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stackdriver: improve filter docs for wildcards and regular expressions

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Erik Sundell 2018-10-08 12:01:11 +02:00
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1 changed files with 8 additions and 2 deletions
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docs/sources/features/datasources/stackdriver.md
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@ -76,9 +76,15 @@ Choose a metric from the `Metric` dropdown.
### Filter
To add a filter, click the plus icon and choose a field to filter by and enter a filter value e.g. `instance_name = grafana-1`
To add a filter, click the plus icon and choose a field to filter by and enter a filter value e.g. `instance_name = grafana-1`. You can remove the filter by clicking on the filter name and select `--remove filter--`.
It is also possible to add wildcards to the filter value field. E.g `us-*` to capture all values that starts with "us-", `*central-a` to capture all that ends with "central-a". `*-central-*` captures values that has the substring of -central-.
#### Simple wildcards
When the operator is set to `=` or `!=` it is possible to add wildcards to the filter value field. E.g `us-*` will capture all values that starts with "us-" and `*central-a` will capture all values that ends with "central-a". `*-central-*` captures all values that has the substring of -central-. Simple wildcards are less expensive than regular expressions.
#### Regular expressions
When the operator is set to `=~` or `!=~` it is possible to add regular expressions to the filter value field. E.g `us-central[1-3]-[af]` would match all values that starts with "us-central", is followed by a number in the range of 1 to 3, a dash and then either an "a" or an "f". Leading and trailing slashes are not needed when creating regular expressions.
### Aggregation