94 lines
3.7 KiB
ReStructuredText
94 lines
3.7 KiB
ReStructuredText
Host networking
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~~~~~~~~~~~~~~~
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After installing the operating system on each node for the architecture
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that you choose to deploy, you must configure the network interfaces. We
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recommend that you disable any automated network management tools and
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manually edit the appropriate configuration files for your distribution.
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For more information on how to configure networking on your
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distribution, see the `documentation
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<https://access.redhat.com/documentation/en-US/Red_Hat_Enterprise_Linux/7/html/Networking_Guide/sec-Using_the_Command_Line_Interface.html>`__ .
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All nodes require Internet access for administrative purposes such as package
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installation, security updates, :term:`DNS <Domain Name System (DNS)>`, and
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:term:`NTP <Network Time Protocol (NTP)>`. In most cases, nodes should obtain
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Internet access through the management network interface.
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To highlight the importance of network separation, the example architectures
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use `private address space <https://tools.ietf.org/html/rfc1918>`__ for the
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management network and assume that the physical network infrastructure
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provides Internet access via :term:`NAT <Network Address Translation (NAT)>`
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or other methods. The example architectures use routable IP address space for
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the provider (external) network and assume that the physical network
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infrastructure provides direct Internet access.
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In the provider networks architecture, all instances attach directly
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to the provider network. In the self-service (private) networks architecture,
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instances can attach to a self-service or provider network. Self-service
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networks can reside entirely within OpenStack or provide some level of external
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network access using :term:`NAT <Network Address Translation (NAT)>` through
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the provider network.
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.. _figure-networklayout:
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.. figure:: figures/networklayout.png
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:alt: Network layout
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The example architectures assume use of the following networks:
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* Management on 10.0.0.0/24 with gateway 10.0.0.1
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This network requires a gateway to provide Internet access to all
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nodes for administrative purposes such as package installation,
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security updates, :term:`DNS <Domain Name System (DNS)>`, and
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:term:`NTP <Network Time Protocol (NTP)>`.
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* Provider on 203.0.113.0/24 with gateway 203.0.113.1
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This network requires a gateway to provide Internet access to
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instances in your OpenStack environment.
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You can modify these ranges and gateways to work with your particular
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network infrastructure.
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Network interface names vary by distribution. Traditionally,
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interfaces use ``eth`` followed by a sequential number. To cover all
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variations, this guide refers to the first interface as the
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interface with the lowest number and the second interface as the
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interface with the highest number.
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Unless you intend to use the exact configuration provided in this
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example architecture, you must modify the networks in this procedure to
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match your environment. Each node must resolve the other nodes by
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name in addition to IP address. For example, the ``controller`` name must
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resolve to ``10.0.0.11``, the IP address of the management interface on
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the controller node.
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.. warning::
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Reconfiguring network interfaces will interrupt network
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connectivity. We recommend using a local terminal session for these
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procedures.
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.. note::
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Your distribution enables a restrictive :term:`firewall` by
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default. During the installation process, certain steps will fail
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unless you alter or disable the firewall. For more information
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about securing your environment, refer to the `OpenStack Security
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Guide <https://docs.openstack.org/security-guide/>`_.
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.. toctree::
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:maxdepth: 1
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environment-networking-controller.rst
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environment-networking-compute.rst
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environment-networking-storage-cinder.rst
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environment-networking-verify.rst
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