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#!/usr/bin/env python

# Copyright (c) 2018 Orange and others.
#
# All rights reserved. This program and the accompanying materials
# are made available under the terms of the Apache License, Version 2.0
# which accompanies this distribution, and is available at
# http://www.apache.org/licenses/LICENSE-2.0

"""
Shaker_ wraps around popular system network testing tools like iperf, iperf3
and netperf (with help of flent). Shaker is able to deploy OpenStack instances
and networks in different topologies. Shaker scenario specifies the deployment
and list of tests to execute.

.. _Shaker: http://pyshaker.readthedocs.io/en/latest/
"""

import logging
import os

import scp

from functest.core import singlevm


class Shaker(singlevm.SingleVm2):
    """Run shaker full+perf l2 and l3"""
    # pylint: disable=too-many-instance-attributes

    __logger = logging.getLogger(__name__)

    filename = '/home/opnfv/functest/images/shaker-image.qcow2'
    flavor_ram = 512
    flavor_vcpus = 1
    flavor_disk = 3
    username = 'ubuntu'
    port = 9000

    def create_sg_rules(self):
        """
        It adds one security group rule allowing ingress 9000/tcp

        Raises: Exception on error.
        """
        assert self.orig_cloud
        super(Shaker, self).create_sg_rules()
        self.orig_cloud.create_security_group_rule(
            self.sec.id, port_range_min=self.port, port_range_max=self.port,
            protocol='tcp', direction='ingress')

    def execute(self):
        """
        Returns:
            - 0 if success
            - 1 on operation error
        """
        assert self.ssh
        scpc = scp.SCPClient(self.ssh.get_transport())
        scpc.put('/home/opnfv/functest/conf/env_file', '~/')
        (_, stdout, stderr) = self.ssh.exec_command(
            'source ~/env_file && export OS_INTERFACE=public &&'
            'shaker --server-endpoint {}:9000 --scenario '
            'openstack/full_l2,openstack/full_l3_east_west,'
            'openstack/full_l3_north_south,openstack/perf_l2,'
            'openstack/perf_l3_east_west,openstack/perf_l3_north_south '
            '--report report.html --output report.json ; echo $?'.format(
                self.sshvm.public_v4))
        self.__logger.info("output:\n%s", stdout.read())
        self.__logger.info("error:\n%s", stderr.read())
        if not os.path.exists(self.res_dir):
            os.makedirs(self.res_dir)
        try:
            scpc.get('report.json', self.res_dir)
            scpc.get('report.html', self.res_dir)
        except scp.SCPException:
            self.__logger.exception("cannot get report files")
            return 1
        return stdout.channel.recv_exit_status()