207 lines
7.9 KiB
Python
Executable File
207 lines
7.9 KiB
Python
Executable File
#!/usr/bin/env python
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import os
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import sys
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import time
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import inspect
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import logging
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import argparse
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import oslo_config.cfg
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import requests.exceptions
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def is_forced_down(connection, hostname):
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services = connection.services.list(host=hostname, binary="nova-compute")
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for service in services:
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if service.forced_down:
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return True
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return False
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def evacuations_done(connection, hostname):
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# Get a list of migrations.
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# :param host: (optional) filter migrations by host name.
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# :param status: (optional) filter migrations by status.
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# :param cell_name: (optional) filter migrations for a cell.
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#
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migrations = connection.migrations.list(host=hostname)
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print("Checking %d migrations" % len(migrations))
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for migration in migrations:
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# print migration.to_dict()
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#
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# {
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# u'status': u'error',
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# u'dest_host': None,
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# u'new_instance_type_id': 2,
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# u'old_instance_type_id': 2,
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# u'updated_at': u'2018-04-22T20:55:29.000000',
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# u'dest_compute':
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# u'overcloud-novacompute-2.localdomain',
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# u'migration_type': u'live-migration',
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# u'source_node':
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# u'overcloud-novacompute-0.localdomain',
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# u'id': 8,
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# u'created_at': u'2018-04-22T20:52:58.000000',
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# u'instance_uuid':
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# u'd1c82ce8-3dc5-48db-b59f-854b3b984ef1',
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# u'dest_node':
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# u'overcloud-novacompute-2.localdomain',
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# u'source_compute':
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# u'overcloud-novacompute-0.localdomain'
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# }
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# Acceptable: done, completed, failed
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if migration.status in ["running", "accepted", "pre-migrating"]:
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return False
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return True
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def safe_to_start(connection, hostname):
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if is_forced_down(connection, hostname):
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print("Waiting for fence-down flag to be cleared")
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return False
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if not evacuations_done(connection, hostname):
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print("Waiting for evacuations to complete or fail")
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return False
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return True
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def create_nova_connection(options):
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try:
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from novaclient import client
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from novaclient.exceptions import NotAcceptable
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except ImportError:
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print("Nova not found or not accessible")
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sys.exit(1)
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from keystoneauth1 import loading
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from keystoneauth1 import session
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from keystoneclient import discover
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# Prefer the oldest and strip the leading 'v'
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keystone_versions = discover.available_versions(options["auth_url"][0])
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keystone_version = keystone_versions[0]['id'][1:]
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kwargs = dict(
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auth_url=options["auth_url"][0],
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username=options["username"][0],
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password=options["password"][0]
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)
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if discover.version_match("2", keystone_version):
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kwargs["tenant_name"] = options["tenant_name"][0]
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elif discover.version_match("3", keystone_version):
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kwargs["project_name"] = options["project_name"][0]
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kwargs["user_domain_name"] = options["user_domain_name"][0]
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kwargs["project_domain_name"] = options["project_domain_name"][0]
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loader = loading.get_plugin_loader('password')
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keystone_auth = loader.load_from_options(**kwargs)
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keystone_session = session.Session(auth=keystone_auth, verify=(not options["insecure"]))
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nova_endpoint_type = 'internalURL'
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# We default to internalURL but we allow this to be overridden via
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# the [placement]/os_interface key.
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if 'os_interface' in options and len(options["os_interface"]) == 1:
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nova_endpoint_type = options["os_interface"][0]
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# Via https://review.opendev.org/#/c/492247/ os_interface has been deprecated in queens
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# and we need to use 'valid_interfaces' which is a:
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# "List of interfaces, in order of preference, for endpoint URL. (list value)"
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# Since it is not explicitely set in nova.conf we still keep the check for os_interface
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elif 'valid_interfaces' in options and len(options["valid_interfaces"]) >= 1:
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nova_endpoint_type = options["valid_interfaces"][0]
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# This mimicks the code in novaclient/shell.py
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if nova_endpoint_type in ['internal', 'public', 'admin']:
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nova_endpoint_type += 'URL'
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if 'region_name' in options:
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region = options['region_name'][0]
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elif 'os_region_name' in options:
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region = options['os_region_name'][0]
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else: # We actually try to make a client call even with an empty region
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region = None
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nova_versions = [ "2.23", "2" ]
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for version in nova_versions:
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clientargs = inspect.getargspec(client.Client).varargs
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# Some versions of Openstack prior to Ocata only
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# supported positional arguments for username,
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# password, and tenant.
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#
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# Versions since Ocata only support named arguments.
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#
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# So we need to use introspection to figure out how to
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# create a Nova client.
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#
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# Happy days
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#
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if clientargs:
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# OSP < Ocata
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# ArgSpec(args=['version', 'username', 'password', 'project_id', 'auth_url'],
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# varargs=None,
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# keywords='kwargs', defaults=(None, None, None, None))
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nova = client.Client(version,
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None, # User
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None, # Password
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None, # Tenant
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None, # Auth URL
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insecure=options["insecure"],
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region_name=region,
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session=keystone_session, auth=keystone_auth,
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http_log_debug="verbose" in options,
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endpoint_type=nova_endpoint_type)
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else:
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# OSP >= Ocata
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# ArgSpec(args=['version'], varargs='args', keywords='kwargs', defaults=None)
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nova = client.Client(version,
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region_name=region,
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session=keystone_session, auth=keystone_auth,
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http_log_debug="verbose" in options,
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endpoint_type=nova_endpoint_type)
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try:
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nova.hypervisors.list()
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return nova
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except NotAcceptable as e:
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logging.warning(e)
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except Exception as e:
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logging.warning("Nova connection failed. %s: %s" % (e.__class__.__name__, e))
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print("Couldn't obtain a supported connection to nova, tried: %s\n" % repr(nova_versions))
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return None
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parser = argparse.ArgumentParser(description='Process some integers.')
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parser.add_argument('--config-file', dest='nova_config', action='store',
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default="/etc/nova/nova.conf",
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help='path to nova configuration (default: /etc/nova/nova.conf)')
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parser.add_argument('--nova-binary', dest='nova_binary', action='store',
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default="/usr/bin/nova-compute",
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help='path to nova compute binary (default: /usr/bin/nova-compute)')
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parser.add_argument('--enable-file', dest='enable_file', action='store',
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default="/var/lib/nova/instanceha/enabled",
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help='file exists if instance HA is enabled on this host '\
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'(default: /var/lib/nova/instanceha/enabled)')
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sections = {}
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(args, remaining) = parser.parse_known_args(sys.argv)
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config = oslo_config.cfg.ConfigParser(args.nova_config, sections)
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config.parse()
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config.sections["placement"]["insecure"] = 0
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config.sections["placement"]["verbose"] = 1
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if os.path.isfile(args.enable_file):
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connection = None
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while not connection:
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# Loop in case the control plane is recovering when we run
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connection = create_nova_connection(config.sections["placement"])
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if not connection:
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time.sleep(10)
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while not safe_to_start(connection, config.sections["DEFAULT"]["host"][0]):
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time.sleep(10)
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real_args = [args.nova_binary, '--config-file', args.nova_config]
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real_args.extend(remaining[1:])
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os.execv(args.nova_binary, real_args)
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