How to collect metrics from the server itself through Prometheus?

Question

Docker

Deployed Prometheus in a docker container. Used the official guide from Docker . But in this case, only the metrics of the docker itself and the docker containers are collected, and I also need to collect the metrics of the server itself, i.e. the machine itself, where docker is actually installed.
I have prometheus and grafana installed in the container.
Config file prometheus.yml (taken from the docks):

# my global config
global:
  scrape_interval:     15s # Set the scrape interval to every 15 seconds. Default is every 1 minute.
  evaluation_interval: 15s # Evaluate rules every 15 seconds. The default is every 1 minute.
  # scrape_timeout is set to the global default (10s).

  # Attach these labels to any time series or alerts when communicating with
  # external systems (federation, remote storage, Alertmanager).
  
alerting:
  alertmanagers:
     - static_configs:
        - targets:
           # - alertmanager:9093


# Load rules once and periodically evaluate them according to the global 'evaluation_interval'.
rule_files:
  # - "first.rules"
  # - "second.rules"

# A scrape configuration containing exactly one endpoint to scrape:
# Here it's Prometheus itself.
scrape_configs:
  # The job name is added as a label `job=<job_name>` to any timeseries scraped from this config.
  - job_name: 'prometheus'

    # metrics_path defaults to '/metrics'
    # scheme defaults to 'http'.

    static_configs:
      - targets: ['localhost:9090']

  - job_name: 'docker'
         # metrics_path defaults to '/metrics'
         # scheme defaults to 'http'.

    static_configs:
      - targets: ['ВНЕШНИЙ_IP:9323']

What is the best way to organize it?

Answer 1

You need to install node_exporter on the host (possible in docker). It will collect metrics from the host and export them to prometheus.