terraform/website/source/docs/providers/alicloud/r/eip_association.html.markdown

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---
layout: "alicloud"
page_title: "Alicloud: alicloud_eip_association"
sidebar_current: "docs-alicloud-resource-eip-association"
description: |-
Provides a ECS EIP Association resource.
---
# alicloud\_eip\_association
Provides an Alicloud EIP Association resource, to associate and disassociate Elastic IPs from ECS Instances.
~> **NOTE:** `alicloud_eip_association` is useful in scenarios where EIPs are either
pre-existing or distributed to customers or users and therefore cannot be changed.
In addition, it only supports ECS-VPC.
## Example Usage
```
# Create a new EIP association and use it to associate a EIP form a instance.
resource "alicloud_vpc" "vpc" {
cidr_block = "10.1.0.0/21"
}
resource "alicloud_vswitch" "vsw" {
vpc_id = "${alicloud_vpc.vpc.id}"
cidr_block = "10.1.1.0/24"
availability_zone = "cn-beijing-a"
depends_on = [
"alicloud_vpc.vpc"]
}
resource "alicloud_instance" "ecs_instance" {
image_id = "ubuntu_140405_64_40G_cloudinit_20161115.vhd"
instance_type = "ecs.s1.small"
availability_zone = "cn-beijing-a"
security_groups = ["${alicloud_security_group.group.id}"]
vswitch_id = "${alicloud_vswitch.vsw.id}"
instance_name = "hello"
instance_network_type = "vpc"
tags {
Name = "TerraformTest-instance"
}
}
resource "alicloud_eip" "eip" {
}
resource "alicloud_eip_association" "eip_asso" {
allocation_id = "${alicloud_eip.eip.id}"
instance_id = "${alicloud_instance.ecs_instance.id}"
}
resource "alicloud_security_group" "group" {
name = "terraform-test-group"
description = "New security group"
vpc_id = "${alicloud_vpc.vpc.id}"
}
```
## Argument Reference
The following arguments are supported:
* `allocation_id` - (Optional, Forces new resource) The allocation EIP ID.
* `instance_id` - (Optional, Forces new resource) The ID of the instance.
## Attributes Reference
The following attributes are exported:
* `allocation_id` - As above.
* `instance_id` - As above.