Hack SmartDataCenter's CNAPI (historically this chunk of functionality was called DAPI) to allow "customer" provisioning (i.e. via cloudapi) on the headnode for dev/testing.

hack.bash

function hack_dapi_for_headnode_provisioning {
    local cnapi_zone=\$(vmadm lookup -1 alias=cnapi0)
    # TODO: don't change if already done
    echo "# Hack DAPI to allow headnode provisioning"
    local config_path=/zones/\$cnapi_zone/root/opt/smartdc/cnapi/sapi_manifests/cnapi/template
    sed -e "
        s:hard-filter-headnode:identity:g;
        s:hard-filter-min-ram:identity:g;
        s:hard-filter-min-disk:identity:g;
        s:hard-filter-min-cpu:identity:g;
        " \$config_path >\$config_path.new
    mv \$config_path.new \$config_path
    svcadm -z \$cnapi_zone restart config-agent
}