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Move Ceph cluster health reporting to plugin 

Also removes several outputs from the normal keepalive that were
superfluous/static so that the main output fits on one line.
This commit is contained in:
Joshua Boniface 2023-02-13 12:13:56 -05:00
parent 3c742a827b
commit 2ee52e44d3
2 changed files with 133 additions and 50 deletions
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126
node-daemon/plugins/ceph Normal file
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@ -0,0 +1,126 @@
#!/usr/bin/env python3
# ceph.py - PVC Monitoring example plugin for ceph status
# Part of the Parallel Virtual Cluster (PVC) system
#
# Copyright (C) 2018-2022 Joshua M. Boniface <joshua@boniface.me>
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, version 3.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <https://www.gnu.org/licenses/>.
#
###############################################################################
# This script provides an example of a PVC monitoring plugin script. It will create
# a simple plugin to check the Ceph cluster health for anomalies, and return a health
# delta reflective of the overall Ceph status (HEALTH_WARN = 10, HEALTH_ERR = 50).
# This script can thus be used as an example or reference implementation of a
# PVC monitoring pluginscript and expanded upon as required.
# A monitoring plugin script must implement the class "MonitoringPluginScript" which
# extends "MonitoringPlugin", providing the 3 functions indicated. Detailed explanation
# of the role of each function is provided in context of the example; see the other
# examples for more potential uses.
# WARNING:
#
# This script will run in the context of the node daemon keepalives as root.
# DO NOT install untrusted, unvetted plugins under any circumstances.
# This import is always required here, as MonitoringPlugin is used by the
# MonitoringPluginScript class
from pvcnoded.objects.MonitoringInstance import MonitoringPlugin
# A monitoring plugin script must always expose its nice name, which must be identical to
# the file name
PLUGIN_NAME = "ceph"
# The MonitoringPluginScript class must be named as such, and extend MonitoringPlugin.
class MonitoringPluginScript(MonitoringPlugin):
def setup(self):
"""
setup(): Perform special setup steps during node daemon startup
This step is optional and should be used sparingly.
"""
pass
def run(self):
"""
run(): Perform the check actions and return a PluginResult object
"""
# Run any imports first
from rados import Rados
from json import loads, dumps
# Connect to the Ceph cluster
try:
ceph_conn = Rados(
conffile=self.config["ceph_config_file"],
conf=dict(keyring=self.config["ceph_admin_keyring"]),
)
ceph_conn.connect(timeout=1)
except Exception as e:
self.log(f"Failed to connect to Ceph cluster: {e}", state="e")
return self.plugin_result
# Get the Ceph cluster health
try:
health_status = loads(
ceph_conn.mon_command(dumps({"prefix": "health", "format": "json"}), b"", timeout=1)[1]
)
ceph_health = health_status["status"]
except Exception as e:
self.log(f"Failed to get health data from Ceph cluster: {e}", state="e")
return self.plugin_result
finally:
ceph_conn.shutdown()
# Get a list of error entries in the health status output
error_entries = health_status["checks"].keys()
# Set the health delta based on the errors presented
if ceph_health == "HEALTH_ERR":
health_delta = 50
message = f"Ceph cluster in ERROR state: {', '.join(error_entries)}"
elif ceph_health == "HEALTH_WARN":
health_delta = 10
message = f"Ceph cluster in WARNING state: {', '.join(error_entries)}"
else:
health_delta = 0
message = "Ceph cluster in OK state"
# Set the health delta in our local PluginResult object
self.plugin_result.set_health_delta(health_delta)
# Set the message in our local PluginResult object
self.plugin_result.set_message(message)
# Set the detailed data in our local PluginResult object
self.plugin_result.set_data(dumps(health_status))
# Return our local PluginResult object
return self.plugin_result
def cleanup(self):
"""
cleanup(): Perform special cleanup steps during node daemon termination
This step is optional and should be used sparingly.
"""
pass

57
node-daemon/pvcnoded/util/keepalive.py
View File

@ -97,29 +97,6 @@ def collect_ceph_stats(logger, config, zkhandler, this_node, queue):
logger.out("Failed to open connection to Ceph cluster: {}".format(e), state="e")
return
if debug:
logger.out("Getting health stats from monitor", state="d", prefix="ceph-thread")
# Get Ceph cluster health for local status output
command = {"prefix": "health", "format": "json"}
try:
health_status = json.loads(
ceph_conn.mon_command(json.dumps(command), b"", timeout=1)[1]
)
ceph_health = health_status["status"]
except Exception as e:
logger.out("Failed to obtain Ceph health data: {}".format(e), state="e")
ceph_health = "HEALTH_UNKN"
if ceph_health in ["HEALTH_OK"]:
ceph_health_colour = logger.fmt_green
elif ceph_health in ["HEALTH_UNKN"]:
ceph_health_colour = logger.fmt_cyan
elif ceph_health in ["HEALTH_WARN"]:
ceph_health_colour = logger.fmt_yellow
else:
ceph_health_colour = logger.fmt_red
# Primary-only functions
if this_node.router_state == "primary":
if debug:
@ -408,8 +385,6 @@ def collect_ceph_stats(logger, config, zkhandler, this_node, queue):
ceph_conn.shutdown()
queue.put(ceph_health_colour)
queue.put(ceph_health)
queue.put(osds_this_node)
if debug:
@ -777,16 +752,14 @@ def node_keepalive(logger, config, zkhandler, this_node, monitoring_instance):
if config["enable_storage"]:
try:
ceph_health_colour = ceph_thread_queue.get(
timeout=config["keepalive_interval"]
osds_this_node = ceph_thread_queue.get(
timeout=(config["keepalive_interval"] - 1)
)
ceph_health = ceph_thread_queue.get(timeout=config["keepalive_interval"])
osds_this_node = ceph_thread_queue.get(timeout=config["keepalive_interval"])
except Exception:
logger.out("Ceph stats queue get exceeded timeout, continuing", state="w")
ceph_health_colour = logger.fmt_cyan
ceph_health = "UNKNOWN"
osds_this_node = "?"
else:
osds_this_node = "0"
# Set our information in zookeeper
keepalive_time = int(time.time())
@ -839,8 +812,8 @@ def node_keepalive(logger, config, zkhandler, this_node, monitoring_instance):
if config["log_keepalive_cluster_details"]:
logger.out(
"{bold}Maintenance:{nofmt} {maint} "
"{bold}Active VMs:{nofmt} {domcount} "
"{bold}Networks:{nofmt} {netcount} "
"{bold}Node VMs:{nofmt} {domcount} "
"{bold}Node OSDs:{nofmt} {osdcount} "
"{bold}Load:{nofmt} {load} "
"{bold}Memory [MiB]: VMs:{nofmt} {allocmem} "
"{bold}Used:{nofmt} {usedmem} "
@ -849,7 +822,7 @@ def node_keepalive(logger, config, zkhandler, this_node, monitoring_instance):
nofmt=logger.fmt_end,
maint=this_node.maintenance,
domcount=this_node.domains_count,
netcount=len(zkhandler.children("base.network")),
osdcount=osds_this_node,
load=this_node.cpuload,
freemem=this_node.memfree,
usedmem=this_node.memused,
@ -857,22 +830,6 @@ def node_keepalive(logger, config, zkhandler, this_node, monitoring_instance):
),
state="t",
)
if config["enable_storage"] and config["log_keepalive_storage_details"]:
logger.out(
"{bold}Ceph cluster status:{nofmt} {health_colour}{health}{nofmt} "
"{bold}Total OSDs:{nofmt} {total_osds} "
"{bold}Node OSDs:{nofmt} {node_osds} "
"{bold}Pools:{nofmt} {total_pools} ".format(
bold=logger.fmt_bold,
health_colour=ceph_health_colour,
nofmt=logger.fmt_end,
health=ceph_health,
total_osds=len(zkhandler.children("base.osd")),
node_osds=osds_this_node,
total_pools=len(zkhandler.children("base.pool")),
),
state="t",
)
# Look for dead nodes and fence them
if not this_node.maintenance: