On 12/17/2013 07:13 PM, Marco wrote: > Hi! > > I'm new to libvirt and face problems connecting to an iSCSI target. > What I intend to do is to connect libvirt (I tried virt-manager and > virsh) to an iSCSI target and then boot from the LUNs which contain > the VMs. > > I followed the documentation¹ but got stuck at section 12.1.5.4.3. > > 1) > virsh pool-define-as \ > --name foo \ > --type iscsi \ > --source-host vmhost \ > --source-dev iqn.2013-11.vmhost:vmpool \ > --target /dev/disk/by-path > > 2) > virsh pool-start foo > error: Failed to start pool foo > error: internal error: cannot find session > > virsh -c qemu:///system pool-start foo > error: Failed to start pool foo > error: internal error: cannot find session > I'm assuming 'vmhost' is actually some valid IP Address/Name that you're just using here to hide from the world your actual iSCSI tgt server. Don't forget that the 'source-host' may be listed as 'host1.example.com'; however, the iqn has 'com.example.host1'. IOW - reversed... Have you looked at http://libvirt.org/formatstorage.html ? There's an example there of output that works for me. Use virsh pool-dumpxml <pool> to view the XML... Also, do you need to authenticate to the iSCSI target? The iscsiadm will use '/etc/iscsi/iscsid.conf'. See the node.session.auth.{authmethod | username | password} fields, so while iscsiadm may work, when libvirt goes to connect it fails. Looking at the output in the system messages log may help (for my f19 /var/log/messages). You may also find if you have selinux enabled as Enforcing there could be more configuration that you need (if the iSCSI tgtd is local). Setting up a label on the file - something I'm not an expert at... Another tool to try is 'iscsi-ls' from package 'libiscsi-utils' iscsi-ls -s -i iqn.2013-11.vmhost:vmpool \ iscsi://<username>%<password>@<ipAddr>:3260 where the <username>/<password> allow the authentication to the ipAddr iSCSI tgt server. If you need to authenticate, then set up a secret to the iSCSI server, see http://libvirt.org/formatsecret.html for an example. HTH, John > Why can't libvirt find the session, and which session? Running > > iscsiadm --mode discovery --type sendtargets --portal vmhost:3260,1 > > succeeds and lists the targets. How to connect libvirt to the iSCSI > target? > > System info: > > Debian sid, Linux 3.11-2-amd64 > libvirtd (libvirt) 1.1.4 > virsh version: 1.1.4 What's your QEMU version? > > iSCSI target: FreeNAS-9.1.1 > > > Best regards > Marco > > ¹ https://access.redhat.com/site/documentation/en-US/Red_Hat_Enterprise_Linux/6/html/Virtualization_Administration_Guide/chap-Virtualization_Administration_Guide-Storage_Pools-Storage_Pools.html#sect-Virtualization-Storage_Pools-Creating-iSCSI > > _______________________________________________ > libvirt-users mailing list > libvirt-users@xxxxxxxxxx > https://www.redhat.com/mailman/listinfo/libvirt-users > _______________________________________________ libvirt-users mailing list libvirt-users@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/libvirt-users
