How to Install Prometheus using Docker on Ubuntu 18.04

1. Create a new file 

sudo nano ~/prometheus.yml

 Add below lines or copy paste into prometheus file

# A scrape configuration scraping a Node Exporter and the Prometheus server
# itself.
scrape_configs:
  # Scrape Prometheus itself every 5 seconds.
  - job_name: 'prometheus'
    scrape_interval: 5s
    static_configs:
      - targets: ['localhost:9090']

  # Scrape the Node Exporter every 5 seconds.
  - job_name: 'node'
    scrape_interval: 5s
    static_configs:
      - targets: ['your_server_ip:9100']
 

2. docker run -d -p 9090:9090 -v ~/prometheus.yml:/etc/prometheus/prometheus.yml prom/prometheus --config.file=/etc/prometheus/prometheus.yml --storage.tsdb.path=/prometheus

3. docker ps

4. http://your_server_ip:9090/status

ERROR :- state : UNKNOWN

SOLUTION :- remove  -storage.local.memory-chunks=10000