Merge pull request #21418 from lnregalias/patch-1

Add info to `aws-load-balancer-security-groups` annotation

Author: k8s-ci-robot

content/en/docs/concepts/cluster-administration/cloud-providers.md

@@ -99,7 +99,7 @@ Different settings can be applied to a load balancer service in AWS using _annot
 * `service.beta.kubernetes.io/aws-load-balancer-connection-draining-timeout`: Used on the service to specify a connection draining timeout.
 * `service.beta.kubernetes.io/aws-load-balancer-connection-idle-timeout`: Used on the service to specify the idle connection timeout.
 * `service.beta.kubernetes.io/aws-load-balancer-cross-zone-load-balancing-enabled`: Used on the service to enable or disable cross-zone load balancing.
-* `service.beta.kubernetes.io/aws-load-balancer-security-groups`: Used to specify the security groups to be added to ELB created. This replaces all other security groups previously assigned to the ELB.
+* `service.beta.kubernetes.io/aws-load-balancer-security-groups`: Used to specify the security groups to be added to ELB created. This replaces all other security groups previously assigned to the ELB. Security groups defined here should not be shared between services.
 * `service.beta.kubernetes.io/aws-load-balancer-extra-security-groups`: Used on the service to specify additional security groups to be added to ELB created
 * `service.beta.kubernetes.io/aws-load-balancer-internal`: Used on the service to indicate that we want an internal ELB.
 * `service.beta.kubernetes.io/aws-load-balancer-proxy-protocol`: Used on the service to enable the proxy protocol on an ELB. Right now we only accept the value `*` which means enabling the proxy protocol on all ELB backends. In the future we could adjust this to allow setting the proxy protocol only on certain backends.
@@ -433,4 +433,4 @@ Alibaba Cloud does not require the format of node name, but the kubelet needs to
 
 ### Load Balancers  
 
-You can setup external load balancers to use specific features in Alibaba Cloud by configuring the [annotations](https://www.alibabacloud.com/help/en/doc-detail/86531.htm) .
+You can setup external load balancers to use specific features in Alibaba Cloud by configuring the [annotations](https://www.alibabacloud.com/help/en/doc-detail/86531.htm) .