openstack/openstack-manuals
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openstack-manuals/doc/admin-guide/source/cli-nova-specify-host.rst
Anne Gentle 9843767b21 [admin-guide] Rename RST files to use hyphen instead of underbar 
Change-Id: I40999b1eb923fc3796cbb6d982e03d39cdf8c720
Implements: blueprint consistency-file-rename
2016-08-06 09:51:57 -05:00

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Select hosts where instances are launched

With the appropriate permissions, you can select which host instances are launched on and which roles can boot instances on this host.

  1. To select the host where instances are launched, use the --availability-zone ZONE:HOST parameter on the openstack server create command.

    For example:

    $ openstack server create --image IMAGE --flavor m1.tiny \
  --key-name KEY --availability-zone ZONE:HOST \
  --nic net-id=UUID SERVER

  2. To specify which roles can launch an instance on a specified host, enable the create:forced_host option in the policy.json file. By default, this option is enabled for only the admin role.

  3. To view the list of valid compute hosts, use the openstack hypervisor list command.

    $ openstack hypervisor list
+----+---------------------+
| ID | Hypervisor Hostname |
+----+---------------------+
|  1 | server2             |
|  2 | server3             |
|  3 | server4             |
+----+---------------------+