[Suggestion] - Making service sessionAffinity configurable about data-center-helm-charts

[nanux]

Hi @smarch730, can you please elaborate a bit about your network setup?

My understanding is that you are using ALB Ingress Controller. Did you also setup its session affinity annotations within Ingress object? For Nginx we define these (Nginx specific):

"nginx.ingress.kubernetes.io/affinity": "cookie"
"nginx.ingress.kubernetes.io/affinity-mode": "persistent"

I believe for ALB you will need to include similar annotations. Or do you change some other parts of the helm chart that solved the problem for you?

If you can share your setup - values.yaml file (redact any sensitive information) and also the change that helped you to solve the problem, it would be easier to discuss the suggestion in detail.

Thank you

[smarch730]

Hi nanux, thanks for your reply.

I did look through the annotations for the controller and did not see anything similar to nginx controllers afiinity options. After further reading of the aws documentation on the AWS Load Balancer controller I noticed one line I previously missed:

"ip mode is required for sticky sessions to work with Application Load Balancers."
ref - https://kubernetes-sigs.github.io/aws-load-balancer-controller/v2.2/guide/ingress/annotations/#target-type

My build still had targetType of 'instance' set, and one idea I had to fix this was to change it at the service level (as states in my orignal comment). Changing my instance type to IP fixed the session problems.

Cheers.