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From: Sateesh Chodapuneedi <sateesh.chodapuneedi@citrix.com>
To: "cloudstack-dev@incubator.apache.org"
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Date: Tue, 18 Dec 2012 01:10:55 +0530
Subject: [ASF41][DISCUSS] Adding support for VMware dvSwitch
Thread-Topic: [ASF41][DISCUSS] Adding support for VMware dvSwitch
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Hi,


I am planning to work on enabling support for VMware native dvSwitch in Clo=
udStack. Filed a jira ticket for it, see [1].


Integration of VMware dvSwitch with CloudStack enables orchestration of vir=
tual networks in VMware environment over distributed virtual switch inside =
vCenter.


Background

-----------

VMware Distributed Switch is an aggregation of per-host virtual switches pr=
esented and controlled as a single distributed switch through vCenter Serve=
r at the Datacenter level. vDS abstracts configuration of individual virtua=
l switches and enables centralized provisioning, administration, and monito=
ring.

vDS is integral component of vCenter. Hence the native vDS support makes se=
nse for wider and larger deployments of Cloudstack over vSphere.


Each Standard vSwitch represents an independent point of configuration that=
 needs to be managed and monitored. The management of virtual networks requ=
ired by instances in the cloud is tedious when virtual networks have to spa=
n across large number of hosts. Using distributed vSwitch (vDS) simplifies =
the configuration and monitoring.


Being standalone implementations, standard vSwitches do not provide any sup=
port for virtual machine mobility. So there needed a component  to ensure t=
hat the network configurations on the source and the destination virtual sw=
itch are consistent and will allow the VM to operate without breaking conne=
ctivity or network policies. Particularly during migration of VM across hos=
ts, the sync up among peers need to be taken care.  However in case of dist=
ributed vSwitch during VMotion, the vCenter server, would update the vSwitc=
h modules on the hosts in cluster accordingly.


I'll share an FS for this in the next few days.

Please do let me know your thoughts/concerns.


[1] CLOUDSTACK-657 - "VMware vNetwork Distributed Virtual Switch support in=
 CloudStack"


Regards,

Sateesh


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