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Alexey Artamonov a7b5077da2 fix(postgres): floor the lag-brake frozen term so a KSM gap can't empty the query

The read-load query's base term is floored with `or vector(0)`, but the
replication-lag brake's frozen additive term (count(kube_pod_labels) * target)
was not. PromQL `+` is a set intersection, so if count(kube_pod_labels) is
momentarily empty — a kube-state-metrics scrape gap or KSM rollout — the frozen
term is empty and the whole `base + frozen*braking` sum collapses to empty,
defeating the base term's own graceful degradation. KEDA's prometheus scaler
(ignoreNullValues: true by default) then reads that as 0 and pins desired to
minReplicaCount, ignoring real read load exactly when metrics are flaky. This
hits the default config (maxReplicationLagSeconds: 30, brake active). Floor the
frozen summand with `or vector(0)` so base + 0 = base, and assert the floor in
the lag-brake unittest.

Signed-off-by: Alexey Artamonov <aleksei.artamonov@aenix.io>

2026-09-04 23:18:47 +03:00

autoscaling_keda_guard_test.yaml

fix(postgres): fail closed when autoscaling is enabled without KEDA, guard target

2026-09-04 23:18:47 +03:00

autoscaling_test.yaml

fix(postgres): floor the lag-brake frozen term so a KSM gap can't empty the query

2026-09-04 23:18:47 +03:00

backup_storage_test.yaml

fix(postgres): let in-place restore re-bootstrap instead of wedging

2026-08-25 17:31:53 +04:00

backup_test.yaml

fix(backups): migrate CNPG backups to the barman-cloud plugin