Scalable Cloud Ops with Fugue: Declare, Deploy, and Automate the Cloud by Josha Stella

Author:Josha Stella [Stella, Josha]
Language: eng
Format: azw3
Tags: Pragmatic Bookshelf
Publisher: Pragmatic Bookshelf
Published: 2017-07-11T04:00:00+00:00

Reducing Redundancy in Refuge ASGs and Beyond

Let’s apply more of what you’ve learned to our Refuge composition. Looking at the code, we can see that there are many similarities between the refuge-web-app, refuge-api, and refuge-notifiication-worker services. Namely, each is composed of the following resources:

AutoScalingGroup

LaunchConfiguration

SecurityGroup

InstanceProfile (and associated role and policy)

A few differences aside, all of these resources are configured in pretty much the same way. Let’s pull that common structure out to a function, both to reduce duplication and to allow us to focus on the interesting parts of our services, rather than the boilerplate they have in common. We’ll use an approach similar to the loadbalancer function we wrote earlier in ​Tightening Refuge Code with a Function​, but this time our resources differ in more than just their names.

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