diff options
Diffstat (limited to 'resources/libraries/python')
| -rw-r--r-- | resources/libraries/python/ContainerUtils.py | 754 | ||||
| -rw-r--r-- | resources/libraries/python/VppConfigGenerator.py | 75 |
2 files changed, 771 insertions, 58 deletions
diff --git a/resources/libraries/python/ContainerUtils.py b/resources/libraries/python/ContainerUtils.py new file mode 100644 index 0000000000..fb2695fe44 --- /dev/null +++ b/resources/libraries/python/ContainerUtils.py @@ -0,0 +1,754 @@ +# Copyright (c) 2017 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. + +# Bug workaround in pylint for abstract classes. +#pylint: disable=W0223 + +"""Library to manipulate Containers.""" + +from collections import OrderedDict, Counter + +from resources.libraries.python.ssh import SSH +from resources.libraries.python.constants import Constants +from resources.libraries.python.CpuUtils import CpuUtils +from resources.libraries.python.VppConfigGenerator import VppConfigGenerator + + +__all__ = ["ContainerManager", "ContainerEngine", "LXC", "Docker", "Container"] + +SUPERVISOR_CONF = '/etc/supervisord.conf' + + +class ContainerManager(object): + """Container lifecycle management class.""" + + def __init__(self, engine): + """Initialize Container Manager class. + + :param engine: Container technology used (LXC/Docker/...). + :type engine: str + :raises NotImplementedError: If container technology is not implemented. + """ + try: + self.engine = globals()[engine]() + except KeyError: + raise NotImplementedError('{e} is not implemented.' + .format(e=engine)) + self.containers = OrderedDict() + + def get_container_by_name(self, name): + """Get container instance. + + :param name: Container name. + :type name: str + :returns: Container instance. + :rtype: Container + :raises RuntimeError: If failed to get container with name. + """ + try: + return self.containers[name] + except KeyError: + raise RuntimeError('Failed to get container with name: {n}' + .format(n=name)) + + def construct_container(self, **kwargs): + """Construct container object on node with specified parameters. + + :param kwargs: Key-value pairs used to construct container. + :param kwargs: dict + """ + # Create base class + self.engine.initialize() + # Set parameters + for key in kwargs: + setattr(self.engine.container, key, kwargs[key]) + + # Set additional environmental variables + setattr(self.engine.container, 'env', + 'MICROSERVICE_LABEL={n}'.format(n=kwargs['name'])) + + # Set cpuset.cpus cgroup + skip_cnt = kwargs['cpu_skip'] + if not kwargs['cpu_shared']: + skip_cnt += kwargs['i'] * kwargs['cpu_count'] + self.engine.container.cpuset_cpus = \ + CpuUtils.cpu_slice_of_list_per_node(node=kwargs['node'], + cpu_node=kwargs['cpuset_mems'], + skip_cnt=skip_cnt, + cpu_cnt=kwargs['cpu_count'], + smt_used=kwargs['smt_used']) + + # Store container instance + self.containers[kwargs['name']] = self.engine.container + + def construct_containers(self, **kwargs): + """Construct 1..N container(s) on node with specified name. + Ordinal number is automatically added to the name of container as + suffix. + + :param kwargs: Name of container. + :param kwargs: str + """ + name = kwargs['name'] + for i in range(kwargs['count']): + # Name will contain ordinal suffix + kwargs['name'] = ''.join([name, str(i+1)]) + # Create container + self.construct_container(i=i, **kwargs) + + def acquire_all_containers(self): + """Acquire all containers.""" + for container in self.containers: + self.engine.container = self.containers[container] + self.engine.acquire() + + def build_all_containers(self): + """Build all containers.""" + for container in self.containers: + self.engine.container = self.containers[container] + self.engine.build() + + def create_all_containers(self): + """Create all containers.""" + for container in self.containers: + self.engine.container = self.containers[container] + self.engine.create() + + def execute_on_container(self, name, command): + """Execute command on container with name. + + :param name: Container name. + :param command: Command to execute. + :type name: str + :type command: str + """ + self.engine.container = self.get_container_by_name(name) + self.engine.execute(command) + + def execute_on_all_containers(self, command): + """Execute command on all containers. + + :param command: Command to execute. + :type command: str + """ + for container in self.containers: + self.engine.container = self.containers[container] + self.engine.execute(command) + + def install_vpp_in_all_containers(self): + """Install VPP into all containers.""" + for container in self.containers: + self.engine.container = self.containers[container] + # We need to install supervisor client/server system to control VPP + # as a service + self.engine.install_supervisor() + self.engine.install_vpp() + self.engine.restart_vpp() + + def configure_vpp_in_all_containers(self, vat_template_file): + """Configure VPP in all containers. + + :param vat_template_file: Template file name of a VAT script. + :type vat_template_file: str + """ + # Count number of DUTs based on node's host information + dut_cnt = len(Counter([self.containers[container].node['host'] + for container in self.containers])) + container_cnt = len(self.containers) + mod = dut_cnt/container_cnt + + for i, container in enumerate(self.containers): + self.engine.container = self.containers[container] + self.engine.create_vpp_startup_config() + self.engine.create_vpp_exec_config(vat_template_file, + memif_id1=i % mod * 2 + 1, + memif_id2=i % mod * 2 + 2, + socket1='memif-{c.name}-1' + .format(c=self.engine.container), + socket2='memif-{c.name}-2' + .format(c=self.engine.container)) + + def stop_all_containers(self): + """Stop all containers.""" + for container in self.containers: + self.engine.container = self.containers[container] + self.engine.stop() + + def destroy_all_containers(self): + """Destroy all containers.""" + for container in self.containers: + self.engine.container = self.containers[container] + self.engine.destroy() + + +class ContainerEngine(object): + """Abstract class for container engine.""" + + def __init__(self): + """Init ContainerEngine object.""" + self.container = None + + def initialize(self): + """Initialize container object.""" + self.container = Container() + + def acquire(self, force): + """Acquire/download container. + + :param force: Destroy a container if exists and create. + :type force: bool + """ + raise NotImplementedError + + def build(self): + """Build container (compile).""" + raise NotImplementedError + + def create(self): + """Create/deploy container.""" + raise NotImplementedError + + def execute(self, command): + """Execute process inside container. + + :param command: Command to run inside container. + :type command: str + """ + raise NotImplementedError + + def stop(self): + """Stop container.""" + raise NotImplementedError + + def destroy(self): + """Destroy/remove container.""" + raise NotImplementedError + + def info(self): + """Info about container.""" + raise NotImplementedError + + def system_info(self): + """System info.""" + raise NotImplementedError + + def install_supervisor(self): + """Install supervisord inside a container.""" + self.execute('sleep 3') + self.execute('apt-get update') + self.execute('apt-get install -y supervisor') + self.execute('echo "{0}" > {1}' + .format( + '[unix_http_server]\n' + 'file = /tmp/supervisor.sock\n\n' + '[rpcinterface:supervisor]\n' + 'supervisor.rpcinterface_factory = ' + 'supervisor.rpcinterface:make_main_rpcinterface\n\n' + '[supervisorctl]\n' + 'serverurl = unix:///tmp/supervisor.sock\n\n' + '[supervisord]\n' + 'pidfile = /tmp/supervisord.pid\n' + 'identifier = supervisor\n' + 'directory = /tmp\n' + 'logfile=/tmp/supervisord.log\n' + 'loglevel=debug\n' + 'nodaemon=false\n\n', + SUPERVISOR_CONF)) + self.execute('supervisord -c {0}'.format(SUPERVISOR_CONF)) + + def install_vpp(self, install_dkms=False): + """Install VPP inside a container. + + :param install_dkms: If install dkms package. This will impact install + time. Dkms is required for installation of vpp-dpdk-dkms. Default is + false. + :type install_dkms: bool + """ + self.execute('ln -s /dev/null /etc/sysctl.d/80-vpp.conf') + self.execute('apt-get update') + if install_dkms: + self.execute('apt-get install -y dkms && ' + 'dpkg -i --force-all {0}/install_dir/*.deb' + .format(self.container.guest_dir)) + else: + self.execute('for i in $(ls -I \"*dkms*\" {0}/install_dir/); ' + 'do dpkg -i --force-all {0}/install_dir/$i; done' + .format(self.container.guest_dir)) + self.execute('apt-get -f install -y') + self.execute('echo "{0}" >> {1}' + .format( + '[program:vpp]\n' + 'command=/usr/bin/vpp -c /etc/vpp/startup.conf\n' + 'autorestart=false\n' + 'redirect_stderr=true\n' + 'priority=1', + SUPERVISOR_CONF)) + self.execute('supervisorctl reload') + + def restart_vpp(self): + """Restart VPP service inside a container.""" + self.execute('supervisorctl restart vpp') + + def create_vpp_startup_config(self, + config_filename='/etc/vpp/startup.conf'): + """Create base startup configuration of VPP on container. + + :param config_filename: Startup configuration file name. + :type config_filename: str + """ + cpuset_cpus = self.container.cpuset_cpus + + # Create config instance + vpp_config = VppConfigGenerator() + vpp_config.set_node(self.container.node) + vpp_config.set_config_filename(config_filename) + vpp_config.add_unix_cli_listen() + vpp_config.add_unix_nodaemon() + vpp_config.add_unix_exec('/tmp/running.exec') + # We will pop first core from list to be main core + vpp_config.add_cpu_main_core(str(cpuset_cpus.pop(0))) + # if this is not only core in list, the rest will be used as workers. + if cpuset_cpus: + corelist_workers = ','.join(str(cpu) for cpu in cpuset_cpus) + vpp_config.add_cpu_corelist_workers(corelist_workers) + vpp_config.add_plugin_disable('dpdk_plugin.so') + + self.execute('mkdir -p /etc/vpp/') + self.execute('echo "{c}" | tee {f}' + .format(c=vpp_config.get_config_str(), + f=vpp_config.get_config_filename())) + + def create_vpp_exec_config(self, vat_template_file, **args): + """Create VPP exec configuration on container. + + :param vat_template_file: File name of a VAT template script. + :param args: Parameters for VAT script. + :type vat_template_file: str + :type args: dict + """ + vat_file_path = '{p}/{f}'.format(p=Constants.RESOURCES_TPL_VAT, + f=vat_template_file) + + with open(vat_file_path, 'r') as template_file: + cmd_template = template_file.readlines() + for line_tmpl in cmd_template: + vat_cmd = line_tmpl.format(**args) + self.execute('echo "{c}" >> /tmp/running.exec' + .format(c=vat_cmd.replace('\n', ''))) + + def is_container_running(self): + """Check if container is running.""" + raise NotImplementedError + + def is_container_present(self): + """Check if container is present.""" + raise NotImplementedError + + +class LXC(ContainerEngine): + """LXC implementation.""" + + def __init__(self): + """Initialize LXC object.""" + super(LXC, self).__init__() + + def acquire(self, force=True): + """Acquire a privileged system object where configuration is stored and + where user information can be stored. + + :param force: If a container exists, destroy it and create a new + container. + :type force: bool + :raises RuntimeError: If creating the container or writing the container + config fails. + """ + if self.is_container_present(): + if force: + self.destroy() + else: + return + + image = self.container.image if self.container.image else\ + "-d ubuntu -r xenial -a amd64" + + cmd = 'lxc-create -t download --name {c.name} -- {image} '\ + '--no-validate'.format(c=self.container, image=image) + + ret, _, _ = self.container.ssh.exec_command_sudo(cmd, timeout=1800) + if int(ret) != 0: + raise RuntimeError('Failed to create container.') + + if self.container.host_dir and self.container.guest_dir: + entry = 'lxc.mount.entry = '\ + '{c.host_dir} /var/lib/lxc/{c.name}/rootfs{c.guest_dir} ' \ + 'none bind,create=dir 0 0'.format(c=self.container) + ret, _, _ = self.container.ssh.exec_command_sudo( + "sh -c 'echo \"{e}\" >> /var/lib/lxc/{c.name}/config'" + .format(e=entry, c=self.container)) + if int(ret) != 0: + raise RuntimeError('Failed to write {c.name} config.' + .format(c=self.container)) + + def create(self): + """Create/deploy an application inside a container on system. + + :raises RuntimeError: If creating the container fails. + """ + cpuset_cpus = '{0}'.format( + ','.join('%s' % cpu for cpu in self.container.cpuset_cpus))\ + if self.container.cpuset_cpus else '' + + cmd = 'lxc-start --name {c.name} --daemon'.format(c=self.container) + + ret, _, _ = self.container.ssh.exec_command_sudo(cmd) + if int(ret) != 0: + raise RuntimeError('Failed to start container {c.name}.' + .format(c=self.container)) + self._lxc_wait('RUNNING') + self._lxc_cgroup(state_object='cpuset.cpus', + value=cpuset_cpus) + + def execute(self, command): + """Start a process inside a running container. Runs the specified + command inside the container specified by name. The container has to + be running already. + + :param command: Command to run inside container. + :type command: str + :raises RuntimeError: If running the command failed. + """ + env = '--keep-env {0}'.format( + ' '.join('--set-var %s' % env for env in self.container.env))\ + if self.container.env else '' + + cmd = "lxc-attach {env} --name {c.name} -- /bin/sh -c '{command}'"\ + .format(env=env, c=self.container, command=command) + + ret, _, _ = self.container.ssh.exec_command_sudo(cmd, timeout=180) + if int(ret) != 0: + raise RuntimeError('Failed to run command inside container ' + '{c.name}.'.format(c=self.container)) + + def stop(self): + """Stop a container. + + :raises RuntimeError: If stopping the container failed. + """ + cmd = 'lxc-stop --name {c.name}'.format(c=self.container) + + ret, _, _ = self.container.ssh.exec_command_sudo(cmd) + if int(ret) != 0: + raise RuntimeError('Failed to stop container {c.name}.' + .format(c=self.container)) + self._lxc_wait('STOPPED|FROZEN') + + def destroy(self): + """Destroy a container. + + :raises RuntimeError: If destroying container failed. + """ + cmd = 'lxc-destroy --force --name {c.name}'.format(c=self.container) + + ret, _, _ = self.container.ssh.exec_command_sudo(cmd) + if int(ret) != 0: + raise RuntimeError('Failed to destroy container {c.name}.' + .format(c=self.container)) + + def info(self): + """Query and shows information about a container. + + :raises RuntimeError: If getting info about a container failed. + """ + cmd = 'lxc-info --name {c.name}'.format(c=self.container) + + ret, _, _ = self.container.ssh.exec_command_sudo(cmd) + if int(ret) != 0: + raise RuntimeError('Failed to get info about container {c.name}.' + .format(c=self.container)) + + def system_info(self): + """Check the current kernel for LXC support. + + :raises RuntimeError: If checking LXC support failed. + """ + cmd = 'lxc-checkconfig' + + ret, _, _ = self.container.ssh.exec_command_sudo(cmd) + if int(ret) != 0: + raise RuntimeError('Failed to check LXC support.') + + def is_container_running(self): + """Check if container is running on node. + + :returns: True if container is running. + :rtype: bool + :raises RuntimeError: If getting info about a container failed. + """ + cmd = 'lxc-info --no-humanize --state --name {c.name}'\ + .format(c=self.container) + + ret, stdout, _ = self.container.ssh.exec_command_sudo(cmd) + if int(ret) != 0: + raise RuntimeError('Failed to get info about container {c.name}.' + .format(c=self.container)) + return True if 'RUNNING' in stdout else False + + def is_container_present(self): + """Check if container is existing on node. + + :returns: True if container is present. + :rtype: bool + :raises RuntimeError: If getting info about a container failed. + """ + cmd = 'lxc-info --no-humanize --name {c.name}'.format(c=self.container) + + ret, _, _ = self.container.ssh.exec_command_sudo(cmd) + return False if int(ret) else True + + def _lxc_wait(self, state): + """Wait for a specific container state. + + :param state: Specify the container state(s) to wait for. + :type state: str + :raises RuntimeError: If waiting for state of a container failed. + """ + cmd = 'lxc-wait --name {c.name} --state "{s}"'\ + .format(c=self.container, s=state) + + ret, _, _ = self.container.ssh.exec_command_sudo(cmd) + if int(ret) != 0: + raise RuntimeError('Failed to wait for state "{s}" of container ' + '{c.name}.'.format(s=state, c=self.container)) + + def _lxc_cgroup(self, state_object, value=''): + """Manage the control group associated with a container. + + :param state_object: Specify the state object name. + :param value: Specify the value to assign to the state object. If empty, + then action is GET, otherwise is action SET. + :type state_object: str + :type value: str + :raises RuntimeError: If getting/setting state of a container failed. + """ + cmd = 'lxc-cgroup --name {c.name} {s} {v}'\ + .format(c=self.container, s=state_object, v=value) + + ret, _, _ = self.container.ssh.exec_command_sudo( + 'cgset --copy-from / lxc') + if int(ret) != 0: + raise RuntimeError('Failed to copy cgroup settings from root.') + + ret, _, _ = self.container.ssh.exec_command_sudo(cmd) + if int(ret) != 0: + if value: + raise RuntimeError('Failed to set {s} of container {c.name}.' + .format(s=state_object, c=self.container)) + else: + raise RuntimeError('Failed to get {s} of container {c.name}.' + .format(s=state_object, c=self.container)) + + +class Docker(ContainerEngine): + """Docker implementation.""" + + def __init__(self): + """Initialize Docker object.""" + super(Docker, self).__init__() + + def acquire(self, force=True): + """Pull an image or a repository from a registry. + + :param force: Destroy a container if exists. + :type force: bool + :raises RuntimeError: If pulling a container failed. + """ + if self.is_container_present(): + if force: + self.destroy() + else: + return + + cmd = 'docker pull {c.image}'.format(c=self.container) + + ret, _, _ = self.container.ssh.exec_command_sudo(cmd, timeout=1800) + if int(ret) != 0: + raise RuntimeError('Failed to create container {c.name}.' + .format(c=self.container)) + + def create(self): + """Create/deploy container. + + :raises RuntimeError: If creating a container failed. + """ + cpuset_cpus = '--cpuset-cpus={0}'.format( + ','.join('%s' % cpu for cpu in self.container.cpuset_cpus))\ + if self.container.cpuset_cpus else '' + + cpuset_mems = '--cpuset-mems={0}'.format(self.container.cpuset_mems)\ + if self.container.cpuset_mems is not None else '' + + env = '{0}'.format( + ' '.join('--env %s' % env for env in self.container.env))\ + if self.container.env else '' + + command = '{0}'.format(self.container.command)\ + if self.container.command else '' + + publish = '{0}'.format( + ' '.join('--publish %s' % var for var in self.container.publish))\ + if self.container.publish else '' + + volume = '--volume {c.host_dir}:{c.guest_dir}'.format(c=self.container)\ + if self.container.host_dir and self.container.guest_dir else '' + + cmd = 'docker run '\ + '--privileged --detach --interactive --tty --rm '\ + '--cgroup-parent lxc {cpuset_cpus} {cpuset_mems} {publish} '\ + '{env} {volume} --name {container.name} {container.image} '\ + '{command}'.format(cpuset_cpus=cpuset_cpus, cpuset_mems=cpuset_mems, + container=self.container, command=command, + env=env, publish=publish, volume=volume) + + ret, _, _ = self.container.ssh.exec_command_sudo(cmd) + if int(ret) != 0: + raise RuntimeError('Failed to create container {c.name}' + .format(c=self.container)) + + self.info() + + def execute(self, command): + """Start a process inside a running container. Runs the specified + command inside the container specified by name. The container has to + be running already. + + :param command: Command to run inside container. + :type command: str + :raises RuntimeError: If runnig the command in a container failed. + """ + cmd = "docker exec --interactive {c.name} /bin/sh -c '{command}'"\ + .format(c=self.container, command=command) + + ret, _, _ = self.container.ssh.exec_command_sudo(cmd, timeout=180) + if int(ret) != 0: + raise RuntimeError('Failed to execute command in container ' + '{c.name}.'.format(c=self.container)) + + def stop(self): + """Stop running container. + + :raises RuntimeError: If stopping a container failed. + """ + cmd = 'docker stop {c.name}'.format(c=self.container) + + ret, _, _ = self.container.ssh.exec_command_sudo(cmd) + if int(ret) != 0: + raise RuntimeError('Failed to stop container {c.name}.' + .format(c=self.container)) + + def destroy(self): + """Remove a container. + + :raises RuntimeError: If removing a container failed. + """ + cmd = 'docker rm --force {c.name}'.format(c=self.container) + + ret, _, _ = self.container.ssh.exec_command_sudo(cmd) + if int(ret) != 0: + raise RuntimeError('Failed to destroy container {c.name}.' + .format(c=self.container)) + + def info(self): + """Return low-level information on Docker objects. + + :raises RuntimeError: If getting info about a container failed. + """ + cmd = 'docker inspect {c.name}'.format(c=self.container) + + ret, _, _ = self.container.ssh.exec_command_sudo(cmd) + if int(ret) != 0: + raise RuntimeError('Failed to get info about container {c.name}.' + .format(c=self.container)) + + def system_info(self): + """Display the docker system-wide information. + + :raises RuntimeError: If displaying system information failed. + """ + cmd = 'docker system info' + + ret, _, _ = self.container.ssh.exec_command_sudo(cmd) + if int(ret) != 0: + raise RuntimeError('Failed to get system info.') + + def is_container_present(self): + """Check if container is present on node. + + :returns: True if container is present. + :rtype: bool + :raises RuntimeError: If getting info about a container failed. + """ + cmd = 'docker ps --all --quiet --filter name={c.name}'\ + .format(c=self.container) + + ret, stdout, _ = self.container.ssh.exec_command_sudo(cmd) + if int(ret) != 0: + raise RuntimeError('Failed to get info about container {c.name}.' + .format(c=self.container)) + return True if stdout else False + + def is_container_running(self): + """Check if container is running on node. + + :returns: True if container is running. + :rtype: bool + :raises RuntimeError: If getting info about a container failed. + """ + cmd = 'docker ps --quiet --filter name={c.name}'\ + .format(c=self.container) + + ret, stdout, _ = self.container.ssh.exec_command_sudo(cmd) + if int(ret) != 0: + raise RuntimeError('Failed to get info about container {c.name}.' + .format(c=self.container)) + return True if stdout else False + + +class Container(object): + """Container class.""" + + def __init__(self): + """Initialize Container object.""" + pass + + def __getattr__(self, attr): + try: + return self.__dict__[attr] + except KeyError: + return None + + def __setattr__(self, attr, value): + try: + # Check if attribute exists + self.__dict__[attr] + except KeyError: + # Creating new attribute + if attr == 'node': + self.__dict__['ssh'] = SSH() + self.__dict__['ssh'].connect(value) + self.__dict__[attr] = value + else: + # Updating attribute base of type + if isinstance(self.__dict__[attr], list): + self.__dict__[attr].append(value) + else: + self.__dict__[attr] = value diff --git a/resources/libraries/python/VppConfigGenerator.py b/resources/libraries/python/VppConfigGenerator.py index dac8bae6bb..7bd0175b3d 100644 --- a/resources/libraries/python/VppConfigGenerator.py +++ b/resources/libraries/python/VppConfigGenerator.py @@ -61,6 +61,23 @@ class VppConfigGenerator(object): """ self._vpp_config_filename = filename + def get_config_filename(self): + """Get startup configuration filename. + + :returns: Startup configuration filename. + :rtype: str + """ + return self._vpp_config_filename + + def get_config_str(self): + """Get dumped startup configuration in VPP config format. + + :returns: Startup configuration in VPP config format. + :rtype: str + """ + self.dump_config(self._nodeconfig) + return self._vpp_config + def add_config_item(self, config, value, path): """Add startup configuration item. @@ -349,61 +366,3 @@ class VppConfigGenerator(object): else: raise RuntimeError('VPP failed to restart on node {}'. format(self._hostname)) - - def apply_config_lxc(self, lxc_name, waittime=5, retries=12): - """Generate and apply VPP configuration for node in a container. - - Use data from calls to this class to form a startup.conf file and - replace /etc/vpp/startup.conf with it on node inside a container. - - :param lxc_name: LXC container name. - :param waittime: Time to wait for VPP to restart (default 5 seconds). - :param retries: Number of times (default 12) to re-try waiting. - :type lxc_name: str - :type waittime: int - :type retries: int - :raises RuntimeError: If writing config file failed, or restarting of - VPP failed. - """ - self.dump_config(self._nodeconfig) - - ssh = SSH() - ssh.connect(self._node) - - # We're using this "| sudo tee" construct because redirecting - # a sudo's output ("sudo echo xxx > /path/to/file") does not - # work on most platforms... - (ret, _, _) = \ - ssh.exec_command_lxc('echo "{0}" | sudo tee {1}'. - format(self._vpp_config, - self._vpp_config_filename), lxc_name) - - if ret != 0: - raise RuntimeError('Writing config file failed in {0} to node {1}'. - format(lxc_name, self._hostname)) - - # Instead of restarting, we'll do separate start and stop - # actions. This way we don't care whether VPP was running - # to begin with. - ssh.exec_command_lxc('service {0} stop'. - format(self._vpp_service_name), lxc_name) - (ret, _, _) = \ - ssh.exec_command_lxc('service {0} start'. - format(self._vpp_service_name), lxc_name) - if ret != 0: - raise RuntimeError('Restarting VPP failed in {0} on node {1}'. - format(lxc_name, self._hostname)) - - # Sleep <waittime> seconds, up to <retry> times, - # and verify if VPP is running. - for _ in range(retries): - time.sleep(waittime) - (ret, _, _) = \ - ssh.exec_command_lxc('echo show hardware-interfaces | ' - 'nc 0 5002 || echo "VPP not yet running"', - lxc_name) - if ret == 0: - break - else: - raise RuntimeError('VPP failed to restart in {0} on node {1}'. - format(lxc_name, self._hostname)) |