Prometheus_Node-Explorer_Grafana/README.md

<p align="center"> 
## Prometheus Node-Explorer Grafana 
</p>

## Prometheus docker Install

 Docker installation

<code>apt update && apt upgrade
apt install curl</code>
 

<code>curl -fsSL https://get.docker.com -o get-docker.sh
sh get-docker.sh</code>


<code>docker volume create prometheus-data
docker volume create prometheus-conf</code>


<pre><span>docker run \
    -p 9090:9090 \ 
    -v prometheus-data:/prometheus \
    -v prometheus-conf:/etc/prometheus \
    --name prometheus \
    --restart=always
    prom/prometheus:latest   </pre></span>


Wer die Retention Time setzen möchte fügt folgendes hinzu. (Aufbewahrungszeit)

<code>--storage.tsdb.retention.time=30d --config.file=/etc/prometheus/prometheus.yml</code>


Prometheus Konfiguration – prometheus.yml

<pre><span># 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:
          # - alertmanager:9093

# Load rules once and periodically evaluate them according to the global 'evaluation_interval'.
rule_files:
  # - "first_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=<job_name>` to any timeseries scraped from this config.
  - job_name: "prometheus"

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

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

# Weitere Server sind Optional      
      
  - job_name: "Server-1" 

    static_configs:
      - targets: ["127.0.0.1:9100"]
      
  - job_name: "Server-2"

    static_configs:
      - targets: ["127.0.0.1:9100"]      
      
  - job_name: "Server-3"

    static_configs:
      - targets: ["127.0.0.1:9100"] 
</pre></span>
  

  ## Node Exporter installieren

Ordner erstellen, Node Exporter Download, Entpacken, Ordner öffnen
Node Exporter testweise starten

<pre><span>
mkdir /opt/node_exporter
cd /opt/node_exporter
wget https://github.com/prometheus/node_exporter/releases/download/v1.7.0/node_exporter-1.7.0.linux-amd64.tar.gz
tar xvfz node_exporter-1.3.1.linux-amd64.tar.gz
cd node_exporter-*.*-amd64
./node_exporter </pre></span>

<p><a href="https://github.com/prometheus/node_exporter/releases" target="_blank">Github Node-Exporter</a></p>


Start Skript für Node Exporter

<pre>nano /etc/systemd/system/node_exporter.service</pre>

<pre><span>[Unit]
Description=Node Exporter

[Service]
User=root
Group=root
#EnvironmentFile=-/etc/sysconfig/node_exporter
ExecStart=/opt/node_exporter/node_exporter-1.3.1.linux-amd64/node_exporter

[Install]
WantedBy=multi-user.target </pre></span>

<pre><span>systemctl daemon-reload
systemctl start node_exporter
systemctl enable node_exporter
systemctl status node_exporter</pre></span>


##Node Exporter mit Docker starten (Alternative)

<pre><span>docker run -d \
  --net="host" \
  --pid="host" \
  --name=NOEX \
  --restart=always \
  -v "/:/host:ro,rslave" \
  quay.io/prometheus/node-exporter:latest \
  --path.rootfs=/host</pre></span>