3.8 KiB
Node exporter
Prometheus exporter for machine metrics, written in Go with pluggable metric collectors.
Building and running
make
./node_exporter <flags>
Running tests
make test
Available collectors
By default the build will include the native collectors that expose information
from /proc.
Which collectors are used is controlled by the --collectors.enabled flag.
Enabled by default
| Name | Description |
|---|---|
| conntrack | Shows conntrack statistics (does nothing if no /proc/sys/net/netfilter/ present). |
| diskstats | Exposes disk I/O statistics from /proc/diskstats. |
| entropy | Exposes available entropy. |
| filefd | Exposes file descriptor statistics. |
| filesystem | Exposes filesystem statistics, such as disk space used. |
| loadavg | Exposes load average. |
| mdadm | Exposes statistics about devices in /proc/mdstat (does nothing if no /proc/mdstat present). |
| meminfo | Exposes memory statistics from /proc/meminfo. |
| netdev | Exposes network interface statistics from /proc/netstat, such as bytes transferred. |
| netstat | Exposes network statistics from /proc/net/netstat. This is the same information as netstat -s. |
| stat | Exposes various statistics from /proc/stat. This includes CPU usage, boot time, forks and interrupts. |
| textfile | Exposes statistics read from local disk. The --collector.textfile.directory flag must be set. |
| time | Exposes the current system time. |
| vmstat | Exposes statistics from /proc/vmstat. |
| version | Exposes node_exporter version. |
Disabled by default
| Name | Description |
|---|---|
| bonding | Exposes the number of configured and active slaves of Linux bonding interfaces. |
| gmond | Exposes statistics from Ganglia. |
| interrupts | Exposes detailed interrupts statistics from /proc/interrupts. |
| ipvs | Exposes IPVS status from /proc/net/ip_vs and stats from /proc/net/ip_vs_stats. |
| lastlogin | Exposes the last time there was a login. |
| megacli | Exposes RAID statistics from MegaCLI. |
| ntp | Exposes time drift from an NTP server. |
| runit | Exposes service status from runit. |
| supervisord | Exposes service status from supervisord. |
| systemd | Exposes service and system status from systemd. |
| tcpstat | Exposes TCP connection status information from /proc/net/tcp and /proc/net/tcp6. (Warning: the current version has potential performance issues in high load situations.) |
Textfile Collector
The textfile collector is similar to the Pushgateway, in that it allows exporting of statistics from batch jobs. It can also be used to export static metrics, such as what role a machine has. The Pushgateway should be used for service-level metrics. The textfile module is for metrics that are tied to a machine.
To use it, set the --collector.textfile.directory flag on the Node exporter. The
collector will parse all files in that directory matching the glob *.prom
using the text
format.
To atomically push completion time for a cron job:
echo my_batch_job_completion_time $(date +%s) > /path/to/directory/my_batch_job.prom.$$
mv /path/to/directory/my_batch_job.prom.$$ /path/to/directory/my_batch_job.prom
To statically set roles for a machine using labels:
echo 'role{role="application_server"} 1' > /path/to/directory/role.prom.$$
mv /path/to/directory/role.prom.$$ /path/to/directory/role.prom
Using Docker
You can deploy this exporter using the prom/node-exporter Docker image.
For example:
docker pull prom/node-exporter
docker run -d -p 9100:9100 --net="host" prom/node-exporter