Dang Hoang Viet (HarryDang) : How To install Grafana & Prometheus on Ubuntu 20.04

We need fresh an ubuntu srv 20.04 with ssh only, pls prepare him first.
Reference:

Docs for Grafana:
https://grafana.com/docs/grafana/latest/getting-started/getting-started-prometheus/
Docs for Prometheus:
https://prometheus.io/docs/prometheus/latest/configuration/configuration/#scrape_config

1. Install Grafana:

sudo apt-get install -y apt-transport-https
sudo apt-get install -y software-properties-common wget
wget -q -O - https://packages.grafana.com/gpg.key | sudo apt-key add -
echo "deb https://packages.grafana.com/oss/deb stable main" | sudo tee -a /etc/apt/sources.list.d/grafana.list

After you add the repository:

sudo apt-get update
sudo apt-get install grafana

To start the service and verify that the service has started:

sudo systemctl daemon-reload
sudo systemctl start grafana-server
sudo systemctl status grafana-server
sudo systemctl enable grafana-server.service

To log in to Grafana for the first time:

Open your web browser and go to http://X.X.X.X:3000/ . On the login page, enter admin for username and password ( default: admin / admin )

If login is successful, then you will see a prompt to change the admin's password.

Its time to create first dashboard

Click the + icon on the left panel, select Create Dashboard, and then click Add An Empty panel

Select -- Grafana -- under query tab > click Apply

Fill dashboard name then click save

Disable anonymous access on our Grafana server. Change parameter look like bellow in Grafana configuration file:

[auth.anonymous]
# enable anonymous access
enabled = false

2. Install Prometheus:

You can check version at https://prometheus.io/download/

Download Prometheus:

wget https://github.com/prometheus/prometheus/releases/download/v2.26.0/prometheus-2.26.0.linux-amd64.tar.gz

Extract Prometheus:

tar xvzf prometheus-2.26.0.linux-amd64.tar.gz

Create a Prometheus user & Prometheus group.

useradd -rs /bin/false prometheus

Copy prometheus promtool to /usr/local/bin

cd prometheus-2.26.0.linux-amd64
cp prometheus promtool /usr/local/bin

Set permissions

chown prometheus:prometheus /usr/local/bin/prometheus

Create folder /etc/prometheus folder for Prometheus and move the console files, console libraries and the prometheus configuration file to this folder.

mkdir /etc/prometheus
cp -R consoles/ console_libraries/ prometheus.yml /etc/prometheus

Create a data folder for prometheus:

mkdir -p /data/prometheus

Set permission on both folders /data/prometheus & /etc/prometheus

chown -R prometheus:prometheus /data/prometheus /etc/prometheus/*

Create a new prometheus.service

cd /lib/systemd/system
touch prometheus.service

vi prometheus.service

then paste parameters bellow into this file:

[Unit]
Description=Prometheus
Wants=network-online.target
After=network-online.target
[Service]
Type=simple
User=prometheus
Group=prometheus
ExecStart=/usr/local/bin/prometheus \
--config.file=/etc/prometheus/prometheus.yml \
--storage.tsdb.path="/data/prometheus" \
--web.console.templates=/etc/prometheus/consoles \
--web.console.libraries=/etc/prometheus/console_libraries \
--web.listen-address=0.0.0.0:9090 \
--web.enable-admin-api
Restart=always
[Install]
WantedBy=multi-user.target

Enable at startup, and start Prometheus service.

systemctl enable prometheus
systemctl start prometheus
systemctl status prometheus

At this time you can access to your prometheus with the link : http://X.X.X.X:9090/

Go back to your Gafana to add prometheus data source

In configure your Prometheus data source windows, input URL http://localhost:9090 & select Skip TLS Verify then click Save & Test button.

3. Installing and running the node_exporter(all step are the same with prometheus at above):

you can get the download link for your platform at https://prometheus.io/download/

Docs prefer: https://github.com/prometheus/node_exporter

wget https://github.com/prometheus/node_exporter/releases/download/v1.1.2/node_exporter-1.1.2.linux-amd64.tar.gz
tar xvzf node_exporter-1.1.2.linux-amd64.tar.gz
cd node_exporter-1.1.2.linux-amd64
cp node_exporter /usr/local/bin
useradd -rs /bin/false node_exporter
chown node_exporter:node_exporter /usr/local/bin/node_exporter
cd /lib/systemd/system
touch node_exporter.service

vi node_exporter.service

then paste parameter to your node_exporter.service

[Unit]
Description=Node Exporter
Wants=network-online.target
After=network-online.target

[Service]
Type=simple
User=node_exporter
Group=node_exporter
ExecStart=/usr/local/bin/node_exporter \
--collector.mountstats \
--collector.logind \
--collector.processes \
--collector.ntp \
--collector.systemd \
--collector.tcpstat \
--collector.wifi

Restart=always

[Install]
WantedBy=multi-user.target