improve Jenkinsfile

Author: hors

Jenkinsfile

@@ -249,7 +249,7 @@ void runTest(Integer TEST_ID) {
 void prepareNode() {
     sh """
         if [ ! -f /usr/local/bin/kubectl ]; then
-            sudo curl -s -L -o /usr/local/bin/kubectl https://dl.k8s.io/release/\$(curl -L -s https://dl.k8s.io/release/stable.txt)/bin/linux/amd64/kubectl && sudo chmod +x /usr/local/bin/kubectl
+            sudo curl -s -L -o /usr/local/bin/kubectl https://dl.k8s.io/release/\$(curl -L -s https://api.github.com/repos/kubernetes/kubernetes/releases/latest | jq -r .tag_name)/bin/linux/amd64/kubectl && sudo chmod +x /usr/local/bin/kubectl
         fi
 
         kubectl version --client --output=yaml