Requirment
1. docker should be installed
2. docker-compose also be installed
Installation of docker
1. sudo apt-get install docker.io or sudo apt install docker.io
2. docker --version
3. sudo apt-get install docker-compose
Creating a Configuration files of prometheus
1. create a new file prometheus.yml and copy paste below
sudo nano ~/ prometheus.yml or sudo nano /etc/prometheus/prometheus.yml
# prometheus.yml
global:
 scrape_interval: 5s
 external_labels:
   monitor: 'my-monitor'
rule_files:
 - 'alert.rules'
scrape_configs:
 - job_name: 'prometheus'
   static_configs:
     - targets: ['your_server_ip:9090']2. create a new file docker-compose.yml and copy paste below
sudo nano ~/docker-compose.yml or sudo nano /etc/prometheus/docker-compose.yml
# docker-compose.yml
version: '2'
services:
  prometheus:
     image: prom/prometheus:latest
     volumes:
       - ./prometheus.yml:/etc/prometheus/prometheus.yml            
     command:
       - '--config.file=/etc/prometheus/prometheus.yml'
     ports:
       - '9090:9090'3. Run the docker compose file
cd /etc/prometheus/     or  sudo ~/docker-compose up
sudo docker-compose up
 4. Open browser
http://your_server_ip:9090
5. Install Node exporter
node-exporter:
     image: prom/node-exporter
     ports:
       - '9100:9100' sudo nano ~/ prometheus.yml  or sudo nano /etc/prometheus/prometheus.yml- job_name: 'node-exporter'
   static_configs:
     - targets: ['node-exporter:9100'] 6. Restart docker-composer
cd /etc/prometheus/ or sudo ~/docker-compose restart
sudo docker-compose restart
7. Install Grafana
sudo nano ~/docker-compose.yml or sudo nano /etc/prometheus/docker-compose.yml
copy paste at last line   
grafana:
     image: grafana/grafana
     user: "0" #[ Execute  id -u in terminal to find the user id from where you are invoking docker compose]
     volumes:
       - ./grafana_db:/var/lib/grafana
     environment:
       - GF_SECURITY_ADMIN_PASSWORD=yourpass
     depends_on:
       - prometheus
     ports:
       - '3000:3000' 4. Open browser
http://your_server_ip:3000
