On 02/02/2023 06:26, koly li wrote:
Hi,
Currently, node_exporter exposes time series for each cpu core (an
example below), which generates a lot of data in a large cluster (10k
nodes cluster). However, we only care about total cpu usage instead of
usage per core. So is there a way for node_exporter to only
expose aggregated node_cpu_seconds_total?
we also notice there is an discussion here (reduce cardinality of
node_cpu_seconds_total
<https://groups.google.com/g/prometheus-developers/c/tvPCYZYHOYc>),
but it seems no conclusion.
node_cpu_seconds_total{container="node-exporter",cpu="85",endpoint="metrics",hostname="603k09311-9-bjsimu01",instance="10.253.108.171:9100",ip="10.253.108.171",job="node-exporter",mode="system",namespace="product-coc-monitor",pod="coc-monitor-prometheus-node-exporter-c2plp",service="coc-monitor-prometheus-node-exporter",prometheus="product-coc-monitor/coc-prometheus",prometheus_replica="prometheus-coc-prometheus-1"}
9077.24 1675059665571
node_cpu_seconds_total{container="node-exporter",cpu="85",endpoint="metrics",hostname="603k09311-9-bjsimu01",instance="10.253.108.171:9100",ip="10.253.108.171",job="node-exporter",mode="user",namespace="product-coc-monitor",pod="coc-monitor-prometheus-node-exporter-c2plp",service="coc-monitor-prometheus-node-exporter",prometheus="product-coc-monitor/coc-prometheus",prometheus_replica="prometheus-coc-prometheus-1"}
19298.57 1675059665571
node_cpu_seconds_total{container="node-exporter",cpu="86",endpoint="metrics",hostname="603k09311-9-bjsimu01",instance="10.253.108.171:9100",ip="10.253.108.171",job="node-exporter",mode="idle",namespace="product-coc-monitor",pod="coc-monitor-prometheus-node-exporter-c2plp",service="coc-monitor-prometheus-node-exporter",prometheus="product-coc-monitor/coc-prometheus",prometheus_replica="prometheus-coc-prometheus-1"}
1.060892164e+07 1675059665571
node_cpu_seconds_total{container="node-exporter",cpu="86",endpoint="metrics",hostname="603k09311-9-bjsimu01",instance="10.253.108.171:9100",ip="10.253.108.171",job="node-exporter",mode="iowait",namespace="product-coc-monitor",pod="coc-monitor-prometheus-node-exporter-c2plp",service="coc-monitor-prometheus-node-exporter",prometheus="product-coc-monitor/coc-prometheus",prometheus_replica="prometheus-coc-prometheus-1"}
4.37 1675059665571
You can't remove it as far as I'm aware, but you can use a recording
rule to aggregate that data to just give you a metric that represents
the overall CPU usage (not broken down by core/status).
--
Stuart Clark
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