Ah. That makes a bit more sense.
Thanks!
DR
On 2017-08-11 10:41 am, Ben Kochie wrote:
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/ [1]) 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 [2])
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
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