After you configure the services on the controller node, configure a second system to be a Block Storage Service node. This node contains the disk that serves volumes. You can configure OpenStack to use various storage systems. The examples in this guide show you how to configure LVM. Use the instructions in to configure the system. Note the following differences from the installation instructions for the controller node: Set the host name to block1. Ensure that the IP addresses and host names for both nodes are listed in the /etc/hosts file on each system. Follow the instructions in to synchronize from the controller node. Install the required LVM packages, if they are not already installed: # apt-get install lvm2 Create the LVM physical and logical volumes. This guide assumes a second disk /dev/sdb that is used for this purpose: # pvcreate /dev/sdb # vgcreate cinder-volumes /dev/sdb Add a filter entry to the devices section /etc/lvm/lvm.conf to keep LVM from scanning devices used by virtual machines: You must add required physical volumes for LVM on the Block Storage host. Run the pvdisplay command to get a list or required volumes. Each item in the filter array starts with either an a for accept, or an r for reject. The physical volumes that are required on the Block Storage host have names that begin with a. The array must end with "r/.*/" to reject any device not listed. In this example, /dev/sda1 is the volume where the volumes for the operating system for the node reside, while /dev/sdb is the volume reserved for cinder-volumes. devices { ... filter = [ "a/sda1/", "a/sdb/", "r/.*/"] ... } After you configure the operating system, install the appropriate packages for the Block Storage Service: # apt-get install cinder-volume # yum install openstack-cinder # zypper install openstack-cinder-volume Respond to the debconf prompts about the database management, [keystone_authtoken] settings, and RabbitMQ credentials. Make sure to enter the same details as your Block Storage Service controller node. Another screen prompts you for the volume-group to use. The Debian package configuration script detects every active volume group, provided that the lvm2 package is installed before Block Storage (this should be the case if you configured the volume group first, as this guide recommends), and tries to use the first one it sees. If you have only one active volume group on your Block Storage Service node, you do not need to manually enter its name in when you install the cinder-volume package because it is detected automatically. If no volume-group is available when you install cinder-common, you must manually configure or re-configure cinder-common by using dpkg-reconfigure. Copy the /etc/cinder/api-paste.ini file from the controller, or open the file in a text editor and locate the section [filter:authtoken]. Make sure the following options are set: [filter:authtoken] paste.filter_factory=keystoneclient.middleware.auth_token:filter_factory auth_host=controller auth_port = 35357 auth_protocol = http admin_tenant_name=service admin_user=cinder admin_password=CINDER_PASS Configure Block Storage to use the RabbitMQ message broker by setting these configuration keys in the [DEFAULT] configuration group of the /etc/cinder/cinder.conf file. Replace RABBIT_PASS with the password you chose for RabbitMQ. [DEFAULT] ... rpc_backend = cinder.openstack.common.rpc.impl_kombu rabbit_host = controller rabbit_port = 5672 rabbit_userid = guest rabbit_password = RABBIT_PASS Configure Block Storage to use the Qpid message broker. # openstack-config --set /etc/cinder/cinder.conf \ DEFAULT rpc_backend cinder.openstack.common.rpc.impl_qpid # openstack-config --set /etc/cinder/cinder.conf \ DEFAULT qpid_hostname controller Configure Block Storage to use the RabbitMQ message broker. Replace RABBIT_PASS with the password you chose for RabbitMQ. # openstack-config --set /etc/cinder/cinder.conf \ DEFAULT rpc_backend cinder.openstack.common.rpc.impl_kombu # openstack-config --set /etc/cinder/cinder.conf \ DEFAULT rabbit_host controller # openstack-config --set /etc/cinder/cinder.conf \ DEFAULT rabbit_port 5672 # openstack-config --set /etc/cinder/cinder.conf \ DEFAULT rabbit_password RABBIT_PASS Configure Block Storage to use your MySQL database. Edit the /etc/cinder/cinder.conf file and add the following key under the [database] section. Replace CINDER_DBPASS with the password you chose for the Block Storage database. The /etc/cinder/cinder.conf file packaged with some distributions does not include the [database] section header. You must add this section header to the end of the file before proceeding further. # openstack-config --set /etc/cinder/cinder.conf \ database connection mysql://cinder:CINDER_DBPASS@controller/cinder [database] ... connection = mysql://cinder:CINDER_DBPASS@controller/cinder Restart the cinder service with its new settings: # service cinder-volume restart # service tgt restart Configure the iSCSI target service to discover cinder volumes. Add the following line to the beginning of the /etc/tgt/targets.conf file, if it is not already present: include /etc/cinder/volumes/* Start the cinder services and configure them to start when the system boots: # service openstack-cinder-volume start # service tgtd start # chkconfig openstack-cinder-volume on # chkconfig tgtd on