306 lines
10 KiB
Python
306 lines
10 KiB
Python
#!/usr/bin/env python3
|
|
|
|
# node.py - PVC client function library, node management
|
|
# 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/>.
|
|
#
|
|
###############################################################################
|
|
|
|
import time
|
|
import re
|
|
import json
|
|
|
|
import daemon_lib.common as common
|
|
|
|
|
|
def getNodeInformation(zkhandler, node_name):
|
|
"""
|
|
Gather information about a node from the Zookeeper database and return a dict() containing it.
|
|
"""
|
|
node_daemon_state = zkhandler.read(("node.state.daemon", node_name))
|
|
node_coordinator_state = zkhandler.read(("node.state.router", node_name))
|
|
node_domain_state = zkhandler.read(("node.state.domain", node_name))
|
|
node_static_data = zkhandler.read(("node.data.static", node_name)).split()
|
|
node_pvc_version = zkhandler.read(("node.data.pvc_version", node_name))
|
|
node_cpu_count = int(node_static_data[0])
|
|
node_kernel = node_static_data[1]
|
|
node_os = node_static_data[2]
|
|
node_arch = node_static_data[3]
|
|
node_vcpu_allocated = int(zkhandler.read(("node.vcpu.allocated", node_name)))
|
|
node_mem_total = int(zkhandler.read(("node.memory.total", node_name)))
|
|
node_mem_allocated = int(zkhandler.read(("node.memory.allocated", node_name)))
|
|
node_mem_provisioned = int(zkhandler.read(("node.memory.provisioned", node_name)))
|
|
node_mem_used = int(zkhandler.read(("node.memory.used", node_name)))
|
|
node_mem_free = int(zkhandler.read(("node.memory.free", node_name)))
|
|
node_load = float(zkhandler.read(("node.cpu.load", node_name)))
|
|
node_domains_count = int(
|
|
zkhandler.read(("node.count.provisioned_domains", node_name))
|
|
)
|
|
node_running_domains = zkhandler.read(("node.running_domains", node_name)).split()
|
|
try:
|
|
node_health = int(zkhandler.read(("node.monitoring.health", node_name)))
|
|
except Exception:
|
|
node_health = "N/A"
|
|
try:
|
|
node_health_plugins = zkhandler.read(
|
|
("node.monitoring.plugins", node_name)
|
|
).split()
|
|
except Exception:
|
|
node_health_plugins = list()
|
|
|
|
node_health_details = list()
|
|
for plugin in node_health_plugins:
|
|
plugin_last_run = zkhandler.read(
|
|
("node.monitoring.data", node_name, "monitoring_plugin.last_run", plugin)
|
|
)
|
|
plugin_health_delta = zkhandler.read(
|
|
(
|
|
"node.monitoring.data",
|
|
node_name,
|
|
"monitoring_plugin.health_delta",
|
|
plugin,
|
|
)
|
|
)
|
|
plugin_message = zkhandler.read(
|
|
("node.monitoring.data", node_name, "monitoring_plugin.message", plugin)
|
|
)
|
|
plugin_data = zkhandler.read(
|
|
("node.monitoring.data", node_name, "monitoring_plugin.data", plugin)
|
|
)
|
|
plugin_output = {
|
|
"name": plugin,
|
|
"last_run": int(plugin_last_run),
|
|
"health_delta": int(plugin_health_delta),
|
|
"message": plugin_message,
|
|
"data": json.loads(plugin_data),
|
|
}
|
|
node_health_details.append(plugin_output)
|
|
|
|
# Construct a data structure to represent the data
|
|
node_information = {
|
|
"name": node_name,
|
|
"daemon_state": node_daemon_state,
|
|
"coordinator_state": node_coordinator_state,
|
|
"domain_state": node_domain_state,
|
|
"pvc_version": node_pvc_version,
|
|
"cpu_count": node_cpu_count,
|
|
"kernel": node_kernel,
|
|
"os": node_os,
|
|
"arch": node_arch,
|
|
"health": node_health,
|
|
"health_plugins": node_health_plugins,
|
|
"health_details": node_health_details,
|
|
"load": node_load,
|
|
"domains_count": node_domains_count,
|
|
"running_domains": node_running_domains,
|
|
"vcpu": {
|
|
"total": node_cpu_count,
|
|
"allocated": node_vcpu_allocated,
|
|
},
|
|
"memory": {
|
|
"total": node_mem_total,
|
|
"allocated": node_mem_allocated,
|
|
"provisioned": node_mem_provisioned,
|
|
"used": node_mem_used,
|
|
"free": node_mem_free,
|
|
},
|
|
}
|
|
return node_information
|
|
|
|
|
|
#
|
|
# Direct Functions
|
|
#
|
|
def secondary_node(zkhandler, node):
|
|
# Verify node is valid
|
|
if not common.verifyNode(zkhandler, node):
|
|
return False, "ERROR: No node named {} is present in the cluster.".format(node)
|
|
|
|
# Ensure node is a coordinator
|
|
daemon_mode = zkhandler.read(("node.mode", node))
|
|
if daemon_mode == "hypervisor":
|
|
return (
|
|
False,
|
|
"ERROR: Cannot change coordinator state on non-coordinator node {}".format(
|
|
node
|
|
),
|
|
)
|
|
|
|
# Ensure node is in run daemonstate
|
|
daemon_state = zkhandler.read(("node.state.daemon", node))
|
|
if daemon_state != "run":
|
|
return False, "ERROR: Node {} is not active".format(node)
|
|
|
|
# Get current state
|
|
current_state = zkhandler.read(("node.state.router", node))
|
|
if current_state == "secondary":
|
|
return True, "Node {} is already in secondary coordinator state.".format(node)
|
|
|
|
retmsg = "Setting node {} in secondary coordinator state.".format(node)
|
|
zkhandler.write([("base.config.primary_node", "none")])
|
|
|
|
return True, retmsg
|
|
|
|
|
|
def primary_node(zkhandler, node):
|
|
# Verify node is valid
|
|
if not common.verifyNode(zkhandler, node):
|
|
return False, "ERROR: No node named {} is present in the cluster.".format(node)
|
|
|
|
# Ensure node is a coordinator
|
|
daemon_mode = zkhandler.read(("node.mode", node))
|
|
if daemon_mode == "hypervisor":
|
|
return (
|
|
False,
|
|
"ERROR: Cannot change coordinator state on non-coordinator node {}".format(
|
|
node
|
|
),
|
|
)
|
|
|
|
# Ensure node is in run daemonstate
|
|
daemon_state = zkhandler.read(("node.state.daemon", node))
|
|
if daemon_state != "run":
|
|
return False, "ERROR: Node {} is not active".format(node)
|
|
|
|
# Get current state
|
|
current_state = zkhandler.read(("node.state.router", node))
|
|
if current_state == "primary":
|
|
return True, "Node {} is already in primary coordinator state.".format(node)
|
|
|
|
retmsg = "Setting node {} in primary coordinator state.".format(node)
|
|
zkhandler.write([("base.config.primary_node", node)])
|
|
|
|
return True, retmsg
|
|
|
|
|
|
def flush_node(zkhandler, node, wait=False):
|
|
# Verify node is valid
|
|
if not common.verifyNode(zkhandler, node):
|
|
return False, "ERROR: No node named {} is present in the cluster.".format(node)
|
|
|
|
if zkhandler.read(("node.state.domain", node)) == "flushed":
|
|
return True, "Node {} is already flushed.".format(node)
|
|
|
|
retmsg = "Removing node {} from active service.".format(node)
|
|
|
|
# Add the new domain to Zookeeper
|
|
zkhandler.write([(("node.state.domain", node), "flush")])
|
|
|
|
if wait:
|
|
while zkhandler.read(("node.state.domain", node)) == "flush":
|
|
time.sleep(1)
|
|
retmsg = "Removed node {} from active service.".format(node)
|
|
|
|
return True, retmsg
|
|
|
|
|
|
def ready_node(zkhandler, node, wait=False):
|
|
# Verify node is valid
|
|
if not common.verifyNode(zkhandler, node):
|
|
return False, "ERROR: No node named {} is present in the cluster.".format(node)
|
|
|
|
if zkhandler.read(("node.state.domain", node)) == "ready":
|
|
return True, "Node {} is already ready.".format(node)
|
|
|
|
retmsg = "Restoring node {} to active service.".format(node)
|
|
|
|
# Add the new domain to Zookeeper
|
|
zkhandler.write([(("node.state.domain", node), "unflush")])
|
|
|
|
if wait:
|
|
while zkhandler.read(("node.state.domain", node)) == "unflush":
|
|
time.sleep(1)
|
|
retmsg = "Restored node {} to active service.".format(node)
|
|
|
|
return True, retmsg
|
|
|
|
|
|
def get_node_log(zkhandler, node, lines=2000):
|
|
# Verify node is valid
|
|
if not common.verifyNode(zkhandler, node):
|
|
return False, "ERROR: No node named {} is present in the cluster.".format(node)
|
|
|
|
# Get the data from ZK
|
|
node_log = zkhandler.read(("logs.messages", node))
|
|
|
|
if node_log is None:
|
|
return True, ""
|
|
|
|
# Shrink the log buffer to length lines
|
|
shrunk_log = node_log.split("\n")[-lines:]
|
|
loglines = "\n".join(shrunk_log)
|
|
|
|
return True, loglines
|
|
|
|
|
|
def get_info(zkhandler, node):
|
|
# Verify node is valid
|
|
if not common.verifyNode(zkhandler, node):
|
|
return False, "ERROR: No node named {} is present in the cluster.".format(node)
|
|
|
|
# Get information about node in a pretty format
|
|
node_information = getNodeInformation(zkhandler, node)
|
|
if not node_information:
|
|
return False, "ERROR: Could not get information about node {}.".format(node)
|
|
|
|
return True, node_information
|
|
|
|
|
|
def get_list(
|
|
zkhandler,
|
|
limit=None,
|
|
daemon_state=None,
|
|
coordinator_state=None,
|
|
domain_state=None,
|
|
is_fuzzy=True,
|
|
):
|
|
node_list = []
|
|
full_node_list = zkhandler.children("base.node")
|
|
full_node_list.sort()
|
|
|
|
if is_fuzzy and limit:
|
|
# Implicitly assume fuzzy limits
|
|
if not re.match(r"\^.*", limit):
|
|
limit = ".*" + limit
|
|
if not re.match(r".*\$", limit):
|
|
limit = limit + ".*"
|
|
|
|
for node in full_node_list:
|
|
if limit:
|
|
try:
|
|
if re.fullmatch(limit, node):
|
|
node_list.append(getNodeInformation(zkhandler, node))
|
|
except Exception as e:
|
|
return False, "Regex Error: {}".format(e)
|
|
else:
|
|
node_list.append(getNodeInformation(zkhandler, node))
|
|
|
|
if daemon_state or coordinator_state or domain_state:
|
|
limited_node_list = []
|
|
for node in node_list:
|
|
add_node = False
|
|
if daemon_state and node["daemon_state"] == daemon_state:
|
|
add_node = True
|
|
if coordinator_state and node["coordinator_state"] == coordinator_state:
|
|
add_node = True
|
|
if domain_state and node["domain_state"] == domain_state:
|
|
add_node = True
|
|
if add_node:
|
|
limited_node_list.append(node)
|
|
node_list = limited_node_list
|
|
|
|
return True, node_list
|