Rancher internal DNS not working

Rancher 1.x
1

Hello.
We just started to test Rancher to use it on our infrastucture. We are very happy but maybe we are doing something wrong because we can’t go ahead because this problem.

I am going to detail all steps here.

I started a clean install of Rancher on Centos 7.2 on a bare metal server.

Steps:

  • Installed docker-engine 1.9.1
    yum install docker-engine -y

  • Installed Rancher server
    docker run -d -v /data/mysql:/var/lib/mysql --restart=always -p 8080:8080 rancher/server

  • Rancher version installed:
    Component Version Rancher v0.50.0 Cattle v0.126.0 User Interface v0.74.0 Rancher Compose v0.6.2

  • Access to the server via rancher.test.com:8080

  • Add a new host via ui option with custom.
    sudo docker run -d --privileged -v /var/run/docker.sock:/var/run/docker.sock rancher/agent:v0.8.2 http://rancher.test.com:8080/v1/scripts/0D96A3705AAC136E7B9C:1450285200000:7JqtNwHQQblCIZ6IjZtsuTm5LA

  • Started a service with
    image: ubuntu:14.04.3
    command: bash

  • List the containers with docker ps:
    CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES 59063c783744 ubuntu:14.04.3 "bash" 17 minutes ago Up 17 minutes b0b3f2bf-0eed-468b-b03d-7d41fdd5d309 d2e5d2ad2218 rancher/agent-instance:v0.6.0 "/etc/init.d/agent-in" 18 minutes ago Up 18 minutes 0.0.0.0:500->500/udp, 0.0.0.0:4500->4500/udp 670c73ba-059f-49de-a302-833a216f87b3 f382f587e3e3 rancher/agent:v0.8.2 "/run.sh run" 21 minutes ago Up 21 minutes rancher-agent 5fe6cce4ba4f rancher/server "/usr/bin/s6-svscan /" 25 minutes ago Up 25 minutes 3306/tcp, 0.0.0.0:8080->8080/tcp sad_meitner

  • Access to container:
    docker exec -it b0b3f2bf-0eed-468b-b03d-7d41fdd5d309 bash

  • Watch the file /etc/resolv.conf
    # nameserver 213.186.33.99 search ovh.net rancher.internal nameserver 169.254.169.250

  • Use dig command to test dns
    root@59063c783744:/# dig rancher-metadata ;; reply from unexpected source: 10.42.54.106#53, expected 169.254.169.250#53

We can’t ping any server and we can not connect to anything.
Has anyone the same problem or maybe similar? Any help with this could be great.

Thanks you for your help.