Node Metrics

Examples for Prometheus focused on Node Level Metrics.

System Load

System Load in Percantage Value:

avg(node_load1{instance="my-instance-name",job="node-exporter"}) /  count(count(node_cpu_seconds_total{instance="my-instance-name",job="node-exporter"}) by (cpu)) * 100

CPU

CPU Utilization:

100 - (avg by(instance) (irate(node_cpu_seconds_total{mode="idle", instance="my-instance-name"}[5m])) * 100) 

Memory

Memory Available in %:

node_memory_MemAvailable_bytes{instance="my-instance-name"} / node_memory_MemTotal_bytes{instance="my-instance-name"} * 100

Memory Pressure:

rate(node_vmstat_pgmajfault{instance="my-instance-name"}[1m])

Disk

Disk Space Available in bytes:

node_filesystem_avail_bytes{instance=~"my-ec2-instance",job=~"node-exporter",mountpoint="/"}

Disk Space Available in Percentage:

(node_filesystem_avail_bytes{mountpoint="/", instance=~"my-ec2-instance"}  * 100) / node_filesystem_size_bytes{mountpoint="/", instance=~"my-ec2-instance"} 

Disk Latencies:

rate(node_disk_read_time_seconds_total{instance="my-instance-name"}[1m]) / rate(node_disk_reads_completed_total{instance="my-instance-name"}[1m])
rate(node_disk_write_time_seconds_total{instance="my-instance-name"}[1m]) / rate(node_disk_writes_completed_total{instance="my-instance-name"}[1m])

Network

Network Trhoughput

irate(node_network_receive_bytes_total{instance="my-instance-name"}[5m]) * 8
irate(node_network_transmit_bytes_total{instance="my-instance-name}[5m]) * 8

Uptime

Node Uptime:

node_time_seconds{instance="my-ec2-instance",job="node-exporter"} - node_boot_time_seconds{instance="my-ec2-instance",job="node-exporter"}