Configurable log output for the aws-eks-nodeagent in the daemonset

[OcamsRazor]

What would you like to be added:

Hi, I'm wondering if it would be possible to add support for the --log-file argument on the aws-eks-nodeagent container to set /dev/stdout as the log output.
I have found following comment aws/aws-network-policy-agent#50 (comment) but seems this is not yet possible.

I'm deploying the VPC CNI using TF (aws_eks_addon). Is the JSON schema that is used for configuration generated based on the values.yaml file of this chart ?

Why is this needed:

Agent logs and policy decision logs are by default stored in /var/log/aws-routed-eni/network-policy-agent.log. For log scraping with e.g. fluent-bit, pods need to be privileged to gain access to the log file.
Writing logs to stdout would enable standard log tooling to be used

Thanks

[orsenthil]

The flag https://github.com/aws/aws-network-policy-agent/blob/main/pkg/config/controller_config.go#L10 is configurable via --log-file. It looks like we aren't exposing this in the helm chart here - https://github.com/aws/amazon-vpc-cni-k8s/tree/master/charts/aws-vpc-cni

This needs to be added.

[orsenthil]

This PR will resolve this - #2925

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