Resolving containers by their hostnames

Rancher 1.x
1

I am having trouble resolving containers by their hostnames, I am able to resolve some the containers but not all of them, I thought this was a host issue, I tried destroying and recreating them again, I see this pattern consistently

Here are the details of my setup

Custom - Cent OS 7.1 VMs
Rancher v1.1.4
Cattle v0.165.8.4
User Interface v1.1.14
Rancher Compose v0.8.6
Kubernetes 1.2.4
Docker 1.2

Any help would be greatly appreciated

Thanks

2

Can you elaborate on how this issue becomes apparent and how you are testing whether resolution works or not. For example;

  • Are you just using tools like dig or nslookup
  • Do applications fail because of this
  • Where doesn’t resolution work
3

I am using busybox container to resolve containers by their hostnames, this is what I have observed

  1. I can’t ping a service by its ip even when it has end points associated with it, I can resolve the service_name when do nslookup based on svc_name or svc_name.default
  2. I can ping containers by their ip addresses, but I can’t resolve them by their hostnames

Current app that I am working on has a clustering feature built in, containers can’t join a cluster as they can’t resolve each other by their hostnames

Thanks for your help!