amazon-eks-ami VS SonarQube

Careful assuming system reserved will be present. Last I checked, AWS EKS does not have system reserved resources for the kubelet by default and as a result, pods can starve those for resources (e.g., https://github.com/awslabs/amazon-eks-ami/issues/79). This is of course more important for memory, but could impact CPU as well.

For example, this is available for AL2: https://github.com/awslabs/amazon-eks-ami

I found this document that lists the pod limits per node size. I suspect you will want to consider larger worker nodes or you will very quickly be unable to schedule additional workloads.

source

Issue 1 is a known issue due to memory reservation being to low, see e.g. https://github.com/awslabs/amazon-eks-ami/issues/1145

No, the new node is added if there are not enough resiurces to start a new pod. So if you have many pods with small resource usage you can hit the pod per node limit, on eks you have a max number of pods depending on the instance type - https://github.com/awslabs/amazon-eks-ami/blob/master/files/eni-max-pods.txt You can incerase that limit : https://docs.aws.amazon.com/eks/latest/userguide/cni-increase-ip-addresses.html

# of pods are essentially capped by the worker node choice.

below excerpt from: https://github.com/awslabs/amazon-eks-ami/blob/master/files/...

  # Mapping is calculated from AWS EC2 API using the following formula:

See also: EKS nodes lose readiness when containers exhaust memory

So it manifests itself in this way: your pod is scheduled but remains pending forever. You check the logs and you see that it's complaining that the an IP address. Ultimately, if you check here, you see the maximum number of pods that can be scheduled on any underlying ec2 instance, even if you have remaining IPs in your subnet. I found this to be one of the most poorly understood phenomena in EKS. Even those who claimed to "crack" it and wrote fancy blog posts about it fundamentally got it wrong. AFAIK this document reflects the official AWS guide on how to mitigate this.

2. SonarQube: https://github.com/SonarSource/sonarqube SonarQube enhances code quality and security. It performs automatic reviews to detect bugs, vulnerabilities, and code smells in your code.

SonarQube (Scroll down to the Sonarqube section to see instructions on how to set up and configure SonarQube manually)

SonarQube https://www.sonarqube.org/

There are commercial tools that can be integrated into a CI pipeline and/or a developer's IDE. I've used SonarQube before, but there are others.

having a code review and analysis tool in CI/CD pipeline can help developers to keep their code clean. some examples of these tools are sonarqube and embold.

But back in 2012, tech debt-related tools were in their infancy. JetBrains released IntelliJ IDEA in 2000, and SonarQube was initially released in 2006. Stepsize started in 2015, and Visual studio intellicode wasn't made by Microsoft until 2018.

Sonarqube Source Code Repository