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Hyperscale

25 Jun 2018

Our initial goal is to try to answer questions such as when it is more appropriate to use AWS Lambda instead of AWS EC2 services, and especially, which parameters affect this comparison the most.

06 Apr 2018

There are a few Container Orchestration Engines available, such as Kubernetes, OpenShift, DC/OS, Nomad or Swarm, to name a few. On occasion, the optimal solution to deploy your apps requieres picking not one of those, but two or more. Each have their strenghts, and are targetted toward a specific kind of load. For instance, Kubernetes is specially prepared to deploy microservices very dynamically. However, in such a dynamic environment it is hard to handle a persistent database, task which is better handled by system such as DC/OS.

27 Feb 2018

19 Feb 2018

05 Dec 2017

30 Nov 2017

Today, a large majority of modern apps or services are RESTful APIs and use API definitions to facilitate communications between them, as it saves us from having to worry about the language and the underlying implementation of the remaining components. APIs make even more sense in microservice or serverless architectures with dozens or hundreds of mutually interacting microservices/functions.

06 Nov 2017

At BBVA Labs, we follow the test pyramid concept proposed by Mike Cohn. We have a large collection of unit tests that are easy to implement and which are run at every change in code; a collection of acceptance tests which are run whenever the previous tests are passed; and finally, end-to-end tests that are only run to unlock a function.

The complexity of implementing these tests increases as you move up in the pyramid. End-to-end tests, where service integration is also tested, requires putting in place the infrastructure, the services to be tested and the integrated services. Setting up a testing environment, test implementation and execution are significantly more complex than unit tests.

In addition to the cost of running these tests, another problem arises when a service changes the message format. Big bang deployment (deploying the service and its dependents at the same time) is to be avoided as this type of change breaks the continual deployment) . Therefore, for a period of time, the service provider has to offer support for two versions of the message while customers update to the new one, but consumer tests only look at one version of the producer.

At BBVA Labs, we conducted an experiment to reduce the number of services to deploy in tests and to ensure that communication among services from different domains is maintained throughout the software product’s life cycle in a continual deployment system. The decision was made to evaluate current tools to conduct Consumer Driven Contract testing (CDC testing o contract testing) for this experiment.

23 Oct 2017

Using Docker in the deployment of software in productive systems solves many problems related to agility and the normalization of these processes. But, like all technology that breaks with prior IT processes, it generates new challenges or requires different solutions for persisting problems. One of those is the management of secrets.

01 Oct 2017

27 Sep 2017

Serverless architecture, also known as FaaS (Functions as a Service) enables the execution of an application via ephemeral, stateless containers; these are created at the moment an event is produced that sets off this application. Contrary to what the term suggests, serverless does not mean “without a server.” Rather, these are used as an anonymous element of the infrastructure, supported by the advantages of cloud computing.
Here, leaving aside the hype that accompanies the term serverless, we explore in this post the possibilities it offers in architecture and applications development. We also study the principal alternatives for use in public and private clouds.

23 Feb 2015