4.3.3. node_exporter¶

github [1]

安装:

VERSION="0.18.1"   // 20200118最新版
wget https://github.com/prometheus/node_exporter/releases/download/v$PROMETHEUS_VERSION/node_exporter-$VERSION.linux-amd64.tar.gz -O /tmp/node_exporter-$PROMETHEUS_VERSION.linux-amd64.tar.gz
tar -xvzf /tmp/node_exporter-$PROMETHEUS_VERSION.linux-amd64.tar.gz --directory /tmp/ --strip-components=1

$ /tmp/node_exporter --version

常用查询语句:

CPU 使用率:
100 - (avg by (instance) (irate(node_cpu{instance="xxx", mode="idle"}[5m])) * 100)

CPU 各 mode 占比率
avg by (instance, mode) (irate(node_cpu{instance="xxx"}[5m])) * 100

机器平均负载
node_load1{instance="xxx"} // 1分钟负载
node_load5{instance="xxx"} // 5分钟负载
node_load15{instance="xxx"} // 15分钟负载

内存使用率
100 - ((
  node_memory_MemFree{instance="xxx"}+
  node_memory_Cached{instance="xxx"}+
  node_memory_Buffers{instance="xxx"}
)/node_memory_MemTotal) * 100

磁盘使用率
100 -
node_filesystem_free_bytes{instance="xxx",fstype!~"rootfs|selinuxfs|autofs|rpc_pipefs|tmpfs|udev|none|devpts|sysfs|debugfs|fuse.*"} /
node_filesystem_size_bytes{instance="xxx",fstype!~"rootfs|selinuxfs|autofs|rpc_pipefs|tmpfs|udev|none|devpts|sysfs|debugfs|fuse.*"} * 100

网络 IO:
// 上行带宽
sum by (instance) (irate(node_network_receive_bytes{instance="xxx",device!~"bond.*?|lo"}[5m])/128)
// 下行带宽
sum by (instance) (irate(node_network_transmit_bytes{instance="xxx",device!~"bond.*?|lo"}[5m])/128)

网卡出/入包:
// 入包量
sum by (instance) (rate(node_network_receive_bytes{instance="xxx",device!="lo"}[5m]))
// 出包量
sum by (instance) (rate(node_network_transmit_bytes{instance="xxx",device!="lo"}[5m]))