Stackdriver: Template variables in filters using globbing format

[jameshartig]

We're running Grafana 5.4.3. I created a variable $device that I want to use to filter all of the graphs on the dashboard by a particular device. I set up the template variable as so:

I thought I could then do:

But the graph shows no data points. It looks like it's sending the variable with {} around it:

{"from":"1548983617008","to":"1548994417008","queries":[{"refId":"A","intervalMs":10000,"datasourceId":3,"metricType":"compute.googleapis.com/instance/disk/throttled_write_ops_count","primaryAggregation":"REDUCE_MEAN","perSeriesAligner":"ALIGN_DELTA","alignmentPeriod":"stackdriver-auto","groupBys":["metric.label.device_name"],"view":"FULL","filters":["metric.label.device_name","=~","{william-mongo-sessions-ssd}"],"aliasBy":"{{ metric.label.device_name }}","type":"timeSeriesQuery"}]}

Specifically: ["metric.label.device_name","=~","{william-mongo-sessions-ssd}"] when I believe it should just have been ["metric.label.device_name","=~","william-mongo-sessions-ssd"]

Finally, are variables supported in the template queries? We typically have a hierarchy as so:

Where selecting zone will filter instances and devices. Selecting an instance will filter devices. I don't see a way in the template query page to add a filter.

[torkelo]

Looks like the format is not specified in the replace (interpolation) call:
https://github.com/grafana/grafana/blob/master/public/app/plugins/datasource/stackdriver/datasource.ts#L43

There is a 3rd optional argument to replace that controls how multi-valued variables will be interpolated. Looks like for filters it should be regex and not the default glob syntax.

[daniellee]

It should be possible to chain variables, they should appear in the dropdown list. Here is an example:

[daniellee]

Also, it is possible to change how multi variables are concatenated. Docs here. In your case it would be:

${device:regex}

But fix coming up that changes the default to be regex for filters.