@Serge, Hi, had a customer ping me about this bug, any updates? Here's
his explanation:
You may recall our conversation around iSCSI connectivity for binding
block volume with host in OpenStack. The host is Linux container and
block volume is on EMC VMAX. The I/O path is over iSCSI. The
environment is Ubuntu 14.04 LTS x64. Our observation and KB found from
internet is also given.
- Regular attach volume works fine (iSCSI login occurs between compute node and
array target). In this context, Compute node is a physical host
- When creating bootable volume, controller node needs to perform iSCSI login
for instance to copy. We are seeing issues with this. In this case, Compute
node is an LXC container.
- Same isciadm commands that fail within the container, run fine when running
outside the container (on physical controller host)
Looks like,
There’s a iSCSI kernel bug with mounting a target within a container
The issue is with multiple namespaces it appears.
KBs found:
https://github.com/lxc/lxc/issues/177
https://bugs.launchpad.net/ubuntu/+source/lxc/+bug/1226855
https://groups.google.com/forum/#!topic/open-iscsi/GhKfxIix4ds
Do we know whether this is fixed?
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https://bugs.launchpad.net/bugs/1226855
Title:
Cannot use open-iscsi inside LXC container
Status in linux package in Ubuntu:
Confirmed
Status in lxc package in Ubuntu:
Confirmed
Bug description:
Trying to use open-iscsi from within an LXC container, but the iscsi
netlink socket does not support multiple namespaces, causing: "iscsid:
sendmsg: bug? ctrl_fd 6" error and failure.
Command attempted: iscsiadm -m node -p $ip:$port -T $target --login
Results in:
Exit code: 18
Stdout: 'Logging in to [iface: default, target: $target, portal: $ip,$port]
(multiple)'
Stderr: 'iscsiadm: got read error (0/0), daemon died?
iscsiadm: Could not login to [iface: default, target: $target, portal:
$ip,$port].
iscsiadm: initiator reported error (18 - could not communicate to iscsid)
iscsiadm: Could not log into all portals'
ProblemType: Bug
DistroRelease: Ubuntu 13.04
Package: lxc 0.9.0-0ubuntu3.4
ProcVersionSignature: Ubuntu 3.8.0-30.44-generic 3.8.13.6
Uname: Linux 3.8.0-30-generic x86_64
ApportVersion: 2.9.2-0ubuntu8.3
Architecture: amd64
Date: Tue Sep 17 14:38:08 2013
InstallationDate: Installed on 2013-01-15 (245 days ago)
InstallationMedia: Xubuntu 12.10 "Quantal Quetzal" - Release amd64
(20121017.1)
MarkForUpload: True
SourcePackage: lxc
UpgradeStatus: Upgraded to raring on 2013-05-16 (124 days ago)
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