Setup node_exporter and promtail

node_exporter_promtail_setup.sh

#!/bin/bash
echo "********PROMTAIL SETUP************"
promtail_file_config="/etc/promtail/promtail.yml"
mkdir -p /etc/promtail
promtail_version_manual="v1.6.1"
LOKI_URL="http://utilities.usetada.dev:3100/loki/api/v1/push"

cat > /etc/systemd/system/promtail.service <<END
[Unit]
Description=Promtail service
After=network.target

[Service]
Type=simple
User=root
ExecStart=/usr/local/bin/promtail -config.file /etc/promtail/promtail.yml

[Install]
WantedBy=multi-user.target
END


cat > /etc/promtail/promtail.yml <<END
server:
  disable: true
positions:
  filename: /tmp/positions.yaml
clients:
  - url: ${LOKI_URL}
    batchsize: 76800
scrape_configs:
END


read -p "number of job : " numjob

for ((x=1; x<= $numjob; x++))
do
  echo    " === job $x ==="
  read -p " number of target : " numtarget
  read -p "       job_name : " job_name
  echo "  - job_name: "$job_name >> $promtail_file_config
  echo "    static_configs: " >> $promtail_file_config



  for ((i=1; i<= $numtarget; i++))
  do
    echo    "          --target $i--"
    read -p "             (label) job : " job
    read -p "             (label) app : " app
    read -p "             (label) container_name : " container_name
    read -p "             (label) instance : " instance
    read -p "             (label) environment : " environment
    read -p "             (label) __path__ : " path

    echo "      - targets: " >> $promtail_file_config
    echo "          - localhost " >> $promtail_file_config
    echo "        labels: " >> $promtail_file_config
    echo "          job: "$job >> $promtail_file_config
    echo "          app: "$app >> $promtail_file_config
    echo "          container_name: "$container_name >> $promtail_file_config
    echo "          instance: "$instance >> $promtail_file_config
    echo "          environment: "$environment >> $promtail_file_config
    echo "          __path__: "$path >> $promtail_file_config
  done
done

chmod -x /etc/promtail/promtail.yml


systemctl daemon-reload
systemctl enable promtail.service

promtail_version=$(/opt/elasticbeanstalk/bin/get-config environment -k PROMTAIL_VERSION)
if [[ $promtail_version != "" ]]; then
  cd /tmp
  echo "============= stop promtail =================="
  systemctl stop promtail
  echo "============= remove old promtail archive ===="
  rm -f promtail-linux-amd64.zip
  echo "============= download promtail" "============"
  curl -L -O https://github.com/grafana/loki/releases/download/${promtail_version}/promtail-linux-amd64.zip
  echo "============= unzip =========================="
  unzip -o promtail-linux-amd64.zip
  echo "============= cp promtail ===================="
  mv -f promtail-linux-amd64 /usr/local/bin/promtail
  echo "============= restart promtail ==============="
  systemctl restart promtail
  echo "============= done ==========================="
else
  cd /tmp
  echo "============= stop promtail =================="
  systemctl stop promtail
  echo "============= remove old promtail archive ===="
  rm -f promtail-linux-amd64.zip
  echo "============= download promtail" "============"
  curl -L -O https://github.com/grafana/loki/releases/download/${promtail_version_manual}/promtail-linux-amd64.zip
  echo "============= unzip =========================="
  unzip -o promtail-linux-amd64.zip
  echo "============= cp promtail ===================="
  mv -f promtail-linux-amd64 /usr/local/bin/promtail
  echo "============= restart promtail ==============="
  systemctl restart promtail
  echo "============= done ==========================="
fi
echo "********FINISH PROMTAIL SETUP************"



echo "********NODEEXPORTER SETUP************"

cat > /etc/systemd/system/node_exporter.service <<END
[Unit]
Description=node_exporter service
After=network.target

[Service]
ExecStart=/usr/local/bin/node_exporter
Type=simple
PIDFile=/var/run/node_exporter.pid
Restart=on-failure

[Install]
WantedBy=default.target
END

chmod 644 /etc/systemd/system/node_exporter.service


cd /tmp
curl -Ls -o ./node_exporter.tar.gz https://github.com/prometheus/node_exporter/releases/download/v1.7.0/node_exporter-1.7.0.linux-amd64.tar.gz
tar xvzpf node_exporter.tar.gz --strip-components=1
chmod 755 ./node_exporter
mv ./node_exporter /usr/local/bin/node_exporter

systemctl daemon-reload
systemctl enable node_exporter.service
systemctl start node_exporter.service

echo "********FINISH NODEEXPORTER SETUP************"