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#!/usr/bin/env python
# Copyright (C) 2020 Ashwin Nayak
#
# 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.
""" program to perform extrapolation """
import os
import json
import logging
import argparse
import requests
from netaddr import IPNetwork
class Extrapolate():
"""Perform extrapolation"""
def __init__(self, pdf_fn, store_at):
# store external values
self.store_at = store_at
# initialzie internal values
self.pdf = None
self.ip_list = []
# initialization fucntions
self.start_logger()
self.download_pdf(pdf_fn)
if self.pdf is None:
self.read_pdf(pdf_fn)
self.get_ip(self.get_ipmi())
self.extrapolate()
def download_pdf(self, pdf_fn):
""" download pdf """
# check pdf_fn
if pdf_fn[:4] == "http":
# do a requests call and get value
try:
req = requests.get(pdf_fn)
self.pdf = json.loads(req.text)
except ConnectionError:
self.logger.exception("error downloading pdf")
raise
def start_logger(self):
""" starting logging process """
logging.basicConfig(filename='extrapolation.log',
filemode='w',
format='%(asctime)s,%(msecs)d %(name)s %(levelname)s %(message)s',
datefmt='%H:%M:%S',
level=logging.INFO)
self.logger = logging.getLogger('extrapolation')
self.logger.info("Starting extrapolation program")
def read_pdf(self, json_fn):
""" read platform descritpion file """
try:
with open(os.path.join(json_fn)) as json_file:
self.logger.debug(f"Reading the pdf file:{json_fn}")
self.pdf = json.loads(json_file.read())
except IOError:
self.logger.exception("Error while reading the pdf file")
raise
def save_pdf(self):
""" save the pdf file """
try:
with open(os.path.join(self.store_at, 'pdf_new.json'), 'w', encoding='utf-8')\
as json_file:
self.logger.debug(f"Saving the extrapolated pdf file named: pd_new.json at:{self.store_at}")
json.dump(self.pdf, json_file, indent=2)
except IOError:
self.logger.exception("Could not save the logger file")
def get_ipmi(self):
""" get ipmi cidr ip """
for val in self.pdf["networks"]:
if val["name"] == "ipmi" or val["name"] == "ilo":
return val["cidr"]
return "192.168.10.0/24"
def get_ip(self, value):
""" get list of valid ip's"""
self.logger.debug(f"getting list of ip's from {value}")
try:
for _ip in IPNetwork(value):
if str(_ip).split('.')[-1] != '0' and str(_ip).split('.')[-1] != '255':
self.ip_list.append(str(_ip))
except Exception:
self.logger.exception("error with the ip module")
raise
def get_ilo_info(self, count):
"""get ipmi info """
temp = dict()
if count > len(self.ip_list):
self.logger.error("No ip's avaialble!")
elif not self.pdf["extrapolation_info"]["ip_increment"].isdigit():
self.logger.error("ip increment value is not an integer")
else:
temp["ip"] = self.ip_list[count * int(self.pdf["extrapolation_info"]["ip_increment"])]
temp["user"] = self.pdf["extrapolation_info"]["ilo_user"]
temp["password"] = self.pdf["management_info"]["city"]\
+ self.pdf["management_info"]["area_name"]\
+ self.pdf["management_info"]["room_id"]+str(count + 1)
self.logger.debug(f"ipmi info:{temp}")
return temp
def extrapolate(self):
""" Perform Extrapolation """
self.logger.info("starting extrapolation")
list_servers = []
# get ipmi info
count = 0
for val in self.pdf["roles"]:
num_servers = int(val["count"]) # Number of servers in the particular role.
role = val["name"]
for idx in range(num_servers):
temp = dict()
temp["role_name"] = role
temp["device_name"] = str(role) + str(idx + 1)
temp["az_name"] = "default"
temp["ha_name"] = "default"
temp["ilo_info"] = self.get_ilo_info(count)
count += 1
list_servers.append(temp)
# save the pdf file
self.pdf["servers"] = list_servers
self.save_pdf()
self.logger.info("Extrapolation completed!")
if __name__ == "__main__":
# main class is for testing purposes
# Initiate the parser
PARSER = argparse.ArgumentParser(description="Extrapolation program")
# Add long argument for pdf file
PARSER.add_argument("--file", help="get pdf file name")
# Add long argument for store_at
PARSER.add_argument("--store_at", help="store the file at")
# Read arguments from the command line
ARGS = PARSER.parse_args()
# run the code
Extrapolate(ARGS.file, ARGS.store_at)
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