c169b4b1c5
* Add metrics from SNTPv4 packet to ntp collector & add ntpd sanity check 1. Checking local clock against remote NTP daemon is bad idea, local ntpd acting as a client should do it better and avoid excessive load on remote NTP server so the collector is refactored to query local NTP server. 2. Checking local clock against remote one does not check local ntpd itself. Local ntpd may be down or out of sync due to network issues, but clock will be OK. 3. Checking NTP server using sanity of it's response is tricky and depends on ntpd implementation, that's why common `node_ntp_sanity` variable is exported. * `govendor add golang.org/x/net/ipv4`, it is dependency of github.com/beevik/ntp * Update github.com/beevik/ntp to include boring SNTP fix * Use variable name from RFC5905 * ntp: move code to make export of raw metrics more explicit * Move NTP math to `github.com/beevik/ntp` * Make `golint` happy * Add some brief docs explaining `ntp` #655 and `timex` #664 modules * ntp: drop XXX comment that got its decision * ntp: add `_seconds` suffix to relevant metrics * Better `node_ntp_leap` comment * s/node_ntp_reftime/node_ntp_reference_timestamp_seconds/ as requested by @discordianfish * Extract subsystem name to const as suggested by @SuperQ
155 lines
7.8 KiB
Markdown
155 lines
7.8 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.
|
|
|
|
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 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
|
|
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 (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
|
|
nfs | Exposes NFS client statistics from `/proc/net/rpc/nfs`. This is the same information as `nfsstat -c`. | 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
|
|
|
|
### 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
|
|
|
|
### 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
|
|
`/rootfs` 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
|