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For the last week, I worked on a pretty intense migration of a fairly sizable Azure SQL instance that moved into AWS’ RDS service (running SQL Server). It was an intense project due to the timeline and size of the database. Of course, this involved access to both services, using both web consoles, CLI and native database interfaces. The client was controlling access to AWS and Azure using Azure AD, so I had to figure out federated access to the AWS API/CLI (since we built out their new environment using Terraform).

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There are several drastic HCL improvements forthcoming in version 0.12 of Terraform, but after an issue I encountered this week while creating some infrastructure with an 0.11.x version of the runtime, I wanted to cover the issue, how to remedy it in versions < 0.12, and talk about how (I believe) the issue will be remedied thanks to some of the 0.12 improvements. Basically, this type of issue will manifest itself as an error during the plan phase with this form of error message: module.

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Beginning with the 0.10.x version tree of Terraform, HashiCorp decided to decouple providers from the main Terraform runtime (see the 0.10.0 CHANGELOG for details). For a lot of users, this is a seamless win as Terraform will pull down whatever providers it deduces that it needs to execute your build assuming you have network connectivity to reach their servers and grab the files. This flexible architecture allows new providers to be released, bugfixes and features to be introduced in existing providers without requiring a version increment and download of a monolithic Terraform package.

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First off, forgive the title. I fall much more on the side of “devops” as a cultural mindset than a thing we do, but when it comes to searching for and exposing things for search on the interwebs, I’m going with the status quo. Next, a few caveats: I haven’t used every single one of these to great extent (or some even at all), but they are tools that are on my radar.

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OK, so not truly a one-liner, but a nice quick-n-dirty way to get a count of all active AZs for each region for your AWS account. echo -e "$(tput bold)Region | # AZs$(tput sgr0)" for region in $(aws ec2 describe-regions | jq -r '.Regions[].RegionName'); do num_azs=$(aws ec2 describe-availability-zones --region ${region} | jq -r '.AvailabilityZones | length') printf '%-15s | %5s\n' ${region} ${num_azs} done This requires jq and the AWS CLI to be installed.

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  • IoT Button EC2 Controller

    iot, iot-button, automation, ec2

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