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Add node health to fault states 

Adjusts ordering and ensures that node health states are included in
faults if they are less than 50%.

Also adjusts fault ID generation and runs fault checks only coordinator
nodes to avoid too many runs.
This commit is contained in:
Joshua Boniface 2023-12-01 15:50:11 -05:00
parent 8594eb697f
commit 9c2b1b29ee
2 changed files with 88 additions and 36 deletions
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8
daemon-common/zkhandler.py
View File

@ -328,19 +328,19 @@ class ZKHandler(object):
return True
def children(self, key, retval=None):
def children(self, key):
"""
Lists all children of a key
"""
try:
path = self.get_schema_path(key)
if path is None:
# This path is invalid; this is likely due to missing schema entries, so return None
return retval
raise NoNodeError
return self.zk_conn.get_children(path)
except NoNodeError:
return retval
# This path is invalid; this is likely due to missing schema entries, so return None
return None
def rename(self, kkpairs):
"""

116
health-daemon/pvchealthd/objects/MonitoringInstance.py
View File

@ -25,7 +25,7 @@ import importlib.util
from os import walk
from datetime import datetime
from hashlib import sha1
from hashlib import md5
from json import dumps, loads
from apscheduler.schedulers.background import BackgroundScheduler
@ -199,6 +199,33 @@ class MonitoringInstance(object):
self.this_node = this_node
# Create functions for each fault type
def get_node_health_states():
node_entries = list()
for node in self.zkhandler.children("base.node"):
node_health = self.zkhandler.read(("node.monitoring.health", node))
node_faulty_plugins = list()
all_plugins = self.zkhandler.children(("node.monitoring.data", node))
for plugin in all_plugins:
plugin_delta = self.zkhandler.read(
(
"node.monitoring.data",
node,
"monitoring_plugin.health_delta",
plugin,
)
)
if int(plugin_delta) > 0:
node_faulty_plugins.append(f"{plugin}@-{plugin_delta}%")
node_entries.append(
(
f"{node} was at {node_health}% ({', '.join(node_faulty_plugins)})",
node_health,
)
)
return node_entries
def get_node_daemon_states():
return [
(node, self.zkhandler.read(("node.state.daemon", node)))
@ -256,30 +283,36 @@ class MonitoringInstance(object):
]
# This is a list of all possible faults (cluster error messages) and their corresponding details
self.faults_map = {
self.cluster_faults_map = {
"unhealthy_node": {
"entries": get_node_health_states,
"conditions": range(50, 0, -1),
"delta": 0,
"message": "Node {entry} <= 50% health",
},
"dead_or_fenced_node": {
"entries": get_node_daemon_states,
"conditions": ["dead", "fenced"],
"delta": 50,
"message": "Node {entry} was dead and/or fenced.",
"message": "Node {entry} was dead and/or fenced",
},
"ceph_osd_out": {
"entries": get_osd_out_states,
"conditions": ["1"],
"delta": 25,
"message": "OSD {entry} was out.",
"message": "OSD {entry} was marked out",
},
"ceph_err": {
"entries": get_ceph_health_entries,
"conditions": ["HEALTH_ERR"],
"delta": 50,
"message": "Ceph cluster reported ERR: {entry}",
"message": "HEALTH_ERR {entry} reported by Ceph",
},
"vm_failed": {
"entries": get_vm_states,
"conditions": ["fail"],
"delta": 10,
"message": "VM {entry} was failed.",
"message": "VM {entry} was failed",
},
"memory_overprovisioned": {
"entries": get_overprovisioned_memory,
@ -462,8 +495,7 @@ class MonitoringInstance(object):
)
self.timer.start()
self.run_faults()
self.run_plugins()
self.run_checks()
def stop_timer(self):
try:
@ -472,23 +504,25 @@ class MonitoringInstance(object):
except Exception:
self.logger.out("Failed to stop monitoring check timer", state="w")
def generate_fault(self, fault_time, fault_delta, fault_message):
def generate_fault(self, fault_name, fault_time, fault_delta, fault_message):
# Generate a fault ID from the fault_message and fault_delta
fault_str = f"{fault_delta} {fault_message}"
fault_id = int(sha1(fault_str.encode("utf-8")).hexdigest(), 16) % (10**8)
self.logger.out(
f"Generating fault {fault_id}: {fault_message} @ {fault_time}", state="i"
)
fault_str = f"{fault_name} {fault_delta} {fault_message}"
fault_id = str(md5(fault_str.encode("utf-8")).hexdigest())
# If a fault already exists with this ID, just update the time
if not self.zkhandler.exists("base.faults"):
self.logger.out(
"Skipping fault reporting due to missing Zookeeper schemas", state="w"
"Skipping fault reporting for {fault_id} due to missing Zookeeper schemas",
state="w",
)
return
if fault_id in self.zkhandler.children("base.faults", retval=[]):
existing_faults = self.zkhandler.children("base.faults")
if fault_id in existing_faults:
self.logger.out(
f"Updating fault {fault_id}: {fault_message} @ {fault_time}", state="i"
)
self.zkhandler.write(
[
(("faults.last_time", fault_id), str(fault_time)),
@ -496,6 +530,10 @@ class MonitoringInstance(object):
)
# Otherwise, generate a new fault event
else:
self.logger.out(
f"Generating fault {fault_id}: {fault_message} @ {fault_time}",
state="i",
)
self.zkhandler.write(
[
(("faults.id", fault_id), ""),
@ -509,14 +547,17 @@ class MonitoringInstance(object):
)
def run_faults(self):
if self.this_node.coordinator_state == "primary":
coordinator_state = self.this_node.coordinator_state
if coordinator_state == "primary":
cst_colour = self.logger.fmt_green
elif self.this_node.coordinator_state == "secondary":
elif coordinator_state == "secondary":
cst_colour = self.logger.fmt_blue
else:
cst_colour = self.logger.fmt_cyan
active_coordinator_state = self.this_node.coordinator_state
if coordinator_state not in ["primary", "secondary", "takeover", "relinquish"]:
return
runtime_start = datetime.now()
self.logger.out(
@ -525,20 +566,22 @@ class MonitoringInstance(object):
)
fault_count = 0
for fault_type in self.faults_map.keys():
fault_details = self.faults_map[fault_type]
for fault_type in self.cluster_faults_map.keys():
fault_details = self.cluster_faults_map[fault_type]
entries = fault_details["entries"]()
for _entry in entries:
entry = _entry[0]
detail = _entry[1]
check = _entry[1]
for condition in fault_details["conditions"]:
if str(condition) in str(detail):
if str(condition) == str(check):
fault_time = datetime.now()
fault_delta = fault_details["delta"]
fault_message = fault_details["message"].format(entry=entry)
fault_count += 1
self.generate_fault(fault_time, fault_delta, fault_message)
self.generate_fault(
fault_type, fault_time, fault_delta, fault_message
)
runtime_end = datetime.now()
runtime_delta = runtime_end - runtime_start
@ -556,7 +599,7 @@ class MonitoringInstance(object):
nofmt=self.logger.fmt_end,
hostname=self.config["node_hostname"],
starttime=runtime_start,
costate=active_coordinator_state,
costate=coordinator_state,
fault_count=fault_count,
runtime=runtime,
),
@ -582,15 +625,15 @@ class MonitoringInstance(object):
return result
def run_plugins(self):
if self.this_node.coordinator_state == "primary":
coordinator_state = self.this_node.coordinator_state
if coordinator_state == "primary":
cst_colour = self.logger.fmt_green
elif self.this_node.coordinator_state == "secondary":
elif coordinator_state == "secondary":
cst_colour = self.logger.fmt_blue
else:
cst_colour = self.logger.fmt_cyan
active_coordinator_state = self.this_node.coordinator_state
runtime_start = datetime.now()
self.logger.out(
"Starting monitoring plugin check run",
@ -614,6 +657,15 @@ class MonitoringInstance(object):
state="t",
prefix=f"{result.plugin_name} ({result.runtime}s)",
)
# Leaving this code if we ever want plugins to directly generate faults
# if result.health_delta >= 25:
# fault_type = f"plugin.{self.this_node.name}.{result.plugin_name}"
# fault_time = datetime.now()
# fault_delta = result.health_delta
# fault_message = (
# f"{self.this_node.name} {result.plugin_name} {result.message}"
# )
# self.generate_fault(fault_type, fault_time, fault_delta, fault_message)
total_health -= result.health_delta
if total_health < 0:
@ -653,7 +705,7 @@ class MonitoringInstance(object):
nofmt=self.logger.fmt_end,
hostname=self.config["node_hostname"],
starttime=runtime_start,
costate=active_coordinator_state,
costate=coordinator_state,
health=health_text,
runtime=runtime,
),
@ -683,5 +735,5 @@ class MonitoringInstance(object):
)
def run_checks(self):
self.run_faults()
self.run_plugins()
self.run_faults()