disable-zones

The multipass disable-zones command makes one or more availability zones unavailable, simulating a loss of availability on a cloud provider. Instances in the affected zones are forcefully switched off, and Multipass refuses to launch new instances into the zone, until it is re-enabled with multipass enable-zones.

Pass one or more zone names as arguments, or use --all to disable every zone at once:

multipass disable-zones zone2

Since this forcefully stops any running instances in the zone, Multipass asks for confirmation before proceeding:

This operation will forcefully stop the VMs in zone2. Are you sure you want to continue? (Yes/no)

Zone disabled: zone2

Use the --force option to skip the confirmation prompt. This is required if the command is run non-interactively (i.e. with either standard input or standard output being redirected), since there is no way to query the user for confirmation in that case.

The full multipass help disable-zones output explains the available options:

Usage: multipass disable-zones [options] <zone> [<zone> ...]
Makes the given availability zones unavailable. Instances therein are
forcefully switched off and remain unavailable until their zone is
re-enabled (simulating a loss of availability on a cloud provider).

Options:
  -h, --help     Displays help on commandline options
  -v, --verbose  Increase logging verbosity. Repeat the 'v' in the short
                option for more detail. Maximum verbosity is obtained with
                4 (or more) v's, i.e. -vvvv.
  --all          Disable all zones
  --force        Do not ask for confirmation

Arguments:
  zone           Name of the zones to make unavailable