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#!/usr/bin/env python

##############################################################################
# Copyright (c) 2017 Tim Rozet (trozet@redhat.com) 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
##############################################################################

import argparse
import json
import logging
import os
import platform
import pprint
import shutil
import sys
import tempfile

import apex.virtual.configure_vm as vm_lib
import apex.virtual.utils as virt_utils
from apex import DeploySettings
from apex import Inventory
from apex import NetworkEnvironment
from apex import NetworkSettings
from apex.builders import common_builder as c_builder
from apex.builders import overcloud_builder as oc_builder
from apex.builders import undercloud_builder as uc_builder
from apex.common import utils
from apex.common import constants
from apex.common import parsers
from apex.common.exceptions import ApexDeployException
from apex.network import jumphost
from apex.network import network_data
from apex.undercloud import undercloud as uc_lib
from apex.overcloud import config as oc_cfg
from apex.overcloud import deploy as oc_deploy

APEX_TEMP_DIR = tempfile.mkdtemp(prefix='apex_tmp')
ANSIBLE_PATH = 'ansible/playbooks'
SDN_IMAGE = 'overcloud-full-opendaylight.qcow2'


def deploy_quickstart(args, deploy_settings_file, network_settings_file,
                      inventory_file=None):
    pass


def validate_cross_settings(deploy_settings, net_settings, inventory):
    """
    Used to validate compatibility across settings file.
    :param deploy_settings: parsed settings for deployment
    :param net_settings: parsed settings for network
    :param inventory: parsed inventory file
    :return: None
    """

    if deploy_settings['deploy_options']['dataplane'] != 'ovs' and 'tenant' \
            not in net_settings.enabled_network_list:
        raise ApexDeployException("Setting a DPDK based dataplane requires"
                                  "a dedicated NIC for tenant network")

    if 'odl_vpp_routing_node' in deploy_settings['deploy_options']:
        if deploy_settings['deploy_options']['dataplane'] != 'fdio':
            raise ApexDeployException("odl_vpp_routing_node should only be set"
                                      "when dataplane is set to fdio")
        if deploy_settings['deploy_options'].get('dvr') is True:
            raise ApexDeployException("odl_vpp_routing_node should only be set"
                                      "when dvr is not enabled")

    # TODO(trozet): add more checks here like RAM for ODL, etc
    # check if odl_vpp_netvirt is true and vpp is set
    # Check if fdio and nosdn:
    # tenant_nic_mapping_controller_members" ==
    # "$tenant_nic_mapping_compute_members


def build_vms(inventory, network_settings,
              template_dir='/usr/share/opnfv-apex'):
    """
    Creates VMs and configures vbmc and host
    :param inventory:
    :param network_settings:
    :return:
    """

    for idx, node in enumerate(inventory['nodes']):
        name = 'baremetal{}'.format(idx)
        volume = name + ".qcow2"
        volume_path = os.path.join(constants.LIBVIRT_VOLUME_PATH, volume)
        # TODO(trozet): add error checking
        vm_lib.create_vm(
            name, volume_path,
            baremetal_interfaces=network_settings.enabled_network_list,
            memory=node['memory'], cpus=node['cpu'],
            macs=node['mac'],
            template_dir=template_dir)
        virt_utils.host_setup({name: node['pm_port']})


def create_deploy_parser():
    deploy_parser = argparse.ArgumentParser()
    deploy_parser.add_argument('--debug', action='store_true', default=False,
                               help="Turn on debug messages")
    deploy_parser.add_argument('-l', '--log-file',
                               default='./apex_deploy.log',
                               dest='log_file', help="Log file to log to")
    deploy_parser.add_argument('-d', '--deploy-settings',
                               dest='deploy_settings_file',
                               required=True,
                               help='File which contains Apex deploy settings')
    deploy_parser.add_argument('-n', '--network-settings',
                               dest='network_settings_file',
                               required=True,
                               help='File which contains Apex network '
                                    'settings')
    deploy_parser.add_argument('-i', '--inventory-file',
                               dest='inventory_file',
                               default=None,
                               help='Inventory file which contains POD '
                                    'definition')
    deploy_parser.add_argument('-e', '--environment-file',
                               dest='env_file',
                               default='opnfv-environment.yaml',
                               help='Provide alternate base env file located '
                                    'in deploy_dir')
    deploy_parser.add_argument('-v', '--virtual', action='store_true',
                               default=False,
                               dest='virtual',
                               help='Enable virtual deployment')
    deploy_parser.add_argument('--interactive', action='store_true',
                               default=False,
                               help='Enable interactive deployment mode which '
                                    'requires user to confirm steps of '
                                    'deployment')
    deploy_parser.add_argument('--virtual-computes',
                               dest='virt_compute_nodes',
                               default=1,
                               type=int,
                               help='Number of Virtual Compute nodes to create'
                                    ' and use during deployment (defaults to 1'
                                    ' for noha and 2 for ha)')
    deploy_parser.add_argument('--virtual-cpus',
                               dest='virt_cpus',
                               default=4,
                               type=int,
                               help='Number of CPUs to use per Overcloud VM in'
                                    ' a virtual deployment (defaults to 4)')
    deploy_parser.add_argument('--virtual-default-ram',
                               dest='virt_default_ram',
                               default=8,
                               type=int,
                               help='Amount of default RAM to use per '
                                    'Overcloud VM in GB (defaults to 8).')
    deploy_parser.add_argument('--virtual-compute-ram',
                               dest='virt_compute_ram',
                               default=None,
                               type=int,
                               help='Amount of RAM to use per Overcloud '
                                    'Compute VM in GB (defaults to 8). '
                                    'Overrides --virtual-default-ram arg for '
                                    'computes')
    deploy_parser.add_argument('--deploy-dir',
                               default='/usr/share/opnfv-apex',
                               help='Directory to deploy from which contains '
                                    'base config files for deployment')
    deploy_parser.add_argument('--image-dir',
                               default='/var/opt/opnfv/images',
                               help='Directory which contains '
                                    'base disk images for deployment')
    deploy_parser.add_argument('--lib-dir',
                               default='/usr/share/opnfv-apex',
                               help='Directory path for apex ansible '
                                    'and third party libs')
    deploy_parser.add_argument('--quickstart', action='store_true',
                               default=False,
                               help='Use tripleo-quickstart to deploy')
    deploy_parser.add_argument('--upstream', action='store_true',
                               default=False,
                               help='Force deployment to use upstream '
                                    'artifacts')
    return deploy_parser


def validate_deploy_args(args):
    """
    Validates arguments for deploy
    :param args:
    :return: None
    """

    logging.debug('Validating arguments for deployment')
    if args.virtual and args.inventory_file is not None:
        logging.error("Virtual enabled but inventory file also given")
        raise ApexDeployException('You should not specify an inventory file '
                                  'with virtual deployments')
    elif args.virtual:
        args.inventory_file = os.path.join(APEX_TEMP_DIR,
                                           'inventory-virt.yaml')
    elif os.path.isfile(args.inventory_file) is False:
        logging.error("Specified inventory file does not exist: {}".format(
            args.inventory_file))
        raise ApexDeployException('Specified inventory file does not exist')

    for settings_file in (args.deploy_settings_file,
                          args.network_settings_file):
        if os.path.isfile(settings_file) is False:
            logging.error("Specified settings file does not "
                          "exist: {}".format(settings_file))
            raise ApexDeployException('Specified settings file does not '
                                      'exist: {}'.format(settings_file))


def main():
    parser = create_deploy_parser()
    args = parser.parse_args(sys.argv[1:])
    # FIXME (trozet): this is only needed as a workaround for CI.  Remove
    # when CI is changed
    if os.getenv('IMAGES', False):
        args.image_dir = os.getenv('IMAGES')
    if args.debug:
        log_level = logging.DEBUG
    else:
        log_level = logging.INFO
    os.makedirs(os.path.dirname(args.log_file), exist_ok=True)
    formatter = '%(asctime)s %(levelname)s: %(message)s'
    logging.basicConfig(filename=args.log_file,
                        format=formatter,
                        datefmt='%m/%d/%Y %I:%M:%S %p',
                        level=log_level)
    console = logging.StreamHandler()
    console.setLevel(log_level)
    console.setFormatter(logging.Formatter(formatter))
    logging.getLogger('').addHandler(console)
    validate_deploy_args(args)
    # Parse all settings
    deploy_settings = DeploySettings(args.deploy_settings_file)
    logging.info("Deploy settings are:\n {}".format(pprint.pformat(
                 deploy_settings)))
    net_settings = NetworkSettings(args.network_settings_file)
    logging.info("Network settings are:\n {}".format(pprint.pformat(
                 net_settings)))
    os_version = deploy_settings['deploy_options']['os_version']
    net_env_file = os.path.join(args.deploy_dir, constants.NET_ENV_FILE)
    net_env = NetworkEnvironment(net_settings, net_env_file,
                                 os_version=os_version)
    net_env_target = os.path.join(APEX_TEMP_DIR, constants.NET_ENV_FILE)
    utils.dump_yaml(dict(net_env), net_env_target)

    # get global deploy params
    ha_enabled = deploy_settings['global_params']['ha_enabled']
    introspect = deploy_settings['global_params'].get('introspect', True)

    if args.virtual:
        if args.virt_compute_ram is None:
            compute_ram = args.virt_default_ram
        else:
            compute_ram = args.virt_compute_ram
        if deploy_settings['deploy_options']['sdn_controller'] == \
                'opendaylight' and args.virt_default_ram < 12:
            control_ram = 12
            logging.warning('RAM per controller is too low.  OpenDaylight '
                            'requires at least 12GB per controller.')
            logging.info('Increasing RAM per controller to 12GB')
        elif args.virt_default_ram < 10:
            control_ram = 10
            logging.warning('RAM per controller is too low.  nosdn '
                            'requires at least 10GB per controller.')
            logging.info('Increasing RAM per controller to 10GB')
        else:
            control_ram = args.virt_default_ram
        if ha_enabled and args.virt_compute_nodes < 2:
            logging.debug('HA enabled, bumping number of compute nodes to 2')
            args.virt_compute_nodes = 2
        virt_utils.generate_inventory(args.inventory_file, ha_enabled,
                                      num_computes=args.virt_compute_nodes,
                                      controller_ram=control_ram * 1024,
                                      compute_ram=compute_ram * 1024,
                                      vcpus=args.virt_cpus
                                      )
    inventory = Inventory(args.inventory_file, ha_enabled, args.virtual)

    validate_cross_settings(deploy_settings, net_settings, inventory)
    ds_opts = deploy_settings['deploy_options']
    if args.quickstart:
        deploy_settings_file = os.path.join(APEX_TEMP_DIR,
                                            'apex_deploy_settings.yaml')
        utils.dump_yaml(utils.dict_objects_to_str(deploy_settings),
                        deploy_settings_file)
        logging.info("File created: {}".format(deploy_settings_file))
        network_settings_file = os.path.join(APEX_TEMP_DIR,
                                             'apex_network_settings.yaml')
        utils.dump_yaml(utils.dict_objects_to_str(net_settings),
                        network_settings_file)
        logging.info("File created: {}".format(network_settings_file))
        deploy_quickstart(args, deploy_settings_file, network_settings_file,
                          args.inventory_file)
    else:
        # TODO (trozet): add logic back from:
        # Iedb75994d35b5dc1dd5d5ce1a57277c8f3729dfd (FDIO DVR)
        ansible_args = {
            'virsh_enabled_networks': net_settings.enabled_network_list
        }
        utils.run_ansible(ansible_args,
                          os.path.join(args.lib_dir, ANSIBLE_PATH,
                                       'deploy_dependencies.yml'))
        uc_external = False
        if 'external' in net_settings.enabled_network_list:
            uc_external = True
        if args.virtual:
            # create all overcloud VMs
            build_vms(inventory, net_settings, args.deploy_dir)
        else:
            # Attach interfaces to jumphost for baremetal deployment
            jump_networks = ['admin']
            if uc_external:
                jump_networks.append('external')
            for network in jump_networks:
                if network == 'external':
                    # TODO(trozet): enable vlan secondary external networks
                    iface = net_settings['networks'][network][0][
                        'installer_vm']['members'][0]
                else:
                    iface = net_settings['networks'][network]['installer_vm'][
                        'members'][0]
                bridge = "br-{}".format(network)
                jumphost.attach_interface_to_ovs(bridge, iface, network)
        instackenv_json = os.path.join(APEX_TEMP_DIR, 'instackenv.json')
        with open(instackenv_json, 'w') as fh:
            json.dump(inventory, fh)

        # Create and configure undercloud
        if args.debug:
            root_pw = constants.DEBUG_OVERCLOUD_PW
        else:
            root_pw = None

        upstream = (os_version != constants.DEFAULT_OS_VERSION or
                    args.upstream)
        if os_version == 'master':
            branch = 'master'
        else:
            branch = "stable/{}".format(os_version)
        if upstream:
            logging.info("Deploying with upstream artifacts for OpenStack "
                         "{}".format(os_version))
            args.image_dir = os.path.join(args.image_dir, os_version)
            upstream_url = constants.UPSTREAM_RDO.replace(
                constants.DEFAULT_OS_VERSION, os_version)
            upstream_targets = ['overcloud-full.tar', 'undercloud.qcow2']
            utils.fetch_upstream_and_unpack(args.image_dir, upstream_url,
                                            upstream_targets)
            sdn_image = os.path.join(args.image_dir, 'overcloud-full.qcow2')
            if ds_opts['sdn_controller'] == 'opendaylight':
                logging.info("Preparing upstream image with OpenDaylight")
                oc_builder.inject_opendaylight(
                    odl_version=ds_opts['odl_version'],
                    image=sdn_image,
                    tmp_dir=APEX_TEMP_DIR
                )
            # copy undercloud so we don't taint upstream fetch
            uc_image = os.path.join(args.image_dir, 'undercloud_mod.qcow2')
            uc_fetch_img = os.path.join(args.image_dir, 'undercloud.qcow2')
            shutil.copyfile(uc_fetch_img, uc_image)
            # prep undercloud with required packages
            uc_builder.add_upstream_packages(uc_image)
            # add patches from upstream to undercloud and overcloud
            logging.info('Adding patches to undercloud')
            patches = deploy_settings['global_params']['patches']
            c_builder.add_upstream_patches(patches['undercloud'], uc_image,
                                           APEX_TEMP_DIR, branch)
            logging.info('Adding patches to overcloud')
            c_builder.add_upstream_patches(patches['overcloud'], sdn_image,
                                           APEX_TEMP_DIR, branch)
        else:
            sdn_image = os.path.join(args.image_dir, SDN_IMAGE)
            uc_image = 'undercloud.qcow2'
        undercloud = uc_lib.Undercloud(args.image_dir,
                                       args.deploy_dir,
                                       root_pw=root_pw,
                                       external_network=uc_external,
                                       image_name=os.path.basename(uc_image))
        undercloud.start()

        # Generate nic templates
        for role in 'compute', 'controller':
            oc_cfg.create_nic_template(net_settings, deploy_settings, role,
                                       args.deploy_dir, APEX_TEMP_DIR)
        # Install Undercloud
        undercloud.configure(net_settings, deploy_settings,
                             os.path.join(args.lib_dir, ANSIBLE_PATH,
                                          'configure_undercloud.yml'),
                             APEX_TEMP_DIR)

        # Prepare overcloud-full.qcow2
        logging.info("Preparing Overcloud for deployment...")
        if os_version != 'ocata':
            net_data_file = os.path.join(APEX_TEMP_DIR, 'network_data.yaml')
            net_data = network_data.create_network_data(net_settings,
                                                        net_data_file)
        else:
            net_data = False
        if upstream and args.env_file == 'opnfv-environment.yaml':
            # Override the env_file if it is defaulted to opnfv
            # opnfv env file will not work with upstream
            args.env_file = 'upstream-environment.yaml'
        opnfv_env = os.path.join(args.deploy_dir, args.env_file)
        if not upstream:
            oc_deploy.prep_env(deploy_settings, net_settings, inventory,
                               opnfv_env, net_env_target, APEX_TEMP_DIR)
            oc_deploy.prep_image(deploy_settings, sdn_image, APEX_TEMP_DIR,
                                 root_pw=root_pw)
        else:
            shutil.copyfile(sdn_image, os.path.join(APEX_TEMP_DIR,
                                                    'overcloud-full.qcow2'))
            shutil.copyfile(
                opnfv_env,
                os.path.join(APEX_TEMP_DIR, os.path.basename(opnfv_env))
            )

        oc_deploy.create_deploy_cmd(deploy_settings, net_settings, inventory,
                                    APEX_TEMP_DIR, args.virtual,
                                    os.path.basename(opnfv_env),
                                    net_data=net_data)
        deploy_playbook = os.path.join(args.lib_dir, ANSIBLE_PATH,
                                       'deploy_overcloud.yml')
        virt_env = 'virtual-environment.yaml'
        bm_env = 'baremetal-environment.yaml'
        for p_env in virt_env, bm_env:
            shutil.copyfile(os.path.join(args.deploy_dir, p_env),
                            os.path.join(APEX_TEMP_DIR, p_env))

        # Start Overcloud Deployment
        logging.info("Executing Overcloud Deployment...")
        deploy_vars = dict()
        deploy_vars['virtual'] = args.virtual
        deploy_vars['debug'] = args.debug
        deploy_vars['aarch64'] = platform.machine() == 'aarch64'
        deploy_vars['introspect'] = not (args.virtual or
                                         deploy_vars['aarch64'] or
                                         not introspect)
        deploy_vars['dns_server_args'] = ''
        deploy_vars['apex_temp_dir'] = APEX_TEMP_DIR
        deploy_vars['apex_env_file'] = os.path.basename(opnfv_env)
        deploy_vars['stackrc'] = 'source /home/stack/stackrc'
        deploy_vars['overcloudrc'] = 'source /home/stack/overcloudrc'
        deploy_vars['upstream'] = upstream
        deploy_vars['os_version'] = os_version
        for dns_server in net_settings['dns_servers']:
            deploy_vars['dns_server_args'] += " --dns-nameserver {}".format(
                dns_server)
        try:
            utils.run_ansible(deploy_vars, deploy_playbook, host=undercloud.ip,
                              user='stack', tmp_dir=APEX_TEMP_DIR)
            logging.info("Overcloud deployment complete")
        except Exception:
            logging.error("Deployment Failed.  Please check log")
            raise
        finally:
            os.remove(os.path.join(APEX_TEMP_DIR, 'overcloud-full.qcow2'))

        # Post install
        logging.info("Executing post deploy configuration")
        jumphost.configure_bridges(net_settings)
        nova_output = os.path.join(APEX_TEMP_DIR, 'nova_output')
        deploy_vars['overcloud_nodes'] = parsers.parse_nova_output(
            nova_output)
        deploy_vars['SSH_OPTIONS'] = '-o StrictHostKeyChecking=no -o ' \
                                     'GlobalKnownHostsFile=/dev/null -o ' \
                                     'UserKnownHostsFile=/dev/null -o ' \
                                     'LogLevel=error'
        deploy_vars['external_network_cmds'] = \
            oc_deploy.external_network_cmds(net_settings)
        # TODO(trozet): just parse all ds_opts as deploy vars one time
        deploy_vars['gluon'] = ds_opts['gluon']
        deploy_vars['sdn'] = ds_opts['sdn_controller']
        for dep_option in 'yardstick', 'dovetail', 'vsperf':
            if dep_option in ds_opts:
                deploy_vars[dep_option] = ds_opts[dep_option]
            else:
                deploy_vars[dep_option] = False
        deploy_vars['dataplane'] = ds_opts['dataplane']
        overcloudrc = os.path.join(APEX_TEMP_DIR, 'overcloudrc')
        if ds_opts['congress']:
            deploy_vars['congress_datasources'] = \
                oc_deploy.create_congress_cmds(overcloudrc)
            deploy_vars['congress'] = True
        else:
            deploy_vars['congress'] = False
        deploy_vars['calipso'] = ds_opts.get('calipso', False)
        deploy_vars['calipso_ip'] = net_settings['networks']['admin'][
            'installer_vm']['ip']
        # TODO(trozet): this is probably redundant with getting external
        # network info from undercloud.py
        if 'external' in net_settings.enabled_network_list:
            ext_cidr = net_settings['networks']['external'][0]['cidr']
        else:
            ext_cidr = net_settings['networks']['admin']['cidr']
        deploy_vars['external_cidr'] = str(ext_cidr)
        if ext_cidr.version == 6:
            deploy_vars['external_network_ipv6'] = True
        else:
            deploy_vars['external_network_ipv6'] = False
        post_undercloud = os.path.join(args.lib_dir, ANSIBLE_PATH,
                                       'post_deploy_undercloud.yml')
        logging.info("Executing post deploy configuration undercloud playbook")
        try:
            utils.run_ansible(deploy_vars, post_undercloud, host=undercloud.ip,
                              user='stack', tmp_dir=APEX_TEMP_DIR)
            logging.info("Post Deploy Undercloud Configuration Complete")
        except Exception:
            logging.error("Post Deploy Undercloud Configuration failed.  "
                          "Please check log")
            raise
        # Post deploy overcloud node configuration
        # TODO(trozet): just parse all ds_opts as deploy vars one time
        deploy_vars['sfc'] = ds_opts['sfc']
        deploy_vars['vpn'] = ds_opts['vpn']
        deploy_vars['l2gw'] = ds_opts.get('l2gw')
        # TODO(trozet): pull all logs and store in tmp dir in overcloud
        # playbook
        post_overcloud = os.path.join(args.lib_dir, ANSIBLE_PATH,
                                      'post_deploy_overcloud.yml')
        # Run per overcloud node
        for node, ip in deploy_vars['overcloud_nodes'].items():
            logging.info("Executing Post deploy overcloud playbook on "
                         "node {}".format(node))
            try:
                utils.run_ansible(deploy_vars, post_overcloud, host=ip,
                                  user='heat-admin', tmp_dir=APEX_TEMP_DIR)
                logging.info("Post Deploy Overcloud Configuration Complete "
                             "for node {}".format(node))
            except Exception:
                logging.error("Post Deploy Overcloud Configuration failed "
                              "for node {}. Please check log".format(node))
                raise
        logging.info("Apex deployment complete")
        logging.info("Undercloud IP: {}, please connect by doing "
                     "'opnfv-util undercloud'".format(undercloud.ip))
        # TODO(trozet): add logging here showing controller VIP and horizon url


if __name__ == '__main__':
    main()