The ramblings of a computer geek
A potential scenario is to have a single Terraform template repository where you need to manage AWS resources across a number of different AWS Accounts. However, because each AWS Account is the edge of its authentication and authorisation profile, there is a need to be able cross this boundary within your Terraform to be able … Read more
You can force a replacement of an AWS EC2 instance within Terraform by issuing the following command. The previous command “taint” has now been deprecated. Where your instance is called “My-Instance-1” within the Terraform template. When you run this the instance will be destroyed and replaced (as if it was the first time it was … Read more
AWS CloudFront allows you to front your application (be it on EC2 instances or REST API etc.) so you can provide high availability, caching and protection (with WAF) to the workload. When configuring your application, you don’t want the application to be directly accessible without using CloudFront, so therefore you need to add some restrictions, … Read more
Here’s a little oddity with AWS Route Tables within Terraform, if you want to remove all of the routes in a route table, you can’t just delete or comment them out, otherwise it treats them as if nothing has changed. See the below example, you comment/remove the routes, then in its place add a blank … Read more
During my learning of AWS and its deployment via Terraform, I came across an issue where my EC2 instances kept getting destroyed, even when no changes had been made to them. For example in the plan output: Notice the “# forces replacement” on the security_groups directive. Turns it it was quite a simple fix, although … Read more
From the AWS CLI you can easily see how big a AWS S3 Bucket, firstly login to the AWS CLI and then you can run the command:
Its always best to be using a user account authenticated via SSO (so you can have additional levels of security, e.g. MFA) on-top, and access AWS resources using a temporary Role (to provide the permissions). For most use cases e.g. interacting with the Web Console, using the CLI or performing development tasks via Cloudformation templates … Read more
We had a need to upload a large volume of data to AWS S3, obviously we want this to upload as fast as possible, we choose to use the AWS S3 Sync tool; however to get the most performance out of it, you need to perform some tweaks to the configuration. Although you can make … Read more
Here’s a quick example configuration. I’m assuming you already have the AWS CLI packages installed, but if you need to use SSO to login to your AWS Organisation/Account, you can use the following example. AWS CLI Configuration File The AWS configuration file that should be located in: ~/.aws/config, with the contents such as: So let’s … Read more
The Amazon Elastic Container Service (ECS), specifically Fargate allows you to run containers on an ad-hoc basis. The following guide assumes you have already deployed an Amazon Elastic Container Registry (ECR), built your image, pushed it to the ECR and have obtained the Repository URI. The guide also uses local Terraform state, please see the … Read more