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authorChristian Poessinger <christian@poessinger.com>2019-08-20 11:56:08 +0200
committerChristian Poessinger <christian@poessinger.com>2019-08-20 11:56:08 +0200
commit3f225b56f576d30bd163f975c821e8baf2be6d28 (patch)
tree52f30462a63ccf20d3f35735d01605a242172624 /src/migration-scripts/dns-forwarding/1-to-2
parent34e69abedb61b293dee097e67ecda45457da1b75 (diff)
downloadvyos-1x-3f225b56f576d30bd163f975c821e8baf2be6d28.tar.gz
vyos-1x-3f225b56f576d30bd163f975c821e8baf2be6d28.zip
powerdns: T1595: add config migrator to remove 'listen-on'
Diffstat (limited to 'src/migration-scripts/dns-forwarding/1-to-2')
-rwxr-xr-xsrc/migration-scripts/dns-forwarding/1-to-278
1 files changed, 78 insertions, 0 deletions
diff --git a/src/migration-scripts/dns-forwarding/1-to-2 b/src/migration-scripts/dns-forwarding/1-to-2
new file mode 100755
index 000000000..31ba5573f
--- /dev/null
+++ b/src/migration-scripts/dns-forwarding/1-to-2
@@ -0,0 +1,78 @@
+#!/usr/bin/env python3
+#
+# Copyright (C) 2019 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/>.
+#
+
+# This migration script will remove the deprecated 'listen-on' statement
+# from the dns forwarding service and will add the corresponding
+# listen-address nodes instead. This is required as PowerDNS can only listen
+# on interface addresses and not on interface names.
+
+import sys
+
+from ipaddress import ip_interface
+from vyos.configtree import ConfigTree
+from vyos.interfaces import get_type_of_interface
+
+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)
+
+base = ['service', 'dns', 'forwarding']
+if not config.exists(base):
+ # Nothing to do
+ sys.exit(0)
+else:
+ if config.exists(base + ['listen-on']):
+ listen_intf = config.return_values(base + ['listen-on'])
+ # Delete node with abandoned command
+ config.delete(base + ['listen-on'])
+
+ # retrieve interface addresses for every configured listen-on interface
+ listen_addr = []
+ for intf in listen_intf:
+ # we need to treat vif and vif-s interfaces differently,
+ # both "real interfaces" use dots for vlan identifiers - those
+ # need to be exchanged with vif and vif-s identifiers
+ if intf.count('.') == 1:
+ # this is a regular VLAN interface
+ intf = intf.split('.')[0] + ' vif ' + intf.split('.')[1]
+ elif intf.count('.') == 2:
+ # this is a QinQ VLAN interface
+ intf = intf.split('.')[0] + ' vif-s ' + intf.split('.')[1] + ' vif-c ' + intf.split('.')[2]
+
+ path = ['interfaces', get_type_of_interface(intf), intf, 'address']
+
+ # retrieve corresponding interface addresses in CIDR format
+ # those need to be converted in pure IP addresses without network information
+ for addr in config.return_values(path):
+ listen_addr.append( ip_interface(addr).ip )
+
+ for addr in listen_addr:
+ config.set(base + ['listen-address'], value=addr, replace=False)
+
+ try:
+ with open(file_name, 'w') as f:
+ f.write(config.to_string())
+ except OSError as e:
+ print("Failed to save the modified config: {}".format(e))
+ sys.exit(1)