I'm trying to figure out the best way to secure communication between pods in my Kubernetes setup. Do people usually set up truststores or keystores for each service manually? I've seen some setups use TLS with sidecars or rely on network rules to control which pods can communicate. Currently, I'm handling it at the ingress level, but everything internal is using HTTP, which doesn't feel right for a production environment—right now, it's all just personal projects. What do others recommend for securing pod-to-pod communication in a production scenario?
3 Answers
I totally agree with looking into service meshes. Istio is a solid choice if you want something that manages connections and security seamlessly. Just be aware of the overhead it might introduce in terms of configuration.
I think it really depends on what your security needs are. For basic needs, just going with network policies to restrict traffic is pretty common. Many don’t even use encryption within the cluster because it can be overkill unless you're dealing with sensitive data.
We're using Cilium which handles pod-to-pod and node-to-node encryption through WireGuard. It cuts down on the complexity of traditional service meshes while providing secure communication. It's definitely something worth looking into.
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