- What Grafana version and what operating system are you using?
$ uname -r
$ cat /etc/redhat-release
Red Hat Enterprise Linux Server release 7.6 (Maipo)
$ rpm -qa grafana
$ rpm -qa influxdb
$ rpm -qa nginx
When the user selects the ‘All’ filter on our dashboards, most queries fail and we get this error: 502 - Bad Gateway in Grafana. If it refreshes the page, the errors disappear and the dashboards work. We use an nginx as a reverse proxy and imagine that the problem is linked to URI size or headers. We made an attempt to increase the buffers: large_client_header_buffers 32 1024k. A second attempt was to change the InfluxDB method from GET to POST. Errors have diminished, but they still happen constantly. Our configuration uses nginx + Grafana + InfluxDB.
What did you expect to happen?
That the dashboards were consulted normally, without the need to refresh the page.