Replace linkerd as service mesh solution in the cluster

[ricsanfre]

Scope

Evaluate service mesh solution alternatives to replace linkerd. Due to the recent announce from linkerd main maintaner, Buyoyant, of not maintaining stables releases anymore starting from release 2.15 (https://linkerd.io/2024/02/21/announcing-linkerd-2.15/#a-new-model-for-stable-releases).

Requirements

• Deploy a service mesh solution for the cluster

Possible alternatives

• Istio

[ricsanfre]

Cilium CNI kube-proxy replacement might impact Istio integration if not configured properly

• https://www.solo.io/blog/istio-cilium-kube-proxy-replacement/
• https://docs.cilium.io/en/latest/network/servicemesh/istio/

[ricsanfre]

Istio Ambient mode (sidecarless) in beta since 1.22. See istio 1.22 announcement