OpenStack Compute (nova)

Multi-node: nova-volume and nova-compute

Asked by Gaurav Gupta

I have 2 hosts, running all the nova services:

Host1:
=====
root@Host1:cred# nova-manage service list
Binary Host Zone Status State Updated_At
nova-scheduler Host1 nova enabled :-) 2011-08-22 20:00:57.966621
nova-network Host1 nova enabled :-) 2011-08-22 20:00:57.837392
nova-vncproxy Host1 nova enabled :-) 2011-08-22 20:00:49.865538
nova-compute Host1 nova enabled :-) 2011-08-22 20:00:56.447137

Host2:
=====
root@Host2:cred# nova-manage service list
Binary Host Zone Status State Updated_At
nova-scheduler Host2 nova enabled :-) 2011-08-22 20:03:05.654425
nova-volume Host2 nova enabled :-) 2011-08-22 20:02:58.396701
nova-network Host2 nova enabled :-) 2011-08-22 20:03:04.137767
nova-compute Host2 nova enabled :-) 2011-08-22 20:03:04.231711
nova-vncproxy Host2 nova enabled :-) 2011-08-22 20:03:05.536724

Only Host2 is running the nova-volume service. On Host2, I can successfully create/attach/detach volumes to the instances running on the same host. How do I update the nova configuration on Host1 to access volumes on Host2?

nova-volumes is configured to use iscsitarget and LVM volumes. Here is my nova.conf for Host2:
--verbose
--nodaemon
--dhcpbridge_flagfile=/home/admin/openstack/nova/bin/nova.conf
--network_manager=nova.network.manager.VlanManager
--my_ip=192.168.1.199
--public_interface=eth0
--vlan_interface=eth0
--sql_connection=sqlite:////home/admin/openstack/nova/nova.sqlite
--auth_driver=nova.auth.dbdriver.DbDriver
--libvirt_type=qemu
--osapi_extensions_path=/home/admin/openstack/openstackx/extensions
--vncproxy_url=http://192.168.1.199:6080
--vncproxy_wwwroot=/home/admin/openstack/noVNC/noVNC
--api_paste_config=/home/admin/openstack/keystone/examples/paste/nova-api-paste.ini
--image_service=nova.image.glance.GlanceImageService
--state_path=/home/admin/openstack/nova/CA
--iscsi_ip_prefix=192.168.
--logdir=/var/log/nova

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Gaurav Gupta
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Gaurav Gupta (gagupta) said : 		#1

All I had to do is update nova.conf on Host1 and restart the compute service on Host1. Here are two flags that I changed:
--my_ip=192.168.1.199
--iscsi_ip_prefix=192.168.

In addition to this, I had to change the novarc file on Host1 to point to Host2, otherwise commands will fail with an authentication error.