bac1960330
This patch proposes a method for operators to customize the aggregation query executed against Gnocchi. By default, we use the following query: (aggregate RE_AGGREGATION_METHOD (metric METRIC_NAME AGGREGATION_METHOD)) Therefore, this option enables operators to take full advantage of operations available in Gnocchi, such as any arithmetic operations, logical operations and many others. When using a custom aggregation query, one can use the placeholders `RE_AGGREGATION_METHOD`, `AGGREGATION_METHOD`, and `METRIC_NAME`: they will be replaced at runtime by values from the metric configuration. Different use cases can be addressed with the use of custom queries such as handling RadosGW usage data trimming, which causes a decrease in the usage data values; Libvirt attach/detach of disks, migration of VMs, start/stop of VMs, which will zero the usage data that are gathered by Ceilometer compute, and many other use cases where one might desire a more complex operation to be executed on the data before CloudKitty rates it. Change-Id: I3419075d6df165409cb1375ad11a5b3f7faa7471
8 lines
262 B
YAML
8 lines
262 B
YAML
---
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features:
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Enable using custom queries with the Gnocchi collector. This option enables
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operators to take full advantage of the operations that are available on
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Gnocchi such as any arithmetic operation, logical operation and many
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others.
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