198 lines
9.5 KiB
XML
198 lines
9.5 KiB
XML
<section xmlns="http://docbook.org/ns/docbook"
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xmlns:xi="http://www.w3.org/2001/XInclude"
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xmlns:xlink="http://www.w3.org/1999/xlink" version="5.0"
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xml:id="cinder-node">
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<?dbhtml-stop-chunking?>
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<title>Configure a Block Storage Service node</title>
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<para>After you configure the services on the controller node,
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configure a second system to be a Block Storage Service node. This
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node contains the disk that serves volumes.</para>
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<para>You can configure OpenStack to use various storage systems.
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The examples in this guide show you how to configure LVM.</para>
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<procedure>
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<step>
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<para>Use the instructions in <xref linkend="ch_basics"/> to
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configure the system. Note the following differences from the
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installation instructions for the controller node:</para>
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<itemizedlist>
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<listitem>
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<para>Set the host name to <literal>block1</literal>. Ensure
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that the IP addresses and host names for both nodes are
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listed in the <filename>/etc/hosts</filename> file on each
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system.</para>
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</listitem>
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<listitem>
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<para>Follow the instructions in <xref linkend="basics-ntp"
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/> to synchronize from the controller node.</para>
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</listitem>
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</itemizedlist>
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</step>
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<step os="ubuntu">
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<para>
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Install the required LVM packages, if they are not already installed:
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<screen><prompt>#</prompt> <userinput>apt-get install lvm2</userinput></screen>
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</para>
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</step>
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<step>
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<para>Create the
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LVM physical and logical volumes. This guide assumes a second
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disk <literal>/dev/sdb</literal> that is used for this
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purpose:</para>
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<screen><prompt>#</prompt> <userinput>pvcreate /dev/sdb</userinput>
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<prompt>#</prompt> <userinput>vgcreate cinder-volumes /dev/sdb</userinput></screen>
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</step>
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<step>
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<para>Add a filter entry to the devices section
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<filename>/etc/lvm/lvm.conf</filename> to keep LVM from
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scanning devices used by virtual machines:</para>
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<note>
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<para>You must add required physical volumes for LVM on the
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Block Storage host. Run the <command>pvdisplay</command>
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command to get a list or required volumes.</para>
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</note>
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<para>Each item in the filter array starts with either an
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<literal>a</literal> for accept, or an
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<literal>r</literal> for reject. The physical volumes that
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are required on the Block Storage host have names that begin
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with <literal>a</literal>. The array must end with
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"<literal>r/.*/</literal>" to reject any device not listed.</para>
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<para>In this example, <literal>/dev/sda1</literal> is the
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volume where the volumes for the operating system for the node
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reside, while <literal>/dev/sdb</literal> is the volume
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reserved for <literal>cinder-volumes</literal>.</para>
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<programlisting>devices {
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...
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filter = [ "a/sda1/", "a/sdb/", "r/.*/"]
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...
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}</programlisting>
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</step>
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<step>
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<para>After you configure the operating system, install the
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appropriate packages for the Block Storage Service:</para>
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<screen os="ubuntu;debian"><prompt>#</prompt> <userinput>apt-get install cinder-volume</userinput></screen>
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<screen os="centos;rhel;fedora"><prompt>#</prompt> <userinput>yum install openstack-cinder openstack-utils</userinput></screen>
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<screen os="opensuse;sles"><prompt>#</prompt> <userinput>zypper install openstack-cinder-volume</userinput></screen>
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</step>
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<step os="debian">
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<para>Respond to the <systemitem class="library"
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>debconf</systemitem> prompts about the <link
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linkend="debconf-dbconfig-common">database
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management</link>, <link linkend="debconf-keystone_authtoken"
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><literal>[keystone_authtoken]</literal> settings</link>,
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and <link linkend="debconf-rabbitqm">RabbitMQ
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credentials</link>. Make sure to enter the same details as
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your Block Storage Service controller node.</para>
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<para>Another screen prompts you for the <systemitem
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class="library">volume-group</systemitem> to use. The Debian
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package configuration script detects every active volume
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group, provided that the <systemitem class="library"
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>lvm2</systemitem> package is installed before Block Storage
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(this should be the case if you configured the volume group first,
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as this guide recommends), and tries to use the first one it
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sees. If you have only one active volume group on your Block
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Storage Service node, you do not need to manually enter its
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name in when you install the <systemitem class="service"
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>cinder-volume</systemitem> package because it is detected
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automatically. If no <systemitem class="library"
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>volume-group</systemitem> is available when you install
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<systemitem class="service">cinder-common</systemitem>, you
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must manually configure or re-configure <systemitem
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class="service">cinder-common</systemitem> by using
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<command>dpkg-reconfigure</command>.</para>
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</step>
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<step os="centos;rhel;fedora;opensuse;sles;ubuntu">
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<para>Copy the <filename>/etc/cinder/api-paste.ini</filename>
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file from the controller, or open the file in a text editor
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and locate the section <literal>[filter:authtoken]</literal>.
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Make sure the following options are set:</para>
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<programlisting language="ini">[filter:authtoken]
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paste.filter_factory=keystoneclient.middleware.auth_token:filter_factory
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auth_host=<replaceable>controller</replaceable>
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auth_port = 35357
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auth_protocol = http
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admin_tenant_name=service
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admin_user=cinder
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admin_password=<replaceable>CINDER_PASS</replaceable></programlisting>
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</step>
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<step os="ubuntu">
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<para>Configure Block Storage to use the RabbitMQ message
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broker by setting these configuration keys in the
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<literal>[DEFAULT]</literal> configuration group of the
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<filename>/etc/cinder/cinder.conf</filename> file. Replace
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<replaceable>RABBIT_PASS</replaceable> with the password you
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chose for RabbitMQ.</para>
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<programlisting language="ini">[DEFAULT]
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...
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rpc_backend = cinder.openstack.common.rpc.impl_kombu
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rabbit_host = <replaceable>controller</replaceable>
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rabbit_port = 5672
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rabbit_userid = guest
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rabbit_password = <replaceable>RABBIT_PASS</replaceable></programlisting>
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</step>
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<step os="rhel;centos;fedora">
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<para>Configure Block Storage to use the Qpid message broker.</para>
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<screen os="rhel;centos;fedora"><prompt>#</prompt> <userinput>openstack-config --set /etc/cinder/cinder.conf \
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DEFAULT rpc_backend cinder.openstack.common.rpc.impl_qpid</userinput>
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<prompt>#</prompt> <userinput>openstack-config --set /etc/cinder/cinder.conf \
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DEFAULT qpid_hostname controller</userinput></screen>
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</step>
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<step os="sles;opensuse">
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<para>Configure Block Storage to use the RabbitMQ message broker.
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Replace <replaceable>RABBIT_PASS</replaceable> with the password
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you chose for RabbitMQ.</para>
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<screen><prompt>#</prompt> <userinput>openstack-config --set /etc/cinder/cinder.conf \
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DEFAULT rpc_backend cinder.openstack.common.rpc.impl_kombu</userinput>
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<prompt>#</prompt> <userinput>openstack-config --set /etc/cinder/cinder.conf \
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DEFAULT rabbit_host controller</userinput>
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<prompt>#</prompt> <userinput>openstack-config --set /etc/cinder/cinder.conf \
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DEFAULT rabbit_port 5672</userinput>
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<prompt>#</prompt> <userinput>openstack-config --set /etc/cinder/cinder.conf \
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DEFAULT rabbit_password <replaceable>RABBIT_PASS</replaceable></userinput></screen>
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</step>
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<step os="ubuntu;rhel;centos;fedora;opensuse;sles">
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<para>Configure the Block Storage Service on this node to use
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the Cinder database on the controller node:</para>
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<screen os="rhel;centos;fedora;opensuse;sles"><prompt>#</prompt> <userinput>openstack-config --set /etc/cinder/cinder.conf \
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database connection mysql://cinder:<replaceable>CINDER_DBPASS</replaceable>@<replaceable>controller</replaceable>/cinder</userinput></screen>
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<para os="ubuntu">Edit
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<filename>/etc/cinder/cinder.conf</filename> and change the
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<literal>[database]</literal> section:</para>
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<programlisting os="ubuntu" language="ini">[database]
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...
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# The SQLAlchemy connection string used to connect to the
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# database (string value)
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connection = mysql://cinder:CINDER_DBPASS@controller/cinder
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...</programlisting>
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</step>
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<step os="ubuntu">
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<para>Restart the cinder service with its new settings:</para>
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<screen><prompt>#</prompt> <userinput>service cinder-volume restart</userinput>
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<prompt>#</prompt> <userinput>service tgt restart</userinput></screen>
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</step>
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<step os="rhel;fedora;centos">
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<para>Configure the ISCI target service to discover cinder
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volumes. Add the following line to the beginning of the
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<filename>/etc/tgt/targets.conf</filename> file, if it is
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not already present:</para>
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<programlisting>include /etc/cinder/volumes/*</programlisting>
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</step>
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<step os="rhel;fedora;centos;opensuse;sles">
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<para>Start the cinder services and configure them to start when
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the system boots:</para>
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<screen>
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<prompt>#</prompt> <userinput>service openstack-cinder-volume start</userinput>
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<prompt>#</prompt> <userinput>service tgtd start</userinput>
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<prompt>#</prompt> <userinput>chkconfig openstack-cinder-volume on</userinput>
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<prompt>#</prompt> <userinput>chkconfig tgtd on</userinput></screen>
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</step>
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</procedure>
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</section>
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