6 free ways to monitor your Docker containers

Docker is so popular, build, ship and run anywhere. But how to monitor your containers ?
Here is six solutions to choose:
  1. Docker stat: https://docs.docker.com/reference/commandline/stats/
  2. cAdvisor: https://github.com/google/cadvisor
  3. Telegraf + InfluxDB + Grafana
    1. https://github.com/influxdb/telegraf
    2. https://influxdb.com/
    3. http://grafana.org/
  4. Logstash + Elasticsearch + Kibana: https://www.elastic.co
  5. Newrelic (limited free): http://newrelic.com/docker
  6. Datadog (limited free): https://www.datadoghq.com/blog/monitor-docker-datadog/