mirror of
https://github.com/prometheus/node_exporter.git
synced 2024-11-23 20:36:21 +01:00
163 lines
8.3 KiB
Markdown
163 lines
8.3 KiB
Markdown
# Node exporter [][travis]
|
|
|
|
[][circleci]
|
|
[](https://buildkite.com/prometheus/node-exporter)
|
|
[][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.
|
|
|
|
Collectors are enabled by providing a `--collector.<name>` flag.
|
|
Collectors that are enabled by default can be disabled by providing a `--no-collector.<name>` 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
|
|
bonding | Exposes the number of configured and active slaves of Linux bonding interfaces. | Linux
|
|
boottime | Exposes system boot time derived from the `kern.boottime` sysctl. | Darwin, Dragonfly, FreeBSD, NetBSD, OpenBSD
|
|
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 and Intel OmniPath configurations. | Linux
|
|
ipvs | Exposes IPVS status from `/proc/net/ip_vs` and stats from `/proc/net/ip_vs_stats`. | 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, OpenBSD
|
|
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
|
|
nfs | Exposes NFS client statistics from `/proc/net/rpc/nfs`. This is the same information as `nfsstat -c`. | Linux
|
|
nfsd | Exposes NFS kernel server statistics from `/proc/net/rpc/nfsd`. This is the same information as `nfsstat -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_
|
|
timex | Exposes selected adjtimex(2) system call stats. | Linux
|
|
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
|
|
---------|-------------|----
|
|
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 (to version 8.4) | Linux
|
|
interrupts | Exposes detailed interrupts statistics. | Linux, OpenBSD
|
|
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
|
|
ntp | Exposes local NTP daemon health to check [time](./docs/TIME.md) | _any_
|
|
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
|
|
|
|
### 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
|
|
```
|
|
|
|
### Filtering enabled collectors
|
|
|
|
The `node_exporter` will expose all metrics from enabled collectors by default. This is the recommended way to collect metrics to avoid errors when comparing metrics of different families.
|
|
|
|
For advanced use the `node_exporter` can be passed an optional list of collectors to filter metrics. The `collect[]` parameter may be used multiple times. In Prometheus configuration you can use this syntax under the [scrape config](https://prometheus.io/docs/prometheus/latest/configuration/configuration/#<scrape_config>).
|
|
|
|
```
|
|
params:
|
|
collect[]:
|
|
- foo
|
|
- bar
|
|
```
|
|
|
|
This can be useful for having different Prometheus servers collect specific metrics from nodes.
|
|
|
|
## Building and running
|
|
|
|
Prerequisites:
|
|
|
|
* [Go compiler](https://golang.org/dl/)
|
|
* RHEL/CentOS: `glibc-static` package.
|
|
|
|
Building:
|
|
|
|
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.
|
|
Be aware that any non-root mount points you want to monitor will need bind-mounted
|
|
into the container.
|
|
|
|
```bash
|
|
docker run -d \
|
|
--net="host" \
|
|
--pid="host" \
|
|
quay.io/prometheus/node-exporter
|
|
```
|
|
|
|
## 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
|