为提高效率，提问时请提供以下信息，问题描述清晰可优先响应。
- 【TiDB 版本】：v3.0.2
- 【问题描述】：启动集tidb集群出现错误，头一天可以正常启动集群，第二天使用 ansible-playbook start.yml，出现如下错误：
192.168.179.112]: Ansible FAILED! => playbook: start.yml; TASK: Check grafana API Key list; message: {“changed”: false, “connection”: “close”, “content”: “{"message":"Invalid username or password"}”, “content_length”: “42”, “content_type”: “application/json; charset=UTF-8”, “date”: “Wed, 25 Dec 2019 02:22:44 GMT”, “json”: {“message”: “Invalid username or password”}, “msg”: “Status code was 401 and not [200]: HTTP Error 401: Unauthorized”, “redirected”: false, “status”: 401, “url”: “http://192.168.179.112:3000/api/auth/keys”}
