title: x509: certificate has expired or is not yet valid
body: <pre><code>kubectl apply -f https://raw.githubusercontent.com/coreos/flannel/master/Documentation/kube-flannel.yml --insecure-skip-tls-verify=true
  </code></pre>
  
  <p>it comes out to get the log below, </p>
  
  <pre><code>Unable to connect to the server: x509: certificate has expired or is not yet valid
  </code></pre>
  
  <p>kubernetes 1.14.0</p>