Kubernetes复制控制器调度

Question

如果我在kubernetes集群中有3个小兵，是否可以告诉复制控制器在minion1上创建20％的Pod，在minion2上创建50％的容器，在Minion 3上创建30％的容器？

Answer 1

Unfortunately right now the answer is no. The easiest thing to do is to create three replication controllers, each with the desired number of replicas, and each with a podTemplate that uses nodeSelector to pick one node. This has the downside that you are specifying an exact node name, so if that node fails, the pods will go pending.

As @bitchecker said, in theory you could use one ReplicationController and use the --max-pods option on each node. This is tricky, though, because system pods like Heapster will be included in the count, and in any event it doesn't work if you want to share the node with pods from other ReplicationControllers. (And it has the same problem from above, where it doesn't really work when the node fails and you want those pods to be rescheduled onto another node).

I don't think writing your own scheduler would be the right approach, but you could write your own controller or modify ReplicationController, if you are ambitious. :-)

Good luck!

Answer 2

我认为唯一的方法是使用--max-pods选项配置每个节点。

Answer 3

Yes. But you have to write custom Scheduler with your logic.