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On Wed, Sep 14, 2016 at 05:08:51PM +0200, Fabrice Grelaud wrote:
> Hi,
> 
> i need recommendations to setup block storage with dell storage center
> iscsi drivers.
> 
> As seen in doc
> (http://docs.openstack.org/developer/openstack-ansible/mitaka/install-guide/configure-cinder.html),
> no need for ISCSI block storage to have a separate host.
> So, i modify env.d/cinder.yml to remove "is_metal: true", and configure
> openstack_user_config.yml with:
> (http://docs.openstack.org/mitaka/config-reference/block-storage/drivers/dell-storagecenter-driver.html)
> 
> storage_hosts:
>   p-osinfra01:
>     ip: 172.29.236.11
>     container_vars:
>       cinder_storage_availability_zone: Dell_SC
>       cinder_default_availability_zone: Dell_SC
>       cinder_default_volume_type: delliscsi
>       cinder_backends:
>         limit_container_types: cinder_volume
>         delliscsi:
>           volume_driver:
> cinder.volume.drivers.dell.dell_storagecenter_iscsi.DellStorageCenterISCSIDriver
>           volume_backend_name: dell_iscsi
>           san_ip: 172.x.y.z
>           san_login: admin
>           san_password: xxxxxxxx
>           iscsi_ip_address: 10.a.b.c
>           dell_sc_ssn: 46247
>           dell_sc_api_port: 3033
>           dell_sc_server_folder: Openstack
>           dell_sc_volume_folder: Openstack
>           iscsi_port: 3260
> 
> Same for p-osinfra02 and p-osinfra03.
> 
> I launch playbook os-cinder-install.yml and i have 3 cinder-volume
> containers each on my infra hosts.
> Everything is ok.
> 
> In horizon, i can create a volume (seen on the storage center) and can
> attach this volume to an instance. Perfect !
> 
> But now, if i launch an instance with "Boot from image (create a new
> volume)", i got an error from nova "Block Device Mapping is Invalid".
> I checked my cinder-volume.log and i see:
> ERROR cinder.volume.flows.manager.create_volume
> FailedISCSITargetPortalLogin: Could not login to any iSCSI portal
> ERROR cinder.volume.manager ImageCopyFailure: Failed to copy image to
> volume: Could not login to any iSCSI portal.
> 
> I test in one container iscsi connection:
> root at p-osinfra03-cinder-volumes-container-2408e151:~# iscsiadm -m
> discovery -t sendtargets -p 10.a.b.c
> 10.a.b.c:3260,0 iqn.2002-03.com.compellent:5000d31000b4a724
> 10.a.b.c:3260,0 iqn.2002-03.com.compellent:5000d31000b4a728
> 10.a.b.c:3260,0 iqn.2002-03.com.compellent:5000d31000b4a723
> 10.a.b.c:3260,0 iqn.2002-03.com.compellent:5000d31000b4a727
> 
> But when login, i got:
> root at p-osinfra03-cinder-volumes-container-2408e151:~# iscsiadm -m node
> -T iqn.2002-03.com.compellent:5000d31000b4a724 --login
> Logging in to [iface: default, target:
> iqn.2002-03.com.compellent:5000d31000b4a724, portal: 10.a.b.c,3260]
> (multiple)
> iscsiadm: got read error (0/0), daemon died?
> iscsiadm: Could not login to [iface: default, target:
> iqn.2002-03.com.compellent:5000d31000b4a724, portal: 10.a.b.c,3260].
> iscsiadm: initiator reported error (18 - could not communicate to iscsid)
> iscsiadm: Could not log into all portals
> 
> I found in google a bug for use of open-iscsi inside lxc-container
> (https://bugs.launchpad.net/ubuntu/+source/lxc/+bug/1226855), a bug
> commented by Kevin Carter (openstack-ansible core team) as a "blocking
> issue" (in may 2015).
> 
> Is that bug still relevant ?
> Do i need to rather deploy my cinder-volume on compute host (metal) to
> solve my problem ?
> Or do you have others suggestions ?
> 
> Thanks.
> Regards,
> 
> -- 
> Fabrice Grelaud
> Université de Bordeaux

Everything else looks ok at first glance, so my guess would be that that
lxc bug is still an issue. You should be able to log in to the iSCSI
targets if you are able to connect and do the sendtargets to get the
info in the first place. That "could not communicate to iscsid" looks
very suspect.

Sean (smcginnis)

> 
> 
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