grafana - 监控服务器资源使用状态

一、监控cup当前使用状态

可以用来监控服务器是否挂了,如果低于0.5的水平线即可报警
查询cpu每秒使用率,以最近5分钟为单位

//legend -  Busy System
sum by (node_exporter)(rate(node_cpu_seconds_total{job='node_exporter',mode ='system'}[5m])) 

//legend -  Busy User
sum by (node_exporter)(rate(node_cpu_seconds_total{job='node_exporter',mode ='user'}[5m])) 

//legend -  Busy Iowait
sum by (node_exporter)(rate(node_cpu_seconds_total{job='node_exporter',mode ='iowait'}[5m])) 

//legend -  Busy IRQs
sum by (node_exporter)(rate(node_cpu_seconds_total{job='node_exporter',mode=~'.*irq'}[5m])) 

//legend -  Busy Others
sum by (node_exporter) (rate(node_cpu_seconds_total{job = 'node_exporter',mode!='idle',mode!='user',mode!='system',mode!='iowait',mode!='irq',mode!='softirq'}[5m]))

//legend -  Idle
sum by (node_exporter)(rate(node_cpu_seconds_total{job='node_exporter',mode ='idle'}[5m])) 

cpu报警设置:
根据机器配置决定,如Busy User 指标IS ABOVE 240,IS BELOW 0.5即可报警

image.png

二、监控内存使用状态

监控服务器的内存标准

//监控服务器总的内存大小
node_memory_MemTotal_bytes{job = 'node_exporter'}

//监控服务器已使用的内存大小
node_memory_MemTotal_bytes{job = 'node_exporter'} - node_memory_MemFree_bytes{job = 'node_exporter'}
- node_memory_Cached_bytes{job = 'node_exporter'} - node_memory_Buffers_bytes{job = 'node_exporter'}

//监控服务器RAM  Cache + Buffer内存大小
node_memory_Cached_bytes{job = 'node_exporter'} + node_memory_Buffers_bytes{job = 'node_exporter'}

//监控服务器Free内存大小
node_memory_MemFree_bytes{job="node_exporter"}

//监控服务器SWAP Used内存大小
(node_memory_SwapTotal_bytes{job="node_exporter"} - node_memory_SwapFree_bytes{job="node_exporter"})

image.png

未完待续......