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Indentify whether we are running an spot instance using AWS CLI
2 min read
On a running instance we might want to be able to identify whether it is a spot or on demand instance. We can use awscli to identify it
23/05/2022
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Pulling images from ECR on Kubernetes
2 min read
If you are getting the HTTP 403 (Forbidden) error or the error message no basic auth credentials when trying to pull an image from ECR you are most likely doing so without logging into it first.
18/05/2022
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AWS EKS: reduce the number of reserved IPs
4 min read
If you are trying to run a EKS cluster on a small subnet you might run out of IPs sooner that you might think. Every time it has to attach or detach IPs an API call needs to be made, so to avoid getting API calls throttled it pre-reserves some
16/05/2022
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Kubernetes: How to identify when and how an object has been modified
3 min read
In the same way we can use git blame to identify who and when has modified a specific line, with kubectl blame we'll be able to do the same to Kubernetes objects
13/05/2022
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Java: JVM DNS cache settings
2 min read
One of the annoyances of running workloads in a JVM is taking into account that it has it's own DNS cache: It's easy to forgot about it when troubleshooting an issue so we might end up not understanding the problem at all
11/05/2022
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