Prometheus.yml

# global specifies parameters that are valid in all other configuration contexts.
global: 
  scrape_interval: 15s # how frequently to scrape targets by default.
  scrape_timeout: 10s # how long until a scrape request times out.
  evaluation_interval: 15s # how frequently to evaluate rules
  
# Rule files specifies a list of globs. Rules and alerts are read from all matching files  
rule_files: 
 
# scrape_config section specifies a set of targets and parameters describing how to scrape them. 
scrape_configs:
- job_name: prometheus #the job name assigned to scraped metrics by default.
  honor_timestamps: true # controls whether Prometheus respects the timestamps present in scraped data.
  scrape_interval: 15s # allows you to override the global setting - if required.
  scrape_timeout: 10s # again allows you to override the global setting - if required.
  metrics_path: /metrics # the path prometheus will scrape to obtain metrics from the target.
  scheme: http #string can be http or https.
  static_configs: #specify a list of targets
  - targets:
    - 127.0.0.1:9090 # Promotheus expose its own metrics data on port 9090 by default.