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import json
import yaml
import StringIO
import copy
from hashlib import md5
from paramiko import RSAKey
from paramiko.ssh_exception import PasswordRequiredException
class HEATUtils:
""" Utilities useful for constructing OpenStack HEAT requests """
def get_yaml(self, template_file):
"""Template Yaml To Json reads a YAML Heat template file returns a JSON string that can be used included in an Openstack Add Stack Request"""
if isinstance(template_file, basestring):
fin = open(template_file, 'r')
yamlobj = yaml.load(fin)
return yamlobj
return None
def template_yaml_to_json(self, template_file):
"""Template Yaml To Json reads a YAML Heat template file returns a JSON string that can be used included in an Openstack Add Stack Request"""
if isinstance(template_file, basestring):
fin = open(template_file, 'r')
yamlobj = yaml.load(fin)
fin.close()
if 'heat_template_version' in yamlobj:
datetime = yamlobj['heat_template_version']
yamlobj['heat_template_version'] = str(datetime)
fout = StringIO.StringIO()
json.dump(yamlobj, fout)
contents = fout.getvalue()
fout.close()
return contents
def env_yaml_to_json(self, template_file):
"""Env Yaml To JSon reads a YAML Heat env file and returns a JSON string that can be used included in an Openstack Add Stack Request"""
if isinstance(template_file, basestring):
fin = open(template_file, 'r')
yamlobj = yaml.load(fin)
fin.close()
if 'parameters' in yamlobj:
fout = StringIO.StringIO()
json.dump(yamlobj['parameters'], fout)
contents = fout.getvalue()
fout.close()
return contents
return None
def stack_info_parse(self, stack_info):
""" returns a flattened version of the Openstack Find Stack results """
d = {}
if isinstance(stack_info, dict):
s = stack_info['stack']
p = s['parameters']
d = copy.deepcopy(p)
d['id'] = s['id']
d['name'] = s['stack_name']
d['stack_status'] = s['stack_status']
return d
def match_fingerprint(self, pvt_file, pw, fingerprint):
try:
sshKey = RSAKey.from_private_key_file(pvt_file, pw)
keybytes = md5(sshKey.asbytes()).hexdigest()
printableFingerprint = ':'.join(a+b for a,b in zip(keybytes[::2], keybytes[1::2]))
return printableFingerprint == fingerprint.__str__()
except PasswordRequiredException:
return False
def match_private_key_file_to_keypair(self, files, keypair):
for keyfile in files:
if (self.match_fingerprint(keyfile, None, keypair['keypair']['fingerprint'])):
return keyfile
return None
def get_openstack_server_ip(self, server, network_name="public", ipversion=4):
ipaddr = None
try:
versions = server['addresses'][network_name]
for version in versions:
if version['version'] == ipversion:
ipaddr = version['addr']
break;
except ValueError:
return ipaddr
return ipaddr
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