limits_config.retention_period was set (2160h) but never enforced: the
live config has no compactor block, so retention_enabled is false and
Loki keeps everything (logs from 2026-05-15 are still queryable).
Enable compactor retention (working_directory under the existing
/var/loki PVC, delete_request_store filesystem) and raise the period to
365 days.
Sizing: storage-loki-0 holds 21.3 GiB of 80 GiB after 5.5 months
(~0.13 GiB/day average, ~0.23 GiB/day over 22.-25.10). 365 days at the
recent rate is ~84 GiB, so the PVC may need expanding later
(ceph-block allows volume expansion).
Rendered with chart loki 7.5.0 and checked with
`loki:3.6.11 -verify-config`.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>