Azure Monitor template variables
Instead of hard-coding details such as resource group or resource name values in metric queries, you can use variables. This helps you create more interactive, dynamic, and reusable dashboards. Grafana refers to such variables as template variables.
For an introduction to templating and template variables, refer to the Templating and Add and manage variables documentation.
Use query variables
You can specify these Azure Monitor data source queries in the Variable edit view’s Query Type field.
Note
Custom metrics cannot be emitted against a subscription or resource group. Select resources only when you need to retrieve custom metric namespaces or custom metric names associated with a specific resource.
You can use any Log Analytics Kusto Query Language (KQL) query that returns a single list of values in the Query
field.
For example:
Query variable example
This time series query uses query variables:
Perf
| where ObjectName == "$object" and CounterName == "$metric"
| where TimeGenerated >= $__timeFrom() and TimeGenerated <= $__timeTo()
| where $__contains(Computer, $computer)
| summarize avg(CounterValue) by bin(TimeGenerated, $__interval), Computer
| order by TimeGenerated asc
Multi-value variables
It is possible to select multiple values for Resource Groups and Resource Names and use a single metrics query pointing to those values as long as they:
- Belong to the same subscription.
- Are in the same region.
- Are of the same type (namespace).
Also, note that if a template variable pointing to multiple resource groups or names is used in another template variable as a parameter (e.g. to retrieve metric names), only the first value will be used. This means that the combination of the first resource group and name selected should be valid.