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From RFC2606: To reduce the likelihood of conflict and confusion, a few top level domain names are reserved for use in private testing, as examples in documentation, and the like. Currently the documentation contains URLs that point to mycloud.com, which is registered and not affiliated with OpenStack. It's better to use example.com which exists for this purpose. Change-Id: I7ebd9b2c0d650f15e5924798cc54611d47961f8f
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About The Rescue Extension
The rescue extension lets you put a server into a "rescue" status when the virtual instance will be replaced with a "rescue" image and have its existing drive attached as a second disk so that a root user can log in and troubleshoot problems with the virtual server.
To put a server into "rescue" state, you do not have to be an administrator. The only requirement is that the base image used to build your instance must still be available.
To obtain current information the extensions available to you, issue an EXTENSION query on the OpenStack system where it is installed, such as http://example.com/v1.1/tenant/extensions.
Rescue Extension Overview
- Name
-
Rescue
- Namespace
- Alias
-
OPS-RES
- Contact
-
Josh Kearney <josh@jk0.org>
- Status
-
Alpha
- Extension Version
-
v1.0 (2011-08-18)
- Dependencies
-
Compute API 1.1
- Doc Link (PDF)
- Doc Link (WADL)
- Short Description
-
This extension enables rescue capabilities for OpenStack Compute servers so that virtual instances running in the cloud may be put in a rescue status.
Sample Query Responses
As shown below, responses to an EXTENSION query in XML or JSON provide basic information about the extension.
Extension Query Response: XML:: N/A
Extension Query Response: JSON:
{"extensions": [{"updated": "2011-08-18T00:00:00+00:00", "name": "Rescue", "links": [], "namespace": "http://docs.openstack.org/ext/rescue/api/v1.1", "alias": "os-rescue", "description": "Instance rescue mode"}]}Document Change History
| Revision Date | Summary of Changes |
| 2011-09-16 | Initial draft |
Summary of Changes
This extension to the OpenStack Compute API enables rescue of running instances.
To support these new actions, the extension also issues new states.
New Actions
rescue unrescue
New Faults
None
New Headers
None
New Resources
None
New States
RESCUING UNRESCUING
Changes to the Cloud Servers Specification
A new action added to the 4.3 Server Actions section.
Rescue Server
| Verb | URI |
| POST | /servers/id/rescue |
Normal Response Code(s): 202
Error Response Code(s): computeFault (400, 500, …), serviceUnavailable (503), unauthorized (401), forbidden (403), badRequest (400), badMethod (405), overLimit (413), itemNotFound (404), badMediaType (415), buildInProgress (409)
Status Transition: ACTIVE -> RESCUING -> ACTIVE
This operation places the server into RESCUING status.