On Sep 4, 2012, at 3:01 PM, Leander Bessa Beernaert <leande...@gmail.com> wrote:
> Question follows inlined below. > > On Tue, Sep 4, 2012 at 6:48 PM, Vishvananda Ishaya <vishvana...@gmail.com> > wrote: > > On Sep 4, 2012, at 8:35 AM, Leander Bessa Beernaert <leande...@gmail.com> > wrote: > >> Hello all, >> >> I've had a few reports from users testing out the sample installation of >> OpenStack i setup. The reports were all related to problems with inter-vm >> network speeds and connection timeouts as well as the inability to connect >> to the outside word from within the VM (e.g.: ping www.google.com). I'm not >> sure if i setup something wrong, so i have a few questions. >> >> The current installation of OpenStack is running with 1 controller node, and >> 8 compute nodes. Each node is running Ubuntu 12.04 and Essex with the >> default packages. I'm using the VLAN network manager. There is one >> peculiarity to this setup. Since each physical hosts only has 1 network >> interface, i came up with the following configuration: >> - For inter-node communications i set up a VLAN with the ID 107 >> - Each tentant has it's private network on a separate VLAN. Currently >> there are two tenant, one on VLAN 109 (network: 10.0.9.0/24) and another on >> VLAN 110 (network: 10.0.9.0/24). >> >> I'm not a network expert, so please bear with me if i make any outrages >> statements. >> >> 1) When communicating on the private network, the packets are not routed >> through the controller right? That only happens when the VM needs to contact >> an external source (e.g.: google), correct? This report originated from >> users from VLAN 109. They are using network intensive applications which >> send a lot of data between each of the instances. They reported various >> time-out and connection drops as well as slow transfer speeds. I'm no >> network expert, but could this be related to the routing, VLANs or is it a >> hardware issue? > > There are a lot of things that could cause this. You would need to do some > extensive debugging to find the source of this. > > Any ideas where i can start looking? > Also, communications between two VMs on different compute nodes from the same > tenant do not need to be routed through the controller node right? in non-multi_host mode I believe it will go through the controller. Vish
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