Kuberentes will be giving a /24 to each node, not each pod. Each node will give one IP out of that /24 to a pod it controls. This default means you can have 253 pods-per-node. This of course can be adjust depending on the size of your pods and nodes.
This means that you can fully utilize the /16 for pods (minus per-node network, broadcast, gateway) On Fri, Aug 11, 2017 at 4:36 PM, David Rosenstrauch <dar...@darose.net> wrote: > According to the docs, k8s can support systems of up to 150000 pods. (See > https://kubernetes.io/docs/admin/cluster-large/) But given k8s' > networking model, I'm a bit puzzled on how that would work. > > It seems like a typical setup is to assign a service-cluster-ip-range with > a /16 CIDR. (Say 10.254.0.0/16) However, I notice that my cluster > assigns a full /24 IP range to each pod that it creates. (E.g., pod1 gets > 10.254.1.*, pod2 gets 10.254.2.*, etc.) Given this networking setup, it > would seem that Kubernetes would only be capable of launching a maximum of > 256 pods. > > Am I misunderstanding how k8s works in this r? Or is it that the > networking would need to be configured differently to support more than 256 > pods? > > Thanks, > > DR > > -- > 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. > -- 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.
