one/src/cli/onevm

#!/usr/bin/env ruby

# -------------------------------------------------------------------------- #
# Copyright 2002-2015, OpenNebula Project, OpenNebula Systems                #
#                                                                            #
# Licensed under the Apache License, Version 2.0 (the "License"); you may    #
# not use this file except in compliance with the License. You may obtain    #
# a copy of the License at                                                   #
#                                                                            #
# http://www.apache.org/licenses/LICENSE-2.0                                 #
#                                                                            #
# Unless required by applicable law or agreed to in writing, software        #
# distributed under the License is distributed on an "AS IS" BASIS,          #
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.   #
# See the License for the specific language governing permissions and        #
# limitations under the License.                                             #
#--------------------------------------------------------------------------- #

ONE_LOCATION=ENV["ONE_LOCATION"]

if !ONE_LOCATION
    RUBY_LIB_LOCATION="/usr/lib/one/ruby"
else
    RUBY_LIB_LOCATION=ONE_LOCATION+"/lib/ruby"
end

$: << RUBY_LIB_LOCATION
$: << RUBY_LIB_LOCATION+"/cli"

require 'command_parser'
require 'one_helper/onevm_helper'

cmd=CommandParser::CmdParser.new(ARGV) do
    usage "`onevm` <command> [<args>] [<options>]"
    version OpenNebulaHelper::ONE_VERSION

    helper = OneVMHelper.new

    before_proc do
        helper.set_client(options)
    end

    TYPE={
        :name => "type",
        :short => "-t type",
        :large => "--type type",
        :format => String,
        :description => "Type of the new Image"
    }

    TARGET={
        :name => "target",
        :short => "-t target",
        :large => "--target target",
        :format => String,
        :description => "Device where the image will be attached"
    }

    PREFIX={
        :name => "prefix",
        :large => "--prefix prefix",
        :format => String,
        :description => "Overrides the DEV_PREFIX of the image"
    }

    CACHE={
        :name => "cache",
        :large => "--cache cache_mode",
        :format => String,
        :description => "Hypervisor cache mode: default, none, writethrough,"<<
            " writeback, directsync or unsafe. (Only KVM driver)"
    }

    DISCARD={
        :name => "discard",
        :large => "--discard discard_mode",
        :format => String,
        :description => "Hypervisor discard mode: ignore or unmap."<<
            " (Only KVM driver)"
    }

    ENFORCE={
        :name  => "enforce",
        :short => "-e",
        :large => "--enforce",
        :description => "Enforce that the host capacity is not exceeded"
    }

    SUCCESS={
        :name  => "success",
        :large => "--success",
        :description => "Recover a VM by succeeding the pending action"
    }

    FAILURE={
        :name  => "failure",
        :large => "--failure",
        :description => "Recover a VM by failing the pending action"
    }

    RETRY={
        :name  => "retry",
        :large => "--retry",
        :description => "Recover a VM by retrying the last failed action"
    }

    INTERACTIVE={
        :name  => "interactive",
        :large => "--interactive",
        :description => "Enables interactive recovery. Only works alongside "<<
            " the --retry option."
    }

    SNAP={
        :name  => "snapshot",
        :short => "-s snapshot",
        :large => "--snapshot snapshot",
        :format => String,
        :description => "ID of the Snapshot to save."
    }

    PERSISTENT={
        :name  => "persistent",
        :large => "--persistent",
        :description => "Make the new images persistent"
    }

    ########################################################################
    # Global Options
    ########################################################################
    set :option, CommandParser::OPTIONS+OpenNebulaHelper::CLIENT_OPTIONS

    ########################################################################
    # Formatters for arguments
    ########################################################################
    set :format, :hostid, OpenNebulaHelper.rname_to_id_desc("HOST") do |arg|
        OpenNebulaHelper.rname_to_id(arg, "HOST")
    end

    set :format, :groupid, OpenNebulaHelper.rname_to_id_desc("GROUP") do |arg|
        OpenNebulaHelper.rname_to_id(arg, "GROUP")
    end

    set :format, :userid, OpenNebulaHelper.rname_to_id_desc("USER") do |arg|
        OpenNebulaHelper.rname_to_id(arg, "USER")
    end

    set :format, :datastoreid, OpenNebulaHelper.rname_to_id_desc("DATASTORE") do |arg|
        OpenNebulaHelper.rname_to_id(arg, "DATASTORE")
    end

    set :format, :vmid, OneVMHelper.to_id_desc do |arg|
        helper.to_id(arg)
    end

    set :format, :vmid_list, OneVMHelper.list_to_id_desc do |arg|
        helper.list_to_id(arg)
    end

    set :format, :filterflag, OneVMHelper.filterflag_to_i_desc do |arg|
        helper.filterflag_to_i(arg)
    end

    set :format, :diskid, "Integer" do |arg|
        format_int(arg)
    end

    ########################################################################
    # Commands
    ########################################################################

    create_desc = <<-EOT.unindent
        Creates a new VM from the given description instead of using a
        previously defined template (see 'onetemplate create' and
        'onetemplate instantiate').

        Examples:

          - using a template description file:

            onevm create vm_description.tmpl

          - new VM named "arch vm" with a disk and a nic

            onevm create --name "arch vm" --memory 128 --cpu 1 --disk arch \\
                         --network private_lan

          - a vm with two disks

            onevm create --name "test vm" --memory 128 --cpu 1 --disk arch,data

    EOT

    command :create, create_desc, [:file, nil], :options =>
            [OneVMHelper::MULTIPLE, OneVMHelper::HOLD]+
            OpenNebulaHelper::TEMPLATE_OPTIONS_VM do

        number    = options[:multiple] || 1
        exit_code = nil

        if args[0] && OpenNebulaHelper.create_template_options_used?(options)
            STDERR.puts "You can not use both template file and template"<<
                " creation options."
            next -1
        end

        begin
            if args[0]
                template=File.read(args[0])
            else
                res = OpenNebulaHelper.create_template(options)

                if res.first != 0
                    STDERR.puts res.last
                    next -1
                end

                template = res.last
            end

        rescue Exception => e
            STDERR.puts "Error reading template."
            next -1
        end

        if options[:dry]
            puts template
            exit 0
        end

        on_hold = options[:hold] != nil

        number.times do
            exit_code = helper.create_resource(options) do |vm|
                error = vm.allocate(template, on_hold)
            end

            break if exit_code == -1
        end

        exit_code
    end

    update_desc = <<-EOT.unindent
        Update the user template contents. If a path is not provided the
        editor will be launched to modify the current content.
    EOT

    command :update, update_desc, :vmid, [:file, nil],
    :options=>OpenNebulaHelper::APPEND do
        helper.perform_action(args[0],options,"modified") do |obj|
            if options[:append]
                str = OpenNebulaHelper.append_template(args[0], obj, args[1], 'USER_TEMPLATE')
            else
                str = OpenNebulaHelper.update_template(args[0], obj, args[1], 'USER_TEMPLATE')
            end

            helper.set_client(options)
            obj = helper.retrieve_resource(obj.id)

            obj.update(str, options[:append])
        end
    end

    delete_desc = <<-EOT.unindent
        Deletes the given VM. Using --recreate resubmits the VM.

        Resubmits the VM to PENDING state. This is intended for VMs stuck in a
        transient state. To re-deploy a fresh copy of the same VM, create a
        Template and instantiate it, see 'onetemplate instantiate'

        States: ANY
    EOT

    command :delete, delete_desc, [:range, :vmid_list],
        :options => [OneVMHelper::SCHEDULE, OneVMHelper::RECREATE] do

        command_name="delete"
        command_name<<"-recreate" if options[:recreate]

        if (!options[:schedule].nil?)
            helper.schedule_actions(args[0], options, command_name)
        else
            helper.perform_actions(args[0],options,"deleted") do |vm|
                vm.delete(options[:recreate]==true)
            end
        end
    end

    hold_desc = <<-EOT.unindent
        Sets the given VM on hold. A VM on hold is not scheduled until it is
        released. It can be, however, deployed manually; see 'onevm deploy'

        States: PENDING
    EOT

    command :hold, hold_desc, [:range,:vmid_list],
        :options => [OneVMHelper::SCHEDULE] do
        if (!options[:schedule].nil?)
            helper.schedule_actions(args[0], options, @comm_name)
        else
            helper.perform_actions(args[0],options,"put on hold") do |vm|
                vm.hold
            end
        end
    end

    release_desc = <<-EOT.unindent
        Releases a VM on hold. See 'onevm hold'

        States: HOLD
    EOT

    command :release, release_desc, [:range,:vmid_list],
        :options => [OneVMHelper::SCHEDULE] do
        if (!options[:schedule].nil?)
            helper.schedule_actions(args[0], options, @comm_name)
        else
            helper.perform_actions(args[0],options,"released") do |vm|
                vm.release
            end
        end
    end

    disk_saveas_desc = <<-EOT.unindent
        Saves the specified VM disk as a new Image. The Image is
        created immediately, and the contents of the VM disk will be saved to
        it.

        States: ANY
    EOT

    command :"disk-saveas", disk_saveas_desc, :vmid, :diskid, :img_name,
            :options=>[TYPE, SNAP] do

        disk_id     = args[1].to_i
        image_name  = args[2]
        image_type  = options[:type] || ""
        snapshot_id = options[:snapshot]

        if snapshot_id.nil? || snapshot_id.empty?
            snapshot_id = -1

            verbose = "disk #{disk_id} prepared to be saved in " <<
                      "the image #{image_name}"
        else
            snapshot_id = snapshot_id.to_i

            verbose = "disk #{disk_id} snapshot #{snapshot_id} prepared to " <<
                      "be saved in the image #{image_name}"
        end

        helper.perform_action(args[0],options,verbose) do |vm|
            res = vm.disk_saveas(disk_id, image_name, image_type, snapshot_id)

            if !OpenNebula.is_error?(res)
                puts "Image ID: #{res}"
            end

            res
        end
    end

    shutdown_desc = <<-EOT.unindent
        Shuts down the given VM. The VM life cycle will end.

        With --hard it unplugs the VM.

        States: RUNNING, UNKNOWN (with --hard)
    EOT

    command :shutdown, shutdown_desc, [:range,:vmid_list],
        :options => [OneVMHelper::SCHEDULE, OneVMHelper::HARD] do

        command_name='shutdown'
        command_name<<'-hard' if options[:hard]

        if (!options[:schedule].nil?)
            helper.schedule_actions(args[0], options, command_name)
        else
            helper.perform_actions(args[0],options,"shutting down") do |vm|
                vm.shutdown(options[:hard]==true)
            end
        end
    end

    undeploy_desc = <<-EOT.unindent
        Shuts down the given VM. The VM is saved in the system Datastore.

        With --hard it unplugs the VM.

        States: RUNNING
    EOT

    command :undeploy, undeploy_desc, [:range,:vmid_list],
        :options => [OneVMHelper::SCHEDULE, OneVMHelper::HARD] do

        command_name='undeploy'
        command_name<<'-hard' if options[:hard]

        if (!options[:schedule].nil?)
            helper.schedule_actions(args[0], options, command_name)
        else
            helper.perform_actions(args[0],options,"shutting down") do |vm|
                vm.undeploy(options[:hard]==true)
            end
        end
    end

    poweroff_desc = <<-EOT.unindent
        Powers off the given VM. The VM will remain in the poweroff state, and
        can be powered on with the 'onevm resume' command.

        States: RUNNING
    EOT

    command :poweroff, poweroff_desc, [:range,:vmid_list],
        :options => [OneVMHelper::SCHEDULE, OneVMHelper::HARD] do

        command_name='poweroff'
        command_name<<'-hard' if options[:hard]

        if (!options[:schedule].nil?)
            helper.schedule_actions(args[0], options, @comm_name)
        else
            helper.perform_actions(args[0],options,"shutting down") do |vm|
                vm.poweroff(options[:hard]==true)
            end
        end
    end

    reboot_desc = <<-EOT.unindent
        Reboots the given VM, this is equivalent to execute the reboot command
        from the VM console.

        The VM will be ungracefully rebooted if --hard is used.

        States: RUNNING
    EOT

    command :reboot, reboot_desc, [:range,:vmid_list],
        :options => [OneVMHelper::SCHEDULE, OneVMHelper::HARD] do

        command_name='reboot'
        command_name<<'-hard' if options[:hard]

        if (!options[:schedule].nil?)
            helper.schedule_actions(args[0], options, command_name)
        else
            helper.perform_actions(args[0],options,"rebooting") do |vm|
                vm.reboot(options[:hard])
            end
        end
    end

    deploy_desc = <<-EOT.unindent
        Deploys the given VM in the specified Host. This command forces the
        deployment, in a standard installation the Scheduler is in charge
        of this decision

        States: PENDING, HOLD, STOPPED, UNDEPLOYED
    EOT

    command :deploy, deploy_desc, [:range,:vmid_list], :hostid, [:datastoreid,nil],
            :options=>[ENFORCE] do
        host_id = args[1]
        verbose = "deploying in host #{host_id}"

        enforce = options[:enforce].nil? ? false : options[:enforce]
        ds_id = args[2].nil? ? -1 : args[2]

        helper.perform_actions(args[0],options,verbose) do |vm|
            vm.deploy(host_id, enforce, ds_id)
        end
    end

    migrate_desc = <<-EOT.unindent
        Migrates the given running VM to another Host. If used with --live
        parameter the miration is done without downtime.

        States: RUNNING
    EOT

    command :migrate, migrate_desc, [:range,:vmid_list], :hostid, [:datastoreid,nil],
            :options=>[ENFORCE, OneVMHelper::LIVE] do
        host_id = args[1]
        verbose = "migrating to #{host_id}"

        ds_id = args[2].nil? ? -1 : args[2]

        helper.perform_actions(args[0],options,verbose) do |vm|
            vm.migrate( host_id,
                        options[:live]==true,
                        options[:enforce]==true,
                        ds_id)
        end
    end

    stop_desc = <<-EOT.unindent
        Stops a running VM. The VM state is saved and transferred back to the
        front-end along with the disk files

        States: RUNNING
    EOT

    command :stop, stop_desc, [:range,:vmid_list],
        :options => [OneVMHelper::SCHEDULE] do
        if (!options[:schedule].nil?)
            helper.schedule_actions(args[0], options, @comm_name)
        else
            helper.perform_actions(args[0],options,"stopping") do |vm|
                vm.stop
            end
        end
    end

    suspend_desc = <<-EOT.unindent
        Saves a running VM. It is the same as 'onevm stop', but the files
        are left in the remote machine to later restart the VM there
        (i.e. the resources are not freed and there is no need to
        re-schedule the VM).

        States: RUNNING
    EOT

    command :suspend, suspend_desc, [:range,:vmid_list],
        :options => [OneVMHelper::SCHEDULE] do
        if (!options[:schedule].nil?)
            helper.schedule_actions(args[0], options, @comm_name)
        else
            helper.perform_actions(args[0],options,"suspending") do |vm|
                vm.suspend
            end
        end
    end

    resume_desc = <<-EOT.unindent
        Resumes the execution of the a saved VM

        States: STOPPED, SUSPENDED, UNDEPLOYED, POWEROFF, UNKNOWN
    EOT

    command :resume, resume_desc, [:range,:vmid_list],
        :options => [OneVMHelper::SCHEDULE] do
        if (!options[:schedule].nil?)
            helper.schedule_actions(args[0], options, @comm_name)
        else
            helper.perform_actions(args[0],options,"resuming") do |vm|
                vm.resume
            end
        end
    end

    recover_desc = <<-EOT.unindent
        Recovers a stuck VM that is waiting for a driver operation. The recovery
        may be done by failing, succeeding or retrying the current operation. YOU NEED
        TO MANUALLY CHECK THE VM STATUS ON THE HOST, to decide if the operation
        was successful or not, or if it can be retried.

        Example: A VM is stuck in "migrate" because of a hardware failure. You
        need to check if the VM is running in the new host or not to recover
        the vm with --success or --failure, respectively.

        States for success/failure recovers: Any ACTIVE state.
        States for a retry recover: Any *FAILURE state
    EOT

    command :recover, recover_desc, [:range,:vmid_list],
        :options => [SUCCESS, FAILURE, RETRY, INTERACTIVE] do
        if !options[:success].nil?
            result = 1
        elsif !options[:failure].nil?
            result = 0
        elsif !options[:retry].nil?
            result = 2
        else
            STDERR.puts "Need to specify the result of the pending action."
            STDERR.puts "\t--success recover the VM by succeeding the missing action."
            STDERR.puts "\t--failure recover the VM by failing the missing action."
            STDERR.puts "\t--retry recover the VM by retrying the last failed action."
            exit -1
        end

        helper.perform_actions(args[0], options, "recovering") do |vm|
            if options[:retry] && options[:interactive]
                helper.recover_retry_interactive(vm)
            else
                vm.recover(result)
            end
        end
    end

    disk_attach_desc = <<-EOT.unindent
        Attaches a disk to a running VM. When using --file add only one
        DISK instance.

        States: RUNNING, POWEROFF
    EOT

    command :"disk-attach", disk_attach_desc, :vmid,
            :options => [OneVMHelper::FILE, OneVMHelper::IMAGE,
                         TARGET, CACHE, DISCARD, PREFIX] do

        if options[:file].nil? and options[:image].nil?
            STDERR.puts "Provide a template file or an image:"
            STDERR.puts "\t--file  <file>"
            STDERR.puts "\t--image <image>"
            exit -1
        end

        if options[:file]
            template = File.read(options[:file])
        else
            image_id = options[:image]
            target   = options[:target]
            prefix   = options[:prefix]

            if target
                template =
                    "DISK = [ IMAGE_ID = #{image_id}, TARGET = #{target}"
            else
                template = "DISK = [ IMAGE_ID = #{image_id}"
                template << ", DEV_PREFIX = #{prefix}" if prefix
            end

            if options[:cache]
                template<<", CACHE = \"#{options[:cache]}\""
            end

            if options[:discard]
                template<<", DISCARD = \"#{options[:discard]}\""
            end

            template << " ]"
        end

        helper.perform_action(args[0],options,"Attach disk") do |vm|
            vm.disk_attach(template)
        end
    end

    disk_detach_desc = <<-EOT.unindent
        Detaches a disk from a running VM

        States: RUNNING, POWEROFF
    EOT

    command :"disk-detach", disk_detach_desc, :vmid, :diskid do
        diskid = args[1].to_i

        helper.perform_action(args[0],options,"Detach disk") do |vm|
            vm.disk_detach(diskid)
        end
    end

    nic_attach_desc = <<-EOT.unindent
        Attaches a NIC to a running VM. When using --file add only one
        NIC instance.

        States: RUNNING, POWEROFF
    EOT

    command :"nic-attach", nic_attach_desc, :vmid,
            :options => [OneVMHelper::FILE, OneVMHelper::NETWORK, OneVMHelper::IP] do

        if options[:file].nil? and options[:network].nil?
            STDERR.puts "Provide a template file or a network:"
            STDERR.puts "\t--file    <file>"
            STDERR.puts "\t--network <network>"
            exit -1
        end

        if options[:file]
            template = File.read(options[:file])
        else
            network_id = options[:network]
            ip = options[:ip]
            if ip
                template = "NIC = [ NETWORK_ID = #{network_id}, IP = #{ip} ]"
            else
                template = "NIC = [ NETWORK_ID = #{network_id} ]"
            end
        end

        helper.perform_action(args[0],options,"Attach NIC") do |vm|
            vm.nic_attach(template)
        end
    end

    nic_detach_desc = <<-EOT.unindent
        Detaches a NIC from a running VM

        States: RUNNING, POWEROFF
    EOT

    command :"nic-detach", nic_detach_desc, :vmid, :nicid do
        nicid = args[1].to_i

        helper.perform_action(args[0],options,"Detach NIC") do |vm|
            vm.nic_detach(nicid)
        end
    end

    chgrp_desc = <<-EOT.unindent
        Changes the VM group
    EOT

    command :chgrp, chgrp_desc,[:range, :vmid_list], :groupid do
        helper.perform_actions(args[0],options,"Group changed") do |vm|
            vm.chown(-1, args[1].to_i)
        end
    end

    chown_desc = <<-EOT.unindent
        Changes the VM owner and group
    EOT

    command :chown, chown_desc, [:range, :vmid_list], :userid,
            [:groupid,nil] do
        gid = args[2].nil? ? -1 : args[2].to_i
        helper.perform_actions(args[0],options,"Owner/Group changed") do |vm|
            vm.chown(args[1].to_i, gid)
        end
    end

    chmod_desc = <<-EOT.unindent
        Changes the VM permissions
    EOT

    command :chmod, chmod_desc, [:range, :vmid_list], :octet do
        helper.perform_actions(args[0],options, "Permissions changed") do |vm|
            vm.chmod_octet(args[1])
        end
    end

    resched_desc = <<-EOT.unindent
        Sets the rescheduling flag for the VM.

        States: RUNNING
    EOT

    command :resched, resched_desc, [:range,:vmid_list] do
        helper.perform_actions(args[0],options,"Setting resched flag") do |vm|
            vm.resched
        end
    end

    unresched_desc = <<-EOT.unindent
        Clears the rescheduling flag for the VM.

        States: RUNNING
    EOT

    command :unresched, unresched_desc, [:range,:vmid_list] do
        helper.perform_actions(args[0],options,"Clearing resched flag") do |vm|
            vm.unresched
        end
    end

    rename_desc = <<-EOT.unindent
        Renames the VM
    EOT

    command :rename, rename_desc, :vmid, :name do
        helper.perform_action(args[0],options,"renamed") do |o|
            o.rename(args[1])
        end
    end

    # TODO: Write a more complete description:
    # what is a snapshot (system snapshot)
    # how to revert to a snapshot
    snapshot_create_desc = <<-EOT.unindent
        Creates a new VM snapshot
    EOT

    command :"snapshot-create", snapshot_create_desc, [:range,:vmid_list],
        [:name, nil], :options => [OneVMHelper::SCHEDULE] do

        if (!options[:schedule].nil?)
            helper.schedule_actions(args[0], options, @comm_name)
        else
            helper.perform_actions(args[0],options,"snapshot created") do |o|
                o.snapshot_create(args[1])
            end
        end
    end

    # TODO: Write a more complete description:
    snapshot_revert_desc = <<-EOT.unindent
        Reverts a VM to a saved snapshot
    EOT

    command :"snapshot-revert", snapshot_revert_desc, :vmid, :snapshot_id do

        helper.perform_action(args[0],options,"snapshot reverted") do |o|
            o.snapshot_revert(args[1].to_i)
        end
    end

    # TODO: Write a more complete description:
    snapshot_delete_desc = <<-EOT.unindent
        Delets a snapshot of a VM
    EOT

    command :"snapshot-delete", snapshot_delete_desc, :vmid, :snapshot_id do
        helper.perform_action(args[0],options,"snapshot deleted") do |o|
            o.snapshot_delete(args[1].to_i)
        end
    end

    disk_snapshot_create_desc = <<-EOT.unindent
        Takes a new snapshot of the given disk. This operation needs support
        from the Datastore drivers: QCOW2 or Ceph.

        States: RUNNING, POWEROFF, SUSPENDED
    EOT

    command :"disk-snapshot-create", disk_snapshot_create_desc,
      :vmid, :diskid, :name do
        helper.perform_action(args[0],options,"disk snapshot created") do |o|
          o.disk_snapshot_create(args[1].to_i, args[2])
        end
    end

    disk_snapshot_revert_desc = <<-EOT.unindent
        Reverts disk state to a previously taken snapshot.

        States: RUNNING, POWEROFF, SUSPENDED
    EOT

    command :"disk-snapshot-revert", disk_snapshot_revert_desc,
      :vmid, :diskid, :snapshot_id do
        helper.perform_action(args[0],options,"disk snapshot reverted") do |o|
          o.disk_snapshot_revert(args[1].to_i, args[2].to_i)
        end
    end

    disk_snapshot_delete_desc = <<-EOT.unindent
        Deletes a disk snapshot.

        States: RUNNING, POWEROFF, SUSPENDED
    EOT
    command :"disk-snapshot-delete", disk_snapshot_delete_desc,
      :vmid, :diskid, :snapshot_id do
        helper.perform_action(args[0],options,"disk snapshot deleted") do |o|
          o.disk_snapshot_delete(args[1].to_i, args[2].to_i)
        end
    end

    list_desc = <<-EOT.unindent
        Lists VMs in the pool
    EOT

    command :list, list_desc, [:filterflag, nil],
            :options=>CLIHelper::OPTIONS+OpenNebulaHelper::OPTIONS+
            [OpenNebulaHelper::DESCRIBE] do
        helper.list_pool(options, false, args[0])
    end

    show_desc = <<-EOT.unindent
        Shows information for the given VM
    EOT

    command :show, show_desc, :vmid,
            :options=>[OpenNebulaHelper::XML, OneVMHelper::ALL_TEMPLATE] do
        helper.show_resource(args[0],options)
    end

    top_desc = <<-EOT.unindent
        Lists Images continuously
    EOT

    command :top, top_desc, [:filterflag, nil],
            :options=>CLIHelper::OPTIONS+OpenNebulaHelper::OPTIONS do
        helper.list_pool(options, true, args[0])
    end

    resize_desc = <<-EOT.unindent
        Resizes the capacity of a Virtual Machine (offline, the VM cannot be
        RUNNING)

    EOT

    command :resize, resize_desc, :vmid, :options =>
            OpenNebulaHelper::CAPACITY_OPTIONS_VM + [ENFORCE, OneVMHelper::FILE] do

        if options[:file]
            template = File.read(options[:file])
        else
            template = ""

            if !options[:cpu].nil?
                template << "CPU = #{options[:cpu]}\n"
            end

            if !options[:vcpu].nil?
                template << "VCPU = #{options[:vcpu]}\n"
            end

            if !options[:memory].nil?
                template << "MEMORY = #{options[:memory]}\n"
            end
        end

        enforce = options[:enforce] || false

        helper.perform_action(args[0], options, "Resizing VM") do |vm|
            vm.resize(template, enforce)
        end
    end

    save_desc = <<-EOT.unindent
        Clones the VM's source Template, replacing the disks with live snapshots
        of the current disks. The VM capacity and NICs are also preserved

        States: POWEROFF
    EOT

    command :save, save_desc, :vmid, :name, :options=>[PERSISTENT] do
        helper.perform_action(args[0],options,"Saving VM") do |vm|
            res = vm.save_as_template(args[1], options[:persistent] )

            if !OpenNebula.is_error?(res)
                puts "Template ID: #{res}"
            end

            res
        end
    end

    # Deprecated commands

    deprecated_command(:attachdisk, 'disk-attach')
    deprecated_command(:detachdisk, 'disk-detach')
    deprecated_command(:'disk-snapshot', 'disk-saveas')
    deprecated_command(:livemigrate, 'migrate --live')
    deprecated_command(:cancel, 'shutdown --hard')
    deprecated_command(:reset, 'reboot --hard')
    deprecated_command(:restart, 'recover --retry')
    deprecated_command(:boot, 'recover --retry')
    deprecated_command(:resubmit, 'delete --recreate')
end