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Sidecar: use prometheus metrics for min timestamp #7820

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MichaHoffmann
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This PR makes sidecar read "minT" from prometheus metrics instead of the shipper. This has the benefit that it also works for sidecar deployments that do not upload blocks, so that they can be pruned by time range too.

@MichaHoffmann MichaHoffmann force-pushed the mhoffmann/use-prometheus-tsdb-lowest-timestamp-for-mintime-in-sidecar branch from 51c58f7 to 6cff6e2 Compare October 13, 2024 16:56
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@pedro-stanaka pedro-stanaka left a comment

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LG - some typos though.

pkg/promclient/promclient.go Show resolved Hide resolved
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@GiedriusS GiedriusS left a comment

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Why not http://localhost:9090/api/v1/status/tsdb? Should be much faster than gathering all metrics and then parsing them not to mention the overhead of the PromQL engine.

@MichaHoffmann
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Why not http://localhost:9090/api/v1/status/tsdb? Should be much faster than gathering all metrics and then parsing them not to mention the overhead of the PromQL engine

It doesn't have this data for whole tsdb. Only for head

cmd/thanos/sidecar.go Outdated Show resolved Hide resolved
Read "minT" from prometheus metrics so that we also set it for sidecars
that are not uploading blocks.

Signed-off-by: Michael Hoffmann <mhoffm@posteo.de>
@MichaHoffmann MichaHoffmann force-pushed the mhoffmann/use-prometheus-tsdb-lowest-timestamp-for-mintime-in-sidecar branch from 6cff6e2 to c4d1de9 Compare October 16, 2024 16:30
@GiedriusS GiedriusS merged commit 761487c into main Nov 6, 2024
22 checks passed
@GiedriusS GiedriusS deleted the mhoffmann/use-prometheus-tsdb-lowest-timestamp-for-mintime-in-sidecar branch November 6, 2024 13:00
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3 participants