[jboss-jira] [JBoss JIRA] (AS7-430) DomainController discovery system

[Brian Stansberry (JIRA)]

    [ https://issues.jboss.org/browse/AS7-430?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12710551#comment-12710551 ] 

Brian Stansberry commented on AS7-430:
--------------------------------------

Log of a chat I had with Kabir:

[6/20/12 3:14:19 PM] Brian Stansberry: ideally at some point we'll add other mechanisms for "discovering" the DC
[6/20/12 3:14:38 PM] Brian Stansberry: multicast, maybe Amazon S3 or equivalents
[6/20/12 3:15:17 PM] Brian Stansberry: so, when designing the API/xml it's good to think those things through
[6/20/12 3:15:50 PM] Kabir Khan: At least I have some knowledge of EC2 now
[6/20/12 3:16:40 PM] Kabir Khan: or you said s3
[6/20/12 3:17:10 PM] Brian Stansberry: well, S3 is where shared state can be stored, i.e. address/port of the DC
[6/20/12 3:17:26 PM] Brian Stansberry: so slaves are configured with info needed to access S3 and get the data
[6/20/12 3:18:15 PM] Brian Stansberry: JGroups S3_PING protocol works that way -- it's a "discovery" protocol used when a peer needs to figure out who's in the group so it can join
[6/20/12 3:19:06 PM] Kabir Khan: So the simple initial version would have hard-wired ip addresses, but needs to be flexible enough to use other mechanisms for discovery
[6/20/12 3:19:56 PM] Brian Stansberry: really, discovery and backup could be considered semi-separate things
[6/20/12 3:20:11 PM] Brian Stansberry: i.e. right now we have hard-wired discovery
[6/20/12 3:20:20 PM] Brian Stansberry: and we need to add backup
[6/20/12 3:20:28 PM] Brian Stansberry: later we need to add other forms of discovery
[6/20/12 3:21:10 PM] Brian Stansberry: the trick is to figure out how to best represent those concepts in the xml and in the mgmt resources
[6/20/12 3:21:33 PM] Kabir Khan: Yeah, I'll give it some thought
[6/20/12 3:21:51 PM] Brian Stansberry: although, backup could just be handled as an ordered list of discovery options
[6/20/12 3:22:24 PM] Brian Stansberry: so anytime a master needs to be contacted, loop through all the provided options
[6/20/12 3:23:26 PM] Brian Stansberry: thinking about it more, that's probably conceptually cleanest
                
> DomainController discovery system
> ---------------------------------
>
>                 Key: AS7-430
>                 URL: https://issues.jboss.org/browse/AS7-430
>             Project: Application Server 7
>          Issue Type: Task
>          Components: Domain Management
>            Reporter: Brian Stansberry
>            Assignee: Farah Juma
>             Fix For: 7.2.0.CR1
>
>
> Mechanism(s) by which a Host Controller finds a Domain Controller so it can begin the process of integrating into the domain.
> Task includes the host.xml schema elements to configure this, the domain object model classes behind those elements, and the actual implementation of discovery from both the ServerManager and DomainController sides.

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