Automating infrastructure on cloud is an interesting topic, one that is both intriguing and challenging at the same time. With a proper arsenal of DevOps tools, this becomes pretty straightforward. In this blog post, we will attempt to create an EMQ cluster ( Erlang MQTT ) in AWS using popular HashiCorp tools like Packer and Terraform . For a simple guide to setup EMQ cluster using Oracle VirtualBox, please refer to this post . Additionally, it is assumed that the reader is moderately versed with technologies like Packer & Terraform and has basic understanding of AWS networking & EC2 instances. Before we proceed into the technical nitty-gritty, here's a brief overview of what we will try to achieve. Crux of the matter First of all, we will 'bake' an Amazon Machine Image or AMI for short, using Packer. This AMI will have EMQ (emqttd) installed. Subsequently, we'll use this custom AMI in our Terraform script to spin up EC2 instances and create...
HashiCorp's Terraform is a wonderful tool to create and manage Infrastructure as Code (IaC). IaC is the modern approach to manage infrastructure and a key part of DevOps practice. The idea of IaC is to treat infrastructure in the same way as we treat an application/software. It should go through similar cycles of version control, continuous integration, review and testing. In this blog post, we'll use Terraform to create a simple, secure and scalable infrastructure for web servers in AWS. The following diagram shows the landscape that we are about to create using Terraform. Assumptions Since we are going to use AWS provider, we need to possess appropriate access credentials. So we must have a user with programmatic access and permissions to create/modify/delete AWS resources. The AdministratorAccess policy is a good start, however it provides full admin access which may not be appropriate in all cases. Download and install Terraform Downloading and ins...