[Install Prometheus Ubuntu] Install Prometheus on a Clean Ubuntu Box #ubuntu #prometheus #bash

prometheus-install.sh

#!/bin/bash
# Install Prometheus
#

# Fail fast (set -e will bail at first error)
set -e

if [ "$EUID" -ne 0 ]; then
    echo "ERROR: '$0' must be as root."
    exit 1
fi

#--------------------------------------------------------------------------------------------------------------
# NGINX
#--------------------------------------------------------------------------------------------------------------

  # Install Nginx
  sudo apt-get update && apt-get install -y nginx jq


  # Adjust Firewall Allow Settings And Enable
  sudo ufw allow 'OpenSSH'
  sudo ufw allow 'Nginx Full'
  sudo ufw enable

#--------------------------------------------------------------------------------------------------------------
# PROMETHEUS
#--------------------------------------------------------------------------------------------------------------
  # Setup Prometheus Environment Variables
  export PROMETHEUS_VERSION=$(curl --silent "https://api.github.com/repos/prometheus/prometheus/releases/latest" | jq -r .tag_name | sed 's/v//')
  export PROMETHEUS_RELEASE="prometheus-${PROMETHEUS_VERSION}.linux-amd64"
  export PROMETHEUS_FILENAME="${PROMETHEUS_RELEASE}.tar.gz"


  # Create Prometheus Users
  sudo useradd --no-create-home --shell /bin/false prometheus
  sudo useradd --no-create-home --shell /bin/false node_exporter


  # Create Prometheus Folders
  sudo mkdir /etc/prometheus
  sudo mkdir /var/lib/prometheus


  # Add Prometheus Folders Owners To New Users
  sudo chown prometheus:prometheus /etc/prometheus
  sudo chown prometheus:prometheus /var/lib/prometheus


  # Download Latest Prometheus
  cd ~
  curl -LO https://github.com/prometheus/prometheus/releases/download/v${PROMETHEUS_VERSION}/${PROMETHEUS_FILENAME}
  tar xvf ${PROMETHEUS_FILENAME}


  # Copy Files And Adjust Permissions/Ownership
  sudo cp ${PROMETHEUS_RELEASE}/prometheus /usr/local/bin/
  sudo cp ${PROMETHEUS_RELEASE}/promtool /usr/local/bin/
  sudo chown prometheus:prometheus /usr/local/bin/prometheus
  sudo chown prometheus:prometheus /usr/local/bin/promtool
  sudo cp -r ${PROMETHEUS_RELEASE}/consoles /etc/prometheus
  sudo cp -r ${PROMETHEUS_RELEASE}/console_libraries /etc/prometheus
  sudo chown -R prometheus:prometheus /etc/prometheus/consoles
  sudo chown -R prometheus:prometheus /etc/prometheus/console_libraries


  # Cleanup
  rm -rf ${PROMETHEUS_FILENAME} ${PROMETHEUS_RELEASE}


  # Configure Default Local Exporter
  echo "global:
    scrape_interval: 15s

  scrape_configs:
    - job_name: 'prometheus'
      scrape_interval: 5s
      static_configs:
        - targets: ['localhost:9090']
    - job_name: 'node_exporter'
      scrape_interval: 5s
      static_configs:
        - targets: ['localhost:9100']" > /etc/prometheus/prometheus.yml

  sudo chown prometheus:prometheus /etc/prometheus/prometheus.yml

  # Setup Service
  echo "[Unit]
  Description=Prometheus
  Wants=network-online.target
  After=network-online.target

  [Service]
  User=prometheus
  Group=prometheus
  Type=simple
  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

  [Install]
  WantedBy=multi-user.target" > /etc/systemd/system/prometheus.service

  sudo systemctl daemon-reload
  sudo systemctl enable prometheus
  sudo systemctl start prometheus

#--------------------------------------------------------------------------------------------------------------
# NODE EXPORTER
#--------------------------------------------------------------------------------------------------------------

# Setup Prometheus Node Exporter Environment Variables
export PROMETHEUS_NODE_EXPORTER_VERSION=$(curl --silent "https://api.github.com/repos/prometheus/node_exporter/releases/latest" | jq -r .tag_name | sed 's/v//')
export PROMETHEUS_NODE_EXPORTER_RELEASE="node_exporter-${PROMETHEUS_NODE_EXPORTER_VERSION}.linux-amd64"
export PROMETHEUS_NODE_EXPORTER_FILENAME="${PROMETHEUS_NODE_EXPORTER_RELEASE}.tar.gz"


# Download Latest Prometheus Node Exporter
cd ~
curl -LO https://github.com/prometheus/node_exporter/releases/download/v${PROMETHEUS_NODE_EXPORTER_VERSION}/${PROMETHEUS_NODE_EXPORTER_FILENAME}
tar xvf ${PROMETHEUS_NODE_EXPORTER_FILENAME}

# Copy Files And Adjust Permissions/Ownership
sudo cp ${PROMETHEUS_NODE_EXPORTER_RELEASE}/node_exporter /usr/local/bin/
sudo chown node_exporter:node_exporter /usr/local/bin/node_exporter

# Cleanup
rm -rf ${PROMETHEUS_NODE_EXPORTER_FILENAME} ${PROMETHEUS_NODE_EXPORTER_RELEASE}

# Configuration

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

[Service]
User=node_exporter
Group=node_exporter
Type=simple
ExecStart=/usr/local/bin/node_exporter

[Install]
WantedBy=multi-user.target" > /etc/systemd/system/node_exporter.service

sudo systemctl daemon-reload
sudo systemctl enable node_exporter
sudo systemctl start node_exporter


#
#--------------------------------------------------
# NGINX + PASSWORDS
#--------------------------------------------------
sudo apt-get update
sudo apt-get install apache2-utils
sudo htpasswd -b -c /etc/nginx/.htpasswd admin pr0m3th3u5pa55w0rd

echo "server {

        listen 80 default_server;
        listen [::]:80 default_server;

        root /var/www/html;

        index index.html index.htm index.nginx-debian.html;

        server_name _;

        location / {
             auth_basic \"Prometheus server authentication\";
             auth_basic_user_file /etc/nginx/.htpasswd;
             proxy_pass http://localhost:9090;
             proxy_http_version 1.1;
             proxy_set_header Upgrade $http_upgrade;
             proxy_set_header Connection 'upgrade';
             proxy_set_header Host $host;
             proxy_cache_bypass $http_upgrade;
        }
}" > /etc/nginx/sites-available/prometheus

sudo rm /etc/nginx/sites-enabled/default
sudo ln -s /etc/nginx/sites-available/prometheus /etc/nginx/sites-enabled/

sudo systemctl nginx start
sudo systemctl nginx enable