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247 lines
9.6 KiB
Markdown
247 lines
9.6 KiB
Markdown
---
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layout: "google"
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page_title: "Google: google_compute_instance_group_manager"
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sidebar_current: "docs-google-compute-instance-group-manager"
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description: |-
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Manages an Instance Group within GCE.
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---
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# google\_compute\_instance\_group\_manager
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The Google Compute Engine Instance Group Manager API creates and manages pools
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of homogeneous Compute Engine virtual machine instances from a common instance
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template. For more information, see [the official documentation](https://cloud.google.com/compute/docs/instance-groups/manager)
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and [API](https://cloud.google.com/compute/docs/reference/latest/instanceGroupManagers)
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~> **Note:** Use [google_compute_region_instance_group_manager](/docs/providers/google/r/compute_region_instance_group_manager.html) to create a regional (multi-zone) instance group manager.
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## Example Usage with top level instance template (`google` provider)
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```hcl
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resource "google_compute_health_check" "autohealing" {
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name = "autohealing-health-check"
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check_interval_sec = 5
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timeout_sec = 5
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healthy_threshold = 2
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unhealthy_threshold = 10 # 50 seconds
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http_health_check {
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request_path = "/healthz"
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port = "8080"
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}
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}
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resource "google_compute_instance_group_manager" "appserver" {
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name = "appserver-igm"
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base_instance_name = "app"
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instance_template = "${google_compute_instance_template.appserver.self_link}"
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update_strategy = "NONE"
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zone = "us-central1-a"
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target_pools = ["${google_compute_target_pool.appserver.self_link}"]
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target_size = 2
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named_port {
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name = "customHTTP"
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port = 8888
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}
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auto_healing_policies {
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health_check = "${google_compute_health_check.autohealing.self_link}"
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initial_delay_sec = 300
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}
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}
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```
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## Example Usage with multiple versions (`google-beta` provider)
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```hcl
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resource "google_compute_instance_group_manager" "appserver" {
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provider = "google-beta"
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name = "appserver-igm"
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base_instance_name = "app"
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zone = "us-central1-a"
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target_size = 5
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version {
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name = "appserver"
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instance_template = "${google_compute_instance_template.appserver.self_link}"
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}
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version {
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name = "appserver-canary"
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instance_template = "${google_compute_instance_template.appserver-canary.self_link}"
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target_size {
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fixed = 1
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}
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}
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}
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```
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## Argument Reference
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The following arguments are supported:
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* `base_instance_name` - (Required) The base instance name to use for
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instances in this group. The value must be a valid
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[RFC1035](https://www.ietf.org/rfc/rfc1035.txt) name. Supported characters
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are lowercase letters, numbers, and hyphens (-). Instances are named by
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appending a hyphen and a random four-character string to the base instance
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name.
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* `instance_template` - (Required, [GA](https://terraform.io/docs/providers/google/provider_versions.html)) The
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full URL to an instance template from which all new instances
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will be created. This field is only present in the `google` provider.
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* `version` - (Required, [Beta](https://terraform.io/docs/providers/google/provider_versions.html)) Application versions managed by this instance group. Each
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version deals with a specific instance template, allowing canary release scenarios.
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Structure is documented below.
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* `name` - (Required) The name of the instance group manager. Must be 1-63
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characters long and comply with
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[RFC1035](https://www.ietf.org/rfc/rfc1035.txt). Supported characters
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include lowercase letters, numbers, and hyphens.
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* `zone` - (Required) The zone that instances in this group should be created
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in.
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- - -
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* `description` - (Optional) An optional textual description of the instance
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group manager.
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* `named_port` - (Optional) The named port configuration. See the section below
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for details on configuration.
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* `project` - (Optional) The ID of the project in which the resource belongs. If it
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is not provided, the provider project is used.
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* `update_strategy` - (Optional, Default `"REPLACE"`) If the `instance_template`
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resource is modified, a value of `"NONE"` will prevent any of the managed
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instances from being restarted by Terraform. A value of `"REPLACE"` will
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restart all of the instances at once. This field is only present in the
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`google` provider.
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* `target_size` - (Optional) The target number of running instances for this managed
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instance group. This value should always be explicitly set unless this resource is attached to
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an autoscaler, in which case it should never be set. Defaults to `0`.
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* `target_pools` - (Optional) The full URL of all target pools to which new
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instances in the group are added. Updating the target pools attribute does
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not affect existing instances.
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* `wait_for_instances` - (Optional) Whether to wait for all instances to be created/updated before
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returning. Note that if this is set to true and the operation does not succeed, Terraform will
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continue trying until it times out.
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---
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* `auto_healing_policies` - (Optional, [Beta](https://terraform.io/docs/providers/google/provider_versions.html)) The autohealing policies for this managed instance
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group. You can specify only one value. Structure is documented below. For more information, see the [official documentation](https://cloud.google.com/compute/docs/instance-groups/creating-groups-of-managed-instances#monitoring_groups).
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* `update_policy` - (Optional, [Beta](https://terraform.io/docs/providers/google/provider_versions.html)) The update policy for this managed instance group. Structure is documented below. For more information, see the [official documentation](https://cloud.google.com/compute/docs/instance-groups/updating-managed-instance-groups) and [API](https://cloud.google.com/compute/docs/reference/rest/beta/instanceGroupManagers/patch)
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- - -
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The `update_policy` block supports:
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```hcl
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update_policy{
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type = "PROACTIVE"
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minimal_action = "REPLACE"
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max_surge_percent = 20
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max_unavailable_fixed = 2
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min_ready_sec = 50
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}
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```
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* `minimal_action` - (Required) - Minimal action to be taken on an instance. Valid values are `"RESTART"`, `"REPLACE"`
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* `type` - (Required) - The type of update. Valid values are `"OPPORTUNISTIC"`, `"PROACTIVE"`
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* `max_surge_fixed` - (Optional), The maximum number of instances that can be created above the specified targetSize during the update process. Conflicts with `max_surge_percent`. If neither is set, defaults to 1
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* `max_surge_percent` - (Optional), The maximum number of instances(calculated as percentage) that can be created above the specified targetSize during the update process. Conflicts with `max_surge_fixed`.
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* `max_unavailable_fixed` - (Optional), The maximum number of instances that can be unavailable during the update process. Conflicts with `max_unavailable_percent`. If neither is set, defaults to 1
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* `max_unavailable_percent` - (Optional), The maximum number of instances(calculated as percentage) that can be unavailable during the update process. Conflicts with `max_unavailable_fixed`.
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* `min_ready_sec` - (Optional), Minimum number of seconds to wait for after a newly created instance becomes available. This value must be from range [0, 3600]
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- - -
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The `named_port` block supports: (Include a `named_port` block for each named-port required).
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* `name` - (Required) The name of the port.
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* `port` - (Required) The port number.
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- - -
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The `auto_healing_policies` block supports:
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* `health_check` - (Required) The health check resource that signals autohealing.
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* `initial_delay_sec` - (Required) The number of seconds that the managed instance group waits before
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it applies autohealing policies to new instances or recently recreated instances. Between 0 and 3600.
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The `version` block supports:
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```hcl
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version {
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name = "appserver-canary"
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instance_template = "${google_compute_instance_template.appserver-canary.self_link}"
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target_size {
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fixed = 1
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}
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}
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```
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```hcl
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version {
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name = "appserver-canary"
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instance_template = "${google_compute_instance_template.appserver-canary.self_link}"
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target_size {
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percent = 20
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}
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}
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```
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* `name` - (Required) - Version name.
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* `instance_template` - (Required) - The full URL to an instance template from which all new instances of this version will be created.
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* `target_size` - (Optional) - The number of instances calculated as a fixed number or a percentage depending on the settings. Structure is documented below.
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-> Exactly one `version` you specify must not have a `target_size` specified. During a rolling update, the instance group manager will fulfill the `target_size`
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constraints of every other `version`, and any remaining instances will be provisioned with the version where `target_size` is unset.
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The `target_size` block supports:
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* `fixed` - (Optional), The number of instances which are managed for this version. Conflicts with `percent`.
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* `percent` - (Optional), The number of instances (calculated as percentage) which are managed for this version. Conflicts with `fixed`.
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Note that when using `percent`, rounding will be in favor of explicitly set `target_size` values; a managed instance group with 2 instances and 2 `version`s,
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one of which has a `target_size.percent` of `60` will create 2 instances of that `version`.
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## Attributes Reference
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In addition to the arguments listed above, the following computed attributes are
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exported:
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* `fingerprint` - The fingerprint of the instance group manager.
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* `instance_group` - The full URL of the instance group created by the manager.
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* `self_link` - The URL of the created resource.
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## Import
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Instance group managers can be imported using the `name`, e.g.
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```
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$ terraform import google_compute_instance_group_manager.appserver appserver-igm
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```
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