Details
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Type:
Story
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Status: Resolved (View Workflow)
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Priority:
Minor
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Resolution: Fixed
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Affects Version/s: None
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Fix Version/s: 27.0.1
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Component/s: Timeseries
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Security Level: Default (Default Security Scheme)
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Labels:
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Sprint:Horizon 2020 - Sept 30-Oct 14, Horizon 2020 - Oct 14-Oct 28, Horizon 2020 - Oct 28-Nov 11, Horizon 2020 - Nov 11-Nov 24
Description
During testing of the Cortex plugin it turned out that we only get the most recent data back.
It seems that this is due to the fact that we query the Ingester which return only data from memory (which i the most recent data).
Instead we should use the REST API:
https://prometheus.io/docs/prometheus/latest/querying/api/#instant-queries
There was already some work done connecting to the REST API: https://github.com/OpenNMS/opennms-cortex-tss-plugin/blob/master/plugin/src/main/java/org/opennms/timeseries/cortex/CortexTSS.java#L192
See also the following discussion with an in depth description of the issue: https://opennms.discourse.group/t/historical-time-series-data-is-incomplete-when-cortex-is-used/1491
