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community.google.gce_mig module – Create, Update or Destroy a Managed Instance Group (MIG).

Note

This module is part of the community.google collection (version 1.0.0).

You might already have this collection installed if you are using the ansible package. It is not included in ansible-core. To check whether it is installed, run ansible-galaxy collection list.

To install it, use: ansible-galaxy collection install community.google.

To use it in a playbook, specify: community.google.gce_mig.

Synopsis

• Create, Update or Destroy a Managed Instance Group (MIG). See https://cloud.google.com/compute/docs/instance-groups for an overview. Full install/configuration instructions for the gce* modules can be found in the comments of ansible/test/gce_tests.py.

Requirements

The below requirements are needed on the host that executes this module.

• python >= 2.6

• apache-libcloud >= 1.2.0

Parameters

Parameter	Comments
autoscaling dictionary	A dictionary of configuration for the autoscaler. ‘enabled (bool)’, ‘name (str)’ and policy.max_instances (int) are required fields if autoscaling is used. See https://cloud.google.com/compute/docs/reference/beta/autoscalers for more information on Autoscaling.
credentials_file path	Path to the JSON file associated with the service account email
name string / required	Name of the Managed Instance Group.
named_ports list / elements=string	Define named ports that backend services can forward data to. Format is a a list of name:port dictionaries.
pem_file path	path to the pem file associated with the service account email This option is deprecated. Use ‘credentials_file’.
project_id string	GCE project ID
recreate_instances boolean	Recreate MIG instances. Choices: no ← (default) yes
service_account_email string	service account email
service_account_permissions list / elements=string	service account permissions
size integer	Size of Managed Instance Group. If MIG already exists, it will be resized to the number provided here. Required for creating MIGs.
state string	desired state of the resource Choices: absent present ← (default)
template string	Instance Template to be used in creating the VMs. See https://cloud.google.com/compute/docs/instance-templates to learn more about Instance Templates. Required for creating MIGs.
zone string / required	The GCE zone to use for this Managed Instance Group.

Notes

Note

• Resizing and Recreating VM are also supported.

• An existing instance template is required in order to create a Managed Instance Group.

Examples

# Following playbook creates, rebuilds instances, resizes and then deletes a MIG.
# Notes:
# - Two valid Instance Templates must exist in your GCE project in order to run
#   this playbook.  Change the fields to match the templates used in your
#   project.
# - The use of the 'pause' module is not required, it is just for convenience.
- name: Managed Instance Group Example
  hosts: localhost
  gather_facts: False
  tasks:
    - name: Create MIG
      community.google.gce_mig:
        name: ansible-mig-example
        zone: us-central1-c
        state: present
        size: 1
        template: my-instance-template-1
        named_ports:
        - name: http
          port: 80
        - name: foobar
          port: 82

    - name: Pause for 30 seconds
      ansible.builtin.pause:
        seconds: 30

    - name: Recreate MIG Instances with Instance Template change.
      community.google.gce_mig:
        name: ansible-mig-example
        zone: us-central1-c
        state: present
        template: my-instance-template-2-small
        recreate_instances: yes

    - name: Pause for 30 seconds
      ansible.builtin.pause:
        seconds: 30

    - name: Resize MIG
      community.google.gce_mig:
        name: ansible-mig-example
        zone: us-central1-c
        state: present
        size: 3

    - name: Update MIG with Autoscaler
      community.google.gce_mig:
        name: ansible-mig-example
        zone: us-central1-c
        state: present
        size: 3
        template: my-instance-template-2-small
        recreate_instances: yes
        autoscaling:
          enabled: yes
          name: my-autoscaler
          policy:
            min_instances: 2
            max_instances: 5
            cool_down_period: 37
            cpu_utilization:
              target: .39
            load_balancing_utilization:
              target: 0.4

    - name: Pause for 30 seconds
      ansible.builtin.pause:
        seconds: 30

    - name: Delete MIG
      community.google.gce_mig:
        name: ansible-mig-example
        zone: us-central1-c
        state: absent
        autoscaling:
          enabled: no
          name: my-autoscaler

Return Values

Common return values are documented here, the following are the fields unique to this module:

Key	Description
created_autoscaler boolean	True if Autoscaler was attempted and created. False otherwise. Returned: When the creation of an Autoscaler was attempted. Sample: true
created_instances list / elements=string	Names of instances created. Returned: When instances are created. Sample: [“ansible-mig-new-0k4y”, “ansible-mig-new-0zk5”, “ansible-mig-new-kp68”]
deleted_autoscaler boolean	True if an Autoscaler delete attempted and succeeded. False returned if delete failed. Returned: When the delete of an Autoscaler was attempted. Sample: true
deleted_instances list / elements=string	Names of instances deleted. Returned: When instances are deleted. Sample: [“ansible-mig-new-0k4y”, “ansible-mig-new-0zk5”, “ansible-mig-new-kp68”]
name string	Name of the Managed Instance Group. Returned: changed Sample: “my-managed-instance-group”
named_ports list / elements=string	list of named ports acted upon Returned: when named_ports are initially set or updated Sample: [{“name”: “http”, “port”: 80}, {“name”: “foo”, “port”: 82}]
recreated_instances list / elements=string	Names of instances recreated. Returned: When instances are recreated. Sample: [“ansible-mig-new-0k4y”, “ansible-mig-new-0zk5”, “ansible-mig-new-kp68”]
resize_created_instances list / elements=string	Names of instances created during resizing. Returned: When a resize results in the creation of instances. Sample: [“ansible-mig-new-0k4y”, “ansible-mig-new-0zk5”, “ansible-mig-new-kp68”]
resize_deleted_instances list / elements=string	Names of instances deleted during resizing. Returned: When a resize results in the deletion of instances. Sample: [“ansible-mig-new-0k4y”, “ansible-mig-new-0zk5”, “ansible-mig-new-kp68”]
set_named_ports boolean	True if the named_ports have been set Returned: named_ports have been set Sample: true
size integer	Number of VMs in Managed Instance Group. Returned: changed Sample: 4
template string	Instance Template to use for VMs. Must exist prior to using with MIG. Returned: changed Sample: “my-instance-template”
updated_autoscaler boolean	True if an Autoscaler update was attempted and succeeded. False returned if update failed. Returned: When the update of an Autoscaler was attempted. Sample: true
updated_named_ports boolean	True if the named_ports have been updated Returned: named_ports have been updated Sample: true
zone string	Zone in which to launch MIG. Returned: always Sample: “us-central1-b”

Authors

• Tom Melendez (@supertom)

Collection links

Issue Tracker Repository (Sources)