Инструмент node_exporter крайне необходим для отслеживания серверных параметров. Этот компонент экспортирует различные метрики (например, статистику I/O, нагрузку CPU, использование памяти, сетевую статистику и многое другое) в формате, понятном программе Prometheus.
Создаем новый каталог node_exporter в каталоге /opt:
mkdir -p /opt/node_exporter
Распаковываем архив и копируем исполняемый файл node_exporter в ранее созданный каталог:
tar -xvzf ~/node_exporter-0.18.1.linux-amd64.tar.gz
cp ~/node_exporter-0.18.1.linux-amd64/node_exporter /opt/node_exporter
В каталоге /etc/systemd/system/ создаем конфигурационный файл node_exporter.serviceследующего содержания:
vim /etc/systemd/system/node_exporter.service
node_exporter.service:
[Unit]
Description=Node Exporter
[Service]
ExecStart=/opt/node_exporter/node_exporter
[Install]
WantedBy=default.target
Далее выполняем:
sudo systemctl daemon-reload
sudo systemctl enable node_exporter.service
sudo systemctl start node_exporter.service
Через мгновение, как только node_exporterсоберет данные, они будут доступны в веб-интерфейсе по адресу http://[IP-адрес сервера]:9100.
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, Solaris |
| conntrack | Shows conntrack statistics (does nothing if no /proc/sys/net/netfilter/ present). |
Linux |
| cpu | Exposes CPU statistics | Darwin, Dragonfly, FreeBSD, Linux, Solaris |
| cpufreq | Exposes CPU frequency statistics | Linux, Solaris |
| diskstats | Exposes disk I/O statistics. | Darwin, Linux, OpenBSD |
| 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 |
| netclass | Exposes network interface info from /sys/class/net/ |
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 |
| 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 |
| pressure | Exposes pressure stall statistics from /proc/pressure/. |
Linux (kernel 4.20+ and/or CONFIG_PSI) |
| schedstat | Exposes task scheduler statistics from /proc/schedstat. |
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. | FreeBSD, Linux |
| vmstat | Exposes statistics from /proc/vmstat. |
Linux |
| xfs | Exposes XFS runtime statistics. | Linux (kernel 4.4+) |
| zfs | Exposes ZFS performance statistics. | Linux, Solaris |
Disabled by default
The perf collector may not work by default on all Linux systems due to kernel configuration and security settings. To allow access, set the following sysctl parameter:
sysctl -w kernel.perf_event_paranoid=X
- 2 allow only user-space measurements (default since Linux 4.6).
- 1 allow both kernel and user measurements (default before Linux 4.6).
- 0 allow access to CPU-specific data but not raw tracepoint samples.
- -1 no restrictions.
Depending on the configured value different metrics will be available, for most cases 0 will provide the most complete set. For more information see man 2 perf_event_open.
| 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. | 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 | any |
| processes | Exposes aggregate process statistics from /proc. |
Linux |
| qdisc | Exposes queuing discipline statistics | Linux |
| runit | Exposes service status from runit. | any |
| supervisord | Exposes service status from supervisord. | any |
| systemd | Exposes service and system status from 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 |
| wifi | Exposes WiFi device and station statistics. | Linux |
| perf | Exposes perf based metrics (Warning: Metrics are dependent on kernel configuration and settings). | Linux |
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