Script Day: AWS CLI with multiple accounts with ease

Maybe you are a consultant and juggle multiple clients with Amazon Web Services deployments, maybe you just have accounts for all the start-ups you ever worked for, or maybe you just like to use 17 different AWS accounts for the free-tier usage, but eventually your ~/.aws/credentials file looks like an MS-Windows INI file.

At this point, running the AWS CLI is kind of annoying – you need to remember the correct --profile flag to set for each scenario, and bash will not complete these for you…

Bash aliases to the rescue!

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Script Day: Cloud-init for MS-Windows, The Poor Man’s Version

Cloud-init is a Linux technology that allows easy setup and automation of virtual machines. The concept is very simple – the VM infrastructure provides some way of setting some custom data for each virtual machine (many providers call this “user data”), and when the operating system starts the cloud-init service reads that configuration, loads a bunch of modules to handle various parts and let them configure the system. As a user it is very convenient – you write a setup scenario using the variety of tools offered by cloud-init, you can store the scenario in a source control to allow to develop the scenario further, then just launch a bunch of machines with the specified scenario and watch them configure themselves.

The situation is much worse on the MS-Windows side of the fence: want to have an MS-Windows server configured and ready to go? Start a virtual machine, connect to is using RDP and Next, Next, Finish until your fingers are sore. Need to deploy a new version? either retrofit an existing image (again, manually) and risk deployment side effects, or do the whole process again from scratch.

Here’s a script to try to help a bit with the problem – at least on Amazon Web Services: a poor man’s cloud-init-like for MS-Windows server automation.

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Script Day: Upload Files to Amazon S3 Using Bash

Here is a very simple Bash script that uploads a file to Amazon’s S3. I’ve looked for a simple explanation on how to do that without perl scripts or C# code, and could find none. So after a bit of experimentation and some reverse engineering, here’s the simple sample code:

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