slo-generator/generate.py

137 lines
5.2 KiB
Python

import glob
import sys
import itertools
import jinja2
import re
import yaml
import os
from nested_lookup import nested_lookup
from pathlib import Path
# defines
OUTPUT_FOLDER_BASENAME = os.path.basename("output")
TEMPLATE_FOLDER_BASENAME = os.path.basename("jinja-templates")
TEMPLATE_FILES = {
"terraform-template-1.j2":["builtin:service.keyRequest.errors.fivexx.rate"],
"terraform-template-2.j2":["builtin:service.keyRequest.errors.server.successCount"],
"terraform-template-3.j2":["builtin:service.keyRequest.errors.fivexx.count"],
"terraform-template-4.j2":["builtin:service.errors.server.successCount"],
"terraform-template-5.j2":["builtin:service.errors.fivexx.successCount"]
}
FOLDERS = {"My Journey":"DE-3",
"Connected Vehicle Platforms":"DE-7",
"My Life":"DE-4",
"China Services":"EC-DE"}
# methods
def template_logic(metric):
for template,metricElement in TEMPLATE_FILES.items():
if all([item in metricElement for item in metric]):
# if set(metricList) == set(metricTemplate):
return template
print("Problem occured while matching metric: Exiting program...")
sys.exit(0)
# main
def main(configFile):
slo_id = None
slo_name = None
module_name = None
displayname = None
department = None
description = None
doc_url = None
slo_definition_tresholds_warning = None
slo_definition_tresholds_failure = None
environments = {}
template = None
metric = None
services = []
keyRequests = []
try:
# read yaml file
with open(configFile) as cF:
slos = list(yaml.safe_load_all(cF))
except EnvironmentError:
print('Corrupt yaml file:' + str(configFile))
# fill values
for slo in slos:
slo_id = slo["slo_id"]
slo_name = slo["slo_name"]
module_name = slo_name
displayname = slo["displayname"]
description = slo["description"]
department = slo["department"]
doc_url = slo["doc_url"]
slo_definition_tresholds_warning = slo["slo_definition"]["tresholds"]["warning"]
slo_definition_tresholds_failure = slo["slo_definition"]["tresholds"]["failure"]
slo["slo_definition"].pop("tresholds")
for env in slo["slo_definition"]:
if "EMEA-Prod" in slo["slo_definition"]:
environments["EMEA-Prod"] = slo["slo_definition"][env]
if "NA-Prod" in slo["slo_definition"]:
environments["NA-Prod"] = slo["slo_definition"][env]
if "CN-Prod" in slo["slo_definition"]:
environments["CN-Prod"] = slo["slo_definition"][env]
# read template file
jinja_environment = jinja2.Environment(loader=jinja2.FileSystemLoader(TEMPLATE_FOLDER_BASENAME),
trim_blocks=True,
lstrip_blocks=True)
# generate terraform file
for environment,ev in environments.items():
folder_path = os.path.join(cwd,OUTPUT_FOLDER_BASENAME,environment.replace('-','_'),"slo")
if not os.path.exists(folder_path):
os.makedirs(folder_path)
metric = nested_lookup('metric',ev)
for service in ev[0]["filter"]:
services.append(nested_lookup('service',service))
keyRequests.append(nested_lookup('keyRequests',service))
with open(os.path.join(folder_path,module_name+".tf"),"w+") as file:
jinja_template = jinja_environment.get_template(template_logic(metric))
file.write(jinja_template.render(module=module_name,
slo_name=slo_name,
metric=metric[0],
description=description,
services='~",\n\t\t\t\t~"'.join(itertools.chain.from_iterable(services)),
keyRequests='~",\n\t\t\t\t~"'.join(itertools.chain.from_iterable(itertools.chain.from_iterable(keyRequests))),
target=slo_definition_tresholds_failure,
warning=slo_definition_tresholds_warning))
services = []
keyRequests = []
if __name__ == "__main__":
# pre-initialization get current working directory
cwd = os.getcwd()
print(sys.argv)
if len(sys.argv) != 2:
print(".\generate.py <FOLDER>")
print("Example: .\generate.py DE-3")
print("Example: .\generate.py DE-3,DE-4,...")
sys.exit()
# init folder
for folderName,businessLine in FOLDERS.items():
businessLinePath = os.path.join(cwd,os.path.basename(businessLine))
if not os.path.exists(businessLinePath):
os.makedirs(businessLinePath)
# for each folder
for arg in [sys.argv[1]]:
# return path of slo config files
configFiles = glob.glob(pathname=os.path.join(cwd,os.path.basename(arg))+'\\*.yaml',
# root_dir=os.path.join(cwd,os.path.basename(arg)),
recursive=True)
# for each slo config file in folder
for configFile in configFiles:
main(configFile)