Publications de Erwan Alliaume

Keep your infrastructure keys safe with Vault

We have already presented Hashicorp Vault on this blog, how it is working in PKI mode (FR), its integration with AWS (FR) and with Kubernetes (FR). This time we will focus on another Vault goodness: how to use Vault to manage your SSH accesses in your infrastructure.To do that, we are going to use in the article the SSH Secret Engine provided by Vault..

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Hexagonal Architecture: three principles and an implementation example

Documented in 2005 by Alistair Cockburn, Hexagonal Architecture is a software architecture that has many advantages and has seen renewed interest since 2015. The original intent of Hexagonal Architecture is: Allow an application to equally be driven by users, programs, automated test or batch scripts, and to be developed and tested in isolation from its eventual run-time devices and databases. To explore the benefits of piloting an application by automated tests, or developing and testing in isolation from the database, we recommend that you read…

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Cold start / Warm start with AWS Lambda

The serverless brings many benefits for the deployment of web applications such as autoscaling, availability and having a very fine granularity on costs (billing per 100ms for AWS lambda). And of course the absence of server management (installations, patches,...). This article makes an inventory of the cold and warm start call metrics with AWS Lambda with different code implementations. Serverless is an ambiguous term that implies that there are no more servers: this is not the case! The term adapted could have been server[management]less but…

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The Reactive Revolution

It is the morning, at dawn, before the fortifications. Men are ready. For some time now, things have been moving with small changes, from here to there. The foundations are cracking, challenging them. Moreover, some have already made the leap. Others hesitate. The question is no longer about whether one is doing it, or if one is resisting, but rather when will one go. All these developments converge to the same goal: a new revolution in information technology.

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