grafana-agent-install.sh

#!/usr/bin/env bash

# Download Node Exporter
wget https://github.com/prometheus/node_exporter/releases/download/v1.1.1/node_exporter-1.1.1.linux-amd64.tar.gz
tar xvfz node_exporter-*.*-amd64.tar.gz
cd node_exporter-*.*-amd64

# Install node_exporter to /usr/local/bin as grafana-agent
cp node_exporter /usr/local/bin/grafana-agent

# Reset working directory
cd ..

# Remove downloaded files
rm node_exporter-*.*-amd64.tar.gz
rm -R node_exporter-*.*-amd64

# Add grafana-agent user and service
sudo useradd --no-create-home --shell /bin/false grafana-agent
cat <<EOF > /etc/systemd/system/grafana-agent.service
[Unit]
Description=Grafana Agent
After=local-fs.target network-online.target network.target
Wants=local-fs.target network-online.target network.target

[Service]
User=grafana-agent
ExecStart=/usr/local/bin/grafana-agent
Restart=always

[Install]
WantedBy=multi-user.target
EOF
systemctl daemon-reload

# Allow access to grafana-agent from provided host
ufw allow from $1 to any proto tcp port 9100

# Start the grafana-agent service
service grafana-agent start

echo "Successfully installed, configured & started grafana-agent to be accessed by $1"