zalando-incubator / kube-ingress-aws-controller / 8900245155

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Feature: nlb zone affinity via r53 (#694)

* feature: set nlb zone affinity for clients

This enables you to set dns_record.client_routing_policy configuration, such that you can decide for NLB via R53 feature that clients running in the same zone will hit also the same zone of your NLB. This is interesting for cross cluster traffic or traffic that stays in the same cluster but passes the NLB. Valid configurations are:
- availability_zone_affinity
- partial_availability_zone_affinity
- any_availability_zone (default)

see also https://docs.aws.amazon.com/elasticloadbalancing/latest/network/network-load-balancers.html\#load-balancer-attributes and https://docs.aws.amazon.com/elasticloadbalancing/latest/network/network-load-balancers.html\#zonal-dns-affinity

Signed-off-by: Sandor Szücs <sandor.szuecs@zalando.de>

* log: log default cross zone and zone affinity config

Signed-off-by: Sandor Szücs <sandor.szuecs@zalando.de>

* fix: comments

Signed-off-by: Sandor Szücs <sandor.szuecs@zalando.de>

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Signed-off-by: Sandor Szücs <sandor.szuecs@zalando.de>

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