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Vm.py
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Vm.py
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#!/usr/bin/env python2
# -*- coding: utf-8 -*-
__author__ = 'Andreas Bader'
__version__ = "0.01"
import threading
import time
import vagrant
import os
import Util
import re
from fabric.api import *
class Vm():
vagrantFolders=None
pathVagrantfile=None
credFiles=None
basicFilesFolder=None
pathFolder=None
tmpFolder=None
name=None
logging=False
logger=None
created=False
vm=None
thread=None
provider=None
ip=None
# vagrantFolders: Folders inside which vagrantfiles+folders are
# tmpFolder: Path to tempfolder
# name: name of the VM
# logger: Logger instance
# logging: if true, vagrant debug logging will be done
def __init__(self, vagrantFolders, credFiles, basicFilesFolder, tmpFolder, name, logger, provider, logging):
self.vagrantFolders = vagrantFolders
self.credFiles=credFiles
self.basicFilesFolder=basicFilesFolder
self.tmpFolder = tmpFolder
self.name = name
self.logger = logger
self.logging = logging
self.provider = provider
def start(self):
self.thread = threading.Thread(target=self.run)
self.thread.start()
def join(self):
self.thread.join()
def run(self):
if not self.created:
self.create_vm()
else:
self.destroy()
def destroy(self):
if self.vm != None:
return self.vm.destroy()
return True
def create_vm(self):
# Check if you want to log
log_cm=None
self.logger.info("BEGIN Creating %s." %(self.name))
if self.logging:
try:
filename="%s_%s.log" %(self.name,time.strftime("%Y%m%d%H%M%S", time.localtime()))
log_cm = vagrant.make_file_cm(filename)
self.logger.info("Logging creation of %s to %s." % (self.name,filename))
except Exception, e:
self.logger.error('Failed to open file', exc_info=True)
return False
pathName=self.name.rsplit("_",1)[0] # Name is something like VMNAME_1, split _1 away!
# copy to tmpfolder (already checked that it exist, need to check if vm folder exists)
paths=Util.create_folder_path_list(self.vagrantFolders, [pathName])
pathTmp=os.path.join(self.tmpFolder,self.name)
if not Util.check_folders(paths, self.logger, False, True, True):
return False
if not Util.check_folder(pathTmp, self.logger, True):
return False
# Copy Vagrantfile in place
pathVagrantFileOld=os.path.join(pathTmp,"%s.vagrant"%(self.name))
pathVagrantFileNew=os.path.join(pathTmp,"Vagrantfile")
if not Util.copy_folders(paths,pathTmp,self.logger, True):
return False
self.pathFolder=pathTmp
for credFile in self.credFiles:
credFilesOld = Util.create_folder_path_list(self.vagrantFolders, [credFile])
pathCredFileNew = os.path.join(pathTmp,credFile)
for credFileOld in credFilesOld:
if Util.check_file_exists(credFileOld):
if not Util.copy_file(credFileOld,pathCredFileNew,self.logger):
return False
basicFileFoldersOld=Util.create_folder_path_list(self.vagrantFolders, [self.basicFilesFolder])
pathBasicFileFolderNew=os.path.join(pathTmp,self.basicFilesFolder)
if not Util.copy_folders(basicFileFoldersOld,pathBasicFileFolderNew,self.logger, True):
return False
# digital ocean needs a random name, otherwise we always get problems with multiple measurements
if Util.check_file_exists(pathVagrantFileNew):
self.logger.error("'%s' does already exist." %(pathVagrantFileNew))
return False
try:
file_old = open(pathVagrantFileOld, "r")
file_new = open(pathVagrantFileNew, "w")
for line in file_old:
if re.match(r'^\s*HOSTNAME\s+=\s+("[^"]+"|\'[^\']+\')\s*$',line) != None:
split_res = re.search(r'("[^"]+"|\'[^\']+\')',line)
if split_res != None:
if self.provider == "digital_ocean":
# allowed are numbers, letters, hyphens and dots
random_string = Util.get_random_string(10)
file_new.write("HOSTNAME = \"%s-%s\"\n" %(split_res.group()[1:-1],
random_string))
self.name = "%s-%s" % (split_res.group()[1:-1], random_string)
else:
self.name = "%s" % (split_res.group()[1:-1])
file_new.write(line)
else:
self.logger.warning("Could not parse hostname out of '%s'. "
"Using the default. Errors can occur." % (line))
file_new.write(line)
else:
file_new.write(line)
file_new.flush()
file_new.close()
file_old.close()
except Exception,e:
self.logger.error("An error occured while copying '%s' to '%s'." % (pathVagrantFileOld,
pathVagrantFileNew), exc_info=True)
# else:
# if not Util.copy_file(pathVagrantFileOld,pathVagrantFileNew,self.logger):
# return False
self.pathVagrantfile=pathVagrantFileNew
Util.clear_vagrant_files(pathTmp,self.logger)
# Create VM
try:
vm = vagrant.Vagrant(root=pathTmp, out_cm=log_cm, err_cm=log_cm)
self.vm=vm
vm.up(provider=self.provider)
# with settings(host_string= vm.user_hostname_port(),
# key_filename = vm.keyfile(),
# disable_known_hosts = True):
# run("uname -a")
except Exception, e:
self.logger.error('Failed while creating vm %s.' %(self.name), exc_info=True)
self.logger.info('Since creation failed, trying to destroy vm %s.' %(self.name), exc_info=True)
#if not self.vm.destroy():
# self.logger.error('Can not destroy %s.' %(self.name), exc_info=True)
## vm.destroy() seems to be always returning false at this stage (opentsack), but destroying works fine -> Ignore it.
self.vm.destroy()
return False
self.logger.info("END Creating %s." %(self.name))
self.logger.info("GET IP of %s." %(self.name))
self.ip = self.get_ip()
# the IP Part is needed, because on OpenStack the 'internal' IP differs from the 'external' (SSH) IP
if self.ip == None:
self.logger.error('Failed getting IP while creating vm %s.' %(self.name), exc_info=True)
self.logger.info('Since creation failed, trying to destroy vm %s.' %(self.name), exc_info=True)
self.vm.destroy()
return False
self.created=True
return True
# Return the output
def run_with_output (self,disableKnownHosts,command,warn_only=False,quiet=False):
with settings(host_string = self.vm.user_hostname_port(),
key_filename = self.vm.keyfile(),
disable_known_hosts = disableKnownHosts):
result = run(command,warn_only=warn_only, quiet=quiet)
return result
# Only return true/false
def run_without_output (self,disableKnownHosts,command,warn_only=False,quiet=False,test=False):
result = self.run_with_output (disableKnownHosts,command,warn_only,quiet)
if result.return_code == 0 or (warn_only and result.return_code == 255) or (test and result.return_code == -1):
return True
else:
self.logger.error("Command '%s' on %s returned %s." %(command, self.vm.user_hostname_port(), result.return_code))
return False
def get_ip(self):
head_str = " | head -n1"
if self.provider in ["virtualbox", "digital_ocean"]:
# virtualbox uses second network interface for vm-interconnections
head_str = " | head -n4 | tail -n1"
result = self.run_with_output (True,'sudo ifconfig | grep -E -o "(25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\.(25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\.(25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\.(25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)"%s' % (head_str),True, True)
if result.return_code == 0:
return result.stdout
else:
self.logger.error("Can't get IP on %s, command returned %s." %(self.vm.user_hostname_port(), result.return_code))
return None
def get_hostname(self):
result = self.run_with_output (True,'hostname',True, True)
if result.return_code == 0:
return result.stdout
else:
self.logger.error("Can't get hostname on %s, command returned %s." %(self.vm.user_hostname_port(), result.return_code))
return None