Surport mxnet train distributed  on Kubernetes
Surport mxnet train distributed  on Kubernetes

In Kubernetes pod, 	a virtual ip(svc ip) was used for communication. But this virtual ip can't used for bind. 
So we suggest using 0.0.0.0 to bind scheduler port, and use the virtual ip for communication as before.
dmlc/ps-lite,dmlc/ps-lite,dmlc/ps-lite,dmlc/ps-lite