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#!/usr/bin/python

##
## Copyright (c) 2010-2017 Intel Corporation
##
## 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.
##

from __future__ import print_function

import os
import stat
import sys
import time
import subprocess
import getopt
import re
import logging
from logging.handlers import RotatingFileHandler
from logging import handlers
from prox_ctrl import prox_ctrl
import ConfigParser

version="19.6.30"
stack = "rapid" #Default string for stack. This is not an OpenStack Heat stack, just a group of VMs
vms = "rapidVMs.vms" #Default string for vms file
key = "prox" # default name for key
image = "rapidVM" # default name for the image
image_file = "rapidVM.qcow2"
dataplane_network = "dataplane-network" # default name for the dataplane network
subnet = "dpdk-subnet" #subnet for dataplane
subnet_cidr="10.10.10.0/24" # cidr for dataplane
internal_network="admin_internal_net"
floating_network="admin_floating_net"
loglevel="DEBUG" # sets log level for writing to file

def usage():
	print("usage: createrapid [--version] [-v]")
	print("                   [--stack STACK_NAME]")
	print("                   [--vms VMS_FILE]")
	print("                   [--key KEY_NAME]")
	print("                   [--image IMAGE_NAME]")
	print("                   [--image_file IMAGE_FILE]")
	print("                   [--dataplane_network DP_NETWORK]")
	print("                   [--subnet DP_SUBNET]")
	print("                   [--subnet_cidr SUBNET_CIDR]")
	print("                   [--internal_network ADMIN_NETWORK]")
	print("                   [--floating_network FLOATING_NETWORK]")
	print("                   [--log DEBUG|INFO|WARNING|ERROR|CRITICAL]")
	print("                   [-h] [--help]")
	print("")
	print("Command-line interface to createrapid")
	print("")
	print("optional arguments:")
	print("  -v,  --version           	Show program's version number and exit")
	print("  --stack STACK_NAME       	Specify a name for the stack. Default is %s."%stack)
	print("  --vms VMS_FILE         	Specify the vms file to be used. Default is %s."%vms)
	print("  --key KEY_NAME           	Specify the key to be used. Default is %s."%key)
	print("  --image IMAGE_NAME       	Specify the image to be used. Default is %s."%image)
	print("  --image_file IMAGE_FILE  	Specify the image qcow2 file to be used. Default is %s."%image_file)
	print("  --dataplane_network NETWORK 	Specify the network name to be used for the dataplane. Default is %s."%dataplane_network)
	print("  --subnet DP_SUBNET	 	Specify the subnet name to be used for the dataplane. Default is %s."%subnet)
	print("  --subnet_cidr SUBNET_CIDR  	Specify the subnet CIDR to be used for the dataplane. Default is %s."%subnet_cidr)
	print("  --internal_network NETWORK 	Specify the network name to be used for the control plane. Default is %s."%internal_network)
	print("  --floating_network NETWORK 	Specify the external floating ip network name. Default is %s. NO if no floating ip used."%floating_network)
	print("  --log				Specify logging level for log file output, screen output level is hard coded")
	print("  -h, --help               	Show help message and exit.")
	print("")

try:
	opts, args = getopt.getopt(sys.argv[1:], "vh", ["version","help", "vms=","stack=","key=","image=","image_file=","dataplane_network=","subnet=","subnet_cidr=","internal_network=","floating_network=","log="])
except getopt.GetoptError as err:
	print("===========================================")
	print(str(err))
	print("===========================================")
	usage()
	sys.exit(2)
if args:
	usage()
	sys.exit(2)
for opt, arg in opts:
	if opt in ("-h", "--help"):
		usage()
		sys.exit()
	if opt in ("-v", "--version"):
		print("Rapid Automated Performance Indication for Dataplane "+version)
		sys.exit()
	if opt in ("--stack"):
		stack = arg
		print ("Using '"+stack+"' as name for the stack")
	elif opt in ("--vms"):
		vms = arg
		print ("Using Virtual Machines Description: "+vms)
	elif opt in ("--key"):
		key = arg
		print ("Using key: "+key)
	elif opt in ("--image"):
		image = arg
		print ("Using image: "+image)
	elif opt in ("--image_file"):
		image_file = arg
		print ("Using qcow2 file: "+image_file)
	elif opt in ("--dataplane_network"):
		dataplane_network = arg
		print ("Using dataplane network: "+ dataplane_network)
	elif opt in ("--subnet"):
		subnet = arg
		print ("Using dataplane subnet: "+ subnet)
	elif opt in ("--subnet_cidr"):
		subnet_cidr = arg
		print ("Using dataplane subnet: "+ subnet_cidr)
	elif opt in ("--internal_network"):
		internal_network = arg
		print ("Using control plane network: "+ internal_network)
	elif opt in ("--floating_network"):
		floating_network = arg
		print ("Using floating ip network: "+ floating_network)
	elif opt in ("--log"):
		loglevel = arg
		print ("Log level: "+ loglevel)


# create formatters
screen_formatter = logging.Formatter("%(message)s")
file_formatter = logging.Formatter("%(asctime)s - %(levelname)s - %(message)s")

# get a top-level logger,
# set its log level,
# BUT PREVENT IT from propagating messages to the root logger
#
log = logging.getLogger()
numeric_level = getattr(logging, loglevel.upper(), None)
if not isinstance(numeric_level, int):
	raise ValueError('Invalid log level: %s' % loglevel)
log.setLevel(numeric_level)
log.propagate = 0

# create a console handler
# and set its log level to the command-line option 
# 
console_handler = logging.StreamHandler(sys.stdout)
console_handler.setLevel(logging.INFO)
console_handler.setFormatter(screen_formatter)

# create a file handler
# and set its log level to DEBUG
#
log_file = 'CREATE' +stack +'.log'
file_handler = logging.handlers.RotatingFileHandler(log_file, backupCount=10)
#file_handler = log.handlers.TimedRotatingFileHandler(log_file, 'D', 1, 5)
file_handler.setLevel(numeric_level)
file_handler.setFormatter(file_formatter)

# add handlers to the logger
#
log.addHandler(file_handler)
log.addHandler(console_handler)

# Check if log exists and should therefore be rolled
needRoll = os.path.isfile(log_file)


# This is a stale log, so roll it
if needRoll:    
	# Add timestamp
	log.debug('\n---------\nLog closed on %s.\n---------\n' % time.asctime())
	# Roll over on application start
	log.handlers[0].doRollover()

# Add timestamp
log.debug('\n---------\nLog started on %s.\n---------\n' % time.asctime())

log.debug("createrapid.py version: "+version)
# Checking if the control network already exists, if not, stop the script
log.debug("Checking control plane network: " + internal_network)
cmd = 'openstack network list -f value -c Name'
log.debug (cmd)
Networks = subprocess.check_output(cmd , shell=True).decode().strip()
if internal_network in Networks:
	log.info("Control plane network (" + internal_network+")  already active")
else:
	log.exception("Control plane network " + internal_network + " not existing")
	raise Exception("Control plane network " + internal_network + " not existing")

# Checking if the floating ip network should be used. If yes, check if it exists and stop the script if it doesn't
if floating_network !='NO':
	log.debug("Checking floating ip network: " + floating_network)
	if floating_network in Networks:
		log.info("Floating ip network (" + floating_network + ")  already active")
	else:
		log.exception("Floating ip network " + floating_network + " not existing")
		raise Exception("Floating ip network " + floating_network + " not existing")

# Checking if the dataplane network already exists, if not create it
log.debug("Checking dataplane network: " + dataplane_network)
if dataplane_network in Networks:
	log.info("Dataplane network (" + dataplane_network + ") already active")
else:
	log.info('Creating dataplane network ...')
	cmd = 'openstack network create '+dataplane_network+' -f value -c status'
	log.debug(cmd)
	NetworkExist = subprocess.check_output(cmd , shell=True).decode().strip()
	if 'ACTIVE' in NetworkExist:
		log.info("Dataplane network created")
		# Checking if the dataplane subnet already exists, if not create it
		log.debug("Checking subnet: "+subnet)
		cmd = 'openstack subnet list -f value -c Name'
		log.debug (cmd)
		Subnets = subprocess.check_output(cmd , shell=True).decode().strip()
		if subnet in  Subnets:
			log.info("Subnet (" +subnet+ ") already exists")
		else:
			log.info('Creating subnet ...')
			cmd = 'openstack subnet create --network ' + dataplane_network + ' --subnet-range ' + subnet_cidr +' --gateway none ' + subnet+' -f value -c name'
			log.debug(cmd)
			Subnets = subprocess.check_output(cmd , shell=True).decode().strip()
			if subnet in Subnets:
				log.info("Subnet created")
			else :
				log.exception("Failed to create subnet: " + subnet)
				raise Exception("Failed to create subnet: " + subnet)
	else :
		log.exception("Failed to create dataplane network: " + dataplane_network)
		raise Exception("Failed to create dataplane network: " + dataplane_network)

# Checking if the image already exists, if not create it
log.debug("Checking image: " + image)
cmd = 'openstack image list -f value -c Name'
log.debug(cmd)
Images = subprocess.check_output(cmd , shell=True).decode().strip()
if image in Images:
	log.info("Image (" + image + ") already available")
else:
	log.info('Creating image ...')
	cmd = 'openstack image create  -f value -c status --disk-format qcow2 --container-format bare --public --file ./'+image_file+ ' ' +image
	log.debug(cmd)
	ImageExist = subprocess.check_output(cmd , shell=True).decode().strip()
	if 'active' in ImageExist:
		log.info('Image created and active')
#		cmd = 'openstack image set --property hw_vif_multiqueue_enabled="true" ' +image
#		subprocess.check_call(cmd , shell=True)
	else :
		log.exception("Failed to create image")
		raise Exception("Failed to create image")

# Checking if the key already exists, if not create it
log.debug("Checking key: "+key)
cmd = 'openstack keypair list -f value -c Name'
log.debug (cmd)
KeyExist = subprocess.check_output(cmd , shell=True).decode().strip()
if key in KeyExist:
	log.info("Key ("+key+") already installed")
else:
	log.info('Creating key ...')
	cmd = 'openstack keypair create '+ key + '>' +key+'.pem'
	log.debug(cmd)
	subprocess.check_call(cmd , shell=True)
	cmd = 'chmod 600 ' +key+'.pem'
	subprocess.check_call(cmd , shell=True)
	cmd = 'openstack keypair list -f value -c Name'
	log.debug(cmd)
	KeyExist = subprocess.check_output(cmd , shell=True).decode().strip()
	if key in KeyExist:
		log.info("Key created")
	else :
		log.exception("Failed to create key: " + key)
		raise Exception("Failed to create key: " + key)

ServerToBeCreated=[]
ServerName=[]
config = ConfigParser.RawConfigParser()
vmconfig = ConfigParser.RawConfigParser()
vmconfig.read(vms)
total_number_of_VMs = vmconfig.get('DEFAULT', 'total_number_of_vms')
cmd = 'openstack server list -f value -c Name'
log.debug (cmd)
Servers = subprocess.check_output(cmd , shell=True).decode().strip()
cmd = 'openstack flavor list -f value -c Name'
log.debug (cmd)
Flavors = subprocess.check_output(cmd , shell=True).decode().strip()
for vm in range(1, int(total_number_of_VMs)+1):
	flavor_info = vmconfig.get('VM%d'%vm, 'flavor_info')
	flavor_meta_data = vmconfig.get('VM%d'%vm, 'flavor_meta_data')
	boot_info = vmconfig.get('VM%d'%vm, 'boot_info')
	SRIOV_port = vmconfig.get('VM%d'%vm, 'SRIOV_port')
	SRIOV_mgmt_port = vmconfig.get('VM%d'%vm, 'SRIOV_mgmt_port')
	ServerName.append('%s-VM%d'%(stack,vm))
	flavor_name = '%s-VM%d-flavor'%(stack,vm)
	log.debug("Checking server: " + ServerName[-1])
	if ServerName[-1] in Servers:
		log.info("Server (" + ServerName[-1] + ") already active")
		ServerToBeCreated.append("no")
	else:
		ServerToBeCreated.append("yes")
		# Checking if the flavor already exists, if not create it
		log.debug("Checking flavor: " + flavor_name)
		if flavor_name in Flavors:
			log.info("Flavor (" + flavor_name+") already installed")
		else:
			log.info('Creating flavor ...')
			cmd = 'openstack flavor create %s %s -f value -c name'%(flavor_name,flavor_info)
			log.debug(cmd)
			NewFlavor = subprocess.check_output(cmd , shell=True).decode().strip()
			if flavor_name in NewFlavor:
				cmd = 'openstack flavor set %s %s'%(flavor_name, flavor_meta_data)
				log.debug(cmd)
				subprocess.check_call(cmd , shell=True)
				log.info("Flavor created")
			else :
				log.exception("Failed to create flavor: " + flavor_name)
				raise Exception("Failed to create flavor: " + flavor_name)
		if SRIOV_mgmt_port == 'NO':
			nic_info = '--nic net-id=%s'%(internal_network)
		else:
			for port in SRIOV_mgmt_port.split(','):
				nic_info = '--nic port-id=%s'%(port)
		if SRIOV_port == 'NO':
			nic_info = nic_info + ' --nic net-id=%s'%(dataplane_network)
		else:
			for port in SRIOV_port.split(','):
				nic_info = nic_info + ' --nic port-id=%s'%(port)
		if vm==int(total_number_of_VMs):
			# For the last server, we want to wait for the server creation to complete, so the next operations will succeeed (e.g. IP allocation)
			# Note that this waiting is not bullet proof. Imagine, we loop through all the VMs, and the last VM was already running, while the previous
			# VMs still needed to be created. Or the previous server creations take much longer than the last one.
			# In that case, we might be too fast when we query for the IP & MAC addresses.
			wait = '--wait'
		else:
			wait = ''
		log.info("Creating server...")
		cmd = 'openstack server create --flavor %s --key-name %s --image %s %s %s %s %s'%(flavor_name,key,image,nic_info,boot_info,wait,ServerName[-1])
		log.debug(cmd)
		output = subprocess.check_output(cmd , shell=True).decode().strip()
if floating_network != 'NO':
	for vm in range(0, int(total_number_of_VMs)):
		if ServerToBeCreated[vm] =="yes":
			log.info('Creating & Associating floating IP for ('+ServerName[vm]+')...')
			cmd = 'openstack server show %s -c addresses -f value |grep -Eo "%s=[0-9]*\.[0-9]*\.[0-9]*\.[0-9]*" | cut -d"=" -f2'%(ServerName[vm],internal_network)
			log.debug(cmd)
			vmportIP = subprocess.check_output(cmd , shell=True).decode().strip()
			cmd = 'openstack port list -c ID -c "Fixed IP Addresses" | grep %s  | cut -d" " -f 2 ' %(vmportIP)
			log.debug(cmd)
			vmportID = subprocess.check_output(cmd , shell=True).decode().strip()
			cmd = 'openstack floating ip create --port %s %s'%(vmportID,floating_network)
			log.debug(cmd)
			output = subprocess.check_output(cmd , shell=True).decode().strip()

config.add_section('rapid')
config.set('rapid', 'loglevel', loglevel)
config.set('rapid', 'version', version)
config.set('rapid', 'total_number_of_machines', total_number_of_VMs)
for vm in range(1, int(total_number_of_VMs)+1):
	cmd = 'openstack server show %s'%(ServerName[vm-1])
	log.debug(cmd)
	output = subprocess.check_output(cmd , shell=True).decode().strip()
	searchString = '.*%s=([0-9]*\.[0-9]*\.[0-9]*\.[0-9]*)' %(dataplane_network)
	matchObj = re.search(searchString, output, re.DOTALL)
	vmDPIP = matchObj.group(1)
	searchString = '.*%s=([0-9]+\.[0-9]+\.[0-9]+\.[0-9]+),*\s*([0-9]+\.[0-9]+\.[0-9]+\.[0-9]+)*' %(internal_network)
	matchObj = re.search(searchString, output, re.DOTALL)
	vmAdminIP = matchObj.group(2)
	if vmAdminIP == None:
		vmAdminIP = matchObj.group(1)
	cmd = 'openstack port list |egrep  "\\b%s\\b" | tr -s " " | cut -d"|" -f 4'%(vmDPIP)
	log.debug(cmd)
	vmDPmac = subprocess.check_output(cmd , shell=True).decode().strip()
	config.add_section('M%d'%vm)
	config.set('M%d'%vm, 'name', ServerName[vm-1])
	config.set('M%d'%vm, 'admin_ip', vmAdminIP)
	config.set('M%d'%vm, 'dp_ip', vmDPIP)
	config.set('M%d'%vm, 'dp_mac', vmDPmac)
	log.info('%s: (admin IP: %s), (dataplane IP: %s), (dataplane MAC: %s)' % (ServerName[vm-1],vmAdminIP,vmDPIP,vmDPmac))

config.add_section('ssh')
config.set('ssh', 'key', key)
config.add_section('Varia')
config.set('Varia', 'VIM', 'OpenStack')
config.set('Varia', 'stack', stack)
config.set('Varia', 'VMs', vms)
config.set('Varia', 'image', image)
config.set('Varia', 'image_file', image_file)
config.set('Varia', 'dataplane_network', dataplane_network)
config.set('Varia', 'subnet', subnet)
config.set('Varia', 'subnet_cidr', subnet_cidr)
config.set('Varia', 'internal_network', internal_network)
config.set('Varia', 'floating_network', floating_network)
# Writing the environment file
with open(stack+'.env', 'wb') as envfile:
	config.write(envfile)