mirror of
https://github.com/prometheus/node_exporter.git
synced 2024-12-29 07:29:48 -08:00
6468e7c80b
Enable NFS client metrics by default now that it nolonger prints errors on scrape if there are no metrics to display. Also fixup the nfsd README to match the nfs entry.
170 lines
8.4 KiB
Markdown
170 lines
8.4 KiB
Markdown
# Node exporter [][travis]
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[][circleci]
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[](https://buildkite.com/prometheus/node-exporter)
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[][quay]
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[][hub]
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[][goreportcard]
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Prometheus exporter for hardware and OS metrics exposed by \*NIX kernels, written
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in Go with pluggable metric collectors.
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The [WMI exporter](https://github.com/martinlindhe/wmi_exporter) is recommended for Windows users.
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## Collectors
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There is varying support for collectors on each operating system. The tables
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below list all existing collectors and the supported systems.
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Collectors are enabled by providing a `--collector.<name>` flag.
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Collectors that are enabled by default can be disabled by providing a `--no-collector.<name>` flag.
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### Enabled by default
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Name | Description | OS
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---------|-------------|----
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arp | Exposes ARP statistics from `/proc/net/arp`. | Linux
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bcache | Exposes bcache statistics from `/sys/fs/bcache/`. | Linux
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conntrack | Shows conntrack statistics (does nothing if no `/proc/sys/net/netfilter/` present). | Linux
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cpu | Exposes CPU statistics | Darwin, Dragonfly, FreeBSD, Linux
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diskstats | Exposes disk I/O statistics. | Darwin, Linux
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edac | Exposes error detection and correction statistics. | Linux
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entropy | Exposes available entropy. | Linux
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exec | Exposes execution statistics. | Dragonfly, FreeBSD
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filefd | Exposes file descriptor statistics from `/proc/sys/fs/file-nr`. | Linux
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filesystem | Exposes filesystem statistics, such as disk space used. | Darwin, Dragonfly, FreeBSD, Linux, OpenBSD
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hwmon | Expose hardware monitoring and sensor data from `/sys/class/hwmon/`. | Linux
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infiniband | Exposes network statistics specific to InfiniBand and Intel OmniPath configurations. | Linux
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ipvs | Exposes IPVS status from `/proc/net/ip_vs` and stats from `/proc/net/ip_vs_stats`. | Linux
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loadavg | Exposes load average. | Darwin, Dragonfly, FreeBSD, Linux, NetBSD, OpenBSD, Solaris
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mdadm | Exposes statistics about devices in `/proc/mdstat` (does nothing if no `/proc/mdstat` present). | Linux
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meminfo | Exposes memory statistics. | Darwin, Dragonfly, FreeBSD, Linux, OpenBSD
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netdev | Exposes network interface statistics such as bytes transferred. | Darwin, Dragonfly, FreeBSD, Linux, OpenBSD
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netstat | Exposes network statistics from `/proc/net/netstat`. This is the same information as `netstat -s`. | Linux
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nfs | Exposes NFS client statistics from `/proc/net/rpc/nfs`. This is the same information as `nfsstat -c`. | Linux
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nfsd | Exposes NFS kernel server statistics from `/proc/net/rpc/nfsd`. This is the same information as `nfsstat -s`. | Linux
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sockstat | Exposes various statistics from `/proc/net/sockstat`. | Linux
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stat | Exposes various statistics from `/proc/stat`. This includes boot time, forks and interrupts. | Linux
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textfile | Exposes statistics read from local disk. The `--collector.textfile.directory` flag must be set. | _any_
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time | Exposes the current system time. | _any_
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timex | Exposes selected adjtimex(2) system call stats. | Linux
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uname | Exposes system information as provided by the uname system call. | Linux
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vmstat | Exposes statistics from `/proc/vmstat`. | Linux
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wifi | Exposes WiFi device and station statistics. | Linux
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xfs | Exposes XFS runtime statistics. | Linux (kernel 4.4+)
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zfs | Exposes [ZFS](http://open-zfs.org/) performance statistics. | [Linux](http://zfsonlinux.org/)
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### Disabled by default
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Name | Description | OS
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---------|-------------|----
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bonding | Exposes the number of configured and active slaves of Linux bonding interfaces. | Linux
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buddyinfo | Exposes statistics of memory fragments as reported by /proc/buddyinfo. | Linux
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devstat | Exposes device statistics | Dragonfly, FreeBSD
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drbd | Exposes Distributed Replicated Block Device statistics (to version 8.4) | Linux
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interrupts | Exposes detailed interrupts statistics. | Linux, OpenBSD
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ksmd | Exposes kernel and system statistics from `/sys/kernel/mm/ksm`. | Linux
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logind | Exposes session counts from [logind](http://www.freedesktop.org/wiki/Software/systemd/logind/). | Linux
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meminfo\_numa | Exposes memory statistics from `/proc/meminfo_numa`. | Linux
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mountstats | Exposes filesystem statistics from `/proc/self/mountstats`. Exposes detailed NFS client statistics. | Linux
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ntp | Exposes local NTP daemon health to check [time](./docs/TIME.md) | _any_
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qdisc | Exposes [queuing discipline](https://en.wikipedia.org/wiki/Network_scheduler#Linux_kernel) statistics | Linux
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runit | Exposes service status from [runit](http://smarden.org/runit/). | _any_
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supervisord | Exposes service status from [supervisord](http://supervisord.org/). | _any_
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systemd | Exposes service and system status from [systemd](http://www.freedesktop.org/wiki/Software/systemd/). | Linux
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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
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### Deprecated
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*These collectors will be (re)moved in the future.*
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Name | Description | OS
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---------|-------------|----
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gmond | Exposes statistics from Ganglia. | _any_
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### Textfile Collector
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The textfile collector is similar to the [Pushgateway](https://github.com/prometheus/pushgateway),
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in that it allows exporting of statistics from batch jobs. It can also be used
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to export static metrics, such as what role a machine has. The Pushgateway
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should be used for service-level metrics. The textfile module is for metrics
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that are tied to a machine.
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To use it, set the `--collector.textfile.directory` flag on the Node exporter. The
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collector will parse all files in that directory matching the glob `*.prom`
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using the [text
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format](http://prometheus.io/docs/instrumenting/exposition_formats/).
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To atomically push completion time for a cron job:
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```
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echo my_batch_job_completion_time $(date +%s) > /path/to/directory/my_batch_job.prom.$$
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mv /path/to/directory/my_batch_job.prom.$$ /path/to/directory/my_batch_job.prom
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```
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To statically set roles for a machine using labels:
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```
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echo 'role{role="application_server"} 1' > /path/to/directory/role.prom.$$
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mv /path/to/directory/role.prom.$$ /path/to/directory/role.prom
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```
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### Filtering enabled collectors
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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 familes.
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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>).
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```
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params:
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collect[]:
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- foo
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- bar
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```
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This can be useful for having different Prometheus servers collect specific metrics from nodes.
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## Building and running
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Prerequisites:
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* [Go compiler](https://golang.org/dl/)
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* RHEL/CentOS: `glibc-static` package.
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Building:
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go get github.com/prometheus/node_exporter
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cd ${GOPATH-$HOME/go}/src/github.com/prometheus/node_exporter
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make
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./node_exporter <flags>
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To see all available configuration flags:
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./node_exporter -h
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## Running tests
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make test
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## Using Docker
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The node\_exporter is designed to monitor the host system. It's not recommended
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to deploy it as Docker container because it requires access to the host system.
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Be aware that any non-root mount points you want to monitor will need bind-mounted
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into the container.
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```bash
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docker run -d \
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--net="host" \
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--pid="host" \
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quay.io/prometheus/node-exporter
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```
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## Using a third-party repository for RHEL/CentOS/Fedora
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There is a [community-supplied COPR repository](https://copr.fedorainfracloud.org/coprs/ibotty/prometheus-exporters/). It closely follows upstream releases.
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[travis]: https://travis-ci.org/prometheus/node_exporter
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[hub]: https://hub.docker.com/r/prom/node-exporter/
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[circleci]: https://circleci.com/gh/prometheus/node_exporter
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[quay]: https://quay.io/repository/prometheus/node-exporter
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[goreportcard]: https://goreportcard.com/report/github.com/prometheus/node_exporter
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