fix docker k8s

doc/PADDLE_SERVING_ON_KUBERNETES.md

@@ -124,7 +124,7 @@ sh tools/generate_k8s_yamls.sh  --app_name ocr --image_name registry.baidubce.co
 - web service bert示例
 
 ```bash
-sh tools/generate_k8s_yamls.sh  --app_name bert --image_name registry.baidubce.com/paddlepaddle/serving:k8s-web-demo --workdir /home/bert --command "python2.7 bert_web_service.py 9292" --port 9292
+sh tools/generate_k8s_yamls.sh  --app_name bert --image_name registry.baidubce.com/paddlepaddle/serving:k8s-web-demo --workdir /home/bert --command "python3.6 bert_web_service.py bert_seq128_model 9292" --port 9292
 ```
 **需要注意的是，app_name需要同URL的函数名相同。例如示例中bert的访问URL是`https://127.0.0.1:9292/bert/prediction`，那么app_name应为bert。**
 

tools/generate_k8s_yamls.sh

@@ -60,8 +60,8 @@ function run
   echo "named arg: command: $start_command"
   echo "named arg: port: $port"
   
-  sed -e "s/<< APP_NAME >>/$app_name/g" -e "s/<< IMAGE_NAME >>/$(echo $image_name | sed -e 's/\\/\\\\/g; s/\//\\\//g; s/&/\\\&/g')/g" -e "s/<< WORKDIR >>/$(echo $workdir | sed -e 's/\\/\\\\/g; s/\//\\\//g; s/&/\\\&/g')/g" -e "s/<< COMMAND >>/\"$start_command\"/g" -e "s/<< PORT >>/$port/g"  tools/k8s_serving.yaml_template > k8s_serving.yaml
-  sed -e "s/<< APP_NAME >>/$app_name/g" -e "s/<< IMAGE_NAME >>/$(echo $image_name | sed -e 's/\\/\\\\/g; s/\//\\\//g; s/&/\\\&/g')/g" -e "s/<< WORKDIR >>/$(echo $workdir | sed -e 's/\\/\\\\/g; s/\//\\\//g; s/&/\\\&/g')/g" -e "s/<< COMMAND >>/\"$start_command\"/g" -e "s/<< PORT >>/$port/g"  tools/k8s_ingress.yaml_template > k8s_ingress.yaml
+  sed -e "s/<< APP_NAME >>/$app_name/g" -e "s/<< IMAGE_NAME >>/$(echo $image_name | sed -e 's/\\/\\\\/g; s/\//\\\//g; s/&/\\\&/g')/g" -e "s/<< WORKDIR >>/$(echo $workdir | sed -e 's/\\/\\\\/g; s/\//\\\//g; s/&/\\\&/g')/g" -e "s/<< COMMAND >>/\"$(echo $start_command | sed -e 's/\\/\\\\/g; s/\//\\\//g; s/&/\\\&/g')\"/g" -e "s/<< PORT >>/$port/g"  tools/k8s_serving.yaml_template > k8s_serving.yaml
+  sed -e "s/<< APP_NAME >>/$app_name/g" -e "s/<< IMAGE_NAME >>/$(echo $image_name | sed -e 's/\\/\\\\/g; s/\//\\\//g; s/&/\\\&/g')/g" -e "s/<< WORKDIR >>/$(echo $workdir | sed -e 's/\\/\\\\/g; s/\//\\\//g; s/&/\\\&/g')/g" -e "s/<< COMMAND >>/\"$(echo $start_command | sed -e 's/\\/\\\\/g; s/\//\\\//g; s/&/\\\&/g')\"/g" -e "s/<< PORT >>/$port/g"  tools/k8s_ingress.yaml_template > k8s_ingress.yaml
   echo "check k8s_serving.yaml and k8s_ingress.yaml please." 
 }