def __init__(self, agent_id, node, scheduler_config):
"""Constructor
:param agent_id: The Mesos agent ID for the node
:type agent_id: string
:param node: The node model
:type node: :class:`node.models.Node`
:param scheduler_config: The scheduler configuration
:type scheduler_config: :class:`scheduler.configuration.SchedulerConfiguration`
"""
self._hostname = str(node.hostname) # Never changes
self._id = node.id # Never changes
self._agent_id = agent_id
self._cleanup = NodeCleanup()
self._cleanup_task = None
self._conditions = NodeConditions(self._hostname)
self._health_task = None
self._is_active = node.is_active
self._is_image_pulled = False
self._is_initial_cleanup_completed = False
self._is_online = True
self._is_paused = node.is_paused
self._is_scheduler_paused = scheduler_config.is_paused
self._last_health_task = None
self._last_offer_received = node.last_offer_received
self._lock = threading.Lock()
self._pull_task = None
self._state = None
self._update_state()
def _reset_node(self):
"""Resets the node if it goes away so initial cleanup and the Scale image pull occur when the node comes back.
Caller must have obtained the node's thread lock.
"""
self._cleanup = NodeCleanup()
self._cleanup_task = None
self._health_task = None
self._is_image_pulled = False
self._is_initial_cleanup_completed = False
self._last_health_task = None
self._pull_task = None