Revision 06c056d3
| b/lib/network.py | ||
|---|---|---|
| 29 | 29 |
|
| 30 | 30 |
from ganeti import errors |
| 31 | 31 |
|
| 32 |
|
|
| 33 |
def _ComputeIpv4NumHosts(network_size): |
|
| 34 |
"""Derives the number of hosts in an IPv4 network from the size. |
|
| 35 |
|
|
| 36 |
""" |
|
| 37 |
return 2 ** (32 - network_size) |
|
| 38 |
|
|
| 39 |
|
|
| 32 | 40 |
IPV4_NETWORK_MIN_SIZE = 30 |
| 33 |
IPV4_NETWORK_MIN_NUM_HOSTS = 2 ** (32 - IPV4_NETWORK_MIN_SIZE) |
|
| 41 |
# FIXME: This limit is for performance reasons. Remove when refactoring |
|
| 42 |
# for performance tuning was successful. |
|
| 43 |
IPV4_NETWORK_MAX_SIZE = 16 |
|
| 44 |
IPV4_NETWORK_MIN_NUM_HOSTS = _ComputeIpv4NumHosts(IPV4_NETWORK_MIN_SIZE) |
|
| 45 |
IPV4_NETWORK_MAX_NUM_HOSTS = _ComputeIpv4NumHosts(IPV4_NETWORK_MAX_SIZE) |
|
| 34 | 46 |
|
| 35 | 47 |
|
| 36 | 48 |
class AddressPool(object): |
| ... | ... | |
| 58 | 70 |
self.net = network |
| 59 | 71 |
|
| 60 | 72 |
self.network = ipaddr.IPNetwork(self.net.network) |
| 73 |
if self.network.numhosts > IPV4_NETWORK_MAX_NUM_HOSTS: |
|
| 74 |
raise errors.AddressPoolError("A big network with %s host(s) is currently"
|
|
| 75 |
" not supported. please specify at most a" |
|
| 76 |
" /%s network" % |
|
| 77 |
(str(self.network.numhosts), |
|
| 78 |
IPV4_NETWORK_MAX_SIZE)) |
|
| 79 |
|
|
| 61 | 80 |
if self.network.numhosts < IPV4_NETWORK_MIN_NUM_HOSTS: |
| 62 | 81 |
raise errors.AddressPoolError("A network with only %s host(s) is too"
|
| 63 | 82 |
" small, please specify at least a /%s" |
Also available in: Unified diff