Beast of Argh is a single pot image with Prometheus, Alertmanager, Loki, Promtail, Grafana and dashboards, plus syslog server, for monitoring and alerting of small environments.
Grafana is a visualisation front-end for data, specifically system metrics.
InfluxDB is a time-series database
Loki is a tool for viewing centralised log data, and extracting alerts and metrics for export to Prometheus
Prometheus is a tool for capturing time series data, specifically system metrics.