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vm.rb
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vm.rb
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require 'fission/leasesfile'
require 'shellwords'
require 'fission/error'
module Fission
class VM
attr_reader :name
def initialize(name)
@name = name
end
#####################################################
# Path Helpers
#####################################################
# Returns the topdir of the vm
def path
File.join Fission.config.attributes['vm_dir'], "#{@name}.vmwarevm"
end
# Returns a string to the path of the config file
# There is no guarantee it exists
def vmx_path
return File.join(path, "#{@name}.vmx")
end
####################################################################
# State information
####################################################################
def running?
raise Fission::Error,"VM #{@name} does not exist" unless self.exists?
command = "#{vmrun_cmd} list"
output = `#{command}`
response = Fission::Response.new :code => $?.exitstatus
if response.successful?
vms = output.split("\n").select do |vm|
vm.include?('.vmx') && File.exists?(vm) && File.extname(vm) == '.vmx'
end
return vms.include?(self.vmx_path)
else
raise Fission::Error,"Error listing the state of vm #{@name}:\n#{output}"
end
end
def suspended?
raise Fission::Error,"VM #{@name} does not exist" unless self.exists?
suspend_filename=File.join(File.dirname(vmx_path), File.basename(vmx_path,".vmx")+".vmem")
return File.exists?(suspend_filename)
end
# Checks to see if a vm exists
def exists?
File.exists? vmx_path
end
# Returns the state of a vm
def state
return "not created" unless self.exists?
return "suspend" if self.suspended?
return "running" if self.running?
return "not running"
end
####################################################################
# VM information
####################################################################
# Returns an Array of snapshot names
def snapshots
raise Fission::Error,"VM #{@name} does not exist" unless self.exists?
command = "#{vmrun_cmd} listSnapshots #{vmx_path.shellescape} 2>&1"
output = `#{command}`
raise "There was an error listing the snapshots of #{@name} :\n #{output}" unless $?.exitstatus==0
snaps_unfiltered = output.split("\n").select { |s| !s.include? 'Total snapshots:' }
snaps=snaps_unfiltered.map { |s| s.strip }
return snaps
end
# Retrieve the first mac address for a vm
# This will only retrieve the first auto generate mac address
def mac_address
raise ::Fission::Error,"VM #{@name} does not exist" unless self.exists?
line=File.new(vmx_path).grep(/^ethernet0.generatedAddress =/)
if line.nil?
#Fission.ui.output "Hmm, the vmx file #{vmx_path} does not contain a generated mac address "
return nil
end
address=line.first.split("=")[1].strip.split(/\"/)[1]
return address
end
# Retrieve the ip address for a vm.
# This will only look for dynamically assigned ip address via vmware dhcp
def ip_address
raise ::Fission::Error,"VM #{@name} does not exist" unless self.exists?
unless mac_address.nil?
lease=LeasesFile.new("/var/db/vmware/vmnet-dhcpd-vmnet8.leases").find_lease_by_mac(mac_address)
if lease.nil?
return nil
else
return lease.ip
end
else
# No mac address was found for this machine so we can't calculate the ip-address
return nil
end
end
####################################################################
# VMS information
####################################################################
# Returns an array of vm objects
def self.all
vm_dirs = Dir[File.join Fission.config.attributes['vm_dir'], '*.vmwarevm'].select do |d|
File.directory? d
end
vm_names=vm_dirs.map { |d| File.basename d, '.vmwarevm' }
vms=[]
vm_names.each do |vmname|
vm=Fission::VM.new vmname
vms << vm
end
return vms
end
# Returns an array of vms that are running
def self.all_running
running_vms=self.all.select do |vm|
vm.state=="running"
end
return running_vms
end
# Returns an existing vm
def self.get(name)
return Fission::VM.new(name)
end
#####################################################
# VM Class Actions
#####################################################
def self.clone(source_vm, target_vm)
raise Fission::Error,"VM #{source_vm} does not exist" unless Fission::VM.new(source_vm).exists?
raise Fission::Error,"VM #{target_vm} already exists" if Fission::VM.new(target_vm).exists?
FileUtils.cp_r Fission::VM.new(source_vm).path, Fission::VM.new(target_vm).path
rename_vm_files source_vm, target_vm
update_config source_vm, target_vm
response = Response.new :code => 0
end
def self.delete(vm_name)
raise Fission::Error,"VM #{vm_name} does not exist" unless Fission::VM.new(vm_name).exists?
vm=Fission::VM.new(vm_name)
FileUtils.rm_rf vm.path
Fission::Metadata.delete_vm_info(vm.path)
Response.new :code => 0
end
#####################################################
# VM Instance Actions
#####################################################
def create_snapshot(name)
raise Fission::Error,"VM #{@name} does not exist" unless self.exists?
command = "#{vmrun_cmd} snapshot #{vmx_path.shellescape} \"#{name}\" 2>&1"
output = `#{command}`
response = Fission::Response.new :code => $?.exitstatus
response.output = output unless response.successful?
response
end
def start(args={})
raise Fission::Error,"VM #{@name} does not exist" unless self.exists?
raise Fission::Error,"VM #{@name} is already started" if self.running?
command = "#{vmrun_cmd} start #{vmx_path.shellescape}"
if !args[:headless].blank? && args[:headless]
command << " nogui 2>&1"
else
command << " gui 2>&1"
end
output = `#{command}`
response = Fission::Response.new :code => $?.exitstatus
response.output = output unless response.successful?
response
end
def stop
raise Fission::Error,"VM #{@name} does not exist" unless self.exists?
raise Fission::Error,"VM #{@name} is not running" unless self.running?
command = "#{vmrun_cmd} stop #{vmx_path.shellescape} 2>&1"
output = `#{command}`
response = Fission::Response.new :code => $?.exitstatus
response.output = output unless response.successful?
response
end
def halt
raise Fission::Error,"VM #{@name} does not exist" unless self.exists?
raise Fission::Error,"VM #{@name} is not running" unless self.running?
command = "#{vmrun_cmd} stop #{vmx_path.shellescape} hard 2>&1"
output = `#{command}`
response = Fission::Response.new :code => $?.exitstatus
response.output = output unless response.successful?
response
end
def resume
raise Fission::Error,"VM #{@name} does not exist" unless self.exists?
raise Fission::Error,"VM #{@name} is already running" if self.running?
if self.suspended?
self.start
end
end
def suspend
raise Fission::Error,"VM #{@name} does not exist" unless self.exists?
raise Fission::Error,"VM #{@name} is not running" unless self.running?
command = "#{vmrun_cmd} suspend #{vmx_path.shellescape} hard 2>&1"
output = `#{command}`
response = Fission::Response.new :code => $?.exitstatus
response.output = output unless response.successful?
response
end
# Action to revert to a snapshot
# Returns a response object
def revert_to_snapshot(name)
raise Fission::Error,"VM #{@name} does not exist" unless self.exists?
command = "#{vmrun_cmd} revertToSnapshot #{vmx_path.shellescape} \"#{name}\" 2>&1"
output = `#{command}`
response = Fission::Response.new :code => $?.exitstatus
response.output = output unless response.successful?
response
end
#####################################################
# Helpers
#####################################################
private
def self.rename_vm_files(from, to)
to_vm=Fission::VM.new(to)
files_to_rename(from, to).each do |filename|
text_to_replace = File.basename(filename, File.extname(filename))
if File.extname(filename) == '.vmdk'
if filename.match /\-s\d+\.vmdk/
text_to_replace = filename.partition(/\-s\d+.vmdk/).first
end
end
unless File.exists?(File.join(to_vm.path, filename.gsub(text_to_replace, to)))
FileUtils.mv File.join(to_vm.path, filename),
File.join(to_vm.path, filename.gsub(text_to_replace, to))
end
end
end
def self.files_to_rename(from, to)
files_which_match_source_vm = []
other_files = []
from_vm=Fission::VM.new(from)
Dir.entries(from_vm.path).each do |f|
unless f == '.' || f == '..'
f.include?(from) ? files_which_match_source_vm << f : other_files << f
end
end
files_which_match_source_vm + other_files
end
def self.vm_file_extensions
['.nvram', '.vmdk', '.vmem', '.vmsd', '.vmss', '.vmx', '.vmxf']
end
# This is done after a clone has been done
# All files are already at the to location
# The content of the text files will be substituted with strings from => to
def self.update_config(from, to)
to_vm=Fission::VM.new(to)
['.vmx', '.vmxf', '.vmdk'].each do |ext|
file = File.join to_vm.path, "#{to}#{ext}"
unless File.binary?(file)
text = (File.read file).gsub from, to
# Force binary mode to prevent windows from putting CR-LF end line style
# http://www.ruby-forum.com/topic/60697#58748
File.open(file, 'wb'){ |f| f.print text }
end
end
# Rewrite vmx file to avoid messages
new_vmx_file=File.open(File.join(to_vm.vmx_path),'r')
content=new_vmx_file.read
# Filter out other values
content=content.gsub(/^tools.remindInstall.*\n/, "")
content=content.gsub(/^uuid.action.*\n/,"").strip
# Remove generate mac addresses
content=content.gsub(/^ethernet.+generatedAddress.*\n/,"").strip
# Add the correct values
content=content+"\ntools.remindInstall = \"FALSE\"\n"
content=content+"uuid.action = \"create\"\n"
# Now rewrite the vmx file
# Force binary mode to prevent windows from putting CR-LF end line style
# http://www.ruby-forum.com/topic/60697#58748
File.open(new_vmx_file,'wb'){ |f| f.print content}
end
def vmrun_cmd
return Fission.config.attributes['vmrun_cmd']
end
end
end