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Add Query Frontend Module #400

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merged 10 commits into from
Jan 4, 2021
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@annanay25 annanay25 commented Dec 8, 2020

Signed-off-by: Annanay annanayagarwal@gmail.com

What this PR does:

  • Introduces a Query Frontend component which will be useful to scale the query path. It vendors and reuses the Cortex Query Frontend that allows for streaming queries to and from the querier.
  • The Querier now serves the /querier/api/traces/{traceID} endpoint; and the main handler for /api/traces/{traceID} is now registered with the Query Frontend.
  • The Querier now uses a worker which streams queries & responses with the Query Frontend(s). In single binary mode, no configuration changes will be required to run. In microservices mode, the querier needs to now be supplied with the address of the Query Frontend service so it can process queries.
  • New flags that will now appear
  -querier.frontend-address string
    	Address of query frontend service, in host:port format.

Follow up of #375

Which issue(s) this PR fixes:
Fixes

Checklist

  • Tests updated
  • Documentation added
  • CHANGELOG.md updated - the order of entries should be [CHANGE], [FEATURE], [ENHANCEMENT], [BUGFIX]

Signed-off-by: Annanay <annanayagarwal@gmail.com>
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Signed-off-by: Annanay <annanayagarwal@gmail.com>
Signed-off-by: Annanay <annanayagarwal@gmail.com>
Signed-off-by: Annanay <annanayagarwal@gmail.com>
Signed-off-by: Annanay <annanayagarwal@gmail.com>
Signed-off-by: Annanay <annanayagarwal@gmail.com>
Signed-off-by: Annanay <annanayagarwal@gmail.com>
Signed-off-by: Annanay <annanayagarwal@gmail.com>
Signed-off-by: Annanay <annanayagarwal@gmail.com>
@annanay25 annanay25 changed the title WIP - Add Query Frontend Module Add Query Frontend Module Dec 16, 2020
@annanay25 annanay25 marked this pull request as ready for review December 16, 2020 11:01
Signed-off-by: Annanay <annanayagarwal@gmail.com>
@annanay25 annanay25 merged commit bc11b55 into grafana:master Jan 4, 2021
@annanay25 annanay25 deleted the query-frontend branch January 5, 2021 07:14
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3 participants