Stephen Finucane cadd25e9bc doc: Add additional content to admin guide

Import the following documents from the admin guide [1]:

- cli-manage-flavors.rst
- cli-nova-evacuate.rst
- cli-nova-manage-projects-security.rst
- cli-nova-manage-services.rst
- cli-nova-numa-libvirt.rst
- cli-nova-specify-host.rst
- cli-set-quotas.rst
- cli-set-compute-quotas.rst
- cli-os-migrate.rst
- cli-os-migrate-cfg-ssh.rst
- ts-no-emulator-x86-64.rst
- ts-multipath-warn.rst
- ts-failed-connect-vol-FC-SAN.rst
- ts-failed-attach-vol-no-sysfsutils.rst
- ts-failed-attach-vol-after-detach.rst
- ts-vol-attach-miss-sg-scan.rst

These were missed in the original import [2]. All 'ts-' files are merged
into a single 'support-compute' document, which is already in-tree.

[1] https://github.com/openstack/openstack-manuals/tree/stable/ocata/doc/admin-guide/source
[2] https://review.openstack.org/#/c/477497/

Change-Id: Ifa0039e270e54ea2fb58ab18ce6724e5e8e061a1
Closes-Bug: #1708666

2017-08-08 14:04:14 +01:00

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Evacuate instances

If a hardware malfunction or other error causes a cloud compute node to fail, you can evacuate instances to make them available again. You can optionally include the target host on the nova evacuate command. If you omit the host, the scheduler chooses the target host.

To preserve user data on the server disk, configure shared storage on the target host. When you evacuate the instance, Compute detects whether shared storage is available on the target host. Also, you must validate that the current VM host is not operational. Otherwise, the evacuation fails.

To find a host for the evacuated instance, list all hosts:
```
$ openstack host list
```
Evacuate the instance. You can use the --password PWD option to pass the instance password to the command. If you do not specify a password, the command generates and prints one after it finishes successfully. The following command evacuates a server from a failed host to HOST_B.
```
$ nova evacuate EVACUATED_SERVER_NAME HOST_B
```
The command rebuilds the instance from the original image or volume and returns a password. The command preserves the original configuration, which includes the instance ID, name, uid, IP address, and so on.
```
+-----------+--------------+
| Property  |    Value     |
+-----------+--------------+
| adminPass | kRAJpErnT4xZ |
+-----------+--------------+
```
To preserve the user disk data on the evacuated server, deploy Compute with a shared file system. To configure your system, see section_configuring-compute-migrations. The following example does not change the password.
```
$ nova evacuate EVACUATED_SERVER_NAME HOST_B --on-shared-storage
```

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Evacuate instances

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