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InfluxDB
Power Real-Time Data Analytics at Scale. Get real-time insights from all types of time series data with InfluxDB. Ingest, query, and analyze billions of data points in real-time with unbounded cardinality.
Check out Victoria Metrics - using this to monitor my single node k3s running on pi. CPU usage is around 3% and RAM usage around 260 MB. I just to basic monitoring though.
I'm monitoring CPU, memory, disk, network usage etc, the basic stuff available from kubernetes metrics via api. I also have a sidecar pod to send CPU temperature via opentsdb endpoint of Victoria Metrics. I run this helm chart which has operator and db - it can be added to grafana as a Prometheus data source.
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