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Dynamically create hosts for AWS AutoScaling Groups

Our first use case are virtual Icinga host objects, one for each of your AWS AutoScaling Group. Single instances come and go, it’s tricky to monitor them in a meaningful way. Your AutoScaling Groups are here to stay, it is vital for your service that they are alive.

This example wants to teach you how to configure Director to automagically do this for you.

Create a new host template

I’d strongly suggest to create a dedicated template that should be inherited by all your virtual AWS ASG hosts. This allows you to add service checks to the template, with the Director automagically deploying them as apply rules affecting all your ASG hosts.

AWS host template

Whether you use a dummy host check or a plugin running against the AWS API is up to your personal preference.

Define a dedicated Import Source

As soon as you installed and enabled this module, a new Import Source will be available in your Icinga Director web frontend:

AWS import source basics

You can choose your AWS region from a dropdown:

AWS import source region

It is also necessary to choose one of your AWS keys:

AWS import source key

In case this list is empty, please check back to the Installation and Configuration section. Now you are ready to preview and/or run your first import. Don’t worry, nothing bad will happen. An Import run just imports plain data from your import source, it won’t touch any of your hosts or services in your Icinga Director.

Create a Sync Rule

Our Sync Rules are responsible for creating real Icinga objects based on data imported through one or more Import Sources. So let’s create a new rule:

AWS sync rule

Sync Properties allow you to specify how to treat the various properties in a granular way:

AWS sync properties

Now you are ready to trigger your first Sync Run. Activity Log and Sync History will show you what related actions took place

Have a look at your new hosts

Let’s have a look at our newly created host:

AWS host config

In case you want to achieve visibilty for your imported Custom Vars please define related Fields directly on your AWS ASG Template. Your hosts could then look as follows:

AWS host vars

The preview tab shows our rendered host, this is how it will get deployed to Icinga:

AWS host preview

That’s all for now, have fun!