#!/usr/bin/env bash

DOWNLOAD_URL="https://github.com/prometheus/blackbox_exporter/releases/download/v0.25.0/blackbox_exporter-0.25.0.linux-amd64.tar.gz"

wget "${DOWNLOAD_URL}" -O "blackbox.tar.gz"

tar xvf blackbox.tar.gz

cd blackbox_exporter-*linux-amd64
mv blackbox_exporter /usr/local/bin

mkdir -p /etc/blackbox

mv blackbox.yml /etc/blackbox
cd -

useradd -rs /bin/false blackbox

chown blackbox:blackbox /usr/local/bin/blackbox_exporter

chown -R blackbox:blackbox /etc/blackbox/*

cat >/etc/systemd/system/blackbox.service <<EOF
[Unit]
Description=Blackbox Exporter Service
Wants=network-online.target
After=network-online.target

[Service]
Type=simple
User=blackbox
Group=blackbox
ExecStart=/usr/local/bin/blackbox_exporter \
  --config.file=/etc/blackbox/blackbox.yml \
  --web.listen-address=":9115"

Restart=always

[Install]
WantedBy=multi-user.target
EOF

systemctl enable blackbox.service
systemctl start blackbox.service

systemctl status blackbox --no-pager