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add docs for service.spec.allocateLoadBalancerNodePorts

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Signed-off-by: Andrew Sy Kim <kim.andrewsy@gmail.com>
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Andrew Sy Kim
2020-11-24 21:38:13 -05:00
parent e9ea77ef1e
commit acb476bec4
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content/en/docs/concepts/services-networking/service.md
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@@ -616,6 +616,17 @@ The set of protocols that can be used for LoadBalancer type of Services is still
{{< /note >}}
#### Disabling load balancer NodePort allocation {#load-balancer-nodeport-allocation}
{{< feature-state for_k8s_version="v1.20" state="alpha" >}}
Starting in v1.20, you can optionally disable node port allocation for a Service Type=LoadBalancer by setting
the field `spec.allocateLoadBalancerNodePorts` to `false`. This should only be used for load balancer implementations
that route traffic directly to pods as opposed to using node ports. By default, `spec.allocateLoadBalancerNodePorts`
is `true` and type LoadBalancer Services will continue to allocate node ports. If `spec.allocateLoadBalancerNodePorts`
is set to `false` on an existing Service with allocated node ports, those node ports will NOT be de-allocated automatically.
You must explicitly remove the `nodePorts` entry in every Service port to de-allocate those node ports.
You must enable the `ServiceLBNodePortControl` feature gate to use this field.
#### Internal load balancer