register-instances-with-load-balancer¶

Description¶

Adds the specified instances to the specified load balancer.

The instance must be a running instance in the same network as the load balancer (EC2-Classic or the same VPC). If you have EC2-Classic instances and a load balancer in a VPC with ClassicLink enabled, you can link the EC2-Classic instances to that VPC and then register the linked EC2-Classic instances with the load balancer in the VPC.

Note that RegisterInstanceWithLoadBalancer completes when the request has been registered. Instance registration takes a little time to complete. To check the state of the registered instances, use DescribeLoadBalancers or DescribeInstanceHealth .

After the instance is registered, it starts receiving traffic and requests from the load balancer. Any instance that is not in one of the Availability Zones registered for the load balancer is moved to the OutOfService state. If an Availability Zone is added to the load balancer later, any instances registered with the load balancer move to the InService state.

To deregister instances from a load balancer, use DeregisterInstancesFromLoadBalancer .

For more information, see Register or De-Register EC2 Instances in the Classic Load Balancers Guide .

Synopsis¶

  register-instances-with-load-balancer
--load-balancer-name <value>
--instances <value>
[--cli-input-json | --cli-input-yaml]
[--generate-cli-skeleton <value>]

Options¶

--load-balancer-name (string)

The name of the load balancer.

--instances (list)

The IDs of the instances.

(structure)

The ID of an EC2 instance.

InstanceId -> (string)

The instance ID.

Shorthand Syntax:

--instances InstanceId1 InstanceId2 InstanceId3

JSON Syntax:

[
  {
    "InstanceId": "string"
  }
  ...
]

--cli-input-json | --cli-input-yaml (string) Reads arguments from the JSON string provided. The JSON string follows the format provided by --generate-cli-skeleton. If other arguments are provided on the command line, those values will override the JSON-provided values. It is not possible to pass arbitrary binary values using a JSON-provided value as the string will be taken literally. This may not be specified along with --cli-input-yaml.

--generate-cli-skeleton (string) Prints a JSON skeleton to standard output without sending an API request. If provided with no value or the value input, prints a sample input JSON that can be used as an argument for --cli-input-json. Similarly, if provided yaml-input it will print a sample input YAML that can be used with --cli-input-yaml. If provided with the value output, it validates the command inputs and returns a sample output JSON for that command. The generated JSON skeleton is not stable between versions of the AWS CLI and there are no backwards compatibility guarantees in the JSON skeleton generated.

See ‘aws help’ for descriptions of global parameters.

Examples¶

Note

To use the following examples, you must have the AWS CLI installed and configured. See the Getting started guide in the AWS CLI User Guide for more information.

Unless otherwise stated, all examples have unix-like quotation rules. These examples will need to be adapted to your terminal’s quoting rules. See Using quotation marks with strings in the AWS CLI User Guide .

To register instances with a load balancer

This example registers the specified instance with the specified load balancer.

Command:

aws elb register-instances-with-load-balancer --load-balancer-name my-load-balancer --instances i-d6f6fae3

Output:

{
   "Instances": [
       {
           "InstanceId": "i-d6f6fae3"
       },
       {
           "InstanceId": "i-207d9717"
       },
       {
           "InstanceId": "i-afefb49b"
       }
   ]
}

Output¶

Instances -> (list)

The updated list of instances for the load balancer.

(structure)

The ID of an EC2 instance.

InstanceId -> (string)

The instance ID.

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