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authorDaniil Baturin <daniil@baturin.org>2018-09-18 23:18:32 +0200
committerDaniil Baturin <daniil@baturin.org>2018-09-18 23:18:32 +0200
commit13256810fec76f3be5590eb96a44eb40ce404082 (patch)
treeae0d4e3544140e956f4d83ce26de3fc96722d7cb /src/migration-scripts/quagga/2-to-3
parent0ac5a4f94a8a4e84ed73c2288bcb9a4c77b9b695 (diff)
downloadvyos-1x-13256810fec76f3be5590eb96a44eb40ce404082.tar.gz
vyos-1x-13256810fec76f3be5590eb96a44eb40ce404082.zip
T849: add a migration script for the new IPv4 BGP syntax.
Diffstat (limited to 'src/migration-scripts/quagga/2-to-3')
-rw-r--r--src/migration-scripts/quagga/2-to-3189
1 files changed, 189 insertions, 0 deletions
diff --git a/src/migration-scripts/quagga/2-to-3 b/src/migration-scripts/quagga/2-to-3
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index 000000000..158b6eafd
--- /dev/null
+++ b/src/migration-scripts/quagga/2-to-3
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+#!/usr/bin/env python3
+#
+# Copyright (C) 2018 VyOS maintainers and contributors
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License version 2 or later as
+# published by the Free Software Foundation.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program. If not, see <http://www.gnu.org/licenses/>.
+#
+#
+
+import sys
+
+from vyos.configtree import ConfigTree
+
+
+if (len(sys.argv) < 1):
+ print("Must specify file name!")
+ sys.exit(1)
+
+file_name = sys.argv[1]
+
+with open(file_name, 'r') as f:
+ config_file = f.read()
+
+config = ConfigTree(config_file)
+
+def migrate_neighbor(config, neighbor_path, neighbor):
+ if config.exists(neighbor_path):
+ neighbors = config.list_nodes(neighbor_path)
+ for neighbor in neighbors:
+ # Move the valueless options: as-override, next-hop-self, route-reflector-client, route-server-client,
+ # remove-private-as
+ for valueless_option in ['as-override', 'nexthop-self', 'route-reflector-client', 'route-server-client',
+ 'remove-private-as']:
+ if config.exists(neighbor_path + [neighbor, valueless_option]):
+ config.set(neighbor_path + [neighbor] + af_path + [valueless_option])
+ config.delete(neighbor_path + [neighbor, valueless_option])
+
+ # Move filter options: distribute-list, filter-list, prefix-list, and route-map
+ # They share the same syntax inside so we can group them
+ for filter_type in ['distribute-list', 'filter-list', 'prefix-list', 'route-map']:
+ if config.exists(neighbor_path + [neighbor, filter_type]):
+ for filter_dir in ['import', 'export']:
+ if config.exists(neighbor_path + [neighbor, filter_type, filter_dir]):
+ filter_name = config.return_value(neighbor_path + [neighbor, filter_type, filter_dir])
+ config.set(neighbor_path + [neighbor] + af_path + [filter_type, filter_dir], value=filter_name)
+ config.delete(neighbor_path + [neighbor, filter_type])
+
+ # Move simple leaf node options: maximum-prefix, unsuppress-map, weight
+ for leaf_option in ['maximum-prefix', 'unsuppress-map', 'weight']:
+ if config.exists(neighbor_path + [neighbor, leaf_option]):
+ if config.exists(neighbor_path + [neighbor, leaf_option]):
+ leaf_opt_value = config.return_value(neighbor_path + [neighbor, leaf_option])
+ config.set(neighbor_path + [neighbor] + af_path + [leaf_option], value=leaf_opt_value)
+ config.delete(neighbor_path + [neighbor, leaf_option])
+
+ # The rest is special cases, for better or worse
+
+ # Move allowas-in
+ if config.exists(neighbor_path + [neighbor, 'allowas-in']):
+ if config.exists(neighbor_path + [neighbor, 'allowas-in', 'number']):
+ allowas_in = config.return_value(neighbor_path + [neighbor, 'allowas-in', 'number'])
+ config.set(neighbor_path + [neighbor] + af_path + ['allowas-in', 'number'], value=allowas_in)
+ config.delete(neighbor_path + [neighbor, 'allowas-in'])
+
+ # Move attribute-unchanged options
+ if config.exists(neighbor_path + [neighbor, 'attribute-unchanged']):
+ for attr in ['as-path', 'med', 'next-hop']:
+ if config.exists(neighbor_path + [neighbor, 'attribute-unchanged', attr]):
+ config.set(neighbor_path + [neighbor] + af_path + ['attribute-unchanged', attr])
+ config.delete(neighbor_path + [neighbor, 'attribute-unchanged', attr])
+ config.delete(neighbor_path + [neighbor, 'attribute-unchanged'])
+
+ # Move capability options
+ if config.exists(neighbor_path + [neighbor, 'capability']):
+ # "capability dynamic" is a peer-global option, we only migrate ORF
+ if config.exists(neighbor_path + [neighbor, 'capability', 'orf']):
+ if config.exists(neighbor_path + [neighbor, 'capability', 'orf', 'prefix-list']):
+ for orf in ['send', 'receive']:
+ if config.exists(neighbor_path + [neighbor, 'capability', 'orf', 'prefix-list', orf]):
+ config.set(neighbor_path + [neighbor] + af_path + ['capability', 'orf', 'prefix-list', orf])
+ config.delete(neighbor_path + [neighbor, 'capability', 'orf', 'prefix-list', orf])
+ config.delete(neighbor_path + [neighbor, 'capability', 'orf', 'prefix-list'])
+ config.delete(neighbor_path + [neighbor, 'capability', 'orf'])
+
+ # Move default-originate
+ if config.exists(neighbor_path + [neighbor, 'default-originate']):
+ if config.exists(neighbor_path + [neighbor, 'default-originate', 'route-map']):
+ route_map = config.return_value(neighbor_path + [neighbor, 'default-originate', 'route-map'])
+ config.set(neighbor_path + [neighbor] + af_path + ['default-originate', 'route-map'], value=route_map)
+ else:
+ # Empty default-originate node is meaningful so we re-create it
+ config.set(neighbor_path + [neighbor] + af_path + ['default-originate'])
+ config.delete(neighbor_path + [neighbor, 'default-originate'])
+
+ # Move soft-reconfiguration
+ if config.exists(neighbor_path + [neighbor, 'soft-reconfiguration']):
+ if config.exists(neighbor_path + [neighbor, 'soft-reconfiguration', 'inbound']):
+ config.set(neighbor_path + [neighbor] + af_path + ['soft-reconfiguration', 'inbound'])
+ # Empty soft-reconfiguration is meaningless, so we just remove it
+ config.delete(neighbor_path + [neighbor, 'soft-reconfiguration'])
+
+ # Move disable-send-community
+ if config.exists(neighbor_path + [neighbor, 'disable-send-community']):
+ for comm_type in ['standard', 'extended']:
+ if config.exists(neighbor_path + [neighbor, 'disable-send-community', comm_type]):
+ config.set(neighbor_path + [neighbor] + af_path + ['disable-send-community', comm_type])
+ config.delete(neighbor_path + [neighbor, 'disable-send-community', comm_type])
+ config.delete(neighbor_path + [neighbor, 'disable-send-community'])
+
+
+if not config.exists(['protocols', 'bgp']):
+ # Nothing to do
+ sys.exit(0)
+else:
+ # Just to avoid writing it so many times
+ af_path = ['address-family', 'ipv4-unicast']
+
+ # Check if BGP is actually configured and obtain the ASN
+ asn_list = config.list_nodes(['protocols', 'bgp'])
+ if asn_list:
+ # There's always just one BGP node, if any
+ asn = asn_list[0]
+ bgp_path = ['protocols', 'bgp', asn]
+ else:
+ # There's actually no BGP, just its empty shell
+ sys.exit(0)
+
+ ## Move global IPv4-specific BGP options to "address-family ipv4-unicast"
+
+ # Move networks
+ network_path = ['protocols', 'bgp', asn, 'network']
+ if config.exists(network_path):
+ config.set(bgp_path + af_path + ['network'])
+ config.set_tag(bgp_path + af_path + ['network'])
+
+ networks = config.list_nodes(network_path)
+ for network in networks:
+ config.set(bgp_path + af_path + ['network', network])
+ if config.exists(network_path + [network, 'route-map']):
+ route_map = config.return_value(network_path + [network, 'route-map'])
+ config.set(bgp_path + af_path + ['network', network, 'route-map'], value=route_map)
+ config.delete(network_path)
+
+ # Move aggregate-address statements
+ aggregate_path = ['protocols', 'bgp', asn, 'aggregate-address']
+ if config.exists(aggregate_path):
+ print("Migrating aggregates")
+ config.set(bgp_path + af_path + ['aggregate-address'])
+ config.set_tag(bgp_path + af_path + ['aggregate-address'])
+
+ aggregates = config.list_nodes(aggregate_path)
+ for aggregate in aggregates:
+ config.set(bgp_path + af_path + ['aggregate-address', aggregate])
+ if config.exists(aggregate_path + [aggregate, 'as-set']):
+ config.set(bgp_path + af_path + ['aggregate-address', aggregate, 'as-set'])
+ if config.exists(aggregate_path + [aggregate, 'summary-only']):
+ config.set(bgp_path + af_path + ['aggregate-address', aggregate, 'summary-only'])
+ print("Deleting {0}".format(aggregate_path))
+ config.delete(aggregate_path)
+
+ ## Migrate neighbor options
+ neighbor_path = ['protocols', 'bgp', asn, 'neighbor']
+ if config.exists(neighbor_path):
+ neighbors = config.list_nodes(neighbor_path)
+ for neighbor in neighbors:
+ migrate_neighbor(config, neighbor_path, neighbor)
+
+ peer_group_path = ['protocols', 'bgp', asn, 'peer-group']
+ if config.exists(peer_group_path):
+ peer_groups = config.list_nodes(peer_group_path)
+ for peer_group in peer_groups:
+ migrate_neighbor(config, peer_group_path, peer_group)
+
+ try:
+ with open(file_name, 'w') as f:
+ f.write(config.to_string())
+ #print(config.to_string())
+ except OSError as e:
+ print("Failed to save the modified config: {}".format(e))
+ sys.exit(1)