Note:
This topic has been translated from a Chinese forum by GPT and might contain errors.
Original topic: TiUniManager部署需要在一台非TiDB集群的节点吗 出现ssh连接不上的问题
[Test Environment for TiDB]
[TiDB Version] v6.1.2
[Encountered Issue: Problem Description and Impact]
As stated in the title, during the startup process of TiUniManager on a cluster composed of TiDB, TiKV, and PD deployed using TIUP on 3 servers, there is an issue with SSH connectivity.
The tidb user has been configured with tidb ALL=(ALL) NOPASSWD: ALL
SSH passwordless login is possible from the command line on the local machine.
Additionally, there is another question. In the configuration, you can add an existing external ES cluster using the parameter external_elasticsearch_url. Do other components, such as monitoring_servers and grafana_servers, have similar parameters? Because there is already another complete set of Grafana, Prometheus, Alertmanager, and Node Exporter.
It doesn’t seem to be an SSH issue; the command execution failed.
Try logging in manually and restarting nginx to see if it helps.
It is recommended to manually test whether the command can be executed before checking SSH connectivity.
No need, you can reuse the machine.
nginx: [emerg] no host in upstream “/” in /em-deploy/nginx-4180/conf/nginx.conf:73
There is indeed a problem.
The issue has been resolved. Previously, the Grafana configuration was commented out.
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