title: kubelet failed with kubelet cgroup driver: "cgroupfs" is different from docker cgroup driver: "systemd"
body: <p>Configuration for <code>cgroup driver</code> is right in <code>/etc/systemd/system/kubelet.service.d/10-kubeadm.conf</code></p>
  
  <pre><code>Environment="KUBELET_CGROUP_ARGS=--cgroup-driver=systemd"
  </code></pre>
  
  <p>I also checked the <code>Environment</code> with cli</p>
  
  <pre><code>$ systemctl show --property=Environment kubelet | cat
  Environment=KUBELET_KUBECONFIG_ARGS=--kubeconfig=/etc/kubernetes/kubelet.conf\x20--require-kubeconfig=true KUBELET_SYSTEM_PODS_ARGS=--pod-manifest-path=/etc/kubernetes/manifests\x20--allow-privileged=true KUBELET_NETWORK_ARGS=--network-plugin=cni\x20--cni-conf-dir=/etc/cni/net.d\x20--cni-bin-dir=/opt/cni/bin KUBELET_DNS_ARGS=--cluster-dns=10.96.0.10\x20--cluster-domain=cluster.local KUBELET_AUTHZ_ARGS=--authorization-mode=Webhook\x20--client-ca-file=/etc/kubernetes/pki/ca.crt KUBELET_CADVISOR_ARGS=--cadvisor-port=0 KUBELET_CGROUP_ARGS=--cgroup-driver=systemd
  </code></pre>
  
  <blockquote>
    <p><strong><code>KUBELET_CGROUP_ARGS=--cgroup-driver=systemd</code></strong></p>
  </blockquote>
  
  <p><strong>How to reproduce it</strong>:</p>
  
  <ul>
  <li>yum install -y docker-1.12.6</li>
  <li>systemctl enable docker &amp;&amp; systemctl start docker</li>
  <li>setenforce 0</li>
  <li>yum install -y kubelet kubeadm</li>
  <li>systemctl enable kubelet &amp;&amp; systemctl start kubelet</li>
  <li>systemctl daemon-reload</li>
  <li>systemctl restart kubelet</li>
  <li>kubelet log</li>
  </ul>
  
  <p><strong>Environment</strong>:</p>
  
  <ul>
  <li>Kubernetes version (use <code>kubectl version</code>): 1.7.3</li>
  <li>Cloud provider or hardware configuration**:   4 core 16G RAM </li>
  <li>OS (e.g. from /etc/os-release):  CentOS Linux 7 (Core)</li>
  <li>Kernel (e.g. <code>uname -a</code>): Linux 10-8-108-92 3.10.0-327.22.2.el7.x86_64 #1 SMP Thu Jun 23 17:05:11 UTC 2016 x86_64 x86_64 x86_64 GNU/Linux</li>
  <li>Install tools: kubeadm</li>
  </ul>