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From "Murali Reddy (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (CLOUDSTACK-6925) [OVS] get rid custom logic to create bridges on hosts in the XenServer pool
Date Tue, 17 Jun 2014 11:36:02 GMT

     [ https://issues.apache.org/jira/browse/CLOUDSTACK-6925?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Murali Reddy updated CLOUDSTACK-6925:
-------------------------------------

    Priority: Critical  (was: Major)

> [OVS] get rid custom logic to create bridges on hosts in the XenServer pool
> ---------------------------------------------------------------------------
>
>                 Key: CLOUDSTACK-6925
>                 URL: https://issues.apache.org/jira/browse/CLOUDSTACK-6925
>             Project: CloudStack
>          Issue Type: Bug
>      Security Level: Public(Anyone can view this level - this is the default.) 
>    Affects Versions: 4.2.0
>            Reporter: Murali Reddy
>            Assignee: Murali Reddy
>            Priority: Critical
>             Fix For: 4.4.0
>
>
> In XenServer, when we created a GRE tunnel network, they don't have a PIF attached it.
XenServer treats network without a PIF attached as internal network. In a pool, XenServer
internal network is visible across the hosts in the pool, but bridge is created only on the
first host on which VIF connected to internal network is started. On rest of the hosts when
VM is started, xapi fails with VM_REQUIRES_NETWORK exception. CloudStack had workaround for
this problem where it creates a dom0 VIF connected to the network. Which plugged and unplugged
to ensure bridge is created on all hosts in the pool. This approach is error prone and resulted
in multiple issues.
> Recommended way by XenServer, is to mark the network other-config param assume_network_is_shared
set to true.
> Network.other_config:assume_network_is_shared=true
> This will ensure, when a VM connected to a internal network is launched on any host in
the pool, bridge is automatically provisioned.



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