Step-by-Step Guide to Installing and Configuring Prometheus, Node Exporter, Alertmanager, and Grafana

Installation

Download the appropriate compressed packages from the official website, extract them, add them as system services, and start them.

Node Exporter

Installation commands:

tar zxf node_exporter-0.17.0.linux-amd64.tar.gz -C /usr/local
vim /etc/systemd/system/node_exporter.service

[Unit]
Description=node_exporter
After=network.target

[Service]
Restart=on-failure
ExecStart=/usr/local/node_exporter-0.17.0.linux-amd64/node_exporter

[Install]
WantedBy=multi-user.target

systemctl start node_exporter
systemctl status node_exporter
systemctl enable node_exporter

Verification:

Alertmanager

Installation commands:

tar zxf alertmanager-0.17.0.linux-amd64.tar.gz  -C /usr/local
vim /etc/systemd/system/alertmanager.service

[Unit]
Description=Alertmanager
After=network-online.target

[Service]
Restart=on-failure
ExecStart=/usr/local/alertmanager-0.17.0.linux-amd64/alertmanager --config.file=/usr/local/alertmanager-0.17.0.linux-amd64/alertmanager.yml

[Install]
WantedBy=multi-user.target

systemctl start alertmanager
systemctl status alertmanager
systemctl enable alertmanager
netstat -anlpt | grep 9093

Verification:

Prometheus

Shell commands:

tar zxf prometheus-2.9.2.linux-amd64.tar.gz -C /usr/local
vim /etc/systemd/system/prometheus.service
 
[Unit]
Description=Prometheus Server
Documentation=https://prometheus.io/docs/introduction/overview/
After=network-online.target

[Service]
Restart=on-failure
ExecStart=/usr/local/prometheus-2.9.2.linux-amd64/prometheus --config.file=/usr/local/prometheus-2.9.2.linux-amd64/prometheus.yml --storage.tsdb.path=/var/lib/prometheus --web.external-url=http://0.0.0.0:9090

[Install]
WantedBy=multi-user.target

Verification:

Grafana

Installation steps:

下载：https://mirrors.tuna.tsinghua.edu.cn/grafana/yum/el7/grafana-5.4.2-1.x86_64.rpm

rpm -ivh grafana-5.4.2-1.x86_64.rpm

systemctl start grafana-server
systemctl status grafana-server
systemctl enable grafana-server

netstat -anlpt | grep 3000

Verification:

Configuration

Alertmanager

Configuration file:

global:
  resolve_timeout: 5m
  smtp_smarthost: 'smtp.qq.com:465'
  smtp_from: '[email protected]'
  smtp_auth_username: '[email protected]'
  smtp_auth_password: 'xxxkbpfmygbecg'
  smtp_require_tls: false

route:
  group_by: ['alertname']
  group_wait: 10s
  group_interval: 10s
  repeat_interval: 1h
  receiver: 'toemail'
receivers:
- name: 'toemail'
  email_configs:
  - to: '[email protected]'
    send_resolved: true
- name: 'web.hook'
  webhook_configs:
  - url: 'http://127.0.0.1:5001/'
inhibit_rules:
  - source_match:
      severity: 'critical'
    target_match:
      severity: 'warning'
    equal: ['alertname', 'dev', 'instance']

Prometheus

# my global config
global:
  scrape_interval:     15s # Set the scrape interval to every 15 seconds. Default is every 1 minute.
  evaluation_interval: 15s # Evaluate rules every 15 seconds. The default is every 1 minute.
  # scrape_timeout is set to the global default (10s).

# Alertmanager configuration
alerting:
  alertmanagers:
  - static_configs:
    - targets:
       - localhost:9093

# Load rules once and periodically evaluate them according to the global 'evaluation_interval'.
rule_files:
  - "rules/host_rules.yml"
  # - "second_rules.yml"

# A scrape configuration containing exactly one endpoint to scrape:
# Here it's Prometheus itself.
scrape_configs:
  # The job name is added as a label `job=
` to any timeseries scraped from this config.
  - job_name: 'prometheus'

    # metrics_path defaults to '/metrics'
    # scheme defaults to 'http'.

    static_configs:
    - targets: ['localhost:9090']

  - job_name: 'my target'
    static_configs:
    - targets: ['localhost:9100']

Verification

View targets:

View alert configuration:

View monitoring data (Grafana dashboard 9276):

Alerting

Simulate node_exporter Failure

systemctl stop node_exporter

Check Email Inbox

Above steps complete a simple monitoring and alerting setup.

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