[integration tests] Instance OS-EXT-SRV-ATTR:host is None some test cases

[Georgy Dyuldin]

Test result:

https://mirantis.testrail.com/index.php?/tests/view/6100461

Trace:

instances = [<Server: server00>, <Server: server01>]
os_conn = <mos_tests.environment.os_actions.OpenStackActions object at 0x7f87d929d890>
env = <mos_tests.environment.fuel_client.Environment object at 0x7f87d92278d0>
keypair = <Keypair: instancekey>
nova_client = <mos_tests.functions.os_cli.Nova object at 0x7f87d9220a10>

    @pytest.mark.check_env_('has_2_or_more_computes')
    @pytest.mark.testrail_id('842499')
    def test_live_evacuate_instances(instances, os_conn, env, keypair,
                                     nova_client):
        """Live evacuate all instances of the specified host to other available
        hosts without shared storage

        Scenario:
            1. Create net01, net01__subnet
            2. Boot instances vm1 and vm2 in net01 on compute node1
            3. Run the 'nova host-evacuate-live' command to live-migrate
                vm1 and vm2 instances from compute node1 to compute node2:
                nova host-evacuate-live --target-host node-2.domain.tld \
                --block-migrate node-1.domain.tld
            4. Check that all live-migrated instances are hosted on target host
                and are in ACTIVE status
            5. Check pings between vm1 and vm2
        """
        old_host = getattr(instances[0], 'OS-EXT-SRV-ATTR:host')
        new_host = [x.hypervisor_hostname
                    for x in os_conn.nova.hypervisors.list()
                    if x.hypervisor_hostname != old_host][0]

        nova_client(
            'host-evacuate-live',
            params='--target-host {new_host} --block-migrate {old_host}'.format(
                old_host=old_host,
> new_host=new_host))

mos_tests/nova/host_actions_test.py:56:
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
mos_tests/functions/os_cli.py:64: in __call__
    merge_stderr=merge_stderr)
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _

remote = <mos_tests.environment.ssh.SSHClient object at 0x7f87d9246cd0> [10.109.2.3:22]
command = '. openrc && nova host-evacuate-live --target-host node-2.test.domain.local --block-migrate None'
fail_ok = False, merge_stderr = False

    def os_execute(remote, command, fail_ok=False, merge_stderr=False):
        command = '. openrc && {}'.format(command.encode('utf-8'))
        result = remote.execute(command)
        if not fail_ok and not result.is_ok:
            raise exceptions.CommandFailed(result['exit_code'],
                                           command.decode('utf-8'),
                                           result.stdout_string,
> result.stderr_string)
E CommandFailed: Command '. openrc && nova host-evacuate-live --target-host node-2.test.domain.local --block-migrate None' returned non-zero exit status 1.
E stdout:
E
E stderr:
E ERROR (NotFound): No hypervisor matching 'None' could be found. (HTTP 404) (Request-ID: req-4362c552-496d-43d2-9281-5b315093813c)

mos_tests/functions/os_cli.py:42: CommandFailed

[Georgy Dyuldin (g-dyuldin)]

Commit to fix it:

https://review.gerrithub.io/#/c/277349/