Configure a Block Storage service node

Use the instructions in Chapter 2, Basic environment configuration to configure the system. Note the following differences from the installation instructions for 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 in the /etc/lvm/lvm.conf file to keep LVM from scanning devices used by virtual machines:

devices {
...
filter = [ "a/sda1/", "a/sdb/", "r/.*/"]
...
}

	Note
	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.

After you configure the operating system, install the appropriate packages for the Block Storage service:

# apt-get install cinder-volume

Edit the /etc/cinder/cinder.conf configuration file and add this section for keystone credentials:

...
[keystone_authtoken]
auth_uri = http://controller:5000
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.

In the [DEFAULT] configuration section of the /etc/cinder/cinder.conf file, set these configuration keys and 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 your MySQL database. Edit the /etc/cinder/cinder.conf file and add the following key to the [database] section. Replace CINDER_DBPASS with the password you chose for the Block Storage database:

[database]
...
connection = mysql://cinder:CINDER_DBPASS@controller/cinder

	Note
	In some distributions, the /etc/cinder/cinder.conf file does not include the [database] section header. You must add this section header to the end of the file before you proceed.

Configure Block Storage to use the Image Service. Block Storage needs access to images to create bootable volumes. Edit the /etc/cinder/cinder.conf file and update the glance_host option in the [DEFAULT] section:

[DEFAULT]
...
glance_host = controller

Restart the Block Storage services with the new settings:

# service cinder-volume restart
# service tgt restart