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120 lines
4.7 KiB
120 lines
4.7 KiB
{
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prometheusRules+:: {
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groups+: [
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{
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name: 'node-exporter.rules',
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rules: [
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{
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// This rule gives the number of CPUs per node.
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record: 'instance:node_num_cpu:sum',
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expr: |||
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count without (cpu, mode) (
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node_cpu_seconds_total{%(nodeExporterSelector)s,mode="idle"}
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)
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||| % $._config,
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},
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{
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// CPU utilisation is % CPU without {idle,iowait,steal}.
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record: 'instance:node_cpu_utilisation:rate%(rateInterval)s' % $._config,
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expr: |||
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1 - avg without (cpu) (
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sum without (mode) (rate(node_cpu_seconds_total{%(nodeExporterSelector)s, mode=~"idle|iowait|steal"}[%(rateInterval)s]))
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)
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||| % $._config,
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},
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{
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// This is CPU saturation: 1min avg run queue length / number of CPUs.
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// Can go over 1.
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// TODO: There are situation where a run queue >1/core is just normal and fine.
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// We need to clarify how to read this metric and if its usage is helpful at all.
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record: 'instance:node_load1_per_cpu:ratio',
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expr: |||
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(
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node_load1{%(nodeExporterSelector)s}
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/
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instance:node_num_cpu:sum{%(nodeExporterSelector)s}
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)
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||| % $._config,
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},
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{
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// Memory utilisation (ratio of used memory per instance).
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record: 'instance:node_memory_utilisation:ratio',
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expr: |||
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1 - (
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(
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node_memory_MemAvailable_bytes{%(nodeExporterSelector)s}
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or
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(
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node_memory_Buffers_bytes{%(nodeExporterSelector)s}
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+
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node_memory_Cached_bytes{%(nodeExporterSelector)s}
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+
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node_memory_MemFree_bytes{%(nodeExporterSelector)s}
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+
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node_memory_Slab_bytes{%(nodeExporterSelector)s}
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)
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)
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/
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node_memory_MemTotal_bytes{%(nodeExporterSelector)s}
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)
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||| % $._config,
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},
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{
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record: 'instance:node_vmstat_pgmajfault:rate%(rateInterval)s' % $._config,
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expr: |||
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rate(node_vmstat_pgmajfault{%(nodeExporterSelector)s}[%(rateInterval)s])
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||| % $._config,
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},
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{
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// Disk utilisation (seconds spent, 1 second rate).
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record: 'instance_device:node_disk_io_time_seconds:rate%(rateInterval)s' % $._config,
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expr: |||
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rate(node_disk_io_time_seconds_total{%(nodeExporterSelector)s, %(diskDeviceSelector)s}[%(rateInterval)s])
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||| % $._config,
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},
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{
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// Disk saturation (weighted seconds spent, 1 second rate).
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record: 'instance_device:node_disk_io_time_weighted_seconds:rate%(rateInterval)s' % $._config,
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expr: |||
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rate(node_disk_io_time_weighted_seconds_total{%(nodeExporterSelector)s, %(diskDeviceSelector)s}[%(rateInterval)s])
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||| % $._config,
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},
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{
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record: 'instance:node_network_receive_bytes_excluding_lo:rate%(rateInterval)s' % $._config,
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expr: |||
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sum without (device) (
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rate(node_network_receive_bytes_total{%(nodeExporterSelector)s, device!="lo"}[%(rateInterval)s])
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)
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||| % $._config,
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},
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{
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record: 'instance:node_network_transmit_bytes_excluding_lo:rate%(rateInterval)s' % $._config,
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expr: |||
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sum without (device) (
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rate(node_network_transmit_bytes_total{%(nodeExporterSelector)s, device!="lo"}[%(rateInterval)s])
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)
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||| % $._config,
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},
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// TODO: Find out if those drops ever happen on modern switched networks.
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{
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record: 'instance:node_network_receive_drop_excluding_lo:rate%(rateInterval)s' % $._config,
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expr: |||
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sum without (device) (
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rate(node_network_receive_drop_total{%(nodeExporterSelector)s, device!="lo"}[%(rateInterval)s])
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)
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||| % $._config,
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},
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{
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record: 'instance:node_network_transmit_drop_excluding_lo:rate%(rateInterval)s' % $._config,
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expr: |||
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sum without (device) (
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rate(node_network_transmit_drop_total{%(nodeExporterSelector)s, device!="lo"}[%(rateInterval)s])
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)
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||| % $._config,
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},
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],
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},
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],
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},
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}
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