新增learn-kubernetes（https://github.com/yyong-brs/learn-kubernetes）相关文件

learn/learn-kubernetes-master/kiamol/ch21/add-todo-to-hosts.sh

@@ -0,0 +1,10 @@
+#!/bin/sh
+
+CONTROLLER='ingress-nginx-controller'
+NS='kiamol-ingress-nginx'
+IP=$(kubectl get svc $CONTROLLER -o jsonpath='{.status.loadBalancer.ingress[0].*}' -n $NS)
+if [ "$IP" = "localhost" ]; then 
+    IP='127.0.0.1'
+fi
+
+echo "\n$IP  todo.kiamol.local\n$IP  api.todo.kiamol.local" | sudo tee -a /etc/hosts