I have executed the mongo as statefulset with 3 replicaset and created successfully in ICP environment

When I exected the rs.initiate it failed with HostUnreachable

Please find my attached docker file 

rs.initiate(
...

{ ... _id: "rs0", ... version: 1, ... members: [ ... \{ _id: 0, host : "mongo-0:27017" }

,
... { _id: 1, host : "mongo-1:27017" },
... { _id: 2, host : "mongo-2:27017" }
... ]
... }
... )
{
"ok" : 0,
"errmsg" : "replSetInitiate quorum check failed because not all proposed set members responded affirmatively: mongo-1:27017 failed with HostUnreachable, mongo-2:27017 failed with HostUnreachable",
"code" : 74,
"codeName" : "NodeNotFound"