Fail to run mimirtool analyze grafana, with error unmarshal board: json

[jovezhong]

Describe the bug

A clear and concise description of what the bug is.

I was trying to follow https://grafana.com/docs/grafana-cloud/metrics-control-usage/control-prometheus-metrics-usage/usage-analysis-mimirtool/ to reduce the unused metrics

However when I downloaded the CLI on my Mac and ran it
./mimirtool-darwin-amd64 analyze grafana --address=https://a.grafana.net --key=eyJrIjoiN..

I got errors

unmarshal board: json: cannot unmarshal object into Go struct field Board.panels of type string for ..
unmarshal board: json: cannot unmarshal object into Go struct field Board.panels of type string for RwmMppyP3 Docker
unmarshal board: json: cannot unmarshal object into Go struct field Board.panels of type string for ..
unmarshal board: json: cannot unmarshal object into Go struct field Board.panels of type string for BJoCSSY7k Node Exporter / Nodes

To Reproduce

Grafana Cloud

mimirtool-darwin-amd64

[pracucci]

Could you share the dashboard JSON in a gist, making sure it doesn't contain any sensitive data, please? I would like to reproduce it.

[biandopa]

I'm having the same problem and some of my dashboards are empty

[ranjitburgute]

I am also facing the same issue while trying to filter out metrics used in nginx.json to configure metrics allowlist.

nginx dashboard file: https://github.com/kubernetes/ingress-nginx/blob/main/deploy/grafana/dashboards/nginx.json
tested with mimirtool v2.1.0
command: mimirtool analyze dashboard nginx.json
error: json: cannot unmarshal object into Go struct field Board.panels of type string for nginx.json

[gmintoco]

I am getting the same error with the MySQL mixin (and a whole bunch of other dashboards that we made internally): https://github.com/prometheus/mysqld_exporter/blob/main/mysqld-mixin/dashboards/mysql-overview.json

Running Grafana v8.5.3 (409e9bc9a5) and trying to incorporate mimirtool analyse into our CI pipelines to automatically adjust the amount of metrics pushed based on dashboards

[hjet]

Closing this issue tentatively as #1973 should fix this.

Please open a new issue and attach a sample dashboard failure case if you encounter any further errors.

@gmintoco and @ranjitburgute I tested the fix on your provided dashboards, thanks for providing those!

Note that until the next release gets cut, you will have to build mimirtool yourself:

go build ./cmd/mimirtool