1f4f541e92
This patch fixes the install guide based on real testing under ubuntu Currently verified to the end of "Enabling KVM on the Compute node" Change-Id: I2832a5cbb66e3b6602f9b6f4f9b2ddbcc897cdcf
122 lines
7.0 KiB
XML
122 lines
7.0 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"
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version="5.0"
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xml:id="nova-compute">
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<title>Configuring a Compute Node</title>
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<para>After configuring the Compute Services on the controller node, configure a second system to
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be a Compute node. The Compute node receives requests from the controller node and hosts virtual
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machine instances. You can run all services on a single node, but this guide uses separate
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systems. This makes it easy to scale horizontally by adding additional Compute nodes following
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the instructions in this section.</para>
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<para>The Compute Service relies on a hypervisor to run virtual machine
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instances. OpenStack can use various hypervisors, but this guide uses
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KVM.</para>
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<procedure>
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<title>Configure a Compute Node</title>
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<step><para>Begin by configuring the system using the instructions in
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<xref linkend="ch_basics"/>. Note the following differences from the
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controller node:</para>
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<itemizedlist>
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<listitem>
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<para>Use different IP addresses when configuring <filename>eth0</filename>
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and <filename>eth1</filename>. This guide uses <literal>192.168.0.11</literal> for
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the internal network and <literal>10.0.0.11</literal> for the external network.</para>
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</listitem>
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<listitem>
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<para>Set the hostname to <literal>compute1</literal>. Ensure that the
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IP addresses and hostnames for both nodes are listed in the
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<filename>/etc/hosts</filename> file on each system.</para>
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</listitem>
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<listitem>
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<para>Follow the instructions in
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<xref linkend="basics-ntp"/> to synchronize from the controller node.</para>
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</listitem>
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<listitem>
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<para>Install the MySQL client libraries. You do not need to install the MySQL database
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server or start the MySQL service.</para>
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</listitem>
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</itemizedlist>
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</step>
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<step><para>After configuring the operating system, install the appropriate
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packages for the compute service.</para>
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<screen os="ubuntu;debian"><prompt>#</prompt> <userinput>apt-get install nova-compute-kvm</userinput></screen>
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<screen os="centos;rhel;fedora"><prompt>#</prompt> <userinput>yum install openstack-nova-compute</userinput></screen>
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<screen os="opensuse"><prompt>#</prompt> <userinput>zypper install openstack-nova-compute kvm</userinput></screen>
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</step>
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<step><para>Either copy the file <filename>/etc/nova/nova.conf</filename> from the
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<replaceable>controller</replaceable> node, or run the same configuration commands.</para>
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<screen os="fedora;rhel;centos;opensuse"><prompt>#</prompt> <userinput>openstack-config --set /etc/nova/nova.conf \
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database connection mysql://nova:<replaceable>NOVA_DBPASS</replaceable>@controller/nova</userinput>
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<prompt>#</prompt> <userinput>openstack-config --set /etc/nova/nova.conf DEFAULT auth_strategy keystone</userinput>
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<prompt>#</prompt> <userinput>openstack-config --set /etc/nova/nova.conf DEFAULT auth_host <replaceable>controller</replaceable></userinput>
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<prompt>#</prompt> <userinput>openstack-config --set /etc/nova/nova.conf DEFAULT admin_user nova</userinput>
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<prompt>#</prompt> <userinput>openstack-config --set /etc/nova/nova.conf DEFAULT admin_tenant_name service</userinput>
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<prompt>#</prompt> <userinput>openstack-config --set /etc/nova/nova.conf DEFAULT admin_password <replaceable>NOVA_PASS</replaceable></userinput></screen>
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<para os="ubuntu;debian">Edit <filename>/etc/nova/nova.conf</filename> and add to the <literal>[DEFAULT]</literal> section.</para>
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<programlisting os="ubuntu;debian" language="ini">
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...
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[DEFAULT]
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...
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auth_strategy=keystone
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auth_host=<replaceable>controller</replaceable>
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admin_user=nova
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admin_tenant_name=service
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admin_password=<replaceable>NOVA_PASS</replaceable>
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</programlisting>
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<screen os="fedora;rhel;centos"><prompt>#</prompt> <userinput>openstack-config --set /etc/nova/nova.conf \
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DEFAULT rpc_backend nova.openstack.common.rpc.impl_qpid</userinput>
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<prompt>#</prompt> <userinput>openstack-config --set /etc/nova/nova.conf DEFAULT qpid_hostname <replaceable>controller</replaceable></userinput></screen>
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<para os="ubuntu;debian">
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Configure the Compute Service to use the RabbitMQ
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message broker by setting the following configuration keys. They are found in
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the <literal>DEFAULT</literal> configuration group of the
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<filename>/etc/nova/nova.conf</filename> file.</para>
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<screen os="ubuntu;debian">rpc_backend = nova.rpc.impl_kombu
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rabbit_host = controller</screen>
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</step>
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<step><para>Set the configuration keys <literal>my_ip</literal>,
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<literal>vncserver_listen</literal>, and
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<literal>vncserver_proxyclient_address</literal> to the IP address of the
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compute node on the internal network.</para>
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<screen os="fedora;rhel;centos;opensuse"><prompt>#</prompt> <userinput>openstack-config --set /etc/nova/nova.conf DEFAULT my_ip 192.168.0.11</userinput>
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<prompt>#</prompt> <userinput>openstack-config --set /etc/nova/nova.conf DEFAULT vncserver_listen 192.168.0.11</userinput>
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<prompt>#</prompt> <userinput>openstack-config --set /etc/nova/nova.conf DEFAULT vncserver_proxyclient_address 192.168.0.11</userinput></screen>
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<para os="ubuntu;debian">Edit <filename>/etc/nova/nova.conf</filename> and add to the <literal>[DEFAULT]</literal> section.</para>
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<programlisting os="ubuntu;debian" language="ini">
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[DEFAULT]
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...
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my_ip=192.168.0.11
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vncserver_listen=192.168.0.11
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vncserver_proxyclient_address=192.168.0.11
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</programlisting>
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</step>
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<step><para>Copy the file <filename>/etc/nova/api-paste.ini</filename> from the
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<replaceable>controller</replaceable> node, or edit the file to add the credentials in the
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<literal>[filter:authtoken]</literal> section.</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=controller
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admin_user=nova
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admin_tenant_name=service
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admin_password=<replaceable>NOVA_PASS</replaceable>
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</programlisting>
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<note os="fedora;rhel;centos;opensuse"><para>Ensure that <filename>api_paste_config=/etc/nova/api-paste.ini</filename> is set in
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<filename>/etc/nova/nova.conf</filename>.</para></note>
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</step>
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<step><para>Start the Compute service and configure it to start when the system boots.</para>
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<screen os="ubuntu;debian"><prompt>#</prompt> <userinput>service nova-compute start</userinput></screen>
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<screen os="centos;rhel;fedora"><prompt>#</prompt> <userinput>service openstack-nova-compute start</userinput>
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<prompt>#</prompt> <userinput>chkconfig openstack-nova-compute on</userinput></screen>
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<screen os="opensuse"><prompt>#</prompt> <userinput>systemctl start openstack-nova-compute</userinput>
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<prompt>#</prompt> <userinput>systemctl enable openstack-nova-compute</userinput></screen></step>
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</procedure>
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</section>
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