- Made the experimental PromQL editor the default UI, added exemplar display and a startup progress screen.
- Introduced new service discovery options (Linode, generic HTTP, Kubernetes kubeconfig, Consul namespace) and several SD enhancements like ingress class labeling and a target‑creation‑failure counter.
- Added various enhancements (promtool silencing, externalURL templating, scrape body‑size limit, TSDB validation/metrics) and fixed bugs in the PromQL editor, TSDB chunk merging, and SD metrics.
2.28.0 / 2021-06-21
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