title: What is the meaning of ImagePullBackOff status on a Kubernetes pod?
body: <p>I'm trying to run my first kubernetes pod locally.
  I've run the following command (from <a href="http://kubernetes.io/docs/getting-started-guides/docker/" rel="noreferrer">here</a>):</p>
  
  <pre><code>export ARCH=amd64
  docker run -d \
      --volume=/:/rootfs:ro \
      --volume=/sys:/sys:ro \
      --volume=/var/lib/docker/:/var/lib/docker:rw \
      --volume=/var/lib/kubelet/:/var/lib/kubelet:rw \
      --volume=/var/run:/var/run:rw \
      --net=host \
      --pid=host \
      --privileged \
      gcr.io/google_containers/hyperkube-${ARCH}:${K8S_VERSION} \
      /hyperkube kubelet \
          --containerized \
          --hostname-override=127.0.0.1 \
          --api-servers=http://localhost:8080 \
          --config=/etc/kubernetes/manifests \
          --cluster-dns=10.0.0.10 \
          --cluster-domain=cluster.local \
          --allow-privileged --v=2
  </code></pre>
  
  <p>Then, I've trying to run the following:</p>
  
  <pre><code>kubectl create -f ./run-aii.yaml
  </code></pre>
  
  <p><strong>run-aii.yaml:</strong></p>
  
  <pre><code>apiVersion: extensions/v1beta1
  kind: Deployment
  metadata:
    name: aii
  spec:
    replicas: 2
    template:
      metadata:
        labels:
          run: aii
      spec:
        containers:
        - name: aii
          image: aii
          ports:
          - containerPort: 5144
          env:
          - name: KAFKA_IP
            value: kafka
          volumeMounts:
          - mountPath: /root/script
            name: scripts-data
            readOnly: true
          - mountPath: /home/aii/core
            name: core-aii
            readOnly: true
          - mountPath: /home/aii/genome
            name: genome-aii
            readOnly: true
          - mountPath: /home/aii/main
            name: main-aii
            readOnly: true
        - name: kafka
          image: kafkazoo
          volumeMounts:
          - mountPath: /root/script
            name: scripts-data
            readOnly: true
          - mountPath: /root/config
            name: config-data
            readOnly: true
        - name: ws
          image: ws
          ports:
          - containerPort: 3000
        volumes:
        - name: scripts-data
          hostPath:
            path: /home/aii/general/infra/script
        - name: config-data
          hostPath:
            path: /home/aii/general/infra/config
        - name: core-aii
          hostPath: 
            path: /home/aii/general/core
        - name: genome-aii
          hostPath: 
            path: /home/aii/general/genome
        - name: main-aii
          hostPath: 
            path: /home/aii/general/main
  </code></pre>
  
  <p>Now, when I run: <code>kubectl get pods</code>
  I'm getting:</p>
  
  <pre><code>NAME                    READY     STATUS             RESTARTS   AGE
  aii-806125049-18ocr     0/3       ImagePullBackOff   0          52m
  aii-806125049-6oi8o     0/3       ImagePullBackOff   0          52m
  aii-pod                 0/3       ImagePullBackOff   0          23h
  k8s-etcd-127.0.0.1      1/1       Running            0          2d
  k8s-master-127.0.0.1    4/4       Running            0          2d
  k8s-proxy-127.0.0.1     1/1       Running            0          2d
  nginx-198147104-9kajo   1/1       Running            0          2d
  </code></pre>
  
  <p>BTW: <code>docker images</code> return:</p>
  
  <pre><code>REPOSITORY                                 TAG                 IMAGE ID            CREATED             SIZE
  ws                                         latest              fa7c5f6ef83a        7 days ago          706.8 MB
  kafkazoo                                   latest              84c687b0bd74        9 days ago          697.7 MB
  aii                                        latest              bd12c4acbbaf        9 days ago          1.421 GB
  node                                       4.4                 1a93433cee73        11 days ago         647 MB
  gcr.io/google_containers/hyperkube-amd64   v1.2.4              3c4f38def75b        11 days ago         316.7 MB
  nginx                                      latest              3edcc5de5a79        2 weeks ago         182.7 MB
  docker_kafka                               latest              e1d954a6a827        5 weeks ago         697.7 MB
  spotify/kafka                              latest              30d3cef1fe8e        12 weeks ago        421.6 MB
  wurstmeister/zookeeper                     latest              dc00f1198a44        3 months ago        468.7 MB
  centos                                     latest              61b442687d68        4 months ago        196.6 MB
  centos                                     centos7.2.1511      38ea04e19303        5 months ago        194.6 MB
  gcr.io/google_containers/etcd              2.2.1               a6cd91debed1        6 months ago        28.19 MB
  gcr.io/google_containers/pause             2.0                 2b58359142b0        7 months ago        350.2 kB
  sequenceiq/hadoop-docker                   latest              5c3cc170c6bc        10 months ago       1.766 GB
  </code></pre>
  
  <p>why do I get the ImagePullBackOff ??</p>