Frode Nordahl
3ec64703ed
Allow launching an instance and attaching it directly to the external provider network. This is useful in its own right and is also a requirement in order to successfully test some configurations.
193 lines
6.8 KiB
Python
193 lines
6.8 KiB
Python
#!/usr/bin/env python3
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# Copyright 2018 Canonical Ltd.
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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"""Encapsulate nova testing."""
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import subprocess
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import logging
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import time
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import zaza.openstack.utilities.openstack as openstack_utils
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import zaza.openstack.charm_tests.nova.utils as nova_utils
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import zaza.openstack.utilities.exceptions as openstack_exceptions
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from tenacity import (
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RetryError,
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Retrying,
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stop_after_attempt,
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wait_exponential,
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)
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boot_tests = {
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'cirros': {
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'image_name': 'cirros',
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'flavor_name': 'm1.tiny',
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'username': 'cirros',
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'bootstring': 'gocubsgo',
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'password': 'gocubsgo'},
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'bionic': {
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'image_name': 'bionic',
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'flavor_name': 'm1.small',
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'username': 'ubuntu',
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'bootstring': 'finished at'},
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'focal': {
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'image_name': 'focal',
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'flavor_name': 'm1.small',
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'username': 'ubuntu',
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'bootstring': 'finished at'}}
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def launch_instance(instance_key, use_boot_volume=False, vm_name=None,
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private_network_name=None, image_name=None,
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flavor_name=None, external_network_name=None, meta=None,
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userdata=None, attach_to_external_network=False):
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"""Launch an instance.
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:param instance_key: Key to collect associated config data with.
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:type instance_key: str
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:param use_boot_volume: Whether to boot guest from a shared volume.
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:type use_boot_volume: boolean
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:param vm_name: Name to give guest.
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:type vm_name: str
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:param private_network_name: Name of private network to attach guest to.
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:type private_network_name: str
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:param image_name: Image name to use with guest.
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:type image_name: str
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:param flavor_name: Flavor name to use with guest.
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:type flavor_name: str
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:param external_network_name: External network to create floating ip from
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for guest.
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:type external_network_name: str
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:param meta: A dict of arbitrary key/value metadata to store for this
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server. Both keys and values must be <=255 characters.
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:type meta: dict
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:param userdata: Configuration to use upon launch, used by cloud-init.
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:type userdata: str
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:param attach_to_external_network: Attach instance directly to external
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network.
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:type attach_to_external_network: bool
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:returns: the created instance
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:rtype: novaclient.Server
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"""
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keystone_session = openstack_utils.get_overcloud_keystone_session()
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nova_client = openstack_utils.get_nova_session_client(keystone_session)
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neutron_client = openstack_utils.get_neutron_session_client(
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keystone_session)
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# Collect resource information.
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vm_name = vm_name or time.strftime("%Y%m%d%H%M%S")
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image_name = image_name or boot_tests[instance_key]['image_name']
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image = nova_client.glance.find_image(image_name)
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flavor_name = flavor_name or boot_tests[instance_key]['flavor_name']
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flavor = nova_client.flavors.find(name=flavor_name)
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private_network_name = private_network_name or "private"
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meta = meta or {}
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external_network_name = external_network_name or "ext_net"
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if attach_to_external_network:
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instance_network_name = external_network_name
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else:
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instance_network_name = private_network_name
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net = neutron_client.find_resource("network", instance_network_name)
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nics = [{'net-id': net.get('id')}]
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if use_boot_volume:
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bdmv2 = [{
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'boot_index': '0',
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'uuid': image.id,
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'source_type': 'image',
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'volume_size': flavor.disk,
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'destination_type': 'volume',
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'delete_on_termination': True}]
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image = None
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else:
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bdmv2 = None
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# Launch instance.
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logging.info('Launching instance {}'.format(vm_name))
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instance = nova_client.servers.create(
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name=vm_name,
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image=image,
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block_device_mapping_v2=bdmv2,
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flavor=flavor,
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key_name=nova_utils.KEYPAIR_NAME,
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meta=meta,
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nics=nics,
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userdata=userdata)
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# Test Instance is ready.
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logging.info('Checking instance is active')
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openstack_utils.resource_reaches_status(
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nova_client.servers,
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instance.id,
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expected_status='ACTIVE',
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# NOTE(lourot): in some models this may sometimes take more than 15
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# minutes. See lp:1945991
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wait_iteration_max_time=120,
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stop_after_attempt=16)
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logging.info('Checking cloud init is complete')
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openstack_utils.cloud_init_complete(
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nova_client,
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instance.id,
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boot_tests[instance_key]['bootstring'])
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port = openstack_utils.get_ports_from_device_id(
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neutron_client,
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instance.id)[0]
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if attach_to_external_network:
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logging.info('attach_to_external_network={}, not assigning floating IP'
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.format(attach_to_external_network))
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ip = port['fixed_ips'][0]['ip_address']
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logging.info('Using fixed IP {} on network {} for {}'
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.format(ip, instance_network_name, vm_name))
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else:
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logging.info('Assigning floating ip.')
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ip = openstack_utils.create_floating_ip(
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neutron_client,
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external_network_name,
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port=port)['floating_ip_address']
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logging.info('Assigned floating IP {} to {}'.format(ip, vm_name))
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try:
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for attempt in Retrying(
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stop=stop_after_attempt(8),
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wait=wait_exponential(multiplier=1, min=2, max=60)):
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with attempt:
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try:
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openstack_utils.ping_response(ip)
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except subprocess.CalledProcessError as e:
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logging.error('Pinging {} failed with {}'
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.format(ip, e.returncode))
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logging.error('stdout: {}'.format(e.stdout))
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logging.error('stderr: {}'.format(e.stderr))
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raise
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except RetryError:
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raise openstack_exceptions.NovaGuestNoPingResponse()
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# Check ssh'ing to instance.
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logging.info('Testing ssh access.')
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openstack_utils.ssh_test(
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username=boot_tests[instance_key]['username'],
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ip=ip,
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vm_name=vm_name,
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password=boot_tests[instance_key].get('password'),
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privkey=openstack_utils.get_private_key(nova_utils.KEYPAIR_NAME))
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return instance
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