75 lines
4.5 KiB
XML
75 lines
4.5 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"
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version="5.0"
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xml:id="nova-network">
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<title>Enabling Networking</title>
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<para>Configuring Networking can be one of the most bewildering experiences
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you will encounter when working with OpenStack. To assist in this we have
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chosen the simplest production-ready configuration for this guide: the legacy
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networking in OpenStack Compute, with a flat network, that takes care of DHCP
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and is made highly available by splitting across multiple hosts.</para>
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<note><para>If you require the full software-defined networking stack, see <link
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linkend="ch_neutron">Using Neutron Networking</link>.</para></note>
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<procedure>
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<title>Enable networking on a compute node</title>
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<step><para>After performing initial configuration of the compute node,
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install the appropriate packages for compute networking.</para>
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<screen os="ubuntu;debian"><prompt>#</prompt> <userinput>apt-get install nova-network</userinput></screen>
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<screen os="centos;rhel;fedora"><prompt>#</prompt> <userinput>yum install openstack-nova-network</userinput></screen>
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<screen os="opensuse;sles"><prompt>#</prompt> <userinput>zypper install openstack-nova-network</userinput></screen>
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</step>
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<step>
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<para>First, set the configuration options needed in <filename>nova.conf</filename> for the chosen networking mode.</para>
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<screen os="fedora;rhel;centos;opensuse;sles"><prompt>#</prompt> <userinput>openstack-config --set /etc/nova/nova.conf DEFAULT \
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network_manager nova.network.manager.FlatDHCPManager</userinput>
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<prompt>#</prompt> <userinput>openstack-config --set /etc/nova/nova.conf DEFAULT \
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firewall_driver nova.virt.libvirt.firewall.IptablesFirewallDriver</userinput>
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<prompt>#</prompt> <userinput>openstack-config --set /etc/nova/nova.conf DEFAULT network_size 254</userinput>
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<prompt>#</prompt> <userinput>openstack-config --set /etc/nova/nova.conf DEFAULT routing_source_ip ADDRESS</userinput>
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<prompt>#</prompt> <userinput>openstack-config --set /etc/nova/nova.conf DEFAULT allow_same_net_traffic False</userinput>
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<prompt>#</prompt> <userinput>openstack-config --set /etc/nova/nova.conf DEFAULT multi_host True</userinput>
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<prompt>#</prompt> <userinput>openstack-config --set /etc/nova/nova.conf DEFAULT send_arp_for_ha True</userinput>
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<prompt>#</prompt> <userinput>openstack-config --set /etc/nova/nova.conf DEFAULT share_dhcp_address True</userinput>
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<prompt>#</prompt> <userinput>openstack-config --set /etc/nova/nova.conf DEFAULT force_dhcp_release True</userinput>
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<prompt>#</prompt> <userinput>openstack-config --set /etc/nova/nova.conf DEFAULT flat_interface eth1</userinput>
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<prompt>#</prompt> <userinput>openstack-config --set /etc/nova/nova.conf DEFAULT flat_network_bridge br100</userinput>
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<prompt>#</prompt> <userinput>openstack-config --set /etc/nova/nova.conf DEFAULT public_interface eth0</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">[DEFAULT]
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...
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network_manager=nova.network.manager.FlatDHCPManager
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firewall_driver=nova.virt.libvirt.firewall.IptablesFirewallDriver
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network_size=254
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allow_same_net_traffic=False
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multi_host=True
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send_arp_for_ha=True
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share_dhcp_address=True
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force_dhcp_release=True
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flat_network_bridge=br100
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flat_interface=eth1
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public_interface=eth0
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</programlisting>
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</step>
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<step>
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<para os="ubuntu;debian">Restart the network service.</para>
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<screen os="ubuntu;debian"><prompt>#</prompt> <userinput>service nova-network restart</userinput></screen>
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<para os="fedora;rhel;centos;opensuse;sles">Start the network service and configure it to start when the system boots.</para>
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<screen os="centos;rhel;fedora;opensuse;sles"><prompt>#</prompt> <userinput>service openstack-nova-network restart</userinput>
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<prompt>#</prompt> <userinput>chkconfig openstack-nova-network on</userinput></screen>
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</step>
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</procedure>
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<para>Finally, you have to create a network that virtual machines can use. You
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only need to do this once for the entire installation, not for each compute node.
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Run the <command>nova network-create</command> command anywhere your admin user
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credentials are loaded.</para>
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<screen><prompt>#</prompt> <userinput>source keystonerc</userinput></screen>
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<screen><prompt>#</prompt> <userinput>nova network-create vmnet --fixed-range-v4=10.0.0.0/24 \
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--bridge-interface=br100 --multi-host=T</userinput></screen>
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</section>
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