title: FailedCreatePodSandBox & kubelet, $(Slave name) Pod sandbox changed, it will be killed and re-created
body: <p>I am running a kubernetes cluter with 6 nodes (cluser-master &amp; kubernetes slave0-4) on "Bionic Beaver"ubuntu and I'm using Weave
  To install kubernetes I followed <a href="https://vitux.com/install-and-deploy-kubernetes-on-ubuntu/" rel="nofollow noreferrer">https://vitux.com/install-and-deploy-kubernetes-on-ubuntu/</a> and installed weave after installing whatever was reccommended here after clean removing it(it doesn't show up in my pods anymore)</p>
  
  <p><code>kubectl get pods --all-namespaces</code> returns:</p>
  
  <pre><code>NAMESPACE     NAME                                     READY   STATUS              RESTARTS   AGE
  kube-system   coredns-fb8b8dccf-g8psp                  0/1     ContainerCreating   0          77m
  kube-system   coredns-fb8b8dccf-pbfr7                  0/1     ContainerCreating   0          77m
  kube-system   etcd-cluster-master                      1/1     Running             5          77m
  kube-system   kube-apiserver-cluster-master            1/1     Running             5          77m
  kube-system   kube-controller-manager-cluster-master   1/1     Running             5          77m
  kube-system   kube-proxy-72s98                         1/1     Running             5          73m
  kube-system   kube-proxy-cqmdm                         1/1     Running             3          63m
  kube-system   kube-proxy-hgnpj                         1/1     Running             0          69m
  kube-system   kube-proxy-nhjdc                         1/1     Running             5          72m
  kube-system   kube-proxy-sqvdd                         1/1     Running             5          77m
  kube-system   kube-proxy-vmg9k                         1/1     Running             0          70m
  kube-system   kube-scheduler-cluster-master            1/1     Running             5          76m
  kube-system   kubernetes-dashboard-5f7b999d65-p7clv    0/1     ContainerCreating   0          61m
  kube-system   weave-net-2brvt                          2/2     Running             0          69m
  kube-system   weave-net-5wlks                          2/2     Running             16         72m
  kube-system   weave-net-65qmd                          2/2     Running             16         73m
  kube-system   weave-net-9x8cz                          2/2     Running             9          63m
  kube-system   weave-net-r2nhz                          2/2     Running             15         75m
  kube-system   weave-net-stq8x                          2/2     Running             0          70m
  </code></pre>
  
  <p>and if I go with <code>kubectl describe $(kube dashboard pod name) --namespace=kube-system</code> it returns:</p>
  
  <pre><code>NAME                                    READY   STATUS              RESTARTS   AGE
  kubernetes-dashboard-5f7b999d65-p7clv   0/1     ContainerCreating   0          64m
  rock64@cluster-master:~$
  rock64@cluster-master:~$ kubectl describe pods kubernetes-dashboard-5f7b999d65-p7clv --namespace=kube-system
  Name:               kubernetes-dashboard-5f7b999d65-p7clv
  Namespace:          kube-system
  Priority:           0
  PriorityClassName:  &lt;none&gt;
  Node:               kubernetes-slave1/10.0.0.215
  Start Time:         Sun, 14 Apr 2019 10:20:42 +0000
  Labels:             k8s-app=kubernetes-dashboard
                      pod-template-hash=5f7b999d65
  Annotations:        &lt;none&gt;
  Status:             Pending
  IP:
  Controlled By:      ReplicaSet/kubernetes-dashboard-5f7b999d65
  Containers:
    kubernetes-dashboard:
      Container ID:
      Image:         k8s.gcr.io/kubernetes-dashboard-amd64:v1.10.1
      Image ID:
      Port:          8443/TCP
      Host Port:     0/TCP
      Args:
        --auto-generate-certificates
      State:          Waiting
        Reason:       ContainerCreating
      Ready:          False
      Restart Count:  0
      Liveness:       http-get https://:8443/ delay=30s timeout=30s period=10s #success=1 #failure=3
      Environment:    &lt;none&gt;
      Mounts:
        /certs from kubernetes-dashboard-certs (rw)
        /tmp from tmp-volume (rw)
        /var/run/secrets/kubernetes.io/serviceaccount from kubernetes-dashboard-token-znrkr (ro)
  Conditions:
    Type              Status
    Initialized       True
    Ready             False
    ContainersReady   False
    PodScheduled      True
  Volumes:
    kubernetes-dashboard-certs:
      Type:        Secret (a volume populated by a Secret)
      SecretName:  kubernetes-dashboard-certs
      Optional:    false
    tmp-volume:
      Type:       EmptyDir (a temporary directory that shares a pod's lifetime)
      Medium:
      SizeLimit:  &lt;unset&gt;
    kubernetes-dashboard-token-znrkr:
      Type:        Secret (a volume populated by a Secret)
      SecretName:  kubernetes-dashboard-token-znrkr
      Optional:    false
  QoS Class:       BestEffort
  Node-Selectors:  &lt;none&gt;
  Tolerations:     node-role.kubernetes.io/master:NoSchedule
                   node.kubernetes.io/not-ready:NoExecute for 300s
                   node.kubernetes.io/unreachable:NoExecute for 300s
  Events:
    Type     Reason                  Age                     From                        Message
    ----     ------                  ----                    ----                        -------
    Normal   Scheduled               64m                     default-scheduler           Successfully assigned kube-system/kubernetes-dashboard-5f7b999d65-p7clv to kubernetes-slave1
    Warning  FailedCreatePodSandBox  64m                     kubelet, kubernetes-slave1  Failed create pod sandbox: rpc error: code = Unknown desc = [failed to set up sandbox container "4e6d9873f49a02e86cef79e338ce97162291897b2aaad1ddb99c5e066ed42178" network for pod "kubernetes-dashboard-5f7b999d65-p7clv": NetworkPlugin cni failed to set up pod "kubernetes-dashboard-5f7b999d65-p7clv_kube-system" network: failed to find plugin "loopback" in path [/opt/cni/bin], failed to clean up sandbox container "4e6d9873f49a02e86cef79e338ce97162291897b2aaad1ddb99c5e066ed42178" network for pod "kubernetes-dashboard-5f7b999d65-p7clv": NetworkPlugin cni failed to teardown pod "kubernetes-dashboard-5f7b999d65-p7clv_kube-system" network: failed to find plugin "portmap" in path [/opt/cni/bin]]
    Normal   SandboxChanged          59m (x25 over 64m)      kubelet, kubernetes-slave1  Pod sandbox changed, it will be killed and re-created.
    Normal   SandboxChanged          49m (x18 over 53m)      kubelet, kubernetes-slave1  Pod sandbox changed, it will be killed and re-created.
    Normal   SandboxChanged          46m (x13 over 48m)      kubelet, kubernetes-slave1  Pod sandbox changed, it will be killed and re-created.
    Normal   SandboxChanged          24m (x94 over 44m)      kubelet, kubernetes-slave1  Pod sandbox changed, it will be killed and re-created.
    Normal   SandboxChanged          4m12s (x26 over 9m52s)  kubelet, kubernetes-slave1  Pod sandbox changed, it will be killed and re-created.```
  </code></pre>