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generate_yml_vars.py
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'''
usage: python ./generate_yml_vars.py
this python script generates yml files for Ansible (variables) from a csv file in the directories:
group_vars/DC1/vlans.yml
group_vars/DC2/vlans.yml
the csv file is created by a human, this script generates yml files consumed by ansible (Ansible variables)
'''
import csv
import yaml
from netaddr import IPNetwork
from pprint import pprint as pp
in_file = open('vars.csv', "r")
reader = csv.reader(in_file)
'''
>>> for i in reader:
... print i
...
['Vlan-id', 'Subnet', 'virtual_mac', 'DC1', 'DC2']
['201', '10.201.0.0/16', '00:25:01:00:00:01', 'True', 'False']
['202', '10.202.0.0/16', '00:25:02:00:00:01', 'True', 'True']
['203', '10.203.0.0/16', '00:25:03:00:00:01', 'False', 'True']
['204', '10.204.0.0/16', '00:25:04:00:00:01', 'False', 'False']
['205', '10.205.0.0/16', '00:25:05:00:00:01', 'False', 'True']
['206', '10.206.0.0/16', '00:25:06:00:00:01', 'False', 'True']
['207', '10.207.0.0/16', '00:25:07:00:00:01', 'True', 'False']
['208', '10.208.0.0/16', '00:25:08:00:00:01', 'True', 'True']
>>>
>>> for i in reader:
... print i[1]
...
. print i[1]
...
Subnet
10.201.0.0/16
10.202.0.0/16
10.203.0.0/16
10.204.0.0/16
10.205.0.0/16
10.206.0.0/16
10.207.0.0/16
10.208.0.0/16
>>>
'''
next(reader)
'''
>>> for i in reader:
... print i
...
['201', '10.201.0.0/16', '00:25:01:00:00:01', 'True', 'False']
['202', '10.202.0.0/16', '00:25:02:00:00:01', 'True', 'True']
['203', '10.203.0.0/16', '00:25:03:00:00:01', 'False', 'True']
['204', '10.204.0.0/16', '00:25:04:00:00:01', 'False', 'False']
['205', '10.205.0.0/16', '00:25:05:00:00:01', 'False', 'True']
['206', '10.206.0.0/16', '00:25:06:00:00:01', 'False', 'True']
['207', '10.207.0.0/16', '00:25:07:00:00:01', 'True', 'False']
['208', '10.208.0.0/16', '00:25:08:00:00:01', 'True', 'True']
>>>
'''
DC1_items = []
DC2_items = []
for i in reader:
# DC1
if i[3]=="True":
id = int(i[0])
vni = 20000 + int(i[0])
subnet = i[1]
virtual_mac = i[2]
name = 'VLAN' + str(id)
virtual_ip= str(IPNetwork(subnet)[1])
DC1_item = {'name': name, 'id':id, 'vni': vni,'subnet': subnet, 'virtual_ip'
: virtual_ip, 'virtual_mac': virtual_mac}
DC1_items.append(DC1_item)
# DC2
if i[4]=="True":
id = int(i[0])
vni = 20000 + int(i[0])
subnet = i[1]
virtual_mac = i[2]
name = 'VLAN' + str(id)
virtual_ip= str(IPNetwork(subnet)[1])
DC2_item = {'name': name, 'id':id, 'vni': vni,'subnet': subnet, 'virtual_ip'
: virtual_ip, 'virtual_mac': virtual_mac}
DC2_items.append(DC2_item)
'''
>>> pp(DC1_items)
[{'id': 201,
'name': 'VLAN201',
'subnet': '10.201.0.0/16',
'virtual_ip': '10.201.0.1',
'virtual_mac': '00:25:01:00:00:01',
'vni': 20201},
{'id': 202,
'name': 'VLAN202',
'subnet': '10.202.0.0/16',
'virtual_ip': '10.202.0.1',
'virtual_mac': '00:25:02:00:00:01',
'vni': 20202},
{'id': 207,
'name': 'VLAN207',
'subnet': '10.207.0.0/16',
'virtual_ip': '10.207.0.1',
'virtual_mac': '00:25:07:00:00:01',
'vni': 20207},
{'id': 208,
'name': 'VLAN208',
'subnet': '10.208.0.0/16',
'virtual_ip': '10.208.0.1',
'virtual_mac': '00:25:08:00:00:01',
'vni': 20208}]
>>>
>>>
>>> pp(DC2_items)
[{'id': 202,
'name': 'VLAN202',
'subnet': '10.202.0.0/16',
'virtual_ip': '10.202.0.1',
'virtual_mac': '00:25:02:00:00:01',
'vni': 20202},
{'id': 203,
'name': 'VLAN203',
'subnet': '10.203.0.0/16',
'virtual_ip': '10.203.0.1',
'virtual_mac': '00:25:03:00:00:01',
'vni': 20203},
{'id': 205,
'name': 'VLAN205',
'subnet': '10.205.0.0/16',
'virtual_ip': '10.205.0.1',
'virtual_mac': '00:25:05:00:00:01',
'vni': 20205},
{'id': 206,
'name': 'VLAN206',
'subnet': '10.206.0.0/16',
'virtual_ip': '10.206.0.1',
'virtual_mac': '00:25:06:00:00:01',
'vni': 20206},
{'id': 208,
'name': 'VLAN208',
'subnet': '10.208.0.0/16',
'virtual_ip': '10.208.0.1',
'virtual_mac': '00:25:08:00:00:01',
'vni': 20208}]
>>>
'''
out_file = open('group_vars/DC1/vlans.yml', "w")
out_file.write("vlanlist:\n")
out_file.write(yaml.dump(DC1_items, default_flow_style=False))
out_file.close()
out_file = open('group_vars/DC2/vlans.yml', "w")
out_file.write("vlanlist:\n")
out_file.write(yaml.dump(DC2_items, default_flow_style=False))
out_file.close()
in_file.close()