Prometheus Monitoring for Docker

Monitoring for Docker hosts using Prometheus and fig.

Requirements

1. Docker
2. fig

Installation

This repository contains a reference the repository github.com/docker-infra/container_exporter as a submodule. To download this repository with the submodule you must use the --recursive flag of the git clone command:

git clone --recursive git@github.com:andreaskoch/docker-prometheus-monitoring.git

After that your repository folder should look something like this:

docker-prometheus-monitoring
├── container_exporter
│   ├── devicemap.go
│   ├── Dockerfile
│   ├── docker_manager.go
│   ├── exporter.go
│   ├── main.go
│   ├── manager.go
│   ├── README.md
│   └── _vendor
│       └── ...
├── fig.yml
├── files
│   └── screenshots
├── prometheus.conf
└── README.md

Usage

fig up -d

This will start three components:

              Name                            Command               State           Ports          
--------------------------------------------------------------------------------------------------
prometheusmonitoring_dashboard_1   ./run ./bin/thin start           Up      0.0.0.0:3000->3000/tcp 
prometheusmonitoring_db_1          /entrypoint.sh mysqld            Up      3306/tcp               
prometheusmonitoring_metrics_1     ./container-exporter             Up      8080/tcp               
prometheusmonitoring_monitor_1     /go/src/github.com/prometh ...   Up      0.0.0.0:9090->9090/tcp 

1. A metrics server at that uses docker-infra/container_exporter to expose your docker metrics.

2. The Prometheus Monitor at http://localhost:9090

3. And a Prometheus Dashboard at http://localhost:3000 that allows you to place different metrics into customized dashboards.

Troubleshooting

Dashboard

ActiveRecord::PendingMigrationError

Migrations are pending. To resolve this issue, run: bin/rake db:migrate RAILS_ENV=development

To solve the issue send the mentioned command to the dashboard container:

docker exec prometheusmonitoring_dashboard_1 bash -c "bin/rake db:migrate RAILS_ENV=development"