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Migrating Secrets Using HashiCorp Vault and Safe CLI

Vault and Safe

Vault is a secret management service by HashiCorp. It is a tool that will help you in storing secrets (API keys, passwords, etc.) and accessing them securely. You can use Vault with a user interface as well as through CLI. 

In this post, we will not be going deep into what Vault is, but instead, will look at how we can migrate secrets from one Vault to another. We can migrate secrets from Vault using Vault CLI, but it can get a little complicated to do so. Therefore, to make things easy, we will use Safe CLI, which is a wrapper around Vault. It will help us in managing and migrating our secrets by using simple commands. It also helps us connect to different vault instances very quickly for migration purposes.

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Preemptive Scheduling Coroutine Programming Language

The concept of coroutine must be familiar to everyone now. After all, not only LUA, Go, and Kotlin but also C++ all support coroutines.

But different languages have different implementations. Such as LUA, coroutines will be scheduled when someone called yield() or resume().

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Download Blob to Azure VM using Custom Script Extension via PowerShell

Virtual Machines in Azure can be spun up in multiple ways — Azure Portal, PowerShell, or by deploying ARM templates. They are created to serve a purpose, and often, we come across the need to store files in the VM. This can be achieved in multiple ways — Disks, AzCopy, download from Blob, Github, or other URLs. Installing or copying these files post-VM-creation is a daunting task, as that requires you to RDP or SSH into the machine and then start executing commands.

With the help of Custom Script Extension, copying files post VM creation can be automated with a simple PowerShell script. All you have to do is point out the location to the PowerShell script stored as a Blob in one of the containers.