Anyone know more lightweight alternative to (ELK) Elastic Stack? I found https://vector.dev but it seems to be only the "L" part.

Promtail/Loki https://github.com/grafana/loki is an alternative to elk, but while it seems more lightweight, it definitely is less featureful. The integration with grafana/prometheus seems nice, but I've only toyed with it, not used in production.