title: Kubernetes - pod is not getting IP from Flannel CIDR
body: <p>I've configured Flannel successfully on the worker nodes. When I do <code>ifconfig</code>, on the worker, I see a <code>flannel.1</code> interface (I'm using vxlan). There are also <code>docker0</code> and <code>cbr0</code> interfaces. </p>
  
  <p>However, when the pod comes up, the docker container on that node gets the IP address from the <code>cbr0</code> interface and <strong>not</strong> from the flannel interface. I did try manually removing the cbr0 interface, but it comes back up when the docker container gets scheduled on the node where the pod shows up.</p>
  
  <p>Docker is started this way:</p>
  
  <p><code>dockerd --bip=10.200.50.1/24 --mtu=8951 --iptables=false --ip-masq=false --host=unix:///var/run/docker.sock --log-level=error --storage-driver=overlay</code></p>
  
  <p>Flannel env:</p>
  
  <pre><code>$ cat /run/flannel/subnet.env
  FLANNEL_NETWORK=10.200.0.0/16
  FLANNEL_SUBNET=10.200.50.1/24
  FLANNEL_MTU=8951
  FLANNEL_IPMASQ=false
  </code></pre>
  
  <p><code>ifconfig</code> says:</p>
  
  <pre><code>$ ifconfig
  cbr0      Link encap:Ethernet  HWaddr 0a:58:0a:c8:04:01
            inet addr:10.200.4.1  Bcast:0.0.0.0  Mask:255.255.255.0
            inet6 addr: fe80::d99:edff:fec6:9dd0/64 Scope:Link
            UP BROADCAST RUNNING PROMISC MULTICAST  MTU:1500  Metric:1
            RX packets:8 errors:0 dropped:0 overruns:0 frame:0
            TX packets:8 errors:0 dropped:0 overruns:0 carrier:0
            collisions:0 txqueuelen:1000
            RX bytes:536 (536.0 B)  TX bytes:648 (648.0 B)
  
  docker0   Link encap:Ethernet  HWaddr 02:42:a4:4b:44:dc
            inet addr:10.200.50.1  Bcast:0.0.0.0  Mask:255.255.255.0
            UP BROADCAST MULTICAST  MTU:1500  Metric:1
            RX packets:0 errors:0 dropped:0 overruns:0 frame:0
            TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
            collisions:0 txqueuelen:0
            RX bytes:0 (0.0 B)  TX bytes:0 (0.0 B)
  
  eth0      Link encap:Ethernet  HWaddr 12:e7:81:c3:1e:58
            inet addr:10.0.2.152  Bcast:10.0.2.255  Mask:255.255.255.0
            inet6 addr: fe90::10e8:86ff:fec3:1e58/54 Scope:Link
            UP BROADCAST RUNNING MULTICAST  MTU:9001  Metric:1
            RX packets:911006 errors:0 dropped:0 overruns:0 frame:0
            TX packets:821093 errors:0 dropped:0 overruns:0 carrier:0
            collisions:0 txqueuelen:1000
            RX bytes:725362580 (725.3 MB)  TX bytes:155420170 (155.4 MB)
  
  flannel.1 Link encap:Ethernet  HWaddr 12:10:54:76:3e:c4
            inet addr:10.200.50.0  Bcast:0.0.0.0  Mask:255.255.0.0
            inet6 addr: fe80::1410:54ff:fe86:3ec4/64 Scope:Link
            UP BROADCAST RUNNING MULTICAST  MTU:8951  Metric:1
            RX packets:0 errors:0 dropped:0 overruns:0 frame:0
            TX packets:0 errors:0 dropped:11 overruns:0 carrier:0
            collisions:0 txqueuelen:0
            RX bytes:0 (0.0 B)  TX bytes:0 (0.0 B)
  
  lo        Link encap:Local Loopback
            inet addr:127.0.0.1  Mask:255.0.0.0
            inet6 addr: ::1/128 Scope:Host
            UP LOOPBACK RUNNING  MTU:65536  Metric:1
            RX packets:27 errors:0 dropped:0 overruns:0 frame:0
            TX packets:27 errors:0 dropped:0 overruns:0 carrier:0
            collisions:0 txqueuelen:1
            RX bytes:1624 (1.6 KB)  TX bytes:1624 (1.6 KB)
  </code></pre>
  
  <p>How do I ensure that the pod's IP address is derived from the flannel interface?</p>