• sceptre: Using Stack Outputs for Dependent CloudFormation Stacks

    2 min read

    sceptre stack_output AWS CloudFormation

    Sceptre is a command-line tool that allows you to manage AWS CloudFormation stacks. One of the features of sceptre is the ability to use stack outputs in other stacks, allowing you to create a dependent relationship between stacks, where one stack's output can be used as an input to another stack.

    30/01/2023

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  • OpenShift: disabling the web console

    2 min read

    OpenShift web console disable openshift-console

    When running an OpenShift cluster we'll find that it exposes a web-based console that not only allows you to deploy applications, but also managing the cluster. However, since it is an additional way to access the cluster we might have some concerns about it, specially from the security perspective. Specifically, the console can be a potential attack vector to gain unauthorized access to the cluster. Let's see how to disable it.

    26/01/2023

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  • Kubernetes: Operator vs Controller

    2 min read

    kubernetes operator controller difference

    In Kubernetes some times we talk about controllers and operators as if they are interchangeable. Some times they are, but there's a difference that in some cases makes it incorrect.

    25/01/2023

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  • What's Immutable infrastructure?

    2 min read

    immutable infrastructure benefits

    Immutable infrastructure is a method of managing infrastructure where resources are replaced, rather than modified. Being able to create new instances easily, servers become disposable: cattle, not pets.

    24/01/2023

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  • What's the difference between kubectl apply and kubectl replace?

    2 min read

    difference kubectl apply replace

    To update a kubernetes object we can use kubectl apply or kubectl replace, but depending on what and how we want it updated we need to use one or the other.

    23/01/2023

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