X-Git-Url: https://gerrit.fd.io/r/gitweb?a=blobdiff_plain;f=resources%2Flibraries%2Fpython%2FNamespaces.py;fp=resources%2Flibraries%2Fpython%2FNamespaces.py;h=d92dfd7e261c7a6cf0250c9efc6d737799327ddc;hb=7c3e0cc41f55327d6eeb04fe757c6e80064ab28a;hp=0000000000000000000000000000000000000000;hpb=dec1188c7f89f5f8f97085b5f68c6f1d918586b8;p=csit.git diff --git a/resources/libraries/python/Namespaces.py b/resources/libraries/python/Namespaces.py new file mode 100644 index 0000000000..d92dfd7e26 --- /dev/null +++ b/resources/libraries/python/Namespaces.py @@ -0,0 +1,96 @@ +# Copyright (c) 2016 Cisco and/or its affiliates. +# Licensed under the Apache License, Version 2.0 (the "License"); +# you may not use this file except in compliance with the License. +# You may obtain a copy of the License at: +# +# http://www.apache.org/licenses/LICENSE-2.0 +# +# Unless required by applicable law or agreed to in writing, software +# distributed under the License is distributed on an "AS IS" BASIS, +# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +# See the License for the specific language governing permissions and +# limitations under the License. + +"""Linux namespace utilities library.""" + +from resources.libraries.python.ssh import exec_cmd_no_error, exec_cmd, SSH + + +class Namespaces(object): + """Linux namespace utilities.""" + def __init__(self): + self._namespaces = [] + + def create_namespace(self, node, namespace_name): + """Create namespace and add the name to the list for later clean-up. + + :param node: Where to create namespace. + :param namespace_name: Name for namespace. + :type node: dict + :type namespace_name: str + """ + cmd = ('ip netns add {0}'.format(namespace_name)) + exec_cmd_no_error(node, cmd, sudo=True) + self._namespaces.append(namespace_name) + + @staticmethod + def attach_interface_to_namespace(node, namespace, interface): + """Attach specific interface to namespace. + + :param node: Node where to execute command. + :param namespace: Namespace to execute command on. + :param interface: Interface in namespace. + :type node: dict + :type namespace: str + :type interface: str + :raises RuntimeError: Interface could not be attached. + """ + cmd = 'ip link set {0} netns {1}'.format(interface, namespace) + (rc, _, stderr) = exec_cmd(node, cmd, timeout=5, sudo=True) + if rc != 0: + raise RuntimeError( + 'Could not attach interface, reason:{}'.format(stderr)) + cmd = 'ip netns exec {} ip link set {} up'.format( + namespace, interface) + (rc, _, stderr) = exec_cmd(node, cmd, timeout=5, sudo=True) + if rc != 0: + raise RuntimeError( + 'Could not set interface state, reason:{}'.format(stderr)) + + @staticmethod + def create_bridge_for_int_in_namespace( + node, namespace, bridge_name, *interfaces): + """Setup bridge domain and add interfaces to it. + + :param node: Node where to execute command. + :param namespace: Namespace to execute command on. + :param bridge_name: Name of the bridge to be created. + :param interfaces: List of interfaces to add to the namespace. + :type node: dict + :type namespace: str + :type bridge_name: str + :type interfaces: list + """ + cmd = 'ip netns exec {} brctl addbr {}'.format(namespace, bridge_name) + exec_cmd_no_error(node, cmd, sudo=True) + for interface in interfaces: + cmd = 'ip netns exec {} brctl addif {} {}'.format( + namespace, bridge_name, interface) + exec_cmd_no_error(node, cmd, sudo=True) + cmd = 'ip netns exec {} ip link set dev {} up'.format( + namespace, bridge_name) + exec_cmd_no_error(node, cmd, sudo=True) + + def clean_up_namespaces(self, node): + """Remove all old namespaces. + + :param node: Node where to execute command. + :type node: dict + :raises RuntimeError: Namespaces could not be cleaned properly. + """ + for namespace in self._namespaces: + print "Cleaning namespace {}".format(namespace) + cmd = 'ip netns delete {}'.format(namespace) + (rc, stdout, stderr) = exec_cmd(node, cmd, timeout=5, sudo=True) + if rc != 0: + raise RuntimeError('Could not delete namespace')