/
database_event_manager.py
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/
database_event_manager.py
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#
# Copyright (c) 2015 Juniper Networks, Inc. All rights reserved.
#
from gevent import monkey
monkey.patch_all()
import os
import sys
import socket
import subprocess
import json
import time
import datetime
import platform
import select
import gevent
import ConfigParser
from nodemgr.event_manager import EventManager
from ConfigParser import NoOptionError
from supervisor import childutils
from pysandesh.sandesh_base import *
from pysandesh.sandesh_session import SandeshWriter
from pysandesh.gen_py.sandesh_trace.ttypes import SandeshTraceRequest
from sandesh_common.vns.ttypes import Module, NodeType
from sandesh_common.vns.constants import ModuleNames, NodeTypeNames,\
Module2NodeType, INSTANCE_ID_DEFAULT, SERVICE_CONTRAIL_DATABASE
from subprocess import Popen, PIPE
from StringIO import StringIO
from database.sandesh.database.ttypes import \
NodeStatusUVE, NodeStatus, DatabaseUsageStats,\
DatabaseUsageInfo, DatabaseUsage
from database.sandesh.database.process_info.ttypes import \
ProcessStatus, ProcessState, ProcessInfo, DiskPartitionUsageStats
from database.sandesh.database.process_info.constants import \
ProcessStateNames
class DatabaseEventManager(EventManager):
def __init__(self, rule_file, discovery_server,
discovery_port, collector_addr,
hostip, minimum_diskgb):
EventManager.__init__(
self, rule_file, discovery_server,
discovery_port, collector_addr)
self.node_type = "contrail-database"
self.module = Module.DATABASE_NODE_MGR
self.module_id = ModuleNames[self.module]
self.hostip = hostip
self.minimum_diskgb = minimum_diskgb
self.supervisor_serverurl = "unix:///tmp/supervisord_database.sock"
self.add_current_process()
# end __init__
def process(self):
if self.rule_file is '':
self.rule_file = "/etc/contrail/" + \
"supervisord_database_files/contrail-database.rules"
json_file = open(self.rule_file)
self.rules_data = json.load(json_file)
node_type = Module2NodeType[self.module]
node_type_name = NodeTypeNames[node_type]
_disc = self.get_discovery_client()
sandesh_global.init_generator(
self.module_id, socket.gethostname(), node_type_name,
self.instance_id, self.collector_addr, self.module_id, 8103,
['database.sandesh'], _disc)
# sandesh_global.set_logging_params(enable_local_log=True)
self.sandesh_global = sandesh_global
(linux_dist, x, y) = platform.linux_distribution()
if (linux_dist == 'Ubuntu'):
popen_cmd = "set `df -Pk" + \
" \`sed -n -e '/'data_file_directories'/,/'#'/p'" + \
" /etc/cassandra/cassandra.yaml | grep '-' | cut -d '-' -f2" + \
" | sed 's/$/\/ContrailAnalytics/'\` | grep % |" + \
" awk '{s+=$3}END{print s}'` && echo $1"
(disk_space_used, error_value) = \
Popen(popen_cmd, shell=True, stdout=PIPE).communicate()
popen_cmd = "set `df -Pk" + \
" \`sed -n -e '/'data_file_directories'/,/'#'/p'" + \
" /etc/cassandra/cassandra.yaml | grep '-' | cut -d '-' -f2" + \
" | sed 's/$/\/ContrailAnalytics/'\` | grep % |" + \
" awk '{s+=$4}END{print s}'` && echo $1"
(disk_space_available, error_value) = \
Popen(popen_cmd, shell=True, stdout=PIPE).communicate()
popen_cmd = "set `du -skL" + \
" \`sed -n -e '/'data_file_directories'/,/'#'/p'" + \
" /etc/cassandra/cassandra.yaml | grep '-' | cut -d '-' -f2" + \
" | sed 's/$/\/ContrailAnalytics/'\` |" + \
" awk '{s+=$1}END{print s}'` && echo $1"
(analytics_db_size, error_value) = \
Popen(popen_cmd, shell=True, stdout=PIPE).communicate()
else:
popen_cmd = "set `df -Pk" + \
" \`sed -n -e '/'data_file_directories'/,/'#'/p'" + \
" /etc/cassandra/conf/cassandra.yaml | grep '-' |" + \
" cut -d '-' -f2 | sed 's/$/\/ContrailAnalytics/'\` |" + \
" grep % | awk '{s+=$3}END{print s}'` && echo $1"
(disk_space_used, error_value) = \
Popen(popen_cmd, shell=True, stdout=PIPE).communicate()
popen_cmd = "set `df -Pk" + \
" \`sed -n -e '/'data_file_directories'/,/'#'/p'" + \
" /etc/cassandra/conf/cassandra.yaml | grep '-' |" + \
" cut -d '-' -f2 | sed 's/$/\/ContrailAnalytics/'\` |" + \
" grep % | awk '{s+=$4}END{print s}'` && echo $1"
(disk_space_available, error_value) = \
Popen(popen_cmd, shell=True, stdout=PIPE).communicate()
popen_cmd = "set `du -skL" + \
" \`sed -n -e '/'data_file_directories'/,/'#'/p'" + \
" /etc/cassandra/conf/cassandra.yaml | grep '-' |" + \
" cut -d '-' -f2 | sed 's/$/\/ContrailAnalytics/'\` |" + \
" awk '{s+=$1}END{print s}'` && echo $1"
(analytics_db_size, error_value) = \
Popen(popen_cmd, shell=True, stdout=PIPE).communicate()
disk_space_total = int(disk_space_used) + int(disk_space_available)
if (disk_space_total / (1024 * 1024) < self.minimum_diskgb):
cmd_str = "service " + SERVICE_CONTRAIL_DATABASE + " stop"
(ret_value, error_value) = Popen(
cmd_str, shell=True, stdout=PIPE).communicate()
self.fail_status_bits |= self.FAIL_STATUS_DISK_SPACE
def send_process_state_db(self, group_names):
self.send_process_state_db_base(
group_names, ProcessInfo, NodeStatus, NodeStatusUVE)
def send_nodemgr_process_status(self):
self.send_nodemgr_process_status_base(
ProcessStateNames, ProcessState, ProcessStatus,
NodeStatus, NodeStatusUVE)
def get_process_state(self, fail_status_bits):
return self.get_process_state_base(
fail_status_bits, ProcessStateNames, ProcessState)
def get_failbits_nodespecific_desc(self, fail_status_bits):
description = ""
if fail_status_bits & self.FAIL_STATUS_DISK_SPACE:
description += "Disk for analytics db is too low," + \
" cassandra stopped."
if fail_status_bits & self.FAIL_STATUS_SERVER_PORT:
if description != "":
description += " "
description += "Cassandra state detected DOWN."
return description
def database_periodic(self):
(linux_dist, x, y) = platform.linux_distribution()
if (linux_dist == 'Ubuntu'):
popen_cmd = "set `df -Pk" + \
" \`sed -n -e '/'data_file_directories'/,/'#'/p'" + \
" /etc/cassandra/cassandra.yaml | grep '-' | cut -d '-' -f2" + \
" | sed 's/$/\/ContrailAnalytics/'\` | grep % |" + \
" awk '{s+=$3}END{print s}'` && echo $1"
(disk_space_used, error_value) = \
Popen(popen_cmd, shell=True, stdout=PIPE).communicate()
popen_cmd = "set `df -Pk" + \
" \`sed -n -e '/'data_file_directories'/,/'#'/p'" + \
" /etc/cassandra/cassandra.yaml | grep '-' | cut -d '-' -f2" + \
" | sed 's/$/\/ContrailAnalytics/'\` | grep % |" + \
" awk '{s+=$4}END{print s}'` && echo $1"
(disk_space_available, error_value) = \
Popen(popen_cmd, shell=True, stdout=PIPE).communicate()
popen_cmd = "set `du -skL" + \
" \`sed -n -e '/'data_file_directories'/,/'#'/p'" + \
" /etc/cassandra/cassandra.yaml | grep '-' | cut -d '-' -f2" + \
" | sed 's/$/\/ContrailAnalytics/'\` |" + \
" awk '{s+=$1}END{print s}'` && echo $1"
(analytics_db_size, error_value) = \
Popen(popen_cmd, shell=True, stdout=PIPE).communicate()
else:
popen_cmd = "set `df -Pk" + \
" \`sed -n -e '/'data_file_directories'/,/'#'/p'" + \
" /etc/cassandra/conf/cassandra.yaml | grep '-' |" + \
" cut -d '-' -f2 | sed 's/$/\/ContrailAnalytics/'\` |" + \
" grep % | awk '{s+=$3}END{print s}'` && echo $1"
(disk_space_used, error_value) = \
Popen(popen_cmd, shell=True, stdout=PIPE).communicate()
popen_cmd = "set `df -Pk" + \
" \`sed -n -e '/'data_file_directories'/,/'#'/p'" + \
" /etc/cassandra/conf/cassandra.yaml | grep '-' |" + \
" cut -d '-' -f2 | sed 's/$/\/ContrailAnalytics/'\` |" + \
" grep % | awk '{s+=$4}END{print s}'` && echo $1"
(disk_space_available, error_value) = \
Popen(popen_cmd, shell=True, stdout=PIPE).communicate()
popen_cmd = "set `du -skL" + \
" \`sed -n -e '/'data_file_directories'/,/'#'/p'" + \
" /etc/cassandra/conf/cassandra.yaml | grep '-' |" + \
" cut -d '-' -f2 | sed 's/$/\/ContrailAnalytics/'\` |" + \
" awk '{s+=$1}END{print s}'` && echo $1"
(analytics_db_size, error_value) = \
Popen(popen_cmd, shell=True, stdout=PIPE).communicate()
db_stat = DatabaseUsageStats()
db_info = DatabaseUsageInfo()
try:
db_stat.disk_space_used_1k = int(disk_space_used)
db_stat.disk_space_available_1k = int(disk_space_available)
db_stat.analytics_db_size_1k = int(analytics_db_size)
except ValueError:
sys.stderr.write("Failed to get database usage" + "\n")
else:
db_info.name = socket.gethostname()
db_info.database_usage = [db_stat]
usage_stat = DatabaseUsage(data=db_info)
usage_stat.send()
cassandra_cli_cmd = "cassandra-cli --host " + self.hostip + \
" --batch < /dev/null | grep 'Connected to:'"
proc = Popen(cassandra_cli_cmd, shell=True, stdout=PIPE, stderr=PIPE)
(output, errout) = proc.communicate()
if proc.returncode != 0:
self.fail_status_bits |= self.FAIL_STATUS_SERVER_PORT
else:
self.fail_status_bits &= ~self.FAIL_STATUS_SERVER_PORT
self.send_nodemgr_process_status()
# end database_periodic
def send_disk_usage_info(self):
self.send_disk_usage_info_base(
NodeStatusUVE, NodeStatus, DiskPartitionUsageStats)
def runforever(self, test=False):
prev_current_time = int(time.time())
while 1:
gevent.sleep(1)
# we explicitly use self.stdin, self.stdout, and self.stderr
# instead of sys.* so we can unit test this code
headers, payload = self.listener_nodemgr.wait(
self.stdin, self.stdout)
# self.stderr.write("headers:\n" + str(headers) + '\n')
# self.stderr.write("payload:\n" + str(payload) + '\n')
pheaders, pdata = childutils.eventdata(payload + '\n')
# self.stderr.write("pheaders:\n" + str(pheaders)+'\n')
# self.stderr.write("pdata:\n" + str(pdata))
# check for process state change events
if headers['eventname'].startswith("PROCESS_STATE"):
self.event_process_state(pheaders, headers)
# check for flag value change events
if headers['eventname'].startswith("PROCESS_COMMUNICATION"):
self.event_process_communication(pdata)
# do periodic events
if headers['eventname'].startswith("TICK_60"):
self.database_periodic()
prev_current_time = self.event_tick_60(prev_current_time)
self.listener_nodemgr.ok(self.stdout)