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app.py
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#!/usr/bin/env python
import os
# When we're running locally we don't need to do this.
if 'OPENSHIFT_PYTHON_DIR' in os.environ:
virtenv = os.environ['OPENSHIFT_PYTHON_DIR'] + '/virtenv/'
virtualenv = os.path.join(virtenv, 'bin/activate_this.py')
try:
execfile(virtualenv, dict(__file__=virtualenv))
except IOError:
pass
# requires: pyramid, netaddr, jinja2
import json
import sys
# hack to make sure we can load wsgi.py as a module in this class
sys.path.insert(0, os.path.dirname(__file__))
import jinja2
import netaddr
from pyramid import config
from pyramid import renderers
from pyramid import response
from pyramid import view
from wsgiref.simple_server import make_server
import validator
config_template = """# Config generated by undercloud wizard
# Use these values in undercloud.conf
[DEFAULT]
undercloud_hostname = %(undercloud_hostname)s
local_interface = %(local_interface)s
local_mtu = %(local_mtu)s
local_ip = %(local_ip)s
undercloud_public_host = %(undercloud_public_host)s
undercloud_admin_host = %(undercloud_admin_host)s
undercloud_service_certificate = %(undercloud_service_certificate)s
generate_service_certificate = %(generate_service_certificate)s
scheduler_max_attempts = %(scheduler_max_attempts)s
# Deprecated names for compatibility with older releases
discovery_iprange = %(inspection_start)s,%(inspection_end)s
undercloud_public_vip = %(undercloud_public_host)s
undercloud_admin_vip = %(undercloud_admin_host)s
network_cidr = %(network_cidr)s
dhcp_start = %(dhcp_start)s
dhcp_end = %(dhcp_end)s
inspection_iprange = %(inspection_start)s,%(inspection_end)s
network_gateway = %(network_gateway)s
masquerade_network = %(masquerade_network)s
# End of deprecated names
[ctlplane-subnet]
cidr = %(network_cidr)s
gateway = %(network_gateway)s
dhcp_start = %(dhcp_start)s
dhcp_end = %(dhcp_end)s
inspection_iprange = %(inspection_start)s,%(inspection_end)s
masquerade = true
"""
default_basic = {'local_interface': 'eth1',
'network_cidr': '192.168.24.0/24',
'node_count': '2'}
# Keys that should be overwritten by Generate Advanced
advanced_overwrite = ['local_ip', 'dhcp_start', 'dhcp_end',
'inspection_start', 'inspection_end',
'network_gateway', 'undercloud_public_host',
'undercloud_admin_host',
]
# NOTE(bnemec): Adding an arbitrary 10 to the node count, to allow
# for virtual ips. This may not be accurate for some setups.
virtual_ips = 10
# local_ip, public_vip, admin_vip
undercloud_ips = 3
class GeneratorError(RuntimeError):
pass
def err_callback(message):
raise GeneratorError(message)
def process_request(request):
"""Return the appropriate response data for a request
Returns a tuple of (template, params) representing the appropriate
data to put in a response to request.
"""
# Remove unset keys so we can use .get() to set defaults
params = {k: v for k, v in request.params.items() if v}
# If generating advanced values, ignore any advanced values passed in
# as part of the request
if 'genadv' in params:
params = {k: v for k, v in params.items()
if k not in advanced_overwrite}
loader = jinja2.FileSystemLoader('templates')
env = jinja2.Environment(loader=loader)
if params.get('generate'):
t = env.get_template('generate.jinja2')
else:
t = env.get_template('ucw.jinja2')
values = dict(default_basic)
values['error'] = ''
for k, v in values.items():
if k in params:
values[k] = params[k]
# Populate descriptions
with open('opt-descriptions.json') as f:
descriptions = json.loads(f.read())
values.update(descriptions)
try:
cidr = netaddr.IPNetwork(values['network_cidr'])
if (cidr.size < int(values['node_count']) * 2 + virtual_ips +
undercloud_ips + 1):
raise GeneratorError('Insufficient addresses available in '
'provisioning CIDR')
values['undercloud_hostname'] = params.get('undercloud_hostname',
'undercloud.localdomain')
values['local_ip'] = params.get('local_ip',
'%s/%s' % (str(cidr[1]),
cidr.prefixlen))
values['local_mtu'] = params.get('local_mtu', '1500')
values['network_gateway'] = params.get('network_gateway', str(cidr[1]))
values['undercloud_public_host'] = params.get('undercloud_public_host',
str(cidr[2]))
values['undercloud_admin_host'] = params.get('undercloud_admin_host',
str(cidr[3]))
# 4 to allow room for two undercloud vips
dhcp_start = 1 + undercloud_ips
values['dhcp_start'] = params.get('dhcp_start', str(cidr[dhcp_start]))
dhcp_end = dhcp_start + int(values['node_count']) + virtual_ips - 1
values['dhcp_end'] = params.get('dhcp_end', str(cidr[dhcp_end]))
inspection_start = dhcp_end + 1
values['inspection_start'] = params.get('inspection_start',
str(cidr[inspection_start]))
inspection_end = inspection_start + int(values['node_count']) - 1
values['inspection_end'] = params.get('inspection_end',
str(cidr[inspection_end]))
values['masquerade_network'] = values['network_cidr']
values['undercloud_service_certificate'] = params.get(
'undercloud_service_certificate', '')
values['generate_service_certificate'] = params.get(
'generate_service_certificate', 'False')
# NOTE(bnemec): Clamping to a minimum of 10. I'm not sure this is
# necessary, but since we default to 30 for this opt I think it's
# safe to set a lower bound.
values['scheduler_max_attempts'] = str(max(10,
int(values['node_count'])))
# This must happen after all the other values have been set
values['config'] = config_template.replace('\n', '<br>') % values
validator.validate_config(values, err_callback)
except Exception as e:
values['error'] = str(e)
return t, values
@view.view_config(route_name='ucw')
def ucw(request):
template, params = process_request(request)
return response.Response(template.render(**params))
if __name__ == '__main__':
conf = config.Configurator()
conf.add_route('ucw', '/')
conf.scan()
app = conf.make_wsgi_app()
try:
ip = os.environ['OPENSHIFT_PYTHON_IP']
port = int(os.environ['OPENSHIFT_PYTHON_PORT'])
except KeyError:
# OpenShift 3 doesn't believe in backwards compatibility
ip = '0.0.0.0'
port = 8080
server = make_server(ip, port, app)
server.serve_forever()