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pvc/api-daemon/pvcapid/benchmark.py

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#!/usr/bin/env python3
# benchmark.py - PVC API Benchmark functions
# Part of the Parallel Virtual Cluster (PVC) system
#
# Copyright (C) 2018-2021 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 psycopg2
import psycopg2.extras
from json import loads, dumps
from pvcapid.Daemon import config
from daemon_lib.zkhandler import ZKHandler
import daemon_lib.common as pvc_common
import daemon_lib.ceph as pvc_ceph
#
# Exceptions (used by Celery tasks)
#
class BenchmarkError(Exception):
"""
An exception that results from the Benchmark job.
"""
def __init__(self, message, job_name=None, db_conn=None, db_cur=None, zkhandler=None):
self.message = message
if job_name is not None:
# Clean up our dangling result
query = "DELETE FROM storage_benchmarks WHERE job = %s;"
args = (job_name,)
db_cur.execute(query, args)
db_conn.commit()
# Close the database connections cleanly
close_database(db_conn, db_cur)
zkhandler.disconnect()
def __str__(self):
return str(self.message)
#
# Common functions
#
# Database connections
def open_database(config):
conn = psycopg2.connect(
host=config['database_host'],
port=config['database_port'],
dbname=config['database_name'],
user=config['database_user'],
password=config['database_password']
)
cur = conn.cursor(cursor_factory=psycopg2.extras.RealDictCursor)
return conn, cur
def close_database(conn, cur, failed=False):
if not failed:
conn.commit()
cur.close()
conn.close()
def list_benchmarks(job=None):
if job is not None:
query = "SELECT * FROM {} WHERE job = %s;".format('storage_benchmarks')
args = (job, )
else:
query = "SELECT * FROM {} ORDER BY id DESC;".format('storage_benchmarks')
args = ()
conn, cur = open_database(config)
cur.execute(query, args)
orig_data = cur.fetchall()
data = list()
for benchmark in orig_data:
benchmark_data = dict()
benchmark_data['id'] = benchmark['id']
benchmark_data['job'] = benchmark['job']
benchmark_data['test_format'] = benchmark['test_format']
benchmark_data['benchmark_result'] = loads(benchmark['result'])
# Append the new data to our actual output structure
data.append(benchmark_data)
close_database(conn, cur)
if data:
return data, 200
else:
return {'message': 'No benchmark found.'}, 404
def run_benchmark(self, pool):
# Runtime imports
import time
from datetime import datetime
# Define the current test format
TEST_FORMAT = 1
time.sleep(2)
# Phase 0 - connect to databases
try:
db_conn, db_cur = open_database(config)
except Exception:
print('FATAL - failed to connect to Postgres')
raise Exception
try:
zkhandler = ZKHandler(config)
zkhandler.connect()
except Exception:
print('FATAL - failed to connect to Zookeeper')
raise Exception
cur_time = datetime.now().isoformat(timespec='seconds')
cur_primary = zkhandler.read('base.config.primary_node')
job_name = '{}_{}'.format(cur_time, cur_primary)
print("Starting storage benchmark '{}' on pool '{}'".format(job_name, pool))
print("Storing running status for job '{}' in database".format(job_name))
try:
query = "INSERT INTO storage_benchmarks (job, test_format, result) VALUES (%s, %s);"
args = (job_name, TEST_FORMAT, "Running",)
db_cur.execute(query, args)
db_conn.commit()
except Exception as e:
raise BenchmarkError("Failed to store running status: {}".format(e), job_name=job_name, db_conn=db_conn, db_cur=db_cur, zkhandler=zkhandler)
# Phase 1 - volume preparation
self.update_state(state='RUNNING', meta={'current': 1, 'total': 3, 'status': 'Creating benchmark volume'})
time.sleep(1)
volume = 'pvcbenchmark'
# Create the RBD volume
retcode, retmsg = pvc_ceph.add_volume(zkhandler, pool, volume, "8G")
if not retcode:
raise BenchmarkError('Failed to create volume "{}": {}'.format(volume, retmsg), job_name=job_name, db_conn=db_conn, db_cur=db_cur, zkhandler=zkhandler)
else:
print(retmsg)
# Phase 2 - benchmark run
self.update_state(state='RUNNING', meta={'current': 2, 'total': 3, 'status': 'Running fio benchmarks on volume'})
time.sleep(1)
# We run a total of 8 tests, to give a generalized idea of performance on the cluster:
# 1. A sequential read test of 8GB with a 4M block size
# 2. A sequential write test of 8GB with a 4M block size
# 3. A random read test of 8GB with a 4M block size
# 4. A random write test of 8GB with a 4M block size
# 5. A random read test of 8GB with a 256k block size
# 6. A random write test of 8GB with a 256k block size
# 7. A random read test of 8GB with a 4k block size
# 8. A random write test of 8GB with a 4k block size
# Taken together, these 8 results should give a very good indication of the overall storage performance
# for a variety of workloads.
test_matrix = {
'seq_read': {
'direction': 'read',
'iodepth': '64',
'bs': '4M',
'rw': 'read'
},
'seq_write': {
'direction': 'write',
'iodepth': '64',
'bs': '4M',
'rw': 'write'
},
'rand_read_4M': {
'direction': 'read',
'iodepth': '64',
'bs': '4M',
'rw': 'randread'
},
'rand_write_4M': {
'direction': 'write',
'iodepth': '64',
'bs': '4M',
'rw': 'randwrite'
},
'rand_read_4K': {
'direction': 'read',
'iodepth': '64',
'bs': '4K',
'rw': 'randread'
},
'rand_write_4K': {
'direction': 'write',
'iodepth': '64',
'bs': '4K',
'rw': 'randwrite'
},
'rand_read_4K_lowdepth': {
'direction': 'read',
'iodepth': '1',
'bs': '4K',
'rw': 'randread'
},
'rand_write_4K_lowdepth': {
'direction': 'write',
'iodepth': '1',
'bs': '4K',
'rw': 'randwrite'
},
}
results = dict()
for test in test_matrix:
print("Running test '{}'".format(test))
fio_cmd = """
fio \
--name={test} \
--ioengine=rbd \
--pool={pool} \
--rbdname={volume} \
--output-format=json \
--direct=1 \
--randrepeat=1 \
--numjobs=1 \
--time_based \
--runtime=60 \
--ramp_time=15 \
--group_reporting \
--iodepth={iodepth} \
--bs={bs} \
--readwrite={rw}
""".format(
test=test,
pool=pool,
volume=volume,
iodepth=test_matrix[test]['iodepth'],
bs=test_matrix[test]['bs'],
rw=test_matrix[test]['rw'])
retcode, stdout, stderr = pvc_common.run_os_command(fio_cmd)
if retcode:
raise BenchmarkError("Failed to run fio test: {}".format(stderr), job_name=job_name, db_conn=db_conn, db_cur=db_cur, zkhandler=zkhandler)
results[test] = loads(stdout)
# Phase 3 - cleanup
self.update_state(state='RUNNING', meta={'current': 3, 'total': 3, 'status': 'Cleaning up and storing results'})
time.sleep(1)
# Remove the RBD volume
retcode, retmsg = pvc_ceph.remove_volume(zkhandler, pool, volume)
if not retcode:
raise BenchmarkError('Failed to remove volume "{}": {}'.format(volume, retmsg), job_name=job_name, db_conn=db_conn, db_cur=db_cur, zkhandler=zkhandler)
else:
print(retmsg)
print("Storing result of tests for job '{}' in database".format(job_name))
try:
query = "UPDATE storage_benchmarks SET result = %s WHERE job = %s;"
args = (dumps(results), job_name)
db_cur.execute(query, args)
db_conn.commit()
except Exception as e:
raise BenchmarkError("Failed to store test results: {}".format(e), job_name=job_name, db_conn=db_conn, db_cur=db_cur, zkhandler=zkhandler)
close_database(db_conn, db_cur)
zkhandler.disconnect()
del zkhandler
return {'status': "Storage benchmark '{}' completed successfully.", 'current': 3, 'total': 3}
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