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+---
+layout: "google"
+page_title: "Google: google_autoscaler"
+sidebar_current: "docs-google-resource-autoscaler"
+description: |-
+ Managers an Instance Group within GCE.
+---
+
+# google\_autoscaler
+
+**Note**: This resource is in
+[beta](https://cloud.google.com/terms/launch-stages).
+
+A Compute Engine Autoscaler automatically adds or removes virtual machines from
+a managed instance group based on increases or decreases in load. This allows
+your applications to gracefully handle increases in traffic and reduces cost
+when the need for resources is lower. You just define the autoscaling policy and
+the autoscaler performs automatic scaling based on the measured load. For more
+information, see [the official
+documentation](https://cloud.google.com/compute/docs/autoscaler/) and
+[API](https://cloud.google.com/compute/docs/autoscaler/v1beta2/autoscalers)
+
+
+## Example Usage
+
+```
+resource "google_compute_instance_template" "foobar" {
+ name = "foobar"
+ machine_type = "n1-standard-1"
+ can_ip_forward = false
+ tags = ["foo", "bar"]
+
+ disk {
+ source_image = "debian-cloud/debian-7-wheezy-v20140814"
+ }
+
+ network_interface {
+ network = "default"
+ }
+
+ metadata {
+ foo = "bar"
+ }
+
+ service_account {
+ scopes = ["userinfo-email", "compute-ro", "storage-ro"]
+ }
+}
+
+resource "google_compute_target_pool" "foobar" {
+ name = "foobar"
+}
+
+resource "google_replicapool_instance_group_manager" "foobar" {
+ name = "foobar"
+ instance_template = "${google_compute_instance_template.foobar.self_link}"
+ target_pools = ["${google_compute_target_pool.foobar.self_link}"]
+ base_instance_name = "foobar"
+ zone = "us-central1-f"
+}
+
+resource "google_autoscaler" "foobar" {
+ name = "foobar"
+ zone = "us-central1-f"
+ target = "${google_replicapool_instance_group_manager.foobar.self_link}"
+ autoscaling_policy = {
+ max_replicas = 5
+ min_replicas = 1
+ cooldown_period = 60
+ cpu_utilization = {
+ target = 0.5
+ }
+ }
+}
+```
+
+## Argument Refernce
+
+The following arguments are supported:
+
+* `description` - (Optional) An optional textual description of the instance
+group manager.
+
+* `target` - (Required) The full URL to the instance group manager whose size we
+ control.
+
+* `autoscaling_policy.` - (Required) The parameters of the autoscaling
+ algorithm. Structure is documented below.
+
+* `zone` - (Required) The zone of the target.
+
+The `autoscaling_policy` block contains:
+
+* `max_replicas` - (Required) The group will never be larger than this.
+
+* `min_replicas` - (Required) The group will never be smaller than this.
+
+* `cooldown_period` - (Optional) Period to wait between changes. This should be
+ at least double the time your instances take to start up.
+
+* `cpu_utilization` - (Optional) A policy that scales when the cluster's average
+ CPU is above or below a given threshold. Structure is documented below.
+
+* `metric` - (Optional) A policy that scales according to Google Cloud
+ Monitoring metrics Structure is documented below.
+
+* `load_balancing_utilization` - (Optional) A policy that scales when the load
+ reaches a proportion of a limit defined in the HTTP load balancer. Structure
+is documented below.
+
+The `cpu_utilization` block contains:
+
+* `target` - The floating point threshold where CPU utilization should be. E.g.
+ for 50% one would specify 0.5.
+
+The `metric` block contains (more documentation
+[here](https://cloud.google.com/monitoring/api/metrics)):
+
+* `name` - The name of the Google Cloud Monitoring metric to follow, e.g.
+ compute.googleapis.com/instance/network/received_bytes_count
+
+* `type` - Either "cumulative", "delta", or "gauge".
+
+* `target` - The desired metric value per instance. Must be a positive value.
+
+The `load_balancing_utilization` block contains:
+
+* `target` - The floating point threshold where load balancing utilization
+ should be. E.g. if the load balancer's `maxRatePerInstance` is 10 requests
+ per second (RPS) then setting this to 0.5 would cause the group to be scaled
+ such that each instance receives 5 RPS.
+
+
+## Attributes Reference
+
+The following attributes are exported:
+
+* `self_link` - The URL of the created resource.
diff --git a/r/replicapool_instance_group_manager.html.markdown b/r/replicapool_instance_group_manager.html.markdown
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+---
+layout: "google"
+page_title: "Google: google_replicapool_instance_group_manager"
+sidebar_current: "docs-google-resource-instance_group_manager"
+description: |-
+ Manages an Instance Group within GCE.
+---
+
+# google\_replicapool\_instance\_group\_manager
+
+**Note**: This resource is in
+[beta](https://cloud.google.com/terms/launch-stages).
+
+The Google Compute Engine Instance Group Manager API creates and manages pools
+of homogeneous Compute Engine virtual machine instances from a common instance
+template. For more information, see [the official documentation](https://cloud.google.com/compute/docs/instance-groups/manager
+and [API](https://cloud.google.com/compute/docs/instance-groups/manager/v1beta2/instanceGroupManagers)
+
+## Example Usage
+
+```
+resource "google_replicapool_instance_group_manager" "foobar" {
+ description = "Terraform test instance group manager"
+ name = "terraform-test"
+ instance_template = "${google_compute_instance_template.foobar.self_link}"
+ target_pools = ["${google_compute_target_pool.foobar.self_link}"]
+ base_instance_name = "foobar"
+ zone = "us-central1-a"
+ target_size = 2
+}
+```
+
+## Argument Refernce
+
+The following arguments are supported:
+
+* `base_instance_name` - (Required) The base instance name to use for
+instances in this group. The value must be a valid [RFC1035](https://www.ietf.org/rfc/rfc1035.txt) name.
+Supported characters are lowercase letters, numbers, and hyphens (-). Instances
+are named by appending a hyphen and a random four-character string to the base
+instance name.
+
+* `description` - (Optional) An optional textual description of the instance
+group manager.
+
+* `instance_template` - (Required) The full URL to an instance template from
+which all new instances will be created.
+
+* `name` - (Required) The name of the instance group manager. Must be 1-63
+characters long and comply with [RFC1035](https://www.ietf.org/rfc/rfc1035.txt).
+Supported characters include lowercase letters, numbers, and hyphens.
+
+* `target_size` - (Optional) If not given at creation time, this defaults to 1. Do not specify this
+ if you are managing the group with an autoscaler, as this will cause fighting.
+
+* `target_pools` - (Required) The full URL of all target pools to which new
+instances in the group are added. Updating the target pool values does not
+affect existing instances.
+
+* `zone` - (Required) The zone that instances in this group should be created in.
+
+## Attributes Reference
+
+The following attributes are exported:
+
+* `group` - The full URL of the instance group created by the manager.
+
+* `self_link` - The URL of the created resource.