bcec02416e
Another round of typos/spelling errors fixing, in particular for config-reference, HA guide and image guide. Change-Id: Ibc3661e132a0ea4010a5a61f71ef5209ae6655b6 Closes-Bug: #1356970
467 lines
26 KiB
XML
467 lines
26 KiB
XML
<!DOCTYPE section [
|
|
<!ENTITY % openstack SYSTEM "../../../common/entities/openstack.ent">
|
|
%openstack;
|
|
]>
|
|
<section xml:id="hds-volume-driver"
|
|
xmlns="http://docbook.org/ns/docbook"
|
|
xmlns:xi="http://www.w3.org/2001/XInclude"
|
|
xmlns:xlink="http://www.w3.org/1999/xlink" version="5.0">
|
|
<title>HDS HUS iSCSI driver</title>
|
|
<para>This Block Storage volume driver provides iSCSI support for <link
|
|
xlink:href="http://www.hds.com/products/storage-systems/hitachi-unified-storage-100-family.html"
|
|
>HUS (Hitachi Unified Storage) </link> arrays such as,
|
|
HUS-110, HUS-130, and HUS-150.</para>
|
|
<section xml:id="hds-reqs">
|
|
<title>System requirements</title>
|
|
<para>Use the HDS <command>hus-cmd</command> command to
|
|
communicate with an HUS array. You can download this
|
|
utility package from the HDS support site (<link
|
|
xlink:href="https://HDSSupport.hds.com"
|
|
>https://HDSSupport.hds.com</link>).</para>
|
|
<para>Platform: Ubuntu 12.04 LTS or newer.</para>
|
|
</section>
|
|
<section xml:id="hds-supported-operations">
|
|
<title>Supported operations</title>
|
|
<para>These operations are supported:</para>
|
|
<itemizedlist>
|
|
<listitem>
|
|
<para>Create volume</para>
|
|
</listitem>
|
|
<listitem>
|
|
<para>Delete volume</para>
|
|
</listitem>
|
|
<listitem>
|
|
<para>Attach volume</para>
|
|
</listitem>
|
|
<listitem>
|
|
<para>Detach volume</para>
|
|
</listitem>
|
|
<listitem>
|
|
<para>Clone volume</para>
|
|
</listitem>
|
|
<listitem>
|
|
<para>Extend volume</para>
|
|
</listitem>
|
|
<listitem>
|
|
<para>Create snapshot</para>
|
|
</listitem>
|
|
<listitem>
|
|
<para>Delete snapshot</para>
|
|
</listitem>
|
|
<listitem>
|
|
<para>Copy image to volume</para>
|
|
</listitem>
|
|
<listitem>
|
|
<para>Copy volume to image</para>
|
|
</listitem>
|
|
<listitem>
|
|
<para>Create volume from snapshot</para>
|
|
</listitem>
|
|
<listitem>
|
|
<para>Get statistics</para>
|
|
</listitem>
|
|
</itemizedlist>
|
|
</section>
|
|
<section xml:id="hds-config">
|
|
<title>Configuration</title>
|
|
<para>The HDS driver supports the concept of differentiated
|
|
services, where a volume type can be associated with the
|
|
fine-tuned performance characteristics of an HDP—
|
|
the dynamic pool where volumes are created<footnote xml:id="hds-fn-svc-1">
|
|
<para>Do not confuse differentiated services with the
|
|
OpenStack Block Storage volume services.</para>
|
|
</footnote>. For instance, an HDP can consist of fast SSDs
|
|
to provide speed. HDP can provide a certain reliability
|
|
based on things like its RAID level characteristics. HDS
|
|
driver maps volume type to the
|
|
<option>volume_type</option> option in its
|
|
configuration file.</para>
|
|
<para>Configuration is read from an XML-format file. Examples
|
|
are shown for single and multi back-end cases.</para>
|
|
<note>
|
|
<itemizedlist>
|
|
<listitem>
|
|
<para>Configuration is read from an XML file. This
|
|
example shows the configuration for single
|
|
back-end and for multi-back-end cases.</para>
|
|
</listitem>
|
|
<listitem>
|
|
<para>It is not recommended to manage an HUS array
|
|
simultaneously from multiple OpenStack Block Storage instances
|
|
or servers. <footnote
|
|
xml:id="hds-one-instance-only">
|
|
<para>It is okay to manage multiple HUS
|
|
arrays by using multiple OpenStack Block Storage
|
|
instances (or servers).</para>
|
|
</footnote></para>
|
|
</listitem>
|
|
</itemizedlist>
|
|
</note>
|
|
<xi:include href="../../../common/tables/cinder-hds-hus.xml"/>
|
|
<simplesect>
|
|
<title>HUS setup</title>
|
|
<para>Before using iSCSI services, use the HUS UI to create an
|
|
iSCSI domain for each EVS providing iSCSI services.</para>
|
|
</simplesect>
|
|
<simplesect>
|
|
<title>Single back-end</title>
|
|
<para>In a single back-end deployment, only one OpenStack Block Storage
|
|
instance runs on the OpenStack Block Storage server and controls one
|
|
HUS array: this deployment requires these configuration
|
|
files:</para>
|
|
<orderedlist>
|
|
<listitem>
|
|
<para>Set the
|
|
<option>hds_cinder_config_file</option>
|
|
option in the
|
|
<filename>/etc/cinder/cinder.conf</filename>
|
|
file to use the HDS volume driver. This option
|
|
points to a configuration file.<footnote
|
|
xml:id="hds-no-fixed-location-1">
|
|
<para>The configuration file location
|
|
may differ.</para>
|
|
</footnote></para>
|
|
<programlisting language="ini">volume_driver = cinder.volume.drivers.hds.hds.HUSDriver
|
|
hds_cinder_config_file = /opt/hds/hus/cinder_hds_conf.xml</programlisting>
|
|
</listitem>
|
|
<listitem>
|
|
<para>Configure
|
|
<option>hds_cinder_config_file</option> at
|
|
the location specified previously. For
|
|
example,
|
|
<filename>/opt/hds/hus/cinder_hds_conf.xml</filename>:</para>
|
|
<programlisting language="xml"><?xml version="1.0" encoding="UTF-8" ?>
|
|
<config>
|
|
<mgmt_ip0>172.17.44.16</mgmt_ip0>
|
|
<mgmt_ip1>172.17.44.17</mgmt_ip1>
|
|
<hus_cmd>hus-cmd</hus_cmd>
|
|
<username>system</username>
|
|
<password>manager</password>
|
|
<svc_0>
|
|
<volume_type>default</volume_type>
|
|
<iscsi_ip>172.17.39.132</iscsi_ip>
|
|
<hdp>9</hdp>
|
|
</svc_0>
|
|
<snapshot>
|
|
<hdp>13</hdp>
|
|
</snapshot>
|
|
<lun_start>
|
|
3000
|
|
</lun_start>
|
|
<lun_end>
|
|
4000
|
|
</lun_end>
|
|
</config></programlisting>
|
|
</listitem>
|
|
</orderedlist>
|
|
</simplesect>
|
|
<simplesect>
|
|
<title>Multi back-end</title>
|
|
<para>In a multi back-end deployment, more than one OpenStack Block Storage
|
|
instance runs on the same server. In this example, two
|
|
HUS arrays are used, possibly providing different
|
|
storage performance:</para>
|
|
<procedure>
|
|
<step>
|
|
<para>Configure
|
|
<filename>/etc/cinder/cinder.conf</filename>:
|
|
the <literal>hus1</literal>
|
|
<option>hus2</option> configuration blocks are
|
|
created. Set the
|
|
<option>hds_cinder_config_file</option>
|
|
option to point to a unique configuration
|
|
file for each block. Set the
|
|
<option>volume_driver</option> option for
|
|
each back-end to
|
|
<literal>cinder.volume.drivers.hds.hds.HUSDriver</literal></para>
|
|
<programlisting language="ini">enabled_backends=hus1,hus2
|
|
|
|
[hus1]
|
|
volume_driver = cinder.volume.drivers.hds.hds.HUSDriver
|
|
hds_cinder_config_file = /opt/hds/hus/cinder_hus1_conf.xml
|
|
volume_backend_name=hus-1
|
|
|
|
[hus2]
|
|
volume_driver = cinder.volume.drivers.hds.hds.HUSDriver
|
|
hds_cinder_config_file = /opt/hds/hus/cinder_hus2_conf.xml
|
|
volume_backend_name=hus-2</programlisting>
|
|
</step>
|
|
<step>
|
|
<para>Configure
|
|
<filename>/opt/hds/hus/cinder_hus1_conf.xml</filename>:</para>
|
|
<programlisting language="xml"><?xml version="1.0" encoding="UTF-8" ?>
|
|
<config>
|
|
<mgmt_ip0>172.17.44.16</mgmt_ip0>
|
|
<mgmt_ip1>172.17.44.17</mgmt_ip1>
|
|
<hus_cmd>hus-cmd</hus_cmd>
|
|
<username>system</username>
|
|
<password>manager</password>
|
|
<svc_0>
|
|
<volume_type>regular</volume_type>
|
|
<iscsi_ip>172.17.39.132</iscsi_ip>
|
|
<hdp>9</hdp>
|
|
</svc_0>
|
|
<snapshot>
|
|
<hdp>13</hdp>
|
|
</snapshot>
|
|
<lun_start>
|
|
3000
|
|
</lun_start>
|
|
<lun_end>
|
|
4000
|
|
</lun_end>
|
|
</config></programlisting>
|
|
</step>
|
|
<step>
|
|
<para>Configure the
|
|
<filename>/opt/hds/hus/cinder_hus2_conf.xml</filename>
|
|
file:</para>
|
|
<programlisting language="xml"><?xml version="1.0" encoding="UTF-8" ?>
|
|
<config>
|
|
<mgmt_ip0>172.17.44.20</mgmt_ip0>
|
|
<mgmt_ip1>172.17.44.21</mgmt_ip1>
|
|
<hus_cmd>hus-cmd</hus_cmd>
|
|
<username>system</username>
|
|
<password>manager</password>
|
|
<svc_0>
|
|
<volume_type>platinum</volume_type>
|
|
<iscsi_ip>172.17.30.130</iscsi_ip>
|
|
<hdp>2</hdp>
|
|
</svc_0>
|
|
<snapshot>
|
|
<hdp>3</hdp>
|
|
</snapshot>
|
|
<lun_start>
|
|
2000
|
|
</lun_start>
|
|
<lun_end>
|
|
3000
|
|
</lun_end>
|
|
</config></programlisting>
|
|
</step>
|
|
</procedure>
|
|
</simplesect>
|
|
<simplesect>
|
|
<title>Type extra specs: <option>volume_backend</option>
|
|
and volume type</title>
|
|
<para>If you use volume types, you must configure them in
|
|
the configuration file and set the
|
|
<option>volume_backend_name</option> option to the
|
|
appropriate back-end. In the previous multi back-end
|
|
example, the <literal>platinum</literal> volume type
|
|
is served by hus-2, and the <literal>regular</literal>
|
|
volume type is served by hus-1.</para>
|
|
<programlisting>cinder type-key regular set volume_backend_name=hus-1
|
|
cinder type-key platinum set volume_backend_name=hus-2</programlisting>
|
|
</simplesect>
|
|
<simplesect>
|
|
<title>Non differentiated deployment of HUS arrays</title>
|
|
<para>You can deploy multiple OpenStack Block Storage instances that each
|
|
control a separate HUS array. Each instance has no
|
|
volume type associated with it. The OpenStack Block Storage filtering
|
|
algorithm selects the HUS array with the largest
|
|
available free space. In each configuration file, you
|
|
must define the <literal>default</literal>
|
|
<option>volume_type</option> in the service
|
|
labels.</para>
|
|
</simplesect>
|
|
</section>
|
|
<section xml:id="hds-options">
|
|
<title>HDS iSCSI volume driver configuration options</title>
|
|
<para>These details apply to the XML format configuration file
|
|
that is read by HDS volume driver. These differentiated
|
|
service labels are predefined: <literal>svc_0</literal>,
|
|
<literal>svc_1</literal>, <literal>svc_2</literal>,
|
|
and <literal>svc_3</literal><footnote
|
|
xml:id="hds-no-weight">
|
|
<para>Each of
|
|
these four labels has no relative precedence or weight.</para>
|
|
</footnote>. Each respective service label associates with
|
|
these parameters and tags:</para>
|
|
<orderedlist>
|
|
<listitem>
|
|
<para><option>volume-types</option>: A create_volume
|
|
call with a certain volume type shall be matched
|
|
up with this tag. <literal>default</literal> is
|
|
special in that any service associated with this
|
|
type is used to create volume when no other labels
|
|
match. Other labels are case sensitive and should
|
|
exactly match. If no configured volume_types match
|
|
the incoming requested type, an error occurs in
|
|
volume creation.</para>
|
|
</listitem>
|
|
<listitem>
|
|
<para><option>HDP</option>, the pool ID associated
|
|
with the service.</para>
|
|
</listitem>
|
|
<listitem>
|
|
<para>An iSCSI port dedicated to the service.</para>
|
|
</listitem>
|
|
</orderedlist>
|
|
<para>Typically a OpenStack Block Storage volume instance has only one such
|
|
service label. For example, any <literal>svc_0</literal>,
|
|
<literal>svc_1</literal>, <literal>svc_2</literal>, or
|
|
<literal>svc_3</literal> can be associated with it.
|
|
But any mix of these service labels can be used in the
|
|
same instance <footnote xml:id="hds-stats-all-hdp">
|
|
<para>The get_volume_stats() always provides the available
|
|
capacity based on the combined sum of all the HDPs
|
|
that are used in these services labels.</para>
|
|
</footnote>.</para>
|
|
<table rules="all">
|
|
<caption>Configuration options</caption>
|
|
<col width="25%"/>
|
|
<col width="10%"/>
|
|
<col width="15%"/>
|
|
<col width="50%"/>
|
|
<thead>
|
|
<tr>
|
|
<td>Option</td>
|
|
<td>Type</td>
|
|
<td>Default</td>
|
|
<td>Description</td>
|
|
</tr>
|
|
</thead>
|
|
<tbody>
|
|
<tr>
|
|
<td><para><option>mgmt_ip0</option></para>
|
|
</td>
|
|
<td><para>Required</para></td>
|
|
<td><para/></td>
|
|
<td><para>Management Port 0 IP address</para>
|
|
</td>
|
|
</tr>
|
|
<tr>
|
|
<td><para><option>mgmt_ip1</option></para>
|
|
</td>
|
|
<td><para>Required</para></td>
|
|
<td><para/></td>
|
|
<td><para>Management Port 1 IP address</para>
|
|
</td>
|
|
</tr>
|
|
<tr>
|
|
<td><para><option>hus_cmd</option></para>
|
|
</td>
|
|
<td><para>Optional</para></td>
|
|
<td><para/></td>
|
|
<td>
|
|
<para><option>hus_cmd</option> is the command used to
|
|
communicate with the HUS array. If it is not
|
|
set, the default value is
|
|
<command>hus-cmd</command>.</para>
|
|
</td>
|
|
</tr>
|
|
<tr>
|
|
<td><para><option>username</option></para>
|
|
</td>
|
|
<td><para>Optional</para></td>
|
|
<td><para/></td>
|
|
<td>
|
|
<para>Username is required only if secure mode
|
|
is used</para>
|
|
</td>
|
|
</tr>
|
|
<tr>
|
|
<td><para><option>password</option></para>
|
|
</td>
|
|
<td><para>Optional</para></td>
|
|
<td><para/></td>
|
|
<td>
|
|
<para>Password is required only if secure mode
|
|
is used</para>
|
|
</td>
|
|
</tr>
|
|
<tr>
|
|
<td>
|
|
<para><option>svc_0, svc_1, svc_2, svc_3
|
|
</option></para>
|
|
</td>
|
|
<td><para>Optional</para></td>
|
|
<td><para>(at least one label has to be
|
|
defined)</para></td>
|
|
<td>
|
|
<para>Service labels: these four predefined
|
|
names help four different sets of
|
|
configuration options -- each can specify
|
|
iSCSI port address, HDP and a unique
|
|
volume type.</para>
|
|
</td>
|
|
</tr>
|
|
<tr>
|
|
<td>
|
|
<para><option>snapshot</option></para>
|
|
</td>
|
|
<td><para>Required</para></td>
|
|
<td><para/></td>
|
|
<td>
|
|
<para>A service label which helps specify
|
|
configuration for snapshots, such as,
|
|
HDP.</para>
|
|
</td>
|
|
</tr>
|
|
<tr>
|
|
<td>
|
|
<para><option>volume_type</option></para>
|
|
</td>
|
|
<td><para>Required</para></td>
|
|
<td><para/></td>
|
|
<td>
|
|
<para><option>volume_type</option> tag is used
|
|
to match volume type.
|
|
<literal>Default</literal> meets any
|
|
type of <option>volume_type</option>, or
|
|
if it is not specified. Any other
|
|
volume_type is selected if exactly matched
|
|
during
|
|
<literal>create_volume</literal>.</para>
|
|
</td>
|
|
</tr>
|
|
<tr>
|
|
<td>
|
|
<para><option>iscsi_ip</option></para>
|
|
</td>
|
|
<td><para>Required</para></td>
|
|
<td><para/></td>
|
|
<td>
|
|
<para>iSCSI port IP address where volume
|
|
attaches for this volume type.</para>
|
|
</td>
|
|
</tr>
|
|
<tr>
|
|
<td>
|
|
<para><option>hdp</option></para>
|
|
</td>
|
|
<td><para>Required</para></td>
|
|
<td><para/></td>
|
|
<td>
|
|
<para>HDP, the pool number where volume, or
|
|
snapshot should be created.</para>
|
|
</td>
|
|
</tr>
|
|
<tr>
|
|
<td>
|
|
<para><option>lun_start</option></para>
|
|
</td>
|
|
<td><para>Optional</para></td>
|
|
<td><para>0</para></td>
|
|
<td>
|
|
<para>LUN allocation starts at this
|
|
number.</para>
|
|
</td>
|
|
</tr>
|
|
<tr>
|
|
<td>
|
|
<para><option>lun_end</option></para>
|
|
</td>
|
|
<td><para>Optional</para></td>
|
|
<td><para>4096</para></td>
|
|
<td>
|
|
<para>LUN allocation is up to, but not
|
|
including, this number.</para>
|
|
</td>
|
|
</tr>
|
|
</tbody>
|
|
</table>
|
|
</section>
|
|
</section>
|