: failed to get blktap devpath for > 0xd3abd0 > > libxl: error: libxl.c:1727:device_addrm_aocomplete: unable to (null) device > > libxl_device_disk_add failed. > > > > I'm not sure why xen would care if the disk is writable? Would be nice to be > able to mount these since many NFS storage arrays provide read only access > to snapshots. So by default, block-attach will set the access to a disk as read-write. If disk access is marked as read-write, the backend (in this case tapdisk) will attempt to open the file read-write; if this fails (as it will on read-only storage), the whole disk creation will fail. (This is true either of block-attach or domain creation.) Normally you could fix this by adding ",ro" to your disk spec. But in the case of blktap, this option is ignored at the moment. :-/ I have, however, just taught xl to pay attention to this for blktap. I've got fixes to both this issue and the extra-tapdisk-process issue from the other thread in this local koji build: http://cbs.centos.org/kojifiles/work/tasks/8801/8801/ If you could test those and let me know if it fixes your problem, I'd appreciate it. :-) As an aside, you're using the old disk format; the new disk format looks more like this: "vdev=hdc,format=raw,access=rw,target=/mnt/test/disk" More info here: /usr/share/doc/xen-doc-4.4.1/misc/xl-disk-configuration.txt Thanks, -George ___ CentOS-virt mailing list CentOS-virt@centos.org http://lists.centos.org/mailman/listinfo/centos-virt
