[Openstack-operators] Cinder with iscsi in a different IP that the cinder-api IP

Juan José Pavlik Salles jjpavlik at gmail.com
Fri Aug 9 21:16:36 UTC 2013

Hi guys, we are using cinder with LVM+iscsi as block storage and it works
great so far. Now we want to change one little thing, this is what we have

compute-node1: eth0=
storage-node1: eth0=

This way everything works fine, but we want to separate the cloud admin
network ( from the block storage access network (

We want this new config:

compute-node1: eth0= eth1=
storage-node1: eth0= eth1=

No problems so far, but when i attach a cinder volume to an instance the
iscsi connection goes through<-> when i'd like
it to go through<->

Looking in nova-compute.log i found:

2013-08-09 20:46:40.737 DEBUG nova.utils
[req-3d8bcf5c-9406-4681-b8e4-3a0e784098ed 20390b639d4449c18926dca5e038ec5e
d1e3aae242f14c488d2225dcbf1e96d6] Running cmd (subprocess): sudo
nova-rootwrap /etc/nova/rootwrap.conf iscsiadm -m node -T
iqn.2010-10.org.openstack:volume-a090f312-f419-40c3-ba86-1017a82e0968 -p --op update -n node.startup -v automatic execute

That explains why the connection goes that way, and maybe there's a place
where i can tell cinder what interface i want it to expose. It seems that
it's using the same IP as the API.

I tried using


in cinder.conf but didn't work.

Is it possible?


Pavlik Salles Juan José
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