How to Setup Monitoring for Docker Containers using Prometheus on Ubuntu 18.04

 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

sudo nano ~/docker-compose.yml or sudo nano /etc/prometheus/docker-compose.yml

 

copy paste at last line

node-exporter:
     image: prom/node-exporter
     ports:
       - '9100:9100'

 sudo nano ~/ prometheus.yml  or sudo nano /etc/prometheus/prometheus.yml

 

copy paste at last line 

- 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