XenAPI: Cleanup configuration section
* Remove references to Host Internal Management Network, as they are confusing. * Remove Xen+libvirt instructions. * Remove host aggregate related notes. Change-Id: I321bcfce193d63e5768327359ecf9991a4b407f2
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Mate Lakat
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@ -5,95 +5,77 @@
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xml:id="section_compute-configure-xen">
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<title>Xen configuration reference</title>
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<para>
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The following section discusses some commonly changed options in
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XenServer. The table below provides a complete reference of all
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configuration options available for configuring Xen with OpenStack.
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The following section discusses some commonly changed options when
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using the XenAPI driver. The table below provides a complete reference
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of all configuration options available for configuring XAPI with
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OpenStack.
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</para>
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<para>
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The recommended way to use Xen with OpenStack is through the XenAPI
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The recommended way to use XAPI with OpenStack is through the XenAPI
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driver. To enable the XenAPI driver, add the following configuration
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options <filename>/etc/nova/nova.conf</filename> and restart the
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<systemitem class="service">nova-compute</systemitem> service:
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options to <filename>/etc/nova/nova.conf</filename> and restart
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<systemitem class="service">OpenStack Compute</systemitem>:
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</para>
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<programlisting language="ini">compute_driver = xenapi.XenAPIDriver
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xenapi_connection_url = http://your_xenapi_management_ip_address
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xenapi_connection_username = root
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xenapi_connection_password = your_password</programlisting>
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[xenserver]
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connection_url = http://<replaceable>your_xenapi_management_ip_address</replaceable>
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connection_username = root
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connection_password = <replaceable>your_password</replaceable></programlisting>
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<para>
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These connection details are used by the OpenStack Compute service to
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These connection details are used by OpenStack Compute service to
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contact your hypervisor and are the same details you use to connect
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XenCenter, the XenServer management console, to your XenServer or XCP
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box.
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XenCenter, the XenServer management console, to your XenServer node.
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</para>
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<note>
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<para>
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The <literal>xenapi_connection_url</literal> is generally the
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management network IP address of the XenServer. Though it is
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possible to use the internal network IP Address (169.250.0.1) to
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contact XenAPI, this does not allow live migration between hosts.
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Other functionalities such as host aggregates, do not work.
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The <literal>connection_url</literal> is generally the
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management network IP address of the XenServer.
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</para>
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</note>
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<para>
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It is possible to manage Xen using libvirt, though this is not
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well-tested or supported. To experiment using Xen through libvirt add
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the following configuration options
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<filename>/etc/nova/nova.conf</filename>:
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<programlisting language="ini">compute_driver = libvirt.LibvirtDriver
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[libvirt]
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virt_type = xen</programlisting>
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</para>
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<section xml:id="xen-agent">
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<title>Agent</title>
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<para>
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If you don't have the guest agent on your VMs, it takes a long time
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for nova to decide the VM has successfully started. Generally a
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large timeout is required for Windows instances, but you may want
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to tweak <literal>agent_version_timeout</literal>.
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The agent is a piece of software that runs on the instances, and
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communicates with OpenStack. In case of the XenAPI driver, the
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agent communicates with OpenStack through XenStore (see
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<link xlink:href="http://wiki.xen.org/wiki/XenStore">the Xen Wiki</link>
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for more information on XenStore).
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</para>
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</section>
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<section xml:id="xen-firewall">
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<title>Firewall</title>
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<para>
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If using nova-network, iptables is supported:
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<programlisting language="ini">firewall_driver = nova.virt.firewall.IptablesFirewallDriver</programlisting>
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Alternately, doing the isolation in Dom0:
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<programlisting language="ini">firewall_driver = nova.virt.xenapi.firewall.Dom0IptablesFirewallDriver</programlisting>
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If you don't have the guest agent on your VMs, it takes a long time
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for OpenStack Compute to detect that the VM has successfully
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started. Generally a large timeout is required for Windows
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instances, but you may want to adjust:
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<literal>agent_version_timeout</literal> within the
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<literal>[xenserver]</literal> section.
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</para>
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</section>
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<section xml:id="xen-vnc">
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<title>VNC proxy address</title>
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<para>
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Assuming you are talking to XenAPI through the host local
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management network, and XenServer is on the address: 169.254.0.1,
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you can use the following:
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<literal>vncserver_proxyclient_address=169.254.0.1</literal>
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Assuming you are talking to XAPI through a management network, and
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XenServer is on the address: 10.10.1.34 specify the same address
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for the vnc proxy address:
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<literal>vncserver_proxyclient_address=<replaceable>10.10.1.34</replaceable></literal>
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</para>
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</section>
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<section xml:id="xen-storage">
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<title>Storage</title>
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<para>
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You can specify which Storage Repository to use with nova by
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looking at the following flag. The default is to use the
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local-storage setup by the default installer:
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editing the following flag. To use the local-storage setup by the
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default installer:
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<programlisting language="ini">sr_matching_filter = "other-config:i18n-key=local-storage"</programlisting>
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Another good alternative is to use the "default" storage (for
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example if you have attached NFS or any other shared storage):
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Another alternative is to use the "default" storage (for example if
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you have attached NFS or any other shared storage):
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<programlisting language="ini">sr_matching_filter = "default-sr:true"</programlisting>
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<note>
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<para>
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To use a XenServer pool, you must create the pool by using
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the Host Aggregates feature.
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</para>
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</note>
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</para>
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</section>
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<section xml:id="xen-config-reference-table">
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<title>Xen configuration reference</title>
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<title>XenAPI configuration reference</title>
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<para>
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To customize the Xen driver, use the configuration option settings
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documented in <xref linkend="config_table_nova_xen"/>.
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To customize the XenAPI driver, use the configuration option
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settings documented in <xref linkend="config_table_nova_xen"/>.
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</para>
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</section>
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</section>
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