gcloud compute instance-groups managed abandon-instances - abandon instances owned by a managed instance group
gcloud compute instance-groups managed abandon-instances NAME --instances INSTANCE,[INSTANCE,...] [--zone ZONE] [GLOBAL-FLAG ...]
gcloud compute instance-groups managed abandon-instances abandons one or more instances from a managed instance group, thereby reducing the targetSize of the group. Once instances have been abandoned, the currentSize of the group is automatically reduced as well to reflect the change.
Abandoning an instance does not delete the underlying virtual machine instances, but just removes the instances from the instance group. If you would like the delete the underlying instances, use the delete-instances command instead.
NAMEThe managed instance group name.
--instances INSTANCE,[INSTANCE,...]Names of instances to abandon.
--zone ZONEThe zone of the instance group manager to abandon instances. If not specified, you will be prompted to select a zone.
To avoid prompting when this flag is omitted, you can set the compute/zone property:
$ gcloud config set compute/zone ZONE
A list of zones can be fetched by running:
$ gcloud compute zones list
To unset the property, run:
$ gcloud config unset compute/zone
Alternatively, the zone can be stored in the environment variable CLOUDSDK_COMPUTE_ZONE.
Run $ gcloud help for a description of flags available to all commands.