Resource scarcity in Public Clouds

Posted on December 10, 2019

In the last couple of weeks, I’ve seen problems allocating resources in the Google Cloud Platform in the Frankfurt region. The problem seemed to have occurred due to the high requests Google customers made to sustain their businesses during the Black Friday, Thanksgiving, Cyber Monday period. Making some searches on Google, I’ve found out that this is not the first time it occurs, and this is not only a GCP problem since AWS and Azure had similar incidents.

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Google Cloud Snapshot Cleaner v0.2.0

Posted on September 22, 2019

Last week, in a previous article, I’ve introduced you to gcsc (Google Cloud Snapshot Cleaner). I’ve just released the version 0.2.0 of it, and it has a lot of clean-ups done, both in the code and the user experience. There are also some new features, but the one I’m more satisfied with, is the introduction of the http subcommand, to expose an HTTP server. The webserver will listen to any URI and Methods, and the request will trigger the snapshot clean-up.

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Google Cloud Snapshot Cleaner v0.1.0

Posted on September 16, 2019

I’ve just tagged the first version (0.1.0) of gcsc (Google Cloud Snapshot Cleaner). The idea behind this small software is to create a more flexible way to keep the Google Cloud Disks Snapshots tidy. Google Cloud does provide a very nice way to automatically snapshot your disks, leveraging the resource policies. This is very nice, since it allows you to be sure that the Google Cloud always and reliably snapshots your disks.

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Bootstrap2hugo upgraded to Bootstrap 4

Posted on April 30, 2019

For a few years now, I’ve been using Hugo for my website as well as other websites as well. My first Hugo website was my own since I wanted to learn more about the technology before suggesting it to anyone else. Back then I was not able to find any minimalistic theme I liked, and for that reason, I started my own. As you can imagine from the name, I based it on Bootstrap, version 3 since that was the current version when I started to work on it.

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Posted on February 4, 2019 - Bruxelles, BE

This year, as it has happened for the last few years, I’ve been at FOSDEM. As always I’ve enjoyed it a lot, and that’s why I continue to go there, and every time I have to suggest other people which events to attend in Europe, I always mention FOSDEM as the main event. This year, differently from previous editions, I tried to stick to a single room both days, being mostly in the Go room on Saturday and in the Containers room on Sunday.

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Calling a SOAP service in Go

Posted on December 3, 2018

Today the IT world is very focused on high performance, high throughput interfaces. In this situation, it is common to find REST and gRPC API, given their performances compared to the other solutions. Sometimes, though, we still encounter old API written with older techniques or new API that for some reasons have been developed with outdated technologies. One of those cases that I’ve encountered a few times over the last few months is SOAP.

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CORS with Go and Negroni

Posted on November 18, 2018

There are some pieces that you need to put in every microservice you write. Those are for instance logging, error handling, authentication. Over the last year, I found myself writing over and over CORS headers. This requirement brought me to think that I should have used a Negroni middleware since we are already using Negroni for other middlewares. I started looking online for an already written one, and I found a bunch, but I was not happy with what I found, so I decided to write my own.

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A lightweight approach to Go vanity import paths

Posted on September 23, 2018

Golang forces its users to use the repository URL of the dependency in the import statement. For instance, if we want to import the “test” package that is hosted at, we will need to use In one hand this is very nice since it allows anyone reading the code to immediately understand where the code is hosted and therefore finding it very quickly. Also, this URL-based import path guarantees that no two different packages can have the same import path, preventing this kind of confusion for both programmers and the compiler itself.

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A small HTTP debug server in Go

Posted on August 31, 2018

Lately, I found myself to work on an application that was communicating via SOAP with a server. My goal was to understand how this application worked with the SOAP server to emulate its behavior. Even if I had access to the source code of the application, I thought it would have been easier, faster and more fun to do the work without actually reading the code. It’s important to note that actually, the application is fairly small and self-contained.

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Why you should bundle the root CAs in your image

Posted on July 13, 2018

If you have ever used Docker or any other Linux OCI container system, you inevitably have incurred in the following error: x509: failed to load system roots and no roots provided This message is remembering you that you forgot to provide Root Certificate Authorities to your application. There are two different ways to solve this: mount the /etc/ssl/certs folder from the machine where the container is running bundling the root CAs in your image As you may imagine from the title, I believe that the second option is by far better than the first one.

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