[CentOS 7] Prometheus + Grafana 설치

CentOS 7 에 Prometheus + Grafana 설치 메뉴얼

 

프로메테우스 설치
https://prometheus.io/

# 유저 추가
useradd -m -s /bin/bash prometheus
su - prometheus

# 다운로드
cd /home/prometheus
wget https://github.com/prometheus/prometheus/releases/download/v2.21.0/prometheus-2.21.0.linux-amd64.tar.gz
tar -xzvf prometheus-2.21.0.linux-amd64.tar.gz

# 폴더명 변경 로그아웃
mv prometheus-2.21.0.linux-amd64/ prometheus
exit

# 시스템 서비스 등록
vi /etc/systemd/system/prometheus.service

[Unit]
Description=Prometheus Server
Documentation=https://prometheus.io/docs/introduction/overview/
After=network-online.target

[Service]
User=prometheus
Restart=on-failure
ExecStart=/home/prometheus/prometheus/prometheus \
  --config.file=/home/prometheus/prometheus/prometheus.yml \
  --storage.tsdb.path=/home/prometheus/prometheus/data

[Install]
WantedBy=multi-user.target

# 서비스 
systemctl daemon-reload
systemctl start prometheus
systemctl status prometheus
systemctl enable prometheus

# 확인
curl -X GET http://localhost:9090
<a href="/graph">Found</a>.

# 테스트에서만!
firewall-cmd --permanent --zone=public --add-port=9090/tcp
firewall-cmd --reload

Prometheus는 TCP 9090 포트로 서비스되므로 외부(Grafana 서버)에서 데이터 소스로 연결시 방화벽 개방이 필요하다.

Node Exporter는 TCP 9100 포트로 서비스되므로 외부(Prometheus 중앙 서버)에서 시계열 데이터 수집시 방화벽 개방이 필요하다.

---

Node Exporter 설치

# 유저 추가
useradd -m -s /bin/bash prometheus
su - prometheus

# 다운로드
cd /home/prometheus
wget https://github.com/prometheus/node_exporter/releases/download/v1.0.1/node_exporter-1.0.1.linux-amd64.tar.gz
tar -xzvf node_exporter-1.0.1.linux-amd64.tar.gz

# 폴더명 변경 로그아웃
mv node_exporter-1.0.1.linux-amd64/ node_exporter
exit

# 서비스 작성
vi /etc/systemd/system/node_exporter.service

[Unit]
Description=Prometheus Node Exporter
Documentation=https://prometheus.io/docs/guides/node-exporter/
Wants=network-online.target
After=network-online.target

[Service]
User=prometheus
Restart=on-failure
ExecStart=/home/prometheus/node_exporter/node_exporter

[Install]
WantedBy=multi-user.target

# 서비스
systemctl daemon-reload
systemctl start node_exporter
systemctl status node_exporter
systemctl enable node_exporter

# 테스트에서만!
firewall-cmd --permanent --zone=public --add-port=9100/tcp
firewall-cmd --reload

# 확인
curl -X GET http://localhost:9100/metrics

---

Prometheus 와 Node exporter 연동

cd /home/prometheus/prometheus

vi prometheus.yml 


# scrape_configs: 밑에 아래 추가
- job_name: 'test-node-1'
  static_configs:
  - targets: ['192.168.10.7:9100']

systemctl restart prometheus
systemctl status prometheus

 

---

Grafana 연동
https://grafana.com/grafana/download

# 설치
yum install initscripts urw-fonts wget

wget https://dl.grafana.com/oss/release/grafana-7.5.3-1.x86_64.rpm
yum install grafana-7.5.3-1.x86_64.rpm

# 테스트에서만!
firewall-cmd --permanent --zone=public --add-port=3000/tcp
firewall-cmd --reload

systemctl daemon-reload
systemctl start grafana-server
systemctl status grafana-server
systemctl enable grafana-server

By default, Grafana will be listening on http://localhost:3000. 
The default login is "admin" / "admin".
https://prometheus.io/docs/visualization/grafana/

1. Click on the "cogwheel" in the sidebar to open the Configuration menu.
2. Click on "Data Sources".
3. Click on "Add data source".
4. Select "Prometheus" as the type.
5. Set the appropriate Prometheus server URL (for example, http://localhost:9090/)
6. Adjust other data source settings as desired (for example, choosing the right Access method).
7. Click "Save & Test" to save the new data source.