-
sceptre: Using Stack Outputs for Dependent CloudFormation Stacks
2 min read
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
Read more... -
OpenShift: disabling the web console
2 min read
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
Read more... -
Kubernetes: Operator vs Controller
2 min read
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
Read more... -
What's Immutable infrastructure?
2 min read
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
Read more... -
What's the difference between kubectl apply and kubectl replace?
2 min read
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
Read more...