Use:
sudo rm -fr ~/appdata/grafana
git clone https://github.com/ALFinternet/docker-grafana.git ~/appdata/grafana
docker run -d \
--name=promtail \
-v /home/alf/appdata/promtail:/mnt/config \
-v /var/log:/var/log \
--restart unless-stopped \
grafana/promtail:latest
--config.file=/mnt/config/promtail-config.yml
mkdir appdata/grafana
mkdir appdata/grafana/grafana
mkdir appdata/grafana/loki
mkdir appdata/grafana/promtail
sudo chown -R 1000:1000 appdata/grafana
https://alexandre.deverteuil.net/post/syslog-relay-for-loki/ https://www.syslog-ng.com/community/b/blog/posts/sending-logs-from-syslog-ng-to-grafana-loki https://grafana.com/blog/2021/03/23/how-i-fell-in-love-with-logs-thanks-to-grafana-loki/