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Update GCP stackdriver doc with aggregation information #776

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merged 4 commits into from
Jun 29, 2022
Merged

Update GCP stackdriver doc with aggregation information #776

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bb4f70c
Update GCP stackdriver doc with aggregation information
RamCohen Jun 8, 2022
b33bd26
Add aggregation perameters to parameters list
RamCohen Jun 8, 2022
247fdc2
Update reduce count false/true specifiers
RamCohen Jun 9, 2022
31f3102
Add quotes around alignmentPeriodSeconds
RamCohen Jun 14, 2022
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12 changes: 12 additions & 0 deletions content/docs/2.7/scalers/gcp-stackdriver.md
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Expand Up @@ -19,6 +19,9 @@ triggers:
filter: 'metric.type="storage.googleapis.com/network/received_bytes_count" AND resource.type="gcs_bucket" AND metric.label.method="WriteObject" AND resource.label.bucket_name="my-gcp-bucket"'
targetValue: '100'
credentialsFromEnv: GOOGLE_APPLICATION_CREDENTIALS_JSON
alignmentPeriodSeconds: 60
alignmentAligner: mean
alignmentReducer: none
```

**Parameter list:**
Expand All @@ -29,6 +32,15 @@ triggers:

The `credentialsFromEnv` property maps to the name of an environment variable in the scale target (`scaleTargetRef`) that contains the service account credentials (JSON). KEDA will use those to connect to Google Cloud Platform and collect the configured stack driver metrics.

### Timeseries alignment properties
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It is much better to aggregate the time series values before they are returned from stackdriver instead of getting the raw values.
For that, you must specify a value of 60 or more for the `alignmentPeriodSeconds` property as well as an alignment operation in the `alignmentAligner` property and/or a reducer in the `alignmentReducer` property.

Valid values for the `alignmentAligner` property are: none, delta, interpolate, next_older, min, max, mean, count, sum, stddev, count_true, count_false, fraction_true, percentile_99, percentile_95, percentile_50, percentile_05 and percent_change.
Valid values for the `alignmentReducer` property are: none, mean, min, max, sum, stddev, true, false, fraction_true, percentile_99, percentile_95, percentile_50 and percentile_05.

For more information on aggregation, see [here](https://cloud.google.com/monitoring/api/v3/aggregation#aggr-intro).

### Authentication Parameters
You can use `TriggerAuthentication` CRD to configure the authenticate by providing the service account credentials in JSON.

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