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 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                  image_name='undercloud.qcow2'):
  35         self.ip = None
  36         self.root_pw = root_pw
  37         self.external_net = external_network
  38         self.volume = os.path.join(constants.LIBVIRT_VOLUME_PATH,
  39                                    'undercloud.qcow2')
  40         self.image_path = image_path
  41         self.image_name = image_name
  42         self.template_path = template_path
  43         self.vm = None
  44         if Undercloud._get_vm():
  45             logging.error("Undercloud VM already exists.  Please clean "
  46                           "before creating")
  47             raise ApexUndercloudException("Undercloud VM already exists!")
  48         self.create()
  49
  50     @staticmethod
  51     def _get_vm():
  52         conn = libvirt.open('qemu:///system')
  53         try:
  54             vm = conn.lookupByName('undercloud')
  55             return vm
  56         except libvirt.libvirtError:
  57             logging.debug("No undercloud VM exists")
  58
  59     def create(self):
  60         networks = ['admin']
  61         if self.external_net:
  62             networks.append('external')
  63         console = 'ttyAMA0' if platform.machine() == 'aarch64' else 'ttyS0'
  64
  65         self.vm = vm_lib.create_vm(name='undercloud',
  66                                    image=self.volume,
  67                                    baremetal_interfaces=networks,
  68                                    direct_boot='overcloud-full',
  69                                    kernel_args=['console={}'.format(console),
  70                                                 'root=/dev/sda'],
  71                                    default_network=True,
  72                                    template_dir=self.template_path)
  73         self.setup_volumes()
  74         self.inject_auth()
  75
  76     def _set_ip(self):
  77         ip_out = self.vm.interfaceAddresses(
  78             libvirt.VIR_DOMAIN_INTERFACE_ADDRESSES_SRC_LEASE, 0)
  79         if ip_out:
  80             for (name, val) in ip_out.items():
  81                 for ipaddr in val['addrs']:
  82                     if ipaddr['type'] == libvirt.VIR_IP_ADDR_TYPE_IPV4:
  83                         self.ip = ipaddr['addr']
  84                         return True
  85
  86     def start(self):
  87         """
  88         Start Undercloud VM
  89         :return: None
  90         """
  91         if self.vm.isActive():
  92             logging.info("Undercloud already started")
  93         else:
  94             logging.info("Starting undercloud")
  95             self.vm.create()
  96             # give 10 seconds to come up
  97             time.sleep(10)
  98         # set IP
  99         for x in range(5):
 100             if self._set_ip():
 101                 logging.info("Undercloud started.  IP Address: {}".format(
 102                     self.ip))
 103                 break
 104             logging.debug("Did not find undercloud IP in {} "
 105                           "attempts...".format(x))
 106             time.sleep(10)
 107         else:
 108             logging.error("Cannot find IP for Undercloud")
 109             raise ApexUndercloudException(
 110                 "Unable to find IP for undercloud.  Check if VM booted "
 111                 "correctly")
 112
 113     def configure(self, net_settings, playbook, apex_temp_dir):
 114         """
 115         Configures undercloud VM
 116         :param net_setings: Network settings for deployment
 117         :param playbook: playbook to use to configure undercloud
 118         :param apex_temp_dir: temporary apex directory to hold configs/logs
 119         :return: None
 120         """
 121
 122         logging.info("Configuring Undercloud...")
 123         # run ansible
 124         ansible_vars = Undercloud.generate_config(net_settings)
 125         ansible_vars['apex_temp_dir'] = apex_temp_dir
 126         try:
 127             utils.run_ansible(ansible_vars, playbook, host=self.ip,
 128                               user='stack')
 129         except subprocess.CalledProcessError:
 130             logging.error(
 131                 "Failed to install undercloud..."
 132                 "please check log: {}".format(os.path.join(
 133                     apex_temp_dir, 'apex-undercloud-install.log')))
 134             raise ApexUndercloudException('Failed to install undercloud')
 135         logging.info("Undercloud installed!")
 136
 137     def setup_volumes(self):
 138         for img_file in ('overcloud-full.vmlinuz', 'overcloud-full.initrd',
 139                          self.image_name):
 140             src_img = os.path.join(self.image_path, img_file)
 141             if img_file == self.image_name:
 142                 dest_img = os.path.join(constants.LIBVIRT_VOLUME_PATH,
 143                                         'undercloud.qcow2')
 144             else:
 145                 dest_img = os.path.join(constants.LIBVIRT_VOLUME_PATH,
 146                                         img_file)
 147             if not os.path.isfile(src_img):
 148                 raise ApexUndercloudException(
 149                     "Required source file does not exist:{}".format(src_img))
 150             if os.path.exists(dest_img):
 151                 os.remove(dest_img)
 152             shutil.copyfile(src_img, dest_img)
 153             shutil.chown(dest_img, user='qemu', group='qemu')
 154             os.chmod(dest_img, 0o0744)
 155         # TODO(trozet):check if resize needed right now size is 50gb
 156         # there is a lib called vminspect which has some dependencies and is
 157         # not yet available in pip.  Consider switching to this lib later.
 158
 159     def inject_auth(self):
 160         virt_ops = list()
 161         # virt-customize keys/pws
 162         if self.root_pw:
 163             pw_op = "password:{}".format(self.root_pw)
 164             virt_ops.append({constants.VIRT_PW: pw_op})
 165         # ssh key setup
 166         virt_ops.append({constants.VIRT_RUN_CMD:
 167                         'mkdir -p /root/.ssh'})
 168         virt_ops.append({constants.VIRT_UPLOAD:
 169                          '/root/.ssh/id_rsa.pub:/root/.ssh/authorized_keys'})
 170         run_cmds = [
 171             'chmod 600 /root/.ssh/authorized_keys',
 172             'restorecon /root/.ssh/authorized_keys',
 173             'cp /root/.ssh/authorized_keys /home/stack/.ssh/',
 174             'chown stack:stack /home/stack/.ssh/authorized_keys',
 175             'chmod 600 /home/stack/.ssh/authorized_keys'
 176         ]
 177         for cmd in run_cmds:
 178             virt_ops.append({constants.VIRT_RUN_CMD: cmd})
 179         virt_utils.virt_customize(virt_ops, self.volume)
 180
 181     @staticmethod
 182     def generate_config(ns):
 183         """
 184         Generates a dictionary of settings for configuring undercloud
 185         :param ns: network settings to derive undercloud settings
 186         :return: dictionary of settings
 187         """
 188
 189         ns_admin = ns['networks']['admin']
 190         intro_range = ns['apex']['networks']['admin']['introspection_range']
 191         config = dict()
 192         config['undercloud_config'] = [
 193             "enable_ui false",
 194             "undercloud_update_packages false",
 195             "undercloud_debug false",
 196             "undercloud_hostname undercloud.{}".format(ns['dns-domain']),
 197             "local_ip {}/{}".format(str(ns_admin['installer_vm']['ip']),
 198                                     str(ns_admin['cidr']).split('/')[1]),
 199             "network_gateway {}".format(str(ns_admin['installer_vm']['ip'])),
 200             "network_cidr {}".format(str(ns_admin['cidr'])),
 201             "dhcp_start {}".format(str(ns_admin['dhcp_range'][0])),
 202             "dhcp_end {}".format(str(ns_admin['dhcp_range'][1])),
 203             "inspection_iprange {}".format(','.join(intro_range))
 204         ]
 205
 206         config['ironic_config'] = [
 207             "disk_utils iscsi_verify_attempts 30",
 208             "disk_partitioner check_device_max_retries 40"
 209         ]
 210
 211         config['nova_config'] = [
 212             "dns_domain {}".format(ns['dns-domain']),
 213             "dhcp_domain {}".format(ns['dns-domain'])
 214         ]
 215
 216         config['neutron_config'] = [
 217             "dns_domain {}".format(ns['dns-domain']),
 218         ]
 219         # FIXME(trozet): possible bug here with not using external network
 220         ns_external = ns['networks']['external'][0]
 221         config['external_network'] = {
 222             "vlan": ns_external['installer_vm']['vlan'],
 223             "ip": ns_external['installer_vm']['ip'],
 224             "prefix": str(ns_external['cidr']).split('/')[1],
 225             "enabled": ns_external['enabled']
 226         }
 227
 228         # Check if this is an ARM deployment
 229         config['aarch64'] = platform.machine() == 'aarch64'
 230
 231         return config