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authorViacheslav <v.gletenko@vyos.io>2021-11-23 18:11:10 +0000
committerViacheslav <v.gletenko@vyos.io>2021-11-26 09:43:13 +0000
commit47584e030f3341b265e826643951648982cb20d0 (patch)
tree60a6861e2c84da01722ec39384b254be488c4c46 /src
parenta2fe5dc40d439a28deb4d09e78fcf93aba4555a4 (diff)
downloadvyos-1x-47584e030f3341b265e826643951648982cb20d0.tar.gz
vyos-1x-47584e030f3341b265e826643951648982cb20d0.zip
netns: T3829: Ability to configure network namespaces
Diffstat (limited to 'src')
-rwxr-xr-xsrc/conf_mode/netns.py118
1 files changed, 118 insertions, 0 deletions
diff --git a/src/conf_mode/netns.py b/src/conf_mode/netns.py
new file mode 100755
index 000000000..0924eb616
--- /dev/null
+++ b/src/conf_mode/netns.py
@@ -0,0 +1,118 @@
+#!/usr/bin/env python3
+#
+# Copyright (C) 2021 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 os
+
+from sys import exit
+from tempfile import NamedTemporaryFile
+
+from vyos.config import Config
+from vyos.configdict import node_changed
+from vyos.ifconfig import Interface
+from vyos.util import call
+from vyos.util import dict_search
+from vyos.util import get_interface_config
+from vyos import ConfigError
+from vyos import airbag
+airbag.enable()
+
+
+def netns_interfaces(c, match):
+ """
+ get NETNS bound interfaces
+ """
+ matched = []
+ old_level = c.get_level()
+ c.set_level(['interfaces'])
+ section = c.get_config_dict([], get_first_key=True)
+ for type in section:
+ interfaces = section[type]
+ for name in interfaces:
+ interface = interfaces[name]
+ if 'netns' in interface:
+ v = interface.get('netns', '')
+ if v == match:
+ matched.append(name)
+
+ c.set_level(old_level)
+ return matched
+
+def get_config(config=None):
+ if config:
+ conf = config
+ else:
+ conf = Config()
+
+ base = ['netns']
+ netns = conf.get_config_dict(base, get_first_key=True,
+ no_tag_node_value_mangle=True)
+
+ # determine which NETNS has been removed
+ for name in node_changed(conf, base + ['name']):
+ if 'netns_remove' not in netns:
+ netns.update({'netns_remove' : {}})
+
+ netns['netns_remove'][name] = {}
+ # get NETNS bound interfaces
+ interfaces = netns_interfaces(conf, name)
+ if interfaces: netns['netns_remove'][name]['interface'] = interfaces
+
+ return netns
+
+def verify(netns):
+ # ensure NETNS is not assigned to any interface
+ if 'netns_remove' in netns:
+ for name, config in netns['netns_remove'].items():
+ if 'interface' in config:
+ raise ConfigError(f'Can not remove NETNS "{name}", it still has '\
+ f'member interfaces!')
+
+ if 'name' in netns:
+ for name, config in netns['name'].items():
+ print(name)
+
+ return None
+
+
+def generate(netns):
+ if not netns:
+ return None
+
+ return None
+
+
+def apply(netns):
+
+ for tmp in (dict_search('netns_remove', netns) or []):
+ if os.path.isfile(f'/run/netns/{tmp}'):
+ call(f'ip netns del {tmp}')
+
+ if 'name' in netns:
+ for name, config in netns['name'].items():
+ if not os.path.isfile(f'/run/netns/{name}'):
+ call(f'ip netns add {name}')
+
+ return None
+
+if __name__ == '__main__':
+ try:
+ c = get_config()
+ verify(c)
+ generate(c)
+ apply(c)
+ except ConfigError as e:
+ print(e)
+ exit(1)