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The rescue extension lets you put a server into a "rescue" status when the virtual instance will be replaced with a "rescue" image.
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To use this extension, you do not have to be an administrator. You must have configured a rescue image for use on your cloud.
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.. Are there any pre-requisites prior to using it such as special hardware or configuration?
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To obtain current information the extensions available to you, issue an EXTENSION query on the OpenStack system where it is installed, such as http://mycloud.com/v1.1/tenant/extensions.
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http://docs.openstack.org/ext/rescue/api/v1.1
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This extension enables rescue capabilities for OpenStack Compute servers so that virtual instances running in the cloud may be put in a rescue status.
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Sample Query Responses
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----------------------
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As shown below, responses to an EXTENSION query in XML or JSON provide basic information about the extension.
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Extension Query Response: XML::
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Extension Query Response: JSON::
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{"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"}]}
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Document Change History
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-----------------------
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============= =====================================
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Revision Date Summary of Changes
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2011-09-14 Initial draft
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============= =====================================
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This extension to the OpenStack Compute API enables rescue of running instances.
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To support these new actions, the extension also issues new (faults, headers, resources, states, you name it.)
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List the actions each in a section. Enter "None" if there are no changes.
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Include the response codes, transitions if applicable, and XML and JSON examples.
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Changes to the Cloud Servers Specification
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------------------------------------------
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List the specific changes to the API. For example:
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In section 4.1.1 (List Servers) of the Cloud Servers Specification: Examples 4.1 and 4.2 should be replaced with Example 2.7 and Example 2.8 below.
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Provide examples in XML and JSON
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