import type { MetadataBearer as __MetadataBearer } from "@smithy/types";
import type { AttachInstancesQuery } from "../models/models_0";
/**
 * @public
 */
export type { __MetadataBearer };
/**
 * @public
 *
 * The input for {@link AttachInstancesCommand}.
 */
export interface AttachInstancesCommandInput extends AttachInstancesQuery {
}
/**
 * @public
 *
 * The output of {@link AttachInstancesCommand}.
 */
export interface AttachInstancesCommandOutput extends __MetadataBearer {
}
declare const AttachInstancesCommand_base: {
    new (input: AttachInstancesCommandInput): import("@smithy/core/client").CommandImpl<AttachInstancesCommandInput, AttachInstancesCommandOutput, import("..").AutoScalingClientResolvedConfig, import("..").ServiceInputTypes, import("..").ServiceOutputTypes>;
    new (input: AttachInstancesCommandInput): import("@smithy/core/client").CommandImpl<AttachInstancesCommandInput, AttachInstancesCommandOutput, import("..").AutoScalingClientResolvedConfig, import("..").ServiceInputTypes, import("..").ServiceOutputTypes>;
    getEndpointParameterInstructions(): import("@smithy/types").EndpointParameterInstructions;
};
/**
 * <p>Attaches one or more EC2 instances to the specified Auto Scaling group.</p>
 *          <p>When you attach instances, Amazon EC2 Auto Scaling increases the desired capacity of the group by the
 *             number of instances being attached. If the number of instances being attached plus the
 *             desired capacity of the group exceeds the maximum size of the group, the operation
 *             fails.</p>
 *          <p>If there is a Classic Load Balancer attached to your Auto Scaling group, the instances are
 *             also registered with the load balancer. If there are target groups attached to your Auto Scaling
 *             group, the instances are also registered with the target groups.</p>
 *          <p>For more information, see <a href="https://docs.aws.amazon.com/autoscaling/ec2/userguide/ec2-auto-scaling-detach-attach-instances.html">Detach
 *                 or attach instances</a> in the <i>Amazon EC2 Auto Scaling User Guide</i>.</p>
 * @example
 * Use a bare-bones client and the command you need to make an API call.
 * ```javascript
 * import { AutoScalingClient, AttachInstancesCommand } from "@aws-sdk/client-auto-scaling"; // ES Modules import
 * // const { AutoScalingClient, AttachInstancesCommand } = require("@aws-sdk/client-auto-scaling"); // CommonJS import
 * // import type { AutoScalingClientConfig } from "@aws-sdk/client-auto-scaling";
 * const config = {}; // type is AutoScalingClientConfig
 * const client = new AutoScalingClient(config);
 * const input = { // AttachInstancesQuery
 *   InstanceIds: [ // InstanceIds
 *     "STRING_VALUE",
 *   ],
 *   AutoScalingGroupName: "STRING_VALUE", // required
 * };
 * const command = new AttachInstancesCommand(input);
 * const response = await client.send(command);
 * // {};
 *
 * ```
 *
 * @param AttachInstancesCommandInput - {@link AttachInstancesCommandInput}
 * @returns {@link AttachInstancesCommandOutput}
 * @see {@link AttachInstancesCommandInput} for command's `input` shape.
 * @see {@link AttachInstancesCommandOutput} for command's `response` shape.
 * @see {@link AutoScalingClientResolvedConfig | config} for AutoScalingClient's `config` shape.
 *
 * @throws {@link ResourceContentionFault} (server fault)
 *  <p>You already have a pending update to an Amazon EC2 Auto Scaling resource (for example, an Auto Scaling group,
 *             instance, or load balancer).</p>
 *
 * @throws {@link ServiceLinkedRoleFailure} (server fault)
 *  <p>The service-linked role is not yet ready for use.</p>
 *
 * @throws {@link AutoScalingServiceException}
 * <p>Base exception class for all service exceptions from AutoScaling service.</p>
 *
 *
 * @example To attach an instance to an Auto Scaling group
 * ```javascript
 * // This example attaches the specified instance to the specified Auto Scaling group.
 * const input = {
 *   AutoScalingGroupName: "my-auto-scaling-group",
 *   InstanceIds: [
 *     "i-93633f9b"
 *   ]
 * };
 * const command = new AttachInstancesCommand(input);
 * const response = await client.send(command);
 * /* response is
 * { /* metadata only *\/ }
 * *\/
 * ```
 *
 * @public
 */
export declare class AttachInstancesCommand extends AttachInstancesCommand_base {
    /** @internal type navigation helper, not in runtime. */
    protected static __types: {
        api: {
            input: AttachInstancesQuery;
            output: {};
        };
        sdk: {
            input: AttachInstancesCommandInput;
            output: AttachInstancesCommandOutput;
        };
    };
}