Aaron VanSledright

Tag: python3

  • 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 […]

  • 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 […]

  • Security Group ID Finder

    Security Group ID Finder

    I have been working on deploying resources to a lot of AWS accounts lately where each account has the same network infrastructure. When deploying Lambdas, I had the common name of the security group but not the ID. I wrote this utility to get the security group ID for me quickly. This is a simple […]

  • A Dynamo Data Migration Tool

    A Dynamo Data Migration Tool

    Have you ever wanted to migrate data from one Dynamo DB table to another? I haven’t seen an AWS tool to do this so I wrote one using Python. The process is pretty simple. First, we get all of our data from our source table. We store this in a list. Next, we iterate over […]

  • Querying and Editing a Single Dynamo Object

    I have a workflow that creates a record inside of a DynamoDB table as part of a pipeline within AWS. The record has a primary key of the Code Pipeline job. Later in the pipeline I wanted to edit that object to append the status of resources created by this pipeline. In order to do […]

  • EC2 Action Slack Notification

    I took a brief break from my Lambda function creation journey to go on vacation but, now i’m back! This function will notify a Slack channel of your choosing when an EC2 instance enters “Starting, Stopping, Stopped, or Shutting-Down” status. I thought this might be useful for instances that reside under a load balancer. It […]

  • Lambda Function Post to Slack

    I wrote this script out of a need to practice my Python skills. The idea is that if a file gets uploaded to an S3 bucket then the function will trigger and a message with that file name will be posted to a Slack channel of your choosing. To utilize this you will need to […]