apex/undercloud/undercloud.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 libvirt
  11 import logging
  12 import os
  13 import platform
  14 import shutil
  15 import subprocess
  16 import time
  17
  18 from apex.virtual import virtual_utils as virt_utils
  19 from apex.virtual import configure_vm as vm_lib
  20 from apex.common import constants
  21 from apex.common import utils
  22
  23
  24 class ApexUndercloudException(Exception):
  25     pass
  26
  27
  28 class Undercloud:
  29     """
  30     This class represents an Apex Undercloud VM
  31     """
  32     def __init__(self, image_path, template_path,
  33                  root_pw=None, external_network=False):
  34         self.ip = None
  35         self.root_pw = root_pw
  36         self.external_net = external_network
  37         self.volume = os.path.join(constants.LIBVIRT_VOLUME_PATH,
  38                                    'undercloud.qcow2')
  39         self.image_path = image_path
  40         self.template_path = template_path
  41         self.vm = None
  42         if Undercloud._get_vm():
  43             logging.error("Undercloud VM already exists.  Please clean "
  44                           "before creating")
  45             raise ApexUndercloudException("Undercloud VM already exists!")
  46         self.create()
  47
  48     @staticmethod
  49     def _get_vm():
  50         conn = libvirt.open('qemu:///system')
  51         try:
  52             vm = conn.lookupByName('undercloud')
  53             return vm
  54         except libvirt.libvirtError:
  55             logging.debug("No undercloud VM exists")
  56
  57     def create(self):
  58         networks = ['admin']
  59         if self.external_net:
  60             networks.append('external')
  61         self.vm = vm_lib.create_vm(name='undercloud',
  62                                    image=self.volume,
  63                                    baremetal_interfaces=networks,
  64                                    direct_boot='overcloud-full',
  65                                    kernel_args=['console=ttyS0',
  66                                                 'root=/dev/sda'],
  67                                    default_network=True,
  68                                    template_dir=self.template_path)
  69         self.setup_volumes()
  70         self.inject_auth()
  71
  72     def _set_ip(self):
  73         ip_out = self.vm.interfaceAddresses(
  74             libvirt.VIR_DOMAIN_INTERFACE_ADDRESSES_SRC_LEASE, 0)
  75         if ip_out:
  76             for (name, val) in ip_out.items():
  77                 for ipaddr in val['addrs']:
  78                     if ipaddr['type'] == libvirt.VIR_IP_ADDR_TYPE_IPV4:
  79                         self.ip = ipaddr['addr']
  80                         return True
  81
  82     def start(self):
  83         """
  84         Start Undercloud VM
  85         :return: None
  86         """
  87         if self.vm.isActive():
  88             logging.info("Undercloud already started")
  89         else:
  90             logging.info("Starting undercloud")
  91             self.vm.create()
  92             # give 10 seconds to come up
  93             time.sleep(10)
  94         # set IP
  95         for x in range(5):
  96             if self._set_ip():
  97                 logging.info("Undercloud started.  IP Address: {}".format(
  98                     self.ip))
  99                 break
 100             logging.debug("Did not find undercloud IP in {} "
 101                           "attempts...".format(x))
 102             time.sleep(10)
 103         else:
 104             logging.error("Cannot find IP for Undercloud")
 105             raise ApexUndercloudException(
 106                 "Unable to find IP for undercloud.  Check if VM booted "
 107                 "correctly")
 108
 109     def configure(self, net_settings, playbook, apex_temp_dir):
 110         """
 111         Configures undercloud VM
 112         :param net_setings: Network settings for deployment
 113         :param playbook: playbook to use to configure undercloud
 114         :param apex_temp_dir: temporary apex directory to hold configs/logs
 115         :return: None
 116         """
 117
 118         logging.info("Configuring Undercloud...")
 119         # run ansible
 120         ansible_vars = Undercloud.generate_config(net_settings)
 121         ansible_vars['apex_temp_dir'] = apex_temp_dir
 122         try:
 123             utils.run_ansible(ansible_vars, playbook, host=self.ip,
 124                               user='stack')
 125         except subprocess.CalledProcessError:
 126             logging.error(
 127                 "Failed to install undercloud..."
 128                 "please check log: {}".format(os.path.join(
 129                     apex_temp_dir, 'apex-undercloud-install.log')))
 130             raise ApexUndercloudException('Failed to install undercloud')
 131         logging.info("Undercloud installed!")
 132
 133     def setup_volumes(self):
 134         for img_file in ('overcloud-full.vmlinuz', 'overcloud-full.initrd',
 135                          'undercloud.qcow2'):
 136             src_img = os.path.join(self.image_path, img_file)
 137             dest_img = os.path.join(constants.LIBVIRT_VOLUME_PATH, img_file)
 138             if not os.path.isfile(src_img):
 139                 raise ApexUndercloudException(
 140                     "Required source file does not exist:{}".format(src_img))
 141             if os.path.exists(dest_img):
 142                 os.remove(dest_img)
 143             shutil.copyfile(src_img, dest_img)
 144
 145         # TODO(trozet):check if resize needed right now size is 50gb
 146         # there is a lib called vminspect which has some dependencies and is
 147         # not yet available in pip.  Consider switching to this lib later.
 148         # execute ansible playbook
 149
 150     def inject_auth(self):
 151         virt_ops = list()
 152         # virt-customize keys/pws
 153         if self.root_pw:
 154             pw_op = "password:{}".format(self.root_pw)
 155             virt_ops.append({constants.VIRT_PW: pw_op})
 156         # ssh key setup
 157         virt_ops.append({constants.VIRT_RUN_CMD:
 158                         'mkdir -p /root/.ssh'})
 159         virt_ops.append({constants.VIRT_UPLOAD:
 160                          '/root/.ssh/id_rsa.pub:/root/.ssh/authorized_keys'})
 161         run_cmds = [
 162             'chmod 600 /root/.ssh/authorized_keys',
 163             'restorecon /root/.ssh/authorized_keys',
 164             'cp /root/.ssh/authorized_keys /home/stack/.ssh/',
 165             'chown stack:stack /home/stack/.ssh/authorized_keys',
 166             'chmod 600 /home/stack/.ssh/authorized_keys'
 167         ]
 168         for cmd in run_cmds:
 169             virt_ops.append({constants.VIRT_RUN_CMD: cmd})
 170         virt_utils.virt_customize(virt_ops, self.volume)
 171
 172     @staticmethod
 173     def generate_config(ns):
 174         """
 175         Generates a dictionary of settings for configuring undercloud
 176         :param ns: network settings to derive undercloud settings
 177         :return: dictionary of settings
 178         """
 179
 180         ns_admin = ns['networks']['admin']
 181         intro_range = ns['apex']['networks']['admin']['introspection_range']
 182         config = dict()
 183         config['undercloud_config'] = [
 184             "enable_ui false",
 185             "undercloud_update_packages false",
 186             "undercloud_debug false",
 187             "undercloud_hostname undercloud.{}".format(ns['dns-domain']),
 188             "local_ip {}/{}".format(str(ns_admin['installer_vm']['ip']),
 189                                     str(ns_admin['cidr']).split('/')[1]),
 190             "network_gateway {}".format(str(ns_admin['installer_vm']['ip'])),
 191             "network_cidr {}".format(str(ns_admin['cidr'])),
 192             "dhcp_start {}".format(str(ns_admin['dhcp_range'][0])),
 193             "dhcp_end {}".format(str(ns_admin['dhcp_range'][1])),
 194             "inspection_iprange {}".format(','.join(intro_range))
 195         ]
 196
 197         config['ironic_config'] = [
 198             "disk_utils iscsi_verify_attempts 30",
 199             "disk_partitioner check_device_max_retries 40"
 200         ]
 201
 202         config['nova_config'] = [
 203             "dns_domain {}".format(ns['dns-domain']),
 204             "dhcp_domain {}".format(ns['dns-domain'])
 205         ]
 206
 207         config['neutron_config'] = [
 208             "dns_domain {}".format(ns['dns-domain']),
 209         ]
 210         # FIXME(trozet): possible bug here with not using external network
 211         ns_external = ns['networks']['external'][0]
 212         config['external_network'] = {
 213             "vlan": ns_external['installer_vm']['vlan'],
 214             "ip": ns_external['installer_vm']['ip'],
 215             "prefix": str(ns_external['cidr']).split('/')[1],
 216             "enabled": ns_external['enabled']
 217         }
 218
 219         # Check if this is an ARM deployment
 220         config['aarch64'] = platform.machine() == 'aarch64'
 221
 222         return config