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Export last replay age in replication collector #1085

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Export last replay age in replication collector #1085

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Commits on Nov 12, 2024

  1. Export last replay age in replication collector 

    The exported replication lag does not handle all failure modes, and can
report 0 for replicas that are out of sync and incapable of recovery.

A proper replacement for that metric would require a different approach
(see e.g. prometheus-community#1007), but for a lot of folks, simply exporting the age of
the last replay can provide a pretty strong signal for something being
amiss.

I think this solution might be preferable to prometheus-community#977, though the lag
metric needs to be fixed or abandoned eventually.

Signed-off-by: Conrad Hoffmann <[email protected]>
    @bitfehler
    bitfehler committed Nov 12, 2024
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