Book Image

The DevOps 2.2 Toolkit

By : Viktor Farcic
Book Image

The DevOps 2.2 Toolkit

By: Viktor Farcic

Overview of this book

Building on The DevOps 2.0 Toolkit and The DevOps 2.1 Toolkit: Docker Swarm, Viktor Farcic brings his latest exploration of the Docker technology as he records his journey to explore two new programs, self-adaptive and self-healing systems within Docker. The DevOps 2.2 Toolkit: Self-Sufficient Docker Clusters is the latest book in Viktor Farcic’s series that helps you build a full DevOps Toolkit. This book in the series looks at Docker, the tool designed to make it easier in the creation and running of applications using containers. In this latest entry, Viktor combines theory with a hands-on approach to guide you through the process of creating self-adaptive and self-healing systems. Within this book, Viktor will cover a wide-range of emerging topics, including what exactly self-adaptive and self-healing systems are, how to choose a solution for metrics storage and query, the creation of cluster-wide alerts and what a successful self-sufficient system blueprint looks like. Work with Viktor and dive into the creation of self-adaptive and self-healing systems within Docker.
Table of Contents (18 chapters)

Scaling services automatically

With the alerts firing from Prometheus into Alertmanager, the only thing left to do is to send requests to Jenkins to scale the service. We already created a similar Alertmanager config in one of the previous chapters, so we'll comment only on a few minor differences. The configuration is injected into the alert-manager service as a Docker secret.

Since secrets are immutable, we cannot update the one that is currently used. Instead, we'll have to remove the stack and the secret and create them again.

docker stack rm monitor 
docker secret rm alert_manager_config 

Now we can create a new secret with the updated Alertmanager configuration.

echo "route: 
  group_by: [service,scale] 
  repeat_interval: 5m 
  group_interval: 5m 
  receiver: 'slack' 
  - match: 
      service: 'go-demo_main'