Hi there, OpenNebula OCCI implementation does not uses management verbs. In turn, it uses the VM representation to update the state via a PUT HTTP verb. So * Start a VM with template T: Is POSTing a COMPUTE representation to the COMPUTE POOL * Start 2 VMs with template T: Is POSTing it twice * Stop one or both of them: Is getting the representation and change it to reflect the STOP state and PUTting them back to the COMPUTE resource Regards, -Tino -- Constantino Vázquez, Grid Technology Engineer/Researcher: http://www.dsa-research.org/tinova DSA Research Group: http://dsa-research.org Globus GridWay Metascheduler: http://www.GridWay.org OpenNebula Virtual Infrastructure Engine: http://www.OpenNebula.org On Wed, Sep 30, 2009 at 1:22 PM, Alexis Richardson <alexis.richardson@gmail.com> wrote:
Hi all,
If Open Nebula have implemented OCCI then it would be great to see details from them on the VM lifecyle management verbs.
* Start a VM with template T * Start 2 VMs with template T * Stop one or both of them
alexis
On Wed, Sep 30, 2009 at 12:18 PM, Edmonds, AndrewX <andrewx.edmonds@intel.com> wrote:
Hi all, I've gone through the walk through and have a list of comments and suggested changes. I will be continuing on through the spec with a similar intention of contributing comments and suggested changes.
Thijs, if you like I can add these to the tracker unless you want to pre-process them?
I do not suggest discussing any of these via the mailing list. That discussion can happen via the issue tracker.
Andy
* General * Would be useful to introduce the notion of OCCI extensions in the walk through * A page break should be inserted to separate the walkthrough and "OCCI Core Specification" * Revise usage of brackets
* Paragraph 4 "resource or type of resource" * what's the difference here?
* Paragraph 4 "and search" * note that this is an extension and may not be supported in all implementations
* Paragraph 5 Bracket usage in the sentence "Certain types of accesses..." * would read better as: Certain types of accesses, such as a compute resource querying OCCI for introspection and configuration, may be possible anonymously in the case where the query has already been authenticated by interface and/or IP address.
* Paragraph 6 "Should you be redirected by the API to a node, storage device, etc. (for example, to retrieve a large binary representation) then you should either be able to transparently authenticate or a signed URL should be provided." * If the basic authentication is not cached then this transparent authentication will not happen. Is what I say a correct statement?
* Paragraph 6 "(at least not yet!)" * Remove this, not necessary.
* Paragraph 6 "and while OCCI standardises a number of them for interoperability" * We can only recommend other standards for use in OCCI not standardise them - that's the responsibility of the relevant standards body
* Paragraph 6 List of representations * I do not agree that a screenshot or access to console is an appropriate general entity representation like what OVF/OVA are. These items are more suitable as attributes in an entity representation (OVF/OVA/OCCI). Suggest removing or noting that they are lesser forms.
* Paragraph 7 "The client indicates which representation(s) it desires by way of the URL" * An example illustrating this might be useful e.g. * To request a HTML rendering, if supported, of a compute node issue http://example.com/path/to/compute/resource/123-123-123.html * The same might be for the content negotiation.
* Paragraph 8 "In addition to the protocol itself," * Remove the protocol includes interaction semantics, syntax and data schemas.
* Paragraph 8 "In addition to the protocol itself, OCCI defines a simple key/value based descriptor format for cloud infrastructure resources:". * Reword to: "OCCI defines a simple key/value based descriptor format for cloud infrastructure resources. These infrastructure resources as defined by OCCI are:".
* Paragraph 8 Formatting * Embolden compute storage and network - these are core concepts to OCCI.
* Paragraph 9 Comment * If we say that it is trivial to translate and present an example that example should show the trivial translation. In this case we should add the XML and JSON examples.
* Paragraph 10 Starting "The primary drawback is that" ending "or HTTP 410 Gone otherwise)." * Is this necessary here - might be better moved out of the walkthrough to elsewhere or just removed.
* Paragraph 10 Comment * Bracket usage should be reviewed.
* Paragraph 12 "UUIDs anyway" * Remove "anyway".
* Paragraph 12 "used instead (e.g. http://amazon.com/compute/ami-ef48af86)." * Any significance using this URL - better we use something fictional
* Paragraph 12 "can be safely allocated by any node" * What's a "node"? A resource? A resource manager?
* Section 2.3 Comment * A brief introduction should be inserted here.
* Paragraph 13 "POST it to" * What is "it"? Explicate.
* Paragraph 13 "as an HTML form" * More correct to say "POST the attributes and values using the application/x-www-form-urlencoded format"
* Paragraph 15 "to GET a template" * New concept introduced with no explanation. Explain briefly (footnote?) or drop and move discussion elsewhere in doc.
* Paragraph 15 "POST or PUT it back" * There are semantic differences here that should be noted to the reader.
* Paragraph 17 P18 Comment * It would make more sense to inform the user how to get a list of supported renders per provider first and then tell how to request it. As it initially reads it appears that 2 calls are needed.
* Paragraph 19 "There are two options:" * Better phrased as "There are two concepts that are supported"
* Paragraph 19 "such as searches" * Change to "such as the collections returned from the search extension"
* Paragraph 19 Pass-by-ref, pass-by-value * This is more a metaphor - might be worth explaining what is meant by these explicitly, otherwise the reader is left to interpret.
* Paragraph 20 "Update" * It says to PUT but I can also update via POST and be naughty.
* Paragraph 22 Comment * What about "Resource Child Collections".
* Paragraph 22 Comment * These are in effect extensions to the core and so should be noted as such.
* Paragraph 24 "Requests" * Just a comment - isn't this very RPC-like something that REST aims to avoid?
* Paragraph 24 "Requests" * A number of request types are mentioned but nowhere in the spec are they detailed.
Andy Edmonds skype: andy.edmonds tweets: @dizz
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