After removing and re-expanding the Grafana node, the dashboard cannot monitor information about PD, KV, TiDB, and other nodes. Do I need to re-add the data source? How do I do it?

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Original topic: grafana节点下掉重新扩容后，dashborad中监控不到pd、kv、tiDB等节点的信息，需要重新添加数据源吗？怎么操作？

| username: xiaoxiaozuofang

[TiDB Usage Environment] Test/
[TiDB Version] tidbv6.1.0
[Reproduction Path] What operations were performed when the issue occurred
[Encountered Issue] After the Grafana node went down and was re-expanded, the dashboard could not monitor information about PD, KV, TiDB, etc. nodes. Do I need to re-add the data source? How to operate?
[Resource Configuration]
[Attachments: Screenshots/Logs/Monitoring]

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| username: songxuecheng | Original post link

Restart Prometheus.

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| username: xiaoxiaozuofang | Original post link

Can the Prometheus node be expanded if its status is down after a restart?

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| username: srstack | Original post link

After running tiup cluster start -R prometheus, check the audit log for errors.