def run_migration_with_file_transfer(test, params, env):
"""
KVM migration test:
1) Get a live VM and clone it.
2) Verify that the source VM supports migration. If it does, proceed with
the test.
3) Reboot the VM
4) Send a migration command to the source VM and wait until it's finished.
5) Kill off the source VM.
6) Log into the destination VM after the migration is finished.
@param test: kvm test object.
@param params: Dictionary with test parameters.
@param env: Dictionary with the test environment.
"""
def transfer_test(vm, host_path, guest_path, timeout=120):
"""
vm.copy_files_to does not raise exception, so we need a wrapper
in order to make it to be used by BackgroundTest.
"""
if not vm.copy_files_to(host_path, guest_path, timeout=timeout):
raise error.TestError("Fail to do the file transfer!")
vm = kvm_test_utils.get_living_vm(env, params.get("main_vm"))
timeout = int(params.get("login_timeout", 360))
session = kvm_test_utils.wait_for_login(vm, timeout=timeout)
mig_timeout = float(params.get("mig_timeout", "3600"))
mig_protocol = params.get("migration_protocol", "tcp")
guest_path = params.get("guest_path", "/tmp")
file_size = params.get("file_size", "1000")
transfer_timeout = int(params.get("transfer_timeout", "240"))
bg = None
try:
utils.run("dd if=/dev/zero of=/tmp/file bs=1M count=%s" % file_size)
# Transfer file from host to guest
bg = kvm_test_utils.BackgroundTest(transfer_test,
(vm, "/tmp/file", guest_path,
transfer_timeout))
bg.start()
while bg.is_alive():
logging.info("File transfer is not ended, start a round of migration ...")
# Migrate the VM
dest_vm = kvm_test_utils.migrate(vm, env, mig_timeout, mig_protocol, False)
vm = dest_vm
finally:
if bg: bg.join()
session.close()
utils.run("rm -rf /tmp/zero")
def run_migration_with_reboot(test, params, env):
"""
KVM migration test:
1) Get a live VM and clone it.
2) Verify that the source VM supports migration. If it does, proceed with
the test.
3) Reboot the VM
4) Send a migration command to the source VM and wait until it's finished.
5) Kill off the source VM.
6) Log into the destination VM after the migration is finished.
@param test: kvm test object.
@param params: Dictionary with test parameters.
@param env: Dictionary with the test environment.
"""
vm = kvm_test_utils.get_living_vm(env, params.get("main_vm"))
timeout = int(params.get("login_timeout", 360))
session = kvm_test_utils.wait_for_login(vm, timeout=timeout)
mig_timeout = float(params.get("mig_timeout", "3600"))
mig_protocol = params.get("migration_protocol", "tcp")
mig_cancel = bool(params.get("mig_cancel"))
bg = None
try:
# reboot the VM in background
bg = kvm_test_utils.BackgroundTest(kvm_test_utils.reboot, (vm, session))
bg.start()
while bg.is_alive():
# Migrate the VM
dest_vm = kvm_test_utils.migrate(vm, env, mig_timeout, mig_protocol,
False)
vm = dest_vm
finally:
if bg:
bg.join()
session.close()
def run_migration_multi_host(test, params, env):
"""
KVM multi-host migration test:
Migration execution progress:
source host dest host
----------------------------------------------------------------------------
log into guest
----------------------------------------------------------------------------
start socket server
wait 30 secs -------------------- wait login_timeout+30 secs ---------------
accept connection connect to socket server,send mig_port
----------------------------------------------------------------------------
start migration
wait 30 secs -------------------- wait mig_timeout+30 secs -----------------
try to log into migrated guest check VM's status via monitor cmd
----------------------------------------------------------------------------
@param test: kvm test object.
@param params: Dictionary with test parameters.
@param env: Dictionary with the test environment.
"""
def guest_active(vm):
o = vm.monitor.info("status")
if isinstance(o, str):
return "status: running" in o
else:
return o.get("status") == "running"
vm = kvm_test_utils.get_living_vm(env, params.get("main_vm"))
login_timeout = int(params.get("login_timeout", 360))
role = params.get("role")
srchost = params.get("srchost")
dsthost = params.get("dsthost")
mig_timeout = int(params.get("mig_timeout"))
# Port used to communicate info between source and destination
comm_port = int(params.get("comm_port", 12324))
regain_ip_cmd = params.get("regain_ip_cmd", "dhclient")
if role == 'source':
session = kvm_test_utils.wait_for_login(vm, timeout=login_timeout)
# Listen on a port to get the migration port received from
# dest machine
s_socket = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
s_socket.bind(('', comm_port))
s_socket.listen(1)
# Wait 30 seconds for source and dest to reach this point
test.job.barrier(srchost,'socket_started', 30).rendezvous(srchost,
dsthost)
c_socket, addr = s_socket.accept()
mig_port = int(c_socket.recv(6))
logging.info("Received from destination the migration port %s",
mig_port)
c_socket.close()
logging.info("Start migrating now...")
kvm_test_utils.migrate(vm=vm, dest_host=dsthost, mig_port=mig_port,
env=env)
# Wait up to 30 seconds for dest to reach this point
test.job.barrier(srchost, 'mig_finished', 30).rendezvous(srchost,
dsthost)
elif role == 'destination':
# Wait up to login_timeout + 30 seconds for the source to
# reach this point
test.job.barrier(dsthost, 'socket_started',
login_timeout + 30).rendezvous(srchost,
dsthost)
c_socket = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
c_socket.connect((srchost, comm_port))
logging.info("Communicating to source migration port %s",
vm.migration_port)
c_socket.send("%d" % vm.migration_port)
c_socket.close()
# Wait up to mig_timeout + 30 seconds for the source to
# reach this point: migration finished
test.job.barrier(dsthost, 'mig_finished',
mig_timeout + 30).rendezvous(srchost,
dsthost)
if not guest_active(vm):
raise error.TestFail("Guest not active after migration")
logging.info("Migrated guest appears to be running")
# Log into the guest again
logging.info("Logging into migrated guest after migration...")
session_serial = kvm_test_utils.wait_for_login(vm, timeout=login_timeout, serial=True)
session_serial.cmd(regain_ip_cmd)
session = kvm_test_utils.wait_for_login(vm, timeout=login_timeout)
else:
raise error.TestError('Invalid role specified')
def run_timedrift_with_migration(test, params, env):
"""
Time drift test with migration:
1) Log into a guest.
2) Take a time reading from the guest and host.
3) Migrate the guest.
4) Take a second time reading.
5) If the drift (in seconds) is higher than a user specified value, fail.
@param test: KVM test object.
@param params: Dictionary with test parameters.
@param env: Dictionary with the test environment.
"""
vm = kvm_test_utils.get_living_vm(env, params.get("main_vm"))
timeout = int(params.get("login_timeout", 360))
session = kvm_test_utils.wait_for_login(vm, timeout=timeout)
# Collect test parameters:
# Command to run to get the current time
time_command = params.get("time_command")
# Filter which should match a string to be passed to time.strptime()
time_filter_re = params.get("time_filter_re")
# Time format for time.strptime()
time_format = params.get("time_format")
drift_threshold = float(params.get("drift_threshold", "10"))
drift_threshold_single = float(params.get("drift_threshold_single", "3"))
migration_iterations = int(params.get("migration_iterations", 1))
try:
# Get initial time
# (ht stands for host time, gt stands for guest time)
(ht0, gt0) = kvm_test_utils.get_time(session, time_command,
time_filter_re, time_format)
# Migrate
for i in range(migration_iterations):
# Get time before current iteration
(ht0_, gt0_) = kvm_test_utils.get_time(session, time_command,
time_filter_re, time_format)
session.close()
# Run current iteration
logging.info("Migrating: iteration %d of %d..." %
(i + 1, migration_iterations))
vm = kvm_test_utils.migrate(vm, env)
# Log in
logging.info("Logging in after migration...")
session = kvm_utils.wait_for(vm.remote_login, 30, 0, 2)
if not session:
raise error.TestFail("Could not log in after migration")
logging.info("Logged in after migration")
# Get time after current iteration
(ht1_, gt1_) = kvm_test_utils.get_time(session, time_command,
time_filter_re, time_format)
# Report iteration results
host_delta = ht1_ - ht0_
guest_delta = gt1_ - gt0_
drift = abs(host_delta - guest_delta)
logging.info("Host duration (iteration %d): %.2f" %
(i + 1, host_delta))
logging.info("Guest duration (iteration %d): %.2f" %
(i + 1, guest_delta))
logging.info("Drift at iteration %d: %.2f seconds" %
(i + 1, drift))
# Fail if necessary
if drift > drift_threshold_single:
raise error.TestFail("Time drift too large at iteration %d: "
"%.2f seconds" % (i + 1, drift))
# Get final time
(ht1, gt1) = kvm_test_utils.get_time(session, time_command,
time_filter_re, time_format)
finally:
if session:
session.close()
# Report results
host_delta = ht1 - ht0
guest_delta = gt1 - gt0
drift = abs(host_delta - guest_delta)
logging.info("Host duration (%d migrations): %.2f" %
(migration_iterations, host_delta))
logging.info("Guest duration (%d migrations): %.2f" %
(migration_iterations, guest_delta))
logging.info("Drift after %d migrations: %.2f seconds" %
(migration_iterations, drift))
# Fail if necessary
if drift > drift_threshold:
raise error.TestFail("Time drift too large after %d migrations: "
"%.2f seconds" % (migration_iterations, drift))
