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Proxy protocol enabled at random, bringing my site offline

Posted January 12, 2021 236 views
Kubernetes

My kubernetes cluster’s load balancer has, 3 times now, had proxy protocol turned on for no apparent reason.

This knocks the site offline with an SSL handshake error.

The issue is only fixed by going into the load balancer’s settings and disabling Proxy protocol.

What could be the cause of this?

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pfnsec
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pfnsec

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Purnima February 24, 2021

Hi @pfnsec

It looks like the proxy protocol is turned on automatically. Can you please confirm how you are turning off the proxy protocol in the LoadBalcner?

All loadbalancers provisioned by kubernetes are managed by the Cloud Controller Manager(CCM) running on the master. Any manual modifications to the LB through the cloud panel will be overwritten by the CCM during its reconciliation process to ensure the LB is configured properly with the state defined by the kubernetes service.

In order to configure your LB you need to use kubernetes service annotations. For information on how to apply annotations, you can use the command:

kubectl annotate –help

Docs for DO service annotations can be found here: https://www.digitalocean.com/docs/kubernetes/how-to/configure-load-balancers/

Service annotations can also be found on our public github repository:

https://github.com/digitalocean/digitalocean-cloud-controller-manager/blob/master/docs/controllers/services/annotations.md

I hope it helps!

Best Regards,
Purnima Kumari

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