155 lines
7.6 KiB
Markdown
155 lines
7.6 KiB
Markdown
# Node exporter [][travis]
|
|
|
|
[][circleci]
|
|
[][quay]
|
|
[][hub]
|
|
[][goreportcard]
|
|
|
|
Prometheus exporter for hardware and OS metrics exposed by \*NIX kernels, written
|
|
in Go with pluggable metric collectors.
|
|
|
|
The [WMI exporter](https://github.com/martinlindhe/wmi_exporter) is recommended for Windows users.
|
|
|
|
## Collectors
|
|
|
|
There is varying support for collectors on each operating system. The tables
|
|
below list all existing collectors and the supported systems.
|
|
|
|
Which collectors are used is controlled by the `--collectors.enabled` flag.
|
|
|
|
### Enabled by default
|
|
|
|
Name | Description | OS
|
|
---------|-------------|----
|
|
arp | Exposes ARP statistics from `/proc/net/arp`. | Linux
|
|
bcache | Exposes bcache statistics from `/sys/fs/bcache/`. | Linux
|
|
conntrack | Shows conntrack statistics (does nothing if no `/proc/sys/net/netfilter/` present). | Linux
|
|
cpu | Exposes CPU statistics | Darwin, Dragonfly, FreeBSD, Linux
|
|
diskstats | Exposes disk I/O statistics. | Darwin, Linux
|
|
edac | Exposes error detection and correction statistics. | Linux
|
|
entropy | Exposes available entropy. | Linux
|
|
exec | Exposes execution statistics. | Dragonfly, FreeBSD
|
|
filefd | Exposes file descriptor statistics from `/proc/sys/fs/file-nr`. | Linux
|
|
filesystem | Exposes filesystem statistics, such as disk space used. | Darwin, Dragonfly, FreeBSD, Linux, OpenBSD
|
|
hwmon | Expose hardware monitoring and sensor data from `/sys/class/hwmon/`. | Linux
|
|
infiniband | Exposes network statistics specific to InfiniBand configurations. | Linux
|
|
loadavg | Exposes load average. | Darwin, Dragonfly, FreeBSD, Linux, NetBSD, OpenBSD, Solaris
|
|
mdadm | Exposes statistics about devices in `/proc/mdstat` (does nothing if no `/proc/mdstat` present). | Linux
|
|
meminfo | Exposes memory statistics. | Darwin, Dragonfly, FreeBSD, Linux
|
|
netdev | Exposes network interface statistics such as bytes transferred. | Darwin, Dragonfly, FreeBSD, Linux, OpenBSD
|
|
netstat | Exposes network statistics from `/proc/net/netstat`. This is the same information as `netstat -s`. | Linux
|
|
sockstat | Exposes various statistics from `/proc/net/sockstat`. | Linux
|
|
stat | Exposes various statistics from `/proc/stat`. This includes boot time, forks and interrupts. | Linux
|
|
textfile | Exposes statistics read from local disk. The `--collector.textfile.directory` flag must be set. | _any_
|
|
time | Exposes the current system time. | _any_
|
|
uname | Exposes system information as provided by the uname system call. | Linux
|
|
vmstat | Exposes statistics from `/proc/vmstat`. | Linux
|
|
wifi | Exposes WiFi device and station statistics. | Linux
|
|
xfs | Exposes XFS runtime statistics. | Linux (kernel 4.4+)
|
|
zfs | Exposes [ZFS](http://open-zfs.org/) performance statistics. | [Linux](http://zfsonlinux.org/)
|
|
|
|
### Disabled by default
|
|
|
|
Name | Description | OS
|
|
---------|-------------|----
|
|
bonding | Exposes the number of configured and active slaves of Linux bonding interfaces. | Linux
|
|
buddyinfo | Exposes statistics of memory fragments as reported by /proc/buddyinfo. | Linux
|
|
devstat | Exposes device statistics | Dragonfly, FreeBSD
|
|
drbd | Exposes Distributed Replicated Block Device statistics | Linux
|
|
interrupts | Exposes detailed interrupts statistics. | Linux, OpenBSD
|
|
ipvs | Exposes IPVS status from `/proc/net/ip_vs` and stats from `/proc/net/ip_vs_stats`. | Linux
|
|
ksmd | Exposes kernel and system statistics from `/sys/kernel/mm/ksm`. | Linux
|
|
logind | Exposes session counts from [logind](http://www.freedesktop.org/wiki/Software/systemd/logind/). | Linux
|
|
meminfo\_numa | Exposes memory statistics from `/proc/meminfo_numa`. | Linux
|
|
mountstats | Exposes filesystem statistics from `/proc/self/mountstats`. Exposes detailed NFS client statistics. | Linux
|
|
nfs | Exposes NFS client statistics from `/proc/net/rpc/nfs`. This is the same information as `nfsstat -c`. | Linux
|
|
qdisc | Exposes [queuing discipline](https://en.wikipedia.org/wiki/Network_scheduler#Linux_kernel) statistics | Linux
|
|
runit | Exposes service status from [runit](http://smarden.org/runit/). | _any_
|
|
supervisord | Exposes service status from [supervisord](http://supervisord.org/). | _any_
|
|
systemd | Exposes service and system status from [systemd](http://www.freedesktop.org/wiki/Software/systemd/). | Linux
|
|
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.) | Linux
|
|
|
|
### Deprecated
|
|
|
|
*These collectors will be (re)moved in the future.*
|
|
|
|
Name | Description | OS
|
|
---------|-------------|----
|
|
gmond | Exposes statistics from Ganglia. | _any_
|
|
megacli | Exposes RAID statistics from MegaCLI. | Linux
|
|
ntp | Exposes time drift from an NTP server. | _any_
|
|
|
|
### Textfile Collector
|
|
|
|
The textfile collector is similar to the [Pushgateway](https://github.com/prometheus/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](http://prometheus.io/docs/instrumenting/exposition_formats/).
|
|
|
|
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
|
|
```
|
|
|
|
## Building and running
|
|
|
|
go get github.com/prometheus/node_exporter
|
|
cd ${GOPATH-$HOME/go}/src/github.com/prometheus/node_exporter
|
|
make
|
|
./node_exporter <flags>
|
|
|
|
To see all available configuration flags:
|
|
|
|
./node_exporter -h
|
|
|
|
## Running tests
|
|
|
|
make test
|
|
|
|
|
|
## Using Docker
|
|
The node\_exporter is designed to monitor the host system. It's not recommended
|
|
to deploy it as Docker container because it requires access to the host system.
|
|
If you need to run it on Docker, you can deploy this exporter using the
|
|
[node-exporter Docker
|
|
image](https://quay.io/repository/prometheus/node-exporter) with the following
|
|
options and bind-mounts:
|
|
|
|
```bash
|
|
docker run -d -p 9100:9100 \
|
|
-v "/proc:/host/proc:ro" \
|
|
-v "/sys:/host/sys:ro" \
|
|
-v "/:/rootfs:ro" \
|
|
--net="host" \
|
|
quay.io/prometheus/node-exporter \
|
|
-collector.procfs /host/proc \
|
|
-collector.sysfs /host/sys \
|
|
-collector.filesystem.ignored-mount-points "^/(sys|proc|dev|host|etc)($|/)"
|
|
```
|
|
|
|
Be aware though that the mountpoint label in various metrics will now have
|
|
`/host` as prefix.
|
|
|
|
## Using a third-party repository for RHEL/CentOS/Fedora
|
|
|
|
There is a [community-supplied COPR repository](https://copr.fedorainfracloud.org/coprs/ibotty/prometheus-exporters/). It closely follows upstream releases.
|
|
|
|
[travis]: https://travis-ci.org/prometheus/node_exporter
|
|
[hub]: https://hub.docker.com/r/prom/node-exporter/
|
|
[circleci]: https://circleci.com/gh/prometheus/node_exporter
|
|
[quay]: https://quay.io/repository/prometheus/node-exporter
|
|
[goreportcard]: https://goreportcard.com/report/github.com/prometheus/node_exporter
|