1 {-| Implementation of the Ganeti Query2 node group queries.
7 Copyright (C) 2012, 2013 Google Inc.
9 This program is free software; you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
11 the Free Software Foundation; either version 2 of the License, or
12 (at your option) any later version.
14 This program is distributed in the hope that it will be useful, but
15 WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
17 General Public License for more details.
19 You should have received a copy of the GNU General Public License
20 along with this program; if not, write to the Free Software
21 Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
26 module Ganeti.Query.Network
35 -- FIXME: everything except Runtime(..) and fieldsMap
36 -- is only exported for testing.
38 import qualified Data.Map as Map
39 import Data.Maybe (fromMaybe, mapMaybe)
40 import Data.List (find, foldl', intercalate)
45 import Ganeti.Query.Language
46 import Ganeti.Query.Common
47 import Ganeti.Query.Types
50 -- | There is no actual runtime.
51 data Runtime = Runtime
53 networkFields :: FieldList Network Runtime
55 [ (FieldDefinition "name" "Network" QFTText "Name",
56 FieldSimple (rsNormal . networkName), QffNormal)
57 , (FieldDefinition "network" "Subnet" QFTText "IPv4 subnet",
58 FieldSimple (rsNormal . networkNetwork), QffNormal)
59 , (FieldDefinition "gateway" "Gateway" QFTOther "IPv4 gateway",
60 FieldSimple (rsMaybeUnavail . networkGateway), QffNormal)
61 , (FieldDefinition "network6" "IPv6Subnet" QFTOther "IPv6 subnet",
62 FieldSimple (rsMaybeUnavail . networkNetwork6), QffNormal)
63 , (FieldDefinition "gateway6" "IPv6Gateway" QFTOther "IPv6 gateway",
64 FieldSimple (rsMaybeUnavail . networkGateway6), QffNormal)
65 , (FieldDefinition "mac_prefix" "MacPrefix" QFTOther "MAC address prefix",
66 FieldSimple (rsMaybeUnavail . networkMacPrefix), QffNormal)
67 , (FieldDefinition "free_count" "FreeCount" QFTNumber "Number of available\
69 FieldSimple (rsMaybeNoData . fmap getFreeCount . createAddressPool),
71 , (FieldDefinition "map" "Map" QFTText "Actual mapping",
72 FieldSimple (rsMaybeNoData . fmap getMap . createAddressPool),
74 , (FieldDefinition "reserved_count" "ReservedCount" QFTNumber
75 "Number of reserved addresses",
76 FieldSimple (rsMaybeNoData . fmap getReservedCount . createAddressPool),
78 , (FieldDefinition "group_list" "GroupList" QFTOther
79 "List of nodegroups (group name, NIC mode, NIC link)",
80 FieldConfig (\cfg -> rsNormal . getGroupConnections cfg . networkUuid),
82 , (FieldDefinition "group_cnt" "NodeGroups" QFTNumber "Number of nodegroups",
83 FieldConfig (\cfg -> rsNormal . length . getGroupConnections cfg
84 . networkUuid), QffNormal)
85 , (FieldDefinition "inst_list" "InstanceList" QFTOther "List of instances",
86 FieldConfig (\cfg -> rsNormal . getInstances cfg . networkUuid),
88 , (FieldDefinition "inst_cnt" "Instances" QFTNumber "Number of instances",
89 FieldConfig (\cfg -> rsNormal . length . getInstances cfg
90 . networkUuid), QffNormal)
91 , (FieldDefinition "external_reservations" "ExternalReservations" QFTText
92 "External reservations",
93 FieldSimple getExtReservationsString, QffNormal)
95 uuidFields "Network" ++
96 serialFields "Network" ++
99 -- | The group fields map.
100 fieldsMap :: FieldMap Network Runtime
102 Map.fromList $ map (\v@(f, _, _) -> (fdefName f, v)) networkFields
104 -- TODO: the following fields are not implemented yet: external_reservations
106 -- | Given a network's UUID, this function lists all connections from
107 -- the network to nodegroups including the respective mode and links.
108 getGroupConnections :: ConfigData -> String -> [(String, String, String)]
109 getGroupConnections cfg network_uuid =
110 mapMaybe (getGroupConnection network_uuid)
111 ((Map.elems . fromContainer . configNodegroups) cfg)
113 -- | Given a network's UUID and a node group, this function assembles
114 -- a tuple of the group's name, the mode and the link by which the
115 -- network is connected to the group. Returns 'Nothing' if the network
116 -- is not connected to the group.
117 getGroupConnection :: String -> NodeGroup -> Maybe (String, String, String)
118 getGroupConnection network_uuid group =
119 let networks = fromContainer . groupNetworks $ group
120 in case Map.lookup network_uuid networks of
123 Just (groupName group, getNicMode net, getNicLink net)
125 -- | Retrieves the network's mode and formats it human-readable,
126 -- also in case it is not available.
127 getNicMode :: PartialNicParams -> String
128 getNicMode nic_params =
129 maybe "-" nICModeToRaw $ nicpModeP nic_params
131 -- | Retrieves the network's link and formats it human-readable, also in
132 -- case it it not available.
133 getNicLink :: PartialNicParams -> String
134 getNicLink nic_params = fromMaybe "-" (nicpLinkP nic_params)
136 -- | Retrieves the network's instances' names.
137 getInstances :: ConfigData -> String -> [String]
138 getInstances cfg network_uuid =
139 map instName (filter (instIsConnected cfg network_uuid)
140 ((Map.elems . fromContainer . configInstances) cfg))
142 -- | Helper function that checks if an instance is linked to the given network.
143 instIsConnected :: ConfigData -> String -> Instance -> Bool
144 instIsConnected cfg network_uuid inst =
145 network_uuid `elem` mapMaybe (getNetworkUuid cfg)
146 (mapMaybe nicNetwork (instNics inst))
148 -- | Helper function to look up a network's UUID by its name
149 getNetworkUuid :: ConfigData -> String -> Maybe String
150 getNetworkUuid cfg name =
151 let net = find (\n -> name == fromNonEmpty (networkName n))
152 ((Map.elems . fromContainer . configNetworks) cfg)
153 in fmap networkUuid net
155 -- | Computes the reservations list for a network.
157 -- This doesn't use the netmask for validation of the length, instead
158 -- simply iterating over the reservations string.
159 getReservations :: Ip4Network -> String -> [Ip4Address]
160 getReservations (Ip4Network net _) =
163 foldl' (\(accu, addr) c ->
164 let addr' = nextIp4Address addr
168 _ -> -- FIXME: the reservations string
169 -- should be a proper type
171 in (accu', addr')) ([], net)
173 -- | Computes the external reservations as string for a network.
174 getExtReservationsString :: Network -> ResultEntry
175 getExtReservationsString net =
176 let addrs = getReservations (networkNetwork net)
177 (fromMaybe "" $ networkExtReservations net)
178 in rsNormal . intercalate ", " $ map show addrs
180 -- | Dummy function for collecting live data (which networks don't have).
181 collectLiveData :: Bool -> ConfigData -> [Network] -> IO [(Network, Runtime)]
182 collectLiveData _ _ = return . map (\n -> (n, Runtime))