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Posted to dev@deltacloud.apache.org by "David Lutterkort (Created) (JIRA)" <ji...@apache.org> on 2011/11/17 19:31:51 UTC

[jira] [Created] (DTACLOUD-108) RHEV-M user_data trouble

RHEV-M user_data trouble
------------------------

                 Key: DTACLOUD-108
                 URL: https://issues.apache.org/jira/browse/DTACLOUD-108
             Project: DeltaCloud
          Issue Type: Bug
            Reporter: David Lutterkort
            Assignee: Michal Fojtik


For a number of reasons, the current way how we do user_data injection in RHEV-M causes heartburn. To address that, we need to

(a) take an antacid
(b) only report feature :instances, :user_data if the capabilities for that RHEV-M provider contain "//custom_property[@name='floppyinject']" (ideally, cache this in a long-lived cache keyed by RHEV-M provider URL)
(c) in rhevm_client.rb(create_vm) do not do any checks for version; instead, check if provider has floppyinject hook installed
(d) take another antacid

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[jira] [Commented] (DTACLOUD-108) RHEV-M user_data trouble

Posted by "Michal Fojtik (Commented) (JIRA)" <ji...@apache.org>.
    [ https://issues.apache.org/jira/browse/DTACLOUD-108?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13152767#comment-13152767 ] 

Michal Fojtik commented on DTACLOUD-108:
----------------------------------------

Hey,

Today I pushed patch which add 'has_capability?(name)' method that is executed before creating VM with 'user_data'.

Unfortunately this call require authentication. And since the features are listed in root entrypoint, we will need to add authentication
here, which I don't think is OK :-) (at least will make some Aeolus people antacid addicted).

Also note that you can have n-hosts in your cluster and some of them can support this injection and some not. How to indicate this
to the client?

For me, currently the most cleanest way how to sort this issue out is to throw decent Exception to client if cluster is not capable to
handle floppy_inject hook and client set 'user_data' property (something like Pre-requires failure, etc)
                
> RHEV-M user_data trouble
> ------------------------
>
>                 Key: DTACLOUD-108
>                 URL: https://issues.apache.org/jira/browse/DTACLOUD-108
>             Project: DeltaCloud
>          Issue Type: Bug
>            Reporter: David Lutterkort
>            Assignee: Michal Fojtik
>
> For a number of reasons, the current way how we do user_data injection in RHEV-M causes heartburn. To address that, we need to
> (a) take an antacid
> (b) only report feature :instances, :user_data if the capabilities for that RHEV-M provider contain "//custom_property[@name='floppyinject']" (ideally, cache this in a long-lived cache keyed by RHEV-M provider URL)
> (c) in rhevm_client.rb(create_vm) do not do any checks for version; instead, check if provider has floppyinject hook installed
> (d) take another antacid

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[jira] [Commented] (DTACLOUD-108) RHEV-M user_data trouble

Posted by "David Lutterkort (Commented) (JIRA)" <ji...@apache.org>.
    [ https://issues.apache.org/jira/browse/DTACLOUD-108?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13158724#comment-13158724 ] 

David Lutterkort commented on DTACLOUD-108:
-------------------------------------------

Yes, I agree - since there can be mixed clusters, the user has to be prepared for an error of 'user_data injection not possible'.

So let's just advertise user_data in the entrypoint and throw a decent exception if we can't find the floppyinject hook.
                
> RHEV-M user_data trouble
> ------------------------
>
>                 Key: DTACLOUD-108
>                 URL: https://issues.apache.org/jira/browse/DTACLOUD-108
>             Project: DeltaCloud
>          Issue Type: Bug
>            Reporter: David Lutterkort
>            Assignee: Michal Fojtik
>
> For a number of reasons, the current way how we do user_data injection in RHEV-M causes heartburn. To address that, we need to
> (a) take an antacid
> (b) only report feature :instances, :user_data if the capabilities for that RHEV-M provider contain "//custom_property[@name='floppyinject']" (ideally, cache this in a long-lived cache keyed by RHEV-M provider URL)
> (c) in rhevm_client.rb(create_vm) do not do any checks for version; instead, check if provider has floppyinject hook installed
> (d) take another antacid

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