Open Stack

Our compute nodes are using vhost_net, we haven't made any changes to
buffer our NIC.
The system is not over loaded, cpu usage aren't higher than 30%

On 12 December 2014 at 02:35, mad Engineer <themadengin33r at gmail.com> wrote:
>
> so looks like its not the issue with openvswitch,missed is quite
> normal,it is not the reason for packet loss
> is your guests using vhost_net?
> do
> ps aux|grep vhost
> also have you made any changes to buffer size of your NIC?
> is the system over loaded what is the cpu usage
>
> On Thu, Dec 11, 2014 at 6:20 PM, André Aranha <andre.f.aranha at gmail.com>
> wrote:
> > Thanks for the advice, i've run the command in NetworkNode and in a
> > ComputeNode and lost is 0, but missed is a high value.
> >
> > NetworkNode
> > system at ovs-system:
> > lookups: hit:425667155 missed:2962922 lost:0
> > flows: 27
> > port 0: ovs-system (internal)
> > port 1: br-ex (internal)
> > port 2: br-tun (internal)
> > port 3: eth1
> > port 4: br-int (internal)
> > port 5: tapbdc3d959-d8 (internal)
> > port 6: gre_system (gre: df_default=false, ttl=0)
> > port 7: qr-4063db49-6b (internal)
> > port 8: qg-e427e527-92 (internal)
> >
> >
> > ComputeNode
> > system at ovs-system:
> > lookups: hit:28660666 missed:200922 lost:0
> > flows: 19
> > port 0: ovs-system (internal)
> > port 1: br-int (internal)
> > port 2: br-tun (internal)
> > port 3: gre_system (gre: df_default=false, ttl=0)
> > port 4: em1
> > port 5: br-private (internal)
> > port 6: qvo9a959049-a0
> > port 7: qvodd0ef077-e1
> > port 8: qvoac2b566b-65
> > port 9: qvo9e4ab149-5c
> > port 10: qvoc2d2625c-0c
> > port 11: qvo3069daeb-4a
> > port 12: qvo7f82a3cf-0c
> > port 13: qvo83b77d2d-1a
> > port 14: qvobbadd8c2-30
> > port 15: qvocfd0b8e8-ad
> > port 16: qvo714fab88-60
> > port 17: qvob9ddde49-86
> > port 18: qvo42ef9f3b-ac
> > port 19: qvof4ae7868-41
> > port 20: qvoa4408a18-03
> > port 22: qvo36c64d52-9b
> >
> > On 11 December 2014 at 06:17, mad Engineer <themadengin33r at gmail.com>
> wrote:
> >>
> >> sorry its 2.3.0 not 2.1.3
> >>
> >> On Thu, Dec 11, 2014 at 2:43 PM, mad Engineer <themadengin33r at gmail.com
> >
> >> wrote:
> >> > Not in openstack,i had performance issue, with OVS and bursty traffic
> >> > upgrading to later version improved the performance.A lot of
> >> > performance features have been added in  2.1.3.
> >> >
> >> > Do you have lots of lost: value in
> >> > ovs-dpctl show
> >> >
> >> >
> >> > On Thu, Dec 11, 2014 at 2:33 AM, André Aranha <
> andre.f.aranha at gmail.com>
> >> > wrote:
> >> >> Yes, we are using version 2.0.2.
> >> >> The process uses only about 0.3% on network node and compute node.
> >> >> Did you have the same issue?
> >> >>
> >> >> On 10 December 2014 at 14:31, mad Engineer <themadengin33r at gmail.com
> >
> >> >> wrote:
> >> >>>
> >> >>> 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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> >> >>> >> 07822337).
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> >> >>> >>
> >> >>> >> _______________________________________________
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> >> >>> >>
> >> >>> >> --
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> >> >>> >> brevity.
> >> >>> >>
> >> >>> >>
> >> >>> >> ***********
> >> >>> >>
> >> >>> >> Radiant Worlds Limited is registered in England (company no:
> >> >>> >> 07822337).
> >> >>> >> This message is intended solely for the addressee and may contain
> >> >>> >> confidential information. If you have received this message in
> >> >>> >> error
> >> >>> >> please
> >> >>> >> send it back to us and immediately and permanently delete it from
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> >> >>> >> cannot
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> >> >>> >
> >> >>> >
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>
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