In one of our older istio installations(v1.1.8) the grafana istio service dashboard has no data. However few other dashboards do have data.
Grafana pod logs is filled with
2020/07/08 07:17:54 http: proxy error: context canceled
t=2020-07-08T07:17:54+0000 lvl=info msg=“Request Completed” logger=context userId=1 orgId=1 uname=admin method=GET path=/api/datasources/proxy/1/api/v1/query_range status=502 remote_addr=192.168.9.120 time_ms=1501 size=0 referer=https://example.com/d/LJ_uJAvmk/istio-service-dashboard
and telemetry pods logs
2020-07-08T09:50:36.017416Z error api Report failed: 1 error occurred:
- failed to report all values: 4 errors occurred:
- could not find metric info from adapter config for requestcount.instance.istio-system
- could not find metric info from adapter config for requestduration.instance.istio-system
- could not find metric info from adapter config for requestsize.instance.istio-system
- could not find metric info from adapter config for responsesize.instance.istio-system