On Friday, April 13, 2018 at 10:39:38 AM UTC-4, Tim Hockin wrote: > The load is random, but the distribution should be approximately equal for > non-trivial loads. E.g. when we run tests for 1000 requests you can see it > is close to equal. > > > How unequal is it? Are you using session affinity? > > > > On Fri, Apr 13, 2018, 10:34 AM Cristian Cocheci <cristian...@gmail.com> wrote: > > > > Thank you Sunil, but the LoadBalancer type is used for exposing the service > externally, which I don't need. All I need is my service exposed inside the > cluster. > > > > > On Fri, Apr 13, 2018 at 10:30 AM, Sunil Bhai <placi...@gmail.com> wrote: > > > > HI, > > Check this once : > > https://kubernetes.io/docs/tasks/access-application-cluster/load-balance-access-application-cluster/ > > > https://kubernetes.io/docs/concepts/services-networking/service/ > > > > Sent from Mail for Windows 10 > > > From: cristian...@gmail.com > Sent: Friday, April 13, 2018 7:11 PM > To: Kubernetes user discussion and Q&A > Subject: [kubernetes-users] ClusterIP service not distributing requests > evenlyamong pods in Google Kubernetes Engine > > > I have a ClusterIP service in my cluster with 4 pods behind it. I noticed > that requests to the service are not evenly distributed among pods. After > further reading I learned that the kube-proxy pod is responsible for setting > up the iptables rules that forward requests to the pods. After logging into > the kube-proxy pod and listing the nat table rules, this is what I got: > > Chain KUBE-SVC-4F4JXO37LX4IKRUC (1 references) > target prot opt source destination > KUBE-SEP-6X4IVU3LDAAZJUPD all -- 0.0.0.0/0 0.0.0.0/0 > /* default/btm-calculator: */ statistic mode random probability 0.25000000000 > KUBE-SEP-TXRPWWIIUWW3MNFH all -- 0.0.0.0/0 0.0.0.0/0 > /* default/btm-calculator: */ statistic mode random probability 0.33332999982 > KUBE-SEP-HW6SF2LJM4S7X5ZN all -- 0.0.0.0/0 0.0.0.0/0 > /* default/btm-calculator: */ statistic mode random probability 0.50000000000 > KUBE-SEP-TTJKD52QZSH2OH4O all -- 0.0.0.0/0 0.0.0.0/0 > /* default/btm-calculator: */ > > The comments seem to suggest that the load is balanced according to the > static mode random probability with an uneven probability distribution. Is > this how it's supposed to work? Every piece of documentation that I read > about load balancing by a ClusterIP service indicates that it should be round > robin. Obviously this is not the case here. > Is there a way to set a ClusterIP to perform round robin load balancing? > > Thank you, > Cristian > > -- > You received this message because you are subscribed to the Google Groups > "Kubernetes user discussion and Q&A" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to kubernetes-use...@googlegroups.com. > To post to this group, send email to kubernet...@googlegroups.com. > Visit this group at https://groups.google.com/group/kubernetes-users. > For more options, visit https://groups.google.com/d/optout. > > > > > > > -- > > You received this message because you are subscribed to the Google Groups > "Kubernetes user discussion and Q&A" group. > > To unsubscribe from this group and stop receiving emails from it, send an > email to kubernetes-use...@googlegroups.com. > > To post to this group, send email to kubernet...@googlegroups.com. > > Visit this group at https://groups.google.com/group/kubernetes-users. > > For more options, visit https://groups.google.com/d/optout.
I am not using session affinity, and I am not sending a statistically significant number of requests. In my particular use case I only need to send a number of requests of 100 or less. I also have the problem that I mentioned above, if I send 20 requests in a loop, they ALL go to the same pod. If I wait a while and send another group of 20 requests, they MIGHT go to a different pod, but they all go to the same pod (even if different than the first one). This is a big issue for me, since my requests are actually heavy calculations, an I was hoping to use this mechanism as a way of parallelizing my computations. -- You received this message because you are subscribed to the Google Groups "Kubernetes user discussion and Q&A" group. To unsubscribe from this group and stop receiving emails from it, send an email to kubernetes-users+unsubscr...@googlegroups.com. To post to this group, send email to kubernetes-users@googlegroups.com. Visit this group at https://groups.google.com/group/kubernetes-users. For more options, visit https://groups.google.com/d/optout.
