def _health_all_ping(self) -> Health:
"""Health check that tries to ping all of the hosts."""
ping_health = Health(source=self._instance_id)
ping = self.ping()
try:
ping_task_result_hosts = ping["plays"][0]["tasks"][0]["hosts"]
stats_hosts = ping["stats"]
except KeyError:
ping_health.error("ansible ping gave unexpected results.")
else:
for host, host_stats in stats_hosts.items():
if host_stats["ok"]:
ping_health.healthy(f"Ansible: {host} ping response ok.")
elif host_stats["unreachable"]:
ping_health.warning(f"Ansible: {host} unreachable during ping.")
elif host_stats["ignored"]:
ping_health.warning(f"Ansible: {host} ping ignored.")
elif host_stats["failures"]:
ping_health.error(f"Ansible: {host} ping failed.")
elif host_stats["unknowwn"]:
ping_health.error(f"Ansible: {host} ping skipped.")
else:
ping_health.warning(
f"Ansible: {host} status not understood: {ping_task_result_hosts[host]}."
)
return ping_health
def _health_k8s_alldaemonset_health(self) -> Health:
"""Check if kubernetes thinks all the daemonsets are healthy."""
health = Health(source=self._instance_id)
apps_v1_api: api.apps_v1_api.AppsV1Api = self.get_api("AppsV1Api")
unhealthy_dae_count = 0
# pylint: disable=no-member
for daemonset in apps_v1_api.list_daemon_set_for_all_namespaces().items:
namespace = daemonset.metadata.namespace
name = daemonset.metadata.name
status = daemonset.status
if status.collision_count is not None and status.collision_count > 0:
health.warning(
f"Daemonset: [{namespace}/{name}] collision_count "
"-> Reports some collisions: "
f"{status.collision_count}"
)
unhealthy_dae_count += 1
if status.number_unavailable is not None and status.number_unavailable > 0:
health.warning(
f"Daemonset: [{namespace}/{name}] number_unavailable "
"-> Reports some unavailable pods: "
f"{status.number_unavailable}"
)
unhealthy_dae_count += 1
if status.desired_number_scheduled < status.current_number_scheduled:
health.warning(
f"Daemonset: [{namespace}/{name}] desired_number_scheduled "
"-> Does not have the desired number scheduled: "
f"{status.desired_number_scheduled} < "
f"{status.current_number_scheduled}"
)
unhealthy_dae_count += 1
if status.conditions:
for condition in status.conditions:
if condition.status == "True":
health.healthy(
f"Daemonset: [{namespace}/{name}] {condition.type} "
f"-> {condition.message}"
)
else:
health.warning(
f"Daemonset: [{namespace}/{name}] {condition.type} "
f"-> {condition.message}"
)
unhealthy_dae_count += 1
if unhealthy_dae_count == 0:
health.healthy("KubeAPI: all daemonsets report as healthy")
elif unhealthy_dae_count < 3:
health.warning("KubeAPI: some daemonsets report condition failures")
else:
health.error("KubeAPI: Kubernetes Reports cluster is unhealthy (daemonset health)")
return health
def _health_k8s_allstatefulset_health(self) -> Health:
"""Check if kubernetes thinks all the statefulsets are healthy."""
health = Health(source=self._instance_id)
apps_v1_api: api.apps_v1_api.AppsV1Api = self.get_api("AppsV1Api")
unhealthy_count = 0
# pylint: disable=no-member
for statefulset in apps_v1_api.list_stateful_set_for_all_namespaces().items:
namespace = statefulset.metadata.namespace
name = statefulset.metadata.name
status = statefulset.status
# {'collision_count': 0,
# 'conditions': None,
# 'current_replicas': 1,
# 'current_revision': 'loki-workload-67877b465c',
# 'observed_generation': 1,
# 'ready_replicas': 1,
# 'replicas': 1,
# 'update_revision': 'loki-workload-67877b465c',
# 'updated_replicas': 1}
if status.collision_count is not None and status.collision_count > 0:
health.warning(
f"KubeAPI:Statefulset: [{namespace}/{name}] "
"-> Reports some collisions: "
f"{status.collision_count}"
)
unhealthy_count += 1
if status.conditions:
for condition in status.conditions:
if condition.status == "True":
health.healthy(
f"KubeAPI:Statefulset: [{namespace}/{name}] {condition.type} "
f"-> {condition.message}"
)
else:
health.warning(
f"KubeAPI:Statefulset: [{namespace}/{name}] {condition.type} "
f"-> {condition.message}"
)
unhealthy_count += 1
if unhealthy_count == 0:
health.healthy("KubeAPI: all statefulsets report as healthy")
elif unhealthy_count < 3:
health.warning("KubeAPI: some statefulsets report condition failures")
else:
health.error("KubeAPI: Kubernetes Reports cluster is unhealthy (statefulset health)")
return health
def _health_k8s_livez(self) -> Health:
"""Check if kubernetes thinks the pod is healthy."""
health = Health(source=self._instance_id)
try:
if self.livez():
health.healthy("KubeAPI: livez reports live")
else:
health.warning("KubeAPI: livez reports NOT live.")
# pylint: disable=broad-except
except Exception as err:
health.error(f"Could not retrieve livez: {err}")
return health
def _health_swarm_nodes(self) -> Health:
"""Check if kubernetes thinks the pod is healthy."""
health = Health(source=self._instance_id)
try:
for node in self.nodes.list():
attrs = node.attrs
description = node.attrs["Description"]["Hostname"]
role = node.attrs["Spec"]["Role"]
errors: int = 0
if "Status" in attrs:
node_status = node.attrs["Status"]
message = node_status["Message"]
if node_status["State"] != "ready":
health.error(
f"Docker:Node: {role} {description} : {message}")
errors += 1
if "ManagerStatus" in attrs:
manager_status = node.attrs["ManagerStatus"]
if manager_status["Reachability"] != "reachable":
health.error(
f"Docker:Node: {role} {description} : manager is not reachable"
)
errors += 1
if node.attrs["Spec"]["Availability"] != "active":
health.warning(
f"Docker:Node: {role} {description} : is not available"
)
errors += 1
if errors == 0:
health.healthy(
f"Docker:Node: {role} {description} : reports healthy")
else:
health.warning(
f"Docker:Node: {role} {description} : is not health ({errors} issues.)"
)
# pylint: disable=broad-except
except Exception as err:
health.error(f"Docker: could not retrieve node health: {err}")
return health
def _health_k8s_allpod_health(self) -> Health:
"""Check if kubernetes thinks all the pods are healthy."""
health = Health(source=self._instance_id)
core_v1_api = self.get_api("CoreV1Api")
unhealthy_pod_count = 0
for pod in core_v1_api.list_pod_for_all_namespaces().items:
if pod.status.phase == "Failed":
health.error(f"KubeAPI: pod failed: {pod.metadata.name}")
unhealthy_pod_count += 1
if unhealthy_pod_count == 0:
health.healthy("KubeAPI: all pods report as healthy")
elif unhealthy_pod_count < 2:
health.warning("KubeAPI: some pods report as failed")
else:
health.error("KubeAPI: Kubernetes Reports cluster is unhealthy (pod health)")
return health
def _health_deployment_status(self):
"""Check if kubernetes thinks the deployment is healthy."""
health = Health(source=self._instance_id)
apps_v1 = self._kubeapi_client.get_api("AppsV1Api")
try:
deployment = apps_v1.read_namespaced_deployment(
self.name, self.namespace)
status = deployment.status
if status is None:
health.error(
f"Deployment: [{self.namespace}/{self.name}] retrieved no status."
)
if status.conditions is None:
health.warning(
f"Deployment: [{self.namespace}/{self.name}] retrieved no status conditions."
)
else:
available_condition = next(condition
for condition in status.conditions
if condition.type == "Available")
progressing_condition = next(
condition for condition in status.conditions
if condition.type == "Progressing")
if available_condition and available_condition.status == "True":
health.healthy(
f"Deployment: [{self.namespace}/{self.name}] "
"Deployment is available "
f"-> {available_condition.message}")
elif progressing_condition and progressing_condition.status == "True":
health.warning(
f"Deployment: [{self.namespace}/{self.name}] "
"Deployment is progressing "
f"-> {progressing_condition.message}")
else:
health.error(
f"Deployment: [{self.namespace}/{self.name}] "
"Deployment is neither progressing nor available "
f"-> {available_condition.message} && {progressing_condition.message}"
)
for condition in status.conditions:
if condition.type in ["Available", "Progressing"]:
pass
elif condition.status == "True":
health.healthy(
f"Deployment: [{self.namespace}/{self.name}] {condition.type} "
f"-> {condition.message}")
else:
health.error(
f"Deployment: [{self.namespace}/{self.name}] {condition.type} "
f"-> {condition.message}")
except kubernetes.client.rest.ApiException as err:
health.error(f"Deployment: K8S REST API exception occured: {err}")
return health
def _health_k8s_alldeployment_health(self) -> Health:
"""Check if kubernetes thinks all the deployments are healthy."""
health = Health(source=self._instance_id)
apps_v1_api: api.apps_v1_api.AppsV1Api = self.get_api("AppsV1Api")
unhealthy_dep_count = 0
# pylint: disable=no-member
for deployment in apps_v1_api.list_deployment_for_all_namespaces().items:
namespace = deployment.metadata.namespace
name = deployment.metadata.name
no_issues = True
if not deployment.status.conditions:
health.unknown(
f"KubeAPI:Deployment: [{namespace}/{name}] "
"Deployment does not have any conditions (yet?)"
)
continue
available_condition = next(
(
condition
for condition in deployment.status.conditions
if condition.type == "Available"
),
None,
)
progressing_condition = next(
(
condition
for condition in deployment.status.conditions
if condition.type == "Progressing"
),
None,
)
if available_condition and available_condition.status == "True":
pass
elif progressing_condition and progressing_condition.status == "True":
health.warning(
f"KubeAPI:Deployment: [{namespace}/{name}] "
"Deployment is progressing "
f"-> {progressing_condition.message}"
)
no_issues = False
else:
messages = "\n".join(
list(
condition.message
for condition in [progressing_condition, available_condition]
if condition is not None
)
)
health.warning(
f"KubeAPI:Deployment: [{namespace}/{name}] "
"Deployment is neither progressing nor available "
f"-> {messages}"
)
no_issues = False
for condition in deployment.status.conditions:
if condition.type in ["Available", "Progressing"]:
pass
elif condition.status != "True":
health.warning(
f"KubeAPI:Deployment: [{namespace}/{name}] {condition.type} "
f"-> {condition.message}"
)
no_issues = False
if no_issues:
health.healthy(f"KubeAPI:Deployment: [{namespace}/{name}] is healthy")
else:
health.warning(f"KubeAPI:Deployment: [{namespace}/{name}] is not healthy")
unhealthy_dep_count += 1
if unhealthy_dep_count == 0:
health.healthy("KubeAPI: all deployments report healthy")
elif unhealthy_dep_count < 3:
health.warning("KubeAPI: some deployments report condition failures")
else:
health.error("KubeAPI: Kubernetes Reports cluster is unhealthy (deployment health)")
return health
def _health_k8s_node_health(self) -> Health:
"""Check if kubernetes thinks the nodes are healthy."""
health = Health(source=self._instance_id)
try:
for node in self.nodes():
name = node.metadata.name
no_issues = True
condition = next(
(
condition
for condition in node.status.conditions
if condition.type == "Ready"
),
None,
)
if condition is not None and condition.status != "True":
health.warning(f"KubeAPI: {name}: {condition.message}")
no_issues = False
condition = next(
(
condition
for condition in node.status.conditions
if condition.type == "NetworkUnavailable"
),
None,
)
if condition is not None and condition.status == "True":
health.warning(f"KubeAPI: {name}: {condition.message}")
no_issues = False
condition = next(
(
condition
for condition in node.status.conditions
if condition.type == "MemoryPressure"
),
None,
)
if condition is not None and condition.status == "True":
health.warning(f"KubeAPI: {name}: {condition.message}")
no_issues = False
condition = next(
(
condition
for condition in node.status.conditions
if condition.type == "DiskPressure"
),
None,
)
if condition is not None and condition.status == "True":
health.warning(f"KubeAPI: {name}: {condition.message}")
no_issues = False
condition = next(
(
condition
for condition in node.status.conditions
if condition.type == "PIDPressure"
),
None,
)
if condition is not None and condition.status == "True":
health.warning(f"KubeAPI: {name}: {condition.message}")
no_issues = False
if no_issues:
health.healthy(f"KubeAPI: Node {name} reports healthy.")
else:
health.error(f"KubeAPI: Node {name} reporting issues.")
# pylint: disable=broad-except
except Exception as err:
health.error(f"KubeAPI:Exception occured when check kubelet health: {err}")
return health