def get_nodes_with_metrics(gs):
"""Gets the list of all nodes in the current cluster with their metrics.
Args:
gs: global state.
Returns:
list of wrapped node objects.
Each element in the list is the result of
utilities.wrap_object(node, 'Node', ...)
Raises:
CollectorError in case of failure to fetch data from Kubernetes.
Other exceptions may be raised due to exectution errors.
"""
nodes_list = get_nodes(gs)
for node in nodes_list:
assert utilities.is_wrapped_object(node, 'Node')
project_id = utilities.node_id_to_project_id(node['id'])
# The project_id may be '_unknown_'. This is not a big
# deal, since the aggregator knows the project ID.
metrics.annotate_node(project_id, node)
return nodes_list
def get_nodes_with_metrics(gs):
"""Gets the list of all nodes in the current cluster with their metrics.
Args:
gs: global state.
Returns:
list of wrapped node objects.
Each element in the list is the result of
utilities.wrap_object(node, 'Node', ...)
Raises:
CollectorError in case of failure to fetch data from Kubernetes.
Other exceptions may be raised due to exectution errors.
"""
nodes_list = get_nodes(gs)
for node in nodes_list:
assert utilities.is_wrapped_object(node, 'Node')
project_id = utilities.node_id_to_project_id(node['id'])
# The project_id may be '_unknown_'. This is not a big
# deal, since the aggregator knows the project ID.
metrics.annotate_node(project_id, node)
return nodes_list
def _do_compute_other_nodes(gs, cluster_guid, nodes_list, oldest_timestamp, g):
"""Adds nodes not in the node list but running pods to the graph.
This handles the case when there are pods running on the master node,
in which case we add a dummy node representing the master to the graph.
The nodes list does not include the master.
Args:
gs: the global state.
cluster_guid: the cluster's ID.
nodes_list: a list of wrapped Node objects.
oldest_timestamp: the timestamp of the oldest Node object.
g: the context graph under construction.
"""
assert isinstance(gs, global_state.GlobalState)
assert utilities.valid_string(cluster_guid)
assert isinstance(nodes_list, list)
assert utilities.valid_string(oldest_timestamp)
assert isinstance(g, ContextGraph)
# Compute the set of known Node names.
known_node_ids = set()
for node in nodes_list:
assert utilities.is_wrapped_object(node, 'Node')
known_node_ids.add(node['id'])
# Compute the set of Nodes referenced by pods but not in the known set.
# The set of unknown node names may be empty.
missing_node_ids = set()
for pod in kubernetes.get_pods(gs):
assert utilities.is_wrapped_object(pod, 'Pod')
# pod.properties.spec.nodeName may be missing if the pod is waiting.
parent_node_id = utilities.get_attribute(
pod, ['properties', 'spec', 'nodeName'])
if not utilities.valid_string(parent_node_id):
continue
if parent_node_id in known_node_ids:
continue
# Found a pod that does not belong to any of the known nodes.
missing_node_ids.add(parent_node_id)
# Process the missing nodes.
for node_id in missing_node_ids:
# Create a dummy node object just as a placeholder for metric
# annotations.
node = utilities.wrap_object({}, 'Node', node_id, time.time())
metrics.annotate_node(node)
node_guid = 'Node:' + node_id
g.add_resource(node_guid, node['annotations'], 'Node', oldest_timestamp, {})
g.add_relation(cluster_guid, node_guid, 'contains') # Cluster contains Node
def get_nodes_with_metrics(gs):
"""Gets the list of all nodes in the current cluster with their metrics.
Args:
gs: global state.
Returns:
list of wrapped node objects.
Each element in the list is the result of
utilities.wrap_object(node, 'Node', ...)
Raises:
CollectorError in case of failure to fetch data from Kubernetes.
Other exceptions may be raised due to exectution errors.
"""
nodes_list = get_nodes(gs)
for node in nodes_list:
metrics.annotate_node(node)
return nodes_list
def get_nodes_with_metrics(gs):
"""Gets the list of all nodes in the current cluster with their metrics.
Args:
gs: global state.
Returns:
list of wrapped node objects.
Each element in the list is the result of
utilities.wrap_object(node, 'Node', ...)
Raises:
CollectorError in case of failure to fetch data from Kubernetes.
Other exceptions may be raised due to exectution errors.
"""
nodes_list = get_nodes(gs)
for node in nodes_list:
metrics.annotate_node(node)
return nodes_list
def _do_compute_master_pods(gs, cluster_guid, nodes_list, oldest_timestamp, g):
"""Adds pods running on the master node to the graph.
These pods do not have a valid parent node, because the nodes list
does not include the master node.
This routine adds a dummy master node, and then adds the pods running
on the master node to the graph. It does not add information about
containers, processes, or images of these nodes, because there is no
minion collector running on the master node.
Note that in some configurations (for example, GKE), there is no
master node.
Args:
gs: the global state.
cluster_guid: the cluster's ID.
nodes_list: a list of wrapped Node objects.
oldest_timestamp: the timestamp of the oldest Node object.
g: the context graph under construction.
"""
assert isinstance(gs, global_state.GlobalState)
assert utilities.valid_string(cluster_guid)
assert isinstance(nodes_list, types.ListType)
assert utilities.valid_string(oldest_timestamp)
assert isinstance(g, ContextGraph)
# Compute the set of known Node names.
known_node_ids = set()
project_id = '_unknown_'
for node in nodes_list:
assert utilities.is_wrapped_object(node, 'Node')
known_node_ids.add(node['id'])
project_id = utilities.node_id_to_project_id(node['id'])
# Compute the set of Nodes referenced by pods but not in the known set.
# The set of unknown node names may be empty.
assert utilities.valid_string(project_id)
missing_node_ids = set()
for pod in kubernetes.get_pods(gs):
assert utilities.is_wrapped_object(pod, 'Pod')
# pod.properties.spec.nodeName may be missing if the pod is waiting.
parent_node_id = utilities.get_attribute(
pod, ['properties', 'spec', 'nodeName'])
if not utilities.valid_string(parent_node_id):
continue
if parent_node_id in known_node_ids:
continue
# Found a pod that does not belong to any of the known nodes.
missing_node_ids.add(parent_node_id)
# Process the pods in each of the missing nodes.
for node_id in missing_node_ids:
# Create a dummy node object just as a placeholder for metric
# annotations.
node = utilities.wrap_object(
{}, 'Node', node_id, time.time(),
label=utilities.node_id_to_host_name(node_id))
# The project_id may be '_unknown_'. This is not a big
# deal, since the aggregator knows the project ID.
metrics.annotate_node(project_id, node)
node_guid = 'Node:' + node_id
g.add_resource(node_guid, node['annotations'], 'Node', oldest_timestamp, {})
g.add_relation(cluster_guid, node_guid, 'contains') # Cluster contains Node
for pod in kubernetes.get_pods(gs, node_id):
_do_compute_pod(gs, cluster_guid, node_guid, pod, g)
