Open Stack

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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