def test_get_draining_hosts(
mock_get_hosts_with_state,
):
get_draining_hosts()
assert mock_get_hosts_with_state.call_count == 1
expected_args = mock.call(state='draining_machines')
assert mock_get_hosts_with_state.call_args == expected_args
def get_tasks_by_state_for_app(app, drain_method, service, nerve_ns,
bounce_health_params, system_paasta_config):
tasks_by_state = {
'happy': set(),
'unhappy': set(),
'draining': set(),
'at_risk': set(),
}
happy_tasks = bounce_lib.get_happy_tasks(app, service, nerve_ns,
system_paasta_config,
**bounce_health_params)
draining_hosts = get_draining_hosts()
for task in app.tasks:
if drain_method.is_draining(task):
state = 'draining'
elif task in happy_tasks:
if task.host in draining_hosts:
state = 'at_risk'
else:
state = 'happy'
else:
state = 'unhappy'
tasks_by_state[state].add(task)
return tasks_by_state
def get_num_at_risk_tasks(app):
"""Determine how many of an application's tasks are running on
at-risk (Mesos Maintenance Draining) hosts.
:param app: A marathon application
:returns: An integer representing the number of tasks running on at-risk hosts
"""
hosts_tasks_running_on = [task.host for task in app.tasks]
draining_hosts = get_draining_hosts()
num_at_risk_tasks = 0
for host in hosts_tasks_running_on:
if host in draining_hosts:
num_at_risk_tasks += 1
log.debug("%s has %d tasks running on at-risk hosts." % (app.id, num_at_risk_tasks))
return num_at_risk_tasks
def get_tasks_by_state_for_app(app, drain_method, service, nerve_ns, bounce_health_params,
system_paasta_config):
tasks_by_state = {
'happy': set(),
'unhappy': set(),
'draining': set(),
'at_risk': set(),
}
happy_tasks = bounce_lib.get_happy_tasks(app, service, nerve_ns, system_paasta_config, **bounce_health_params)
draining_hosts = get_draining_hosts()
for task in app.tasks:
if drain_method.is_draining(task):
state = 'draining'
elif task in happy_tasks:
if task.host in draining_hosts:
state = 'at_risk'
else:
state = 'happy'
else:
state = 'unhappy'
tasks_by_state[state].add(task)
return tasks_by_state
def test_get_draining_hosts(mock_get_hosts_with_state, ):
get_draining_hosts()
assert mock_get_hosts_with_state.call_count == 1
expected_args = mock.call(state='draining_machines')
assert mock_get_hosts_with_state.call_args == expected_args