Hi Brad,
What I have been experimenting with is a configuration where I install the
host sflow agent on my hypervisor which in my case is KVM. This allows me
to see both hypervisor and virtual machine statistics in ganglia with just
this single agent installed. I am looking to avoid the overhead of
installing either ganglia agents or host sflow agents on all of the virtual
machines. At the same time, I want to understand how the complete system
looks from the hypervisor perspective. See Chapter 8 of the "Monitoring
with Ganglia" book, table 8-2, to get an idea of available metrics.
However, in my experience it is nevertheless possible to install ganglia or
host sflow agents on the virtual machines directly and have statistics
reported to ganglia in that manner, if you have a reason to do it. In my
environment, I use strictly unicast.
Greg
On Wed, Jan 7, 2015 at 8:19 AM, Brad Hough <bahaiho...@gmail.com> wrote:
> I'm new to Ganglia and have a couple of questions and want to confirm that
> I'm not misreading the documentation. I'm trying to monitor some virtual
> machines. They happen to all be Centos virtual machines running on a Mint
> host. All the virtual machines are on a virtual network and can all see
> each other perfectly fine (For instance I can ping each from each other and
> they can send packets to each other in the normal fashion using TCP/UDP to
> a specific port. I've turned the firewall off for each of them just to get
> past my initial testing). If I wanted to have one of these virtual
> machines monitor the rest, do I still need to use sFlow? What if I switch
> to unicast? Being a newbie, I'm trying to understand what about the
> virtual network makes it so you can't just treat the virtual machines as
> bare metal?
>
> Probably already answered before, but if it has, can you point me to a
> post, because I don't readily see it.
>
> Thank you,
> Brad H.
>
>
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leadership blogs to news, videos, case studies, tutorials and more. Take a
look and join the conversation now. http://goparallel.sourceforge.net
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