Aaron VanSledright

A Blog about my adventures in the cloud.

  • Automated Lambda Testing

    Look, I know there are a bunch of test frameworks that you could use for your Lambda functions. But what if you wanted something simple? I spent an afternoon putting together what I would want in a testing pipeline that returns a simple “Success/Fail” type response to me via Email. An architecture diagram for your…

  • SES Monitoring

    I love AWS. But one thing they don’t do is build complete tools. SES is one of them. I recently started getting emails about high usage for one of the identities that I have set up for SES. I would assume that there was a way to track usage within CloudWatch but for the life…

  • Building a Discord Bot with Python and AWS

    I’m a member of a lot of Discord servers. The one I participate in most is one with my brothers and our friends. In this server, we joke around a lot about people posting off-topic messages in the various text channels and we give them fake “warnings”. I decided to take this a step further…

  • Deleting MANY Lambda Function Versions

    I recently came across a challenge where I wanted to purge old Lambda Function versions. Some of the functions had over 65 versions! The code below will iterate through a text file with a Lambda function defined on each line. It will get a list of all the versions and delete any version that is…

  • Moving AWS Cloudfront Logs to DynamoDB

    I think its pretty obvious that I love DynamoDB. It has become one of my favorite AWS Services and I use it almost every day at work and am getting better at using it for my personal projects as well. I had a client approach me about getting logs from a Cloudfront Distribution. Cloudfront has…

  • Updating AWS Managed Prefix Lists

    I was working with a customer the other day trying to come up with a way to import a bunch of IP addresses into a white list on AWS. We came up with the approach of using Managed Prefix Lists in VPC. I wrote some Python in order to grab some code from an API…

  • Automating Security Group Rule Removal

    I’m using an Amazon Web Services Security Group as a way to allow traffic into an EC2 instance for the instance’s users. The users can give themselves access through a web interface that I wrote for them. Maybe I’ll cover that in a different post. I found recently that the Security Group was nearing its…

  • Deleting many files from the Linux Command Line

    I’ll admit that this post is more for me than any of my readers. I have this command that is buried in my notes and always takes me forever to dig back out. I figured I’d publish it on my blog so that I would maybe commit it to memory. Let’s say that you have…

  • EC2 Reservation Notification

    I realized today that I haven’t updated my EC2 reservations recently. Wondering why I never did this I came to understand that there was no way that I was getting notified that the reservations were expiring. I spent the day putting together a script that would look through my reservations, assess the time of their…

  • Adding a Standard Bucket Policy

    It is good practice to deny traffic that is not HTTPS to your S3 bucket. For this reason, I wrote a script that I can use to apply a standard policy to each of my S3 buckets. While the script could be more robust to iterate through each bucket in my account, I decided to…

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