Here’s how to move a VM instance from one zone to another. Moving an instance will involve destroying the instance from the source zone, and then recreating a replacement instance in the destination zone. To make the move easier, we will use a machine image to recreate the instance. We will also take advantage of the compute and IP address reservations to guarantee that we use the same IP address machine type. Some large machine types are hard to come by.
Get a list of compute and IP reservations.
gcloud compute addresses list gcloud compute reservations list
gcloud compute addresses create centos-ip-reservation --addresses 10.128.15.216 --region us-central1 --subnet default gcloud compute reservations create centos-us-central1-b --machine-type=n1-standard-1 --vm-count=1 --zone us-central1-b
Create a machine image.
gcloud compute instances stop centos gcloud beta compute machine-images create centos-image-00 --source-instance centos
Delete original instance.
gcloud compute instances delete centos
Create an instance from image in the new zone. Use the compute and ip reservations previously made.
gcloud beta compute instances create centos \ --no-address \ --private-network-ip 10.128.15.216 \ --source-machine-image=centos-image-00 \ --subnet=https://www.googleapis.com/compute/v1/projects/airy-totality-151318/regions/us-central1/subnetworks/default \ --machine-type=n1-standard-1 \ --reservation-affinity=any \ --reservation=centos-us-central1-b \ --zone=us-central1-b
Finally, clean it up once you are done.
gcloud compute instances delete centos --zone us-central1-b gcloud compute addresses delete centos-ip-reservation gcloud compute reservations delete centos-us-central1-b --zone us-central1-b gcloud beta compute machine-images delete centos-image-00