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Tullis, Michael L
62 lines
2.1 KiB
ReStructuredText
62 lines
2.1 KiB
ReStructuredText
.. _openstack_env_inventory_file:
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The "hosts" file
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################
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The :file:`hosts` file is an inventory file where you specify, via
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``ini`` format, the roles your machine plays.
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The :file:`hosts` file can be structured with different groups, where each
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group plays a specific role in your environment and network mapping.
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Consider the following example::
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[openstack_identity]
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192.168.50.13
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Here, the role ``[openstack_identity]`` syntax defines the group, and
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``192.168.50.13`` specifies the machine(s) that possess that role. You
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may define multiple machines in the same group; this is a standard
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configuration for role ``[openstack_compute]`` nodes::
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[openstack_compute]
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192.168.50.16
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192.168.50.17
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Inventory file groups
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---------------------
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Below you will find the description of each group in the `hosts` file.
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.. csv-table:: "Inventory File Groups"
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:header: "Group", "Components", "Comments"
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:widths: 40, 40, 300
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"[dbservers]", "MariaDB", ""
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"[messaging_servers]", "RabbitMQ", ""
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"[openstack_identity]", "Keystone, Horizon", ""
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"[openstack_image]", "Glance", ""
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"[openstack_compute_controller]", "Nova", ""
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"[openstack_compute]", "Nova", "Accepts multiple entries to have multiple compute nodes. You can add more entries and re-run the installer to add them to your environment."
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"[openstack_networking]", "Neutron", ""
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"[openstack_orchestration]", "Heat", ""
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"[openstack_object_storage_controller]", "Swift", "The Swift storage controller. It runs the swift proxy server and the memcache server"
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"[openstack_object_storage]", "Swift", "The Swift Storage nodes. Accepts multiple entries to have multiple storage nodes"
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Important notes
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---------------
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* To omit any role, do not add an entry under its group section.
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* To create an ``All In One`` scenario, specify the same machine name or IPv4
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Address under all of the groups.
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For further reference, check out the `Ansible`_ documentation.
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**Back to Configuration Section** :ref:`configure_openstack_environment`
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.. _Ansible: http://docs.ansible.com/ansible/intro_inventory.html
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