Open Stack

are you using openvswitch? which version?
if yes,is it consuming a lot of CPU?

On Wed, Dec 10, 2014 at 7:45 PM, André Aranha <andre.f.aranha at gmail.com> wrote:
> Well, here we are using de Icehouse with Ubuntu 14.04 LTS
>
> We found this thread in the community  and we apply the changes in the
> compute nodes (change VHOST_NET_ENABLED to 1 in /etc/default/qemu-kvm).
> After do this, a few instances the problem doesn't exists anymore. This link
> show an investigation to find the problem.
>
> About the MTU in our cloud (using iperf),
>
> 1-from any the Desktop to the Network Node
> MSS size 1448 bytes (MTU 1500 bytes, ethernet)
>
> 2-from any Desktop to the instance
> MSS size 1348 bytes (MTU 1388 bytes, unknown interface)
>
> 3- from any instance to the Network Node
> MSS size 1348 bytes (MTU 1388 bytes, unknown interface)
>
> 4- from any instance to the Desktop
> MSS size 1348 bytes (MTU 1388 bytes, unknown interface)
>
> 5-from Network Node to any ComputeNode
> MSS size 1448 bytes (MTU 1500 bytes, ethernet)
>
> 6-from any ComputeNode to NetworkNode
> MSS size 1448 bytes (MTU 1500 bytes, ethernet)
>
> On 10 December 2014 at 10:31, somshekar kadam <som_kadam at yahoo.co.in> wrote:
>>
>> Sorry for wrong post mail chain.
>>
>>
>> Regards
>> Neelu
>>
>>
>> On Wednesday, 10 December 2014 6:59 PM, somshekar kadam
>> <som_kadam at yahoo.co.in> wrote:
>>
>>
>> Hi All,
>>
>> Please recommend which stable Host OS to use for Controller and Compute
>> node.
>> I have tried Fedora20 seems lot of tweaking is required, corerct me If I
>> am wrong.
>> I see that most of it is tested on ubuntu and centos.
>> I am planning to use JUNO stable version.
>> Please help on this
>>
>>
>> Regards
>> Neelu
>>
>>
>> On Wednesday, 10 December 2014 5:42 PM, Hannah Fordham
>> <hfordham at radiantworlds.com> wrote:
>>
>>
>> I'm afraid we didn't, we're still struggling with some VMs with this
>> problem. Sorry!
>>
>> On 9 December 2014 14:09:32 GMT+00:00, "André Aranha"
>> <andre.f.aranha at gmail.com> wrote:
>>
>> Hi,
>>
>> We are with the same issue here, and already try some solutions that
>> didn't work at all. Did you solved this problem?
>>
>> Thank you,
>> Andre Aranha
>>
>> On 27 August 2014 at 08:17, Hannah Fordham <hfordham at radiantworlds.com>
>> wrote:
>>
>> I’ve been trying to figure this one out for a while, so I’ll try and be as
>> thorough as possible in this post but apologies if I miss anything pertinent
>> out.
>>
>> First off, I’m running a set up with one control node and 5 compute nodes,
>> all created using the Stackgeek scripts -
>> http://www.stackgeek.com/guides/gettingstarted.html. The first two (compute1
>> and compute 2) were created at the same time, compute3, 4 and 5 were added
>> as needed later. My VMs are predominantly CentOS, while my Openstack nodes
>> are Ubuntu 14.04.1
>>
>> The symptom: irregular high latency/packet loss to VMs on all compute
>> boxes except compute3. Mostly a pain when trying to do anything via ssh on a
>> VM because the lag makes it difficult to do anything, but it shows itself
>> quite nicely through pings as well:
>> --- 10.0.102.47 ping statistics ---
>> 111 packets transmitted, 103 received, 7% packet loss, time 110024ms
>> rtt min/avg/max/mdev = 0.096/367.220/5593.100/1146.920 ms, pipe 6
>>
>>
>> I have tested these pings:
>> VM to itself (via its external IP) seems fine
>> VM to another VM is not fine
>> Hosting compute node to VM is not fine
>> My PC to VM is not fine (however the other way round works fine)
>>
>>
>> Top on a (32 core) compute node with laggy VMs:
>> top - 12:09:20 up 33 days, 21:35,  1 user,  load average: 2.37, 4.95, 6.23
>> Tasks: 431 total,   2 running, 429 sleeping,   0 stopped,   0 zombie
>> %Cpu(s):  0.6 us,  3.4 sy,  0.0 ni, 96.0 id,  0.0 wa,  0.0 hi,  0.0 si,
>> 0.0 st
>> KiB Mem:  65928256 total, 44210348 used, 21717908 free,   341172 buffers
>> KiB Swap:  7812092 total,  1887864 used,  5924228 free.  7134740 cached
>> Mem
>>
>> And for comparison, on the one compute node that doesn’t seem to be
>> suffering from this:
>> top - 12:12:20 up 33 days, 21:38,  1 user,  load average: 0.28, 0.18, 0.15
>> Tasks: 399 total,   3 running, 396 sleeping,   0 stopped,   0 zombie
>> %Cpu(s):  0.3 us,  0.1 sy,  0.0 ni, 98.9 id,  0.6 wa,  0.0 hi,  0.0 si,
>> 0.0 st
>> KiB Mem:  65928256 total, 49986064 used, 15942192 free,   335788 buffers
>> KiB Swap:  7812092 total,   919392 used,  6892700 free. 39272312 cached
>> Mem
>>
>> Top on a laggy VM:
>> top - 11:02:53 up 27 days, 33 min,  3 users,  load average: 0.00, 0.00,
>> 0.00
>> Tasks:  91 total,   1 running,  90 sleeping,   0 stopped,   0 zombie
>> Cpu(s):  0.2%us,  0.1%sy,  0.0%ni, 99.5%id,  0.1%wa,  0.0%hi,  0.0%si,
>> 0.0%st
>> Mem:   1020400k total,   881004k used,   139396k free,   162632k buffers
>> Swap:  1835000k total,    14984k used,  1820016k free,   220644k cached
>>
>> http://imgur.com/blULjDa shows the hypervisor panel of Horizon. As you can
>> see, Compute 3 has fewer resources used, but none of the compute nodes
>> should be anywhere near overloaded from what I can tell.
>>
>> Any ideas? Let me know if I’m missing anything obvious that would help
>> with figuring this out!
>>
>> Hannah
>>
>>
>>
>>
>>
>>
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