The ramblings of a computer geek
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
We have a user which has somehow added a proxyAddress (an email address to their account) but they don’t have an Exchange Online mailbox, and seemingly never have. Microsoft says the following about it from this article: An example of the problem can be seen below, as you can see the object on the right has … 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
So you created an Exchange Online User and Mailbox but you’re still in a hybrid configuration where you are managing Exchange mailboxes on-premise. What this means is that the on-premise Exchange Organisation has no idea that the user exists, it doesn’t appear in Exchange Admin Center and it also probably won’t appear in the GAL. … 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 are currently going through a migration from on-premise Microsoft Exchange servers to Microsoft Exchange Online (Microsoft 365). We needed to determine what ActiveSync clients were in use to be able to provide guidance to users of what to do. So I wrote a simple script that retrieves all the mailboxes (that are enabled) and … 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