CentOS Install Node Exporter

Overview

Describes how to manually install Node Exporter under CentOS and manage it with Systemd.

Installation

Create a user

1. [[email protected]]# adduser node_exporter

Install node exporter

1. [[email protected]]# cd /home/node_exporter
2. [[email protected]]# wget https://github.com/prometheus/node_exporter/releases/download/v1.5.0/node_exporter-1.5.0.linux-amd64.tar.gz
3. [[email protected]]# tar zxf node_exporter-1.5.0.linux-amd64.tar.gz && \
4. ln -s node_exporter-1.5.0.linux-amd64 node_exporter && \
5. chown -R node_exporter:node_exporter node_exporter && \
6. chown -R node_exporter:node_exporter node_exporter-1.5.0.linux-amd64 && \
7. cd node_exporter
8. [[email protected]]# touch /etc/sysconfig/node_exporter && echo 'OPTIONS="--collector.textfile.directory /var/lib/node_exporter/textfile_collector"' > /etc/sysconfig/node_exporter
9. [[email protected]]# mkdir -p /var/lib/node_exporter/textfile_collector && \
10. chown node_exporter:node_exporter /var/lib/node_exporter/textfile_collector
11. [[email protected]]# cat <<EOF> /usr/lib/systemd/system/node_exporter.service
12. [Unit]
13. Description=Node Exporter
14. [Service]
15. User=node_exporter
16. EnvironmentFile=/etc/sysconfig/node_exporter
17. ExecStart=/bin/sh -c '/home/node_exporter/node_exporter/node_exporter \$OPTIONS'
18. [Install]
19. WantedBy=multi-user.target
20. EOF
21. [[email protected]]# systemctl daemon-reload
22. [[email protected]]# systemctl enable node_exporter
23. [[email protected]]# systemctl start node_exporter

Config

If you want to change anything in the configuration then this can be done directly by modifying: /etc/sysconfig/node_exporter this file.

Cleanup

If you want to uninstall it, you can use these steps.

1. [[email protected]]# systemctl stop node_exporter
2. [[email protected]]# unlink node_exporter
3. [[email protected]]# rm -rf node_exporter-1.5.0.linux-amd64
4. [[email protected]]# userdel -r node_exporter
5. [[email protected]]#
6. [[email protected]]# rm -rf /var/lib/node_exporter
7. [[email protected]]# rm -rf /etc/sysconfig/node_exporter
8. [[email protected]]# rm -f /usr/lib/systemd/system/node_exporter.service

If that’s too much trouble, then you can use this script：

1. [[email protected]]# cat <<EOF> /tmp/uninstall-node-exporter.sh
2. systemctl stop node_exporter
3. unlink /home/node_exporter/node_exporter
4. userdel -r node_exporter
5. rm -rf /var/lib/node_exporter
6. rm -rf /etc/sysconfig/node_exporter
7. rm -f /usr/lib/systemd/system/node_exporter.service
8. EOF
9. [[email protected]]# sh /tmp/uninstall-node-exporter.sh