https://til.juliusgamanyi.com/Julius Gamanyi's TILs. 2024-09-20T11:33:33+02:00 Julius Gamanyi https://til.juliusgamanyi.com/ Jekyll © 2024 Julius Gamanyi /assets/img/favicons/favicon.ico /assets/img/favicons/favicon-96x96.png 2024-09-18T20:15:00+02:00 2024-09-18T20:15:00+02:00 https://til.juliusgamanyi.com/posts/aws-ec2-with-userdata/ julius

This is more of a list of questions that come up when working with EC2s and UserData scripts. What UserData did the EC2 instance run at startup? aws ec2 describe-instance-attribute --instance-id i-0fe45e27d4b6f1cc3 --attribute userData | jq -r '.UserData.Value' | base64 -d What’s the size in bytes of UserData? Why check for the size of UserData? I’d like to pass UserData as a Parameter in...

2024-05-30T09:15:00+02:00 2024-05-30T09:15:00+02:00 https://til.juliusgamanyi.com/posts/powershell-check-local-admin-user-is-enabled/ julius

Aim: check if local admin user on Windows is enabled using PowerShell. It’s better to use the SID for the local administrator account instead of the hard-coded English name, Administrator, because the differs according to language. # get details PS C:\tmp> $AdminDetails = (Get-LocalUser | ? { $_.SID -like 'S-1-5-21-*-500'}) # print details PS C:\tmp> $AdminDetails # output looks like ...

2024-05-30T09:15:00+02:00 2024-05-30T09:15:00+02:00 https://til.juliusgamanyi.com/posts/aws-s3-check-folder-exists/ julius

I’d like to create a top-level directory in S3 if that directory doesn’t exist. Since S3 deals with objects, the concept of a directory is mapped to S3’s concept of prefix. The AWS S3 Cli call returns a json response containing the key Contents if the prefix (aka folder) exists. Because the response is json, I rely on jq to check if the result contains the Contents key. S3_BUCKET_NAME="mys3b...

2024-03-23T10:35:00+01:00 2024-03-23T10:35:00+01:00 https://til.juliusgamanyi.com/posts/aws-ssm-send-commands-to-run-on-remote-windows-ec2/ julius

Aim Recently, I wanted to execute commands from my local machine (even a CI machine) on a remote Windows EC2 instance. In other words, send a bunch of commands that get executed on a remote EC2 instance. And get back the status of the execution and the its output. This relies on the RunCommand feature of AWS Session Manager. Prerequisites A few prerequisites are: EC2 instance is running ...

2024-02-18T19:15:00+01:00 2024-02-18T19:15:00+01:00 https://til.juliusgamanyi.com/posts/gh-action-packer-error-nocredentialprovider/ julius

Problem: Packer shows aws.Config.CredentialsChainVerboseErrors When running Packer within GitHub Actions, I saw this error: ==> amazon-ebs.ami_name: Stopping the source instance... amazon-ebs.ami_name: Stopping instance ==> amazon-ebs.ami_name: For verbose messaging see aws.Config.CredentialsChainVerboseErrors ==> amazon-ebs.ami_name: Error stopping instance: NoCredentialProvide...