apex/virtual/virtual_utils.py

   1 ##############################################################################
   2 # Copyright (c) 2017 Tim Rozet (trozet@redhat.com) and others.
   3 #
   4 # All rights reserved. This program and the accompanying materials
   5 # are made available under the terms of the Apache License, Version 2.0
   6 # which accompanies this distribution, and is available at
   7 # http://www.apache.org/licenses/LICENSE-2.0
   8 ##############################################################################
   9
  10 import copy
  11 import iptc
  12 import logging
  13 import os
  14 import platform
  15 import pprint
  16 import subprocess
  17 import xml.etree.ElementTree as ET
  18
  19 from apex.common import utils
  20 from apex.virtual import configure_vm as vm_lib
  21 from virtualbmc import manager as vbmc_lib
  22
  23 DEFAULT_RAM = 8192
  24 DEFAULT_PM_PORT = 6230
  25 DEFAULT_USER = 'admin'
  26 DEFAULT_PASS = 'password'
  27 DEFAULT_VIRT_IP = '192.168.122.1'
  28
  29
  30 def get_virt_ip():
  31     try:
  32         virsh_net_xml = subprocess.check_output(['virsh', 'net-dumpxml',
  33                                                  'default'],
  34                                                 stderr=subprocess.STDOUT)
  35     except subprocess.CalledProcessError:
  36         logging.warning('Unable to detect default virsh network IP.  Will '
  37                         'use 192.168.122.1')
  38         return DEFAULT_VIRT_IP
  39
  40     tree = ET.fromstring(virsh_net_xml)
  41     ip_tag = tree.find('ip')
  42     if ip_tag:
  43         virsh_ip = ip_tag.get('address')
  44         if virsh_ip:
  45             logging.debug("Detected virsh default network ip: "
  46                           "{}".format(virsh_ip))
  47             return virsh_ip
  48
  49     return DEFAULT_VIRT_IP
  50
  51
  52 def generate_inventory(target_file, ha_enabled=False, num_computes=1,
  53                        controller_ram=DEFAULT_RAM, arch=platform.machine(),
  54                        compute_ram=DEFAULT_RAM, vcpus=4):
  55     """
  56     Generates inventory file for virtual deployments
  57     :param target_file:
  58     :param ha_enabled:
  59     :param num_computes:
  60     :param controller_ram:
  61     :param arch:
  62     :param compute_ram:
  63     :param vcpus:
  64     :return:
  65     """
  66
  67     node = {'mac_address': '',
  68             'ipmi_ip': get_virt_ip(),
  69             'ipmi_user': DEFAULT_USER,
  70             'ipmi_pass': DEFAULT_PASS,
  71             'pm_type': 'pxe_ipmitool',
  72             'pm_port': '',
  73             'cpu': vcpus,
  74             'memory': DEFAULT_RAM,
  75             'disk': 41,
  76             'arch': arch,
  77             'capabilities': ''
  78             }
  79
  80     inv_output = {'nodes': {}}
  81     if ha_enabled:
  82         num_ctrlrs = 3
  83     else:
  84         num_ctrlrs = 1
  85
  86     for idx in range(num_ctrlrs + num_computes):
  87         tmp_node = copy.deepcopy(node)
  88         tmp_node['mac_address'] = vm_lib.generate_baremetal_macs(1)[0]
  89         tmp_node['pm_port'] = DEFAULT_PM_PORT + idx
  90         if idx < num_ctrlrs:
  91             tmp_node['capabilities'] = 'profile:control'
  92             tmp_node['memory'] = controller_ram
  93         else:
  94             tmp_node['capabilities'] = 'profile:compute'
  95             tmp_node['memory'] = compute_ram
  96         inv_output['nodes']['node{}'.format(idx)] = copy.deepcopy(tmp_node)
  97
  98     utils.dump_yaml(inv_output, target_file)
  99
 100     logging.info('Virtual environment file created: {}'.format(target_file))
 101
 102
 103 def host_setup(node):
 104     """
 105     Handles configuring vmbc and firewalld/iptables
 106     :param node: dictionary of domain names and ports for ipmi
 107     :return:
 108     """
 109     vbmc_manager = vbmc_lib.VirtualBMCManager()
 110     for name, port in node.items():
 111         vbmc_manager.add(username=DEFAULT_USER, password=DEFAULT_PASS,
 112                          port=port, address=get_virt_ip(), domain_name=name,
 113                          libvirt_uri='qemu:///system',
 114                          libvirt_sasl_password=False,
 115                          libvirt_sasl_username=False)
 116
 117         # TODO(trozet): add support for firewalld
 118         try:
 119             subprocess.check_call(['systemctl', 'stop', 'firewalld'])
 120             subprocess.check_call(['systemctl', 'restart', 'libvirtd'])
 121         except subprocess.CalledProcessError:
 122             logging.warning('Failed to stop firewalld and restart libvirtd')
 123         # iptables rule
 124         rule = iptc.Rule()
 125         rule.protocol = 'udp'
 126         match = rule.create_match('udp')
 127         match.dport = str(port)
 128         rule.add_match(match)
 129         rule.target = iptc.Target(rule, "ACCEPT")
 130         chain = iptc.Chain(iptc.Table(iptc.Table.FILTER), "INPUT")
 131         chain.insert_rule(rule)
 132         try:
 133             subprocess.check_call(['vbmc', 'start', name])
 134             logging.debug("Started vbmc for domain {}".format(name))
 135         except subprocess.CalledProcessError:
 136             logging.error("Failed to start vbmc for {}".format(name))
 137             raise
 138     logging.debug('vmbcs setup: {}'.format(vbmc_manager.list()))
 139
 140
 141 def virt_customize(ops, target):
 142     """
 143     Helper function to virt customize disks
 144     :param ops: list of of operations and arguments
 145     :param target: target disk to modify
 146     :return: None
 147     """
 148     logging.info("Virt customizing target disk: {}".format(target))
 149     virt_cmd = ['virt-customize']
 150     for op in ops:
 151         for op_cmd, op_arg in op.items():
 152             virt_cmd.append(op_cmd)
 153             virt_cmd.append(op_arg)
 154     virt_cmd.append('-a')
 155     virt_cmd.append(target)
 156     if not os.path.isfile(target):
 157         raise FileNotFoundError
 158     my_env = os.environ.copy()
 159     my_env['LIBGUESTFS_BACKEND'] = 'direct'
 160     logging.debug("Virt-customizing with: \n{}".format(virt_cmd))
 161     try:
 162         logging.debug(subprocess.check_output(virt_cmd, env=my_env,
 163                                               stderr=subprocess.STDOUT))
 164     except subprocess.CalledProcessError as e:
 165         logging.error("Error executing virt-customize: {}".format(
 166                       pprint.pformat(e.output)))
 167         raise