title: Pod in Kubernetes always in pending state
body: <p>I have a problem with Kubernetes that run in a CentOS virtual machine in CloudStack. My pods remain in pending state.
  I got the following error message when I print the log for a pod:</p>
  
  <pre><code>    [root@kubernetes-master ~]# kubectl logs wildfly-rc-6a0fr
      Error from server: Internal error occurred: Pod "wildfly-rc-6a0fr" in namespace "default" : pod is not in 'Running', 'Succeeded' or 'Failed' state - State: "Pending"
  </code></pre>
  
  <p>If I launch describe command on the pod, this is the result:</p>
  
  <pre><code>[root@kubernetes-master ~]# kubectl describe pod wildfly-rc-6a0fr
  Name:               wildfly-rc-6a0fr
  Namespace:          default
  Image(s):           jboss/wildfly
  Node:               kubernetes-minion1/
  Start Time:         Sun, 03 Apr 2016 15:00:20 +0200
  Labels:             name=wildfly
  Status:             Pending
  Reason:             
  Message:            
  IP:             
  Replication Controllers:    wildfly-rc (2/2 replicas created)
  Containers:
    wildfly-rc-pod:
      Container ID:   
      Image:      jboss/wildfly
      Image ID:       
      QoS Tier:
        cpu:      BestEffort
        memory:       BestEffort
      State:      Waiting
      Ready:      False
      Restart Count:  0
      Environment Variables:
  Volumes:
    default-token-0dci1:
      Type:   Secret (a secret that should populate this volume)
      SecretName: default-token-0dci1
  Events:
    FirstSeen LastSeen    Count   From                SubobjectPath               Reason  Message
    ───────── ────────    ─────   ────                ─────────────               ──────  ───────
    8m        8m      1   {kubelet kubernetes-minion1}    implicitly required container POD   Pulled  Container image "registry.access.redhat.com/rhel7/pod-infrastructure:latest" already present on machine
    8m        8m      1   {kubelet kubernetes-minion1}    implicitly required container POD   Created Created with docker id 97c1a3ea4aa5
    8m        8m      1   {kubelet kubernetes-minion1}    implicitly required container POD   Started Started with docker id 97c1a3ea4aa5
    8m        8m      1   {kubelet kubernetes-minion1}    spec.containers{wildfly-rc-pod}     Pulling pulling image "jboss/wildfly"
  </code></pre>
  
  <p>Kubelet has some errors that I print below.Is this possible because of the vm has only 5GB of storage?</p>
  
  <pre><code>systemctl status -l kubelet
  ● kubelet.service - Kubernetes Kubelet Server
     Loaded: loaded (/usr/lib/systemd/system/kubelet.service; enabled; vendor preset: disabled)
     Active: active (running) since lun 2016-04-04 08:08:59 CEST; 9min ago
       Docs: https://github.com/GoogleCloudPlatform/kubernetes
   Main PID: 2112 (kubelet)
     Memory: 39.3M
     CGroup: /system.slice/kubelet.service
             └─2112 /usr/bin/kubelet --logtostderr=true --v=0 --api-servers=http://kubernetes-master:8080 --address=0.0.0.0 --allow-privileged=false --pod-infra-container-image=registry.access.redhat.com/rhel7/pod-infrastructure:latest
  
  apr 04 08:13:33 kubernetes-minion1 kubelet[2112]: W0404 08:13:33.877859    2112 kubelet.go:1690] Orphaned volume "167d0ead-fa29-11e5-bddc-064278000020/default-token-0dci1" found, tearing down volume
  apr 04 08:13:53 kubernetes-minion1 kubelet[2112]: W0404 08:13:53.887279    2112 kubelet.go:1690] Orphaned volume "9f772358-fa2b-11e5-bddc-064278000020/default-token-0dci1" found, tearing down volume
  apr 04 08:14:35 kubernetes-minion1 kubelet[2112]: I0404 08:14:35.341994    2112 provider.go:91] Refreshing cache for provider: *credentialprovider.defaultDockerConfigProvider
  apr 04 08:14:35 kubernetes-minion1 kubelet[2112]: E0404 08:14:35.397168    2112 manager.go:1867] Failed to create pod infra container: impossible: cannot find the mounted volumes for pod "wildfly-rc-oroab_default"; Skipping pod "wildfly-rc-oroab_default"
  apr 04 08:14:35 kubernetes-minion1 kubelet[2112]: E0404 08:14:35.401583    2112 pod_workers.go:113] Error syncing pod 167d0ead-fa29-11e5-bddc-064278000020, skipping: impossible: cannot find the mounted volumes for pod "wildfly-rc-oroab_default"
  apr 04 08:14:58 kubernetes-minion1 kubelet[2112]: E0404 08:14:58.076530    2112 manager.go:1867] Failed to create pod infra container: impossible: cannot find the mounted volumes for pod "wildfly-rc-1aimv_default"; Skipping pod "wildfly-rc-1aimv_default"
  apr 04 08:14:58 kubernetes-minion1 kubelet[2112]: E0404 08:14:58.078292    2112 pod_workers.go:113] Error syncing pod 9f772358-fa2b-11e5-bddc-064278000020, skipping: impossible: cannot find the mounted volumes for pod "wildfly-rc-1aimv_default"
  apr 04 08:15:23 kubernetes-minion1 kubelet[2112]: W0404 08:15:23.879138    2112 kubelet.go:1690] Orphaned volume "56257e55-fa2c-11e5-bddc-064278000020/default-token-0dci1" found, tearing down volume
  apr 04 08:15:28 kubernetes-minion1 kubelet[2112]: E0404 08:15:28.574574    2112 manager.go:1867] Failed to create pod infra container: impossible: cannot find the mounted volumes for pod "wildfly-rc-43b0f_default"; Skipping pod "wildfly-rc-43b0f_default"
  apr 04 08:15:28 kubernetes-minion1 kubelet[2112]: E0404 08:15:28.581467    2112 pod_workers.go:113] Error syncing pod 56257e55-fa2c-11e5-bddc-064278000020, skipping: impossible: cannot find the mounted volumes for pod "wildfly-rc-43b0f_default"
  </code></pre>
  
  <p>Could someone, kindly, help me?
  Thanks in advance.</p>