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chmod +x prometheusrun-container.sh
./prometheusrun-container.sh

Docker will then download the latest official Prometheus Docker image, create and configure the container and then run said container. 

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sudo systemctl daemon-reload
sudo systemctl enable --now node_exporter

We've already setup node_exporter in our prometheus configuration file (see lines 31 to 34). 

Installing and configuring blackbox (to monitor endpoints)

Blackbox exporter is a prometheus exporter which can probe endpoints via http/https, icmp, etc.  It's extremely simple to setup and can be used to monitor the status of various endpoints (which could be web applications, REST endpoints, etc.).

We'll be using the a docker image to install and configure Blackbox exporter.

Start by cloning https://gitlab.jaytaala.com/docker/blackbox:

git clone https://gitlab.jaytaala.com/docker/blackbox

Similar to our prometheus docker image install, the repo contains only two files (which are the only two we need):

• run-container.sh : shell script that will run our docker command to install / configure blackbox exporter;
• config.yml : single configuration file for for blackbox exporter.

To setup and run our blackbox exporter simply make the run-container.sh executable and run it:

chmod +x run-container.sh
./run-container.sh

This will start blackbox-exporter on the default port (9115).  The config.yml file is similar to the default blackbox-exporter config.yml, but set the preferred ip protocol to ipv4 (by default it uses ipv6).

We've already setup blackbox-exporter in our prometheus configuration file (see lines 36 to 57). 

Installing and configuring Grafana

Grafana is a great 

Finally, we install and setup grafana

References

1. https://prometheus.io/
2. https://github.com/prometheus/node_exporter
3. https://prometheus.io/download/#node_exporter
4. https://github.com/prometheus/blackbox_exporter
5. https://grafana.com/

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