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installPrometheusAndGrafana.md

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How to install Grafana and Prometheus on RHEL8

Required ports

Prometheus: 9090
Grafana: 3000

Prometheus

sudo groupadd --system prometheus
sudo useradd -s /sbin/nologin --system -g prometheus prometheus
sudo mkdir /var/lib/prometheus

for i in rules rules.d files_sd; do
 sudo mkdir -p /etc/prometheus/${i};
done

curl -s https://api.github.com/repos/prometheus/prometheus/releases/latest \
| grep browser_download_url \
| grep linux-amd64 \
| cut -d '"' -f 4 \
| wget -qi -


tar xvf prometheus-*.tar.gz
cd prometheus-*/
sudo cp prometheus promtool /usr/local/bin/

sudo cp -r prometheus.yml consoles/ console_libraries/ /etc/prometheus/

Create a Prometheus configuration file.

Prometheus configuration file will be located under /etc/prometheus/prometheus.yml, in the targets, add the CP components, for example (8079 is the zookeeper service, 8080 is the broker service):

      - targets: ['localhost:9090','ip-192-168-4-72.eu-west-2.compute.internal:8079' ,'ip-192-168-5-25.eu-west-2.compute.internal:8080' ,'ip-192-168-6-107.eu-west-2.compute.internal:8079' ,'ip-192-168-7-245.eu-west-2.compute.internal:8079' ,'ip-192-168-8-96.eu-west-2.compute.internal:8080','ip-192-168-11-244.eu-west-2.compute.internal:8080']

# 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: 15s  # scrape_timeout is set to the global default (10s).

# 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','ip-192-168-4-72.eu-west-2.compute.internal:8079' ,'ip-192-168-5-25.eu-west-2.compute.internal:8080' ,'ip-192-168-6-107.eu-west-2.compute.internal:8079' ,'ip-192-168-7-245.eu-west-2.compute.internal:8079' ,'ip-192-168-8-96.eu-west-2.compute.internal:8080','ip-192-168-11-244.eu-west-2.compute.internal:8080']

sudo vi /etc/systemd/system/prometheus.service

Copy paste:

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

[Service]
Type=simple
User=prometheus
Group=prometheus
ExecReload=/bin/kill -HUP $MAINPID
ExecStart=/usr/local/bin/prometheus \
  --config.file=/etc/prometheus/prometheus.yml \
  --storage.tsdb.path=/var/lib/prometheus \
  --web.console.templates=/etc/prometheus/consoles \
  --web.console.libraries=/etc/prometheus/console_libraries \
  --web.listen-address=0.0.0.0:9090 \
  --web.external-url=

SyslogIdentifier=prometheus
Restart=always

[Install]
WantedBy=multi-user.target

sudo chown -R prometheus:prometheus /etc/prometheus
sudo chmod -R 775 /etc/prometheus/
sudo mkdir /var/lib/prometheus/
sudo chown -R prometheus:prometheus /var/lib/prometheus/
sudo systemctl daemon-reload
sudo systemctl start prometheus
sudo systemctl enable prometheus

Check server IP on port 9090 , and targets, like this: http://ec2-18-169-53-36.eu-west-2.compute.amazonaws.com:9090/targets?search=

Grafana

sudo yum update
sudo vi /etc/yum.repos.d/grafana.repo

Copy paste:

[grafana]
name=grafana
baseurl=https://rpm.grafana.com
repo_gpgcheck=1
enabled=1
gpgcheck=1
gpgkey=https://rpm.grafana.com/gpg.key
sslverify=1
sslcacert=/etc/pki/tls/certs/ca-bundle.crt

sudo yum install grafana
sudo systemctl daemon-reload
sudo systemctl start grafana-server
sudo systemctl status grafana-server
sudo systemctl enable grafana-server

Grafana should now serve on port 3000, for example: http://ec2-18-169-53-36.eu-west-2.compute.amazonaws.com:3000

Add dashboards, or create

Add data source in Grafana UI: type Prometheus
Add following HTTP URL and make sure to save and test (replace dns with yours): http://ec2-18-169-53-36.eu-west-2.compute.amazonaws.com:9090
The new page will have a URL with a UID in it: http://ec2-18-169-53-36.eu-west-2.compute.amazonaws.com:3000/datasources/edit/RxmrY5HVz copy the UID (for example RxmrY5HVz)
Change the datasource UID in the provided file example-confluent-platform.json Replace "uid": "RxmrY5HVz" with your own, the new UID from before
Deploy CP grafana dashboard
Import dashboard for CP: example-confluent-platform.json

The above is a basic example and does not hold all the metrics needed for monitoring, you can edit the dashboard and add the needed configs.

Reference

Prometheus Grafana