$ gcloud alpha compute instance-groups unmanaged add-instances \
    my-group \
    --instances my-instance-1,my-instance-2 --zone us-central1-a

POSITIONAL ARGUMENTS

NAME

Name of the instance group to operate on.

REQUIRED FLAGS

--instances=INSTANCE,[INSTANCE,...]

A list of names of instances to add to the instance group. These must exist beforehand and must live in the same zone as the instance group.

OPTIONAL FLAGS

--zone=ZONE

Zone of the instance group to operate on. If not specified and the compute/zone property isn't set, you may 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.

GCLOUD WIDE FLAGS

NOTES

$ gcloud compute instance-groups unmanaged add-instances $ gcloud beta compute instance-groups unmanaged add-instances