def execute_graph_request(rrd_name, data_set, image_file, start_ts, end_ts, consolidation_func, width=640, height=480):
"""Execute the graph request.
:param rrd_name: Name of the RRD against which the reosurce graph is desired
:type rrd_name: str
:param data_set: The data set whose trend is to be retrieved.
:type data_set: list
:param image_file: The name of the resulting graph image file
:type image_file: str
:param start_ts: The starting time of the graph
:type start_ts: int
:param end_ts: The end time of the graph
:type end_ts: int
:param consolidation_func: The consolidation function for the graph (typical: 'AVERAGE', 'LAST', ...)
:type consolidation_func: str
:param width: The width of the graph, in number of pixels
:type width: int
:param height: The height of the graph, in number of pixels
:type height: int
:return: None
:rtype: None
"""
fields = rrdutil.fetch_last_data(rrd_name, end_ts=end_ts, start_ts=start_ts)[1]
# Convert to the dataset format that gen_graph expects
ds = []
for d in data_set:
ds.append((d, _data_set_desc[d]))
title = "CPU utilisation"
if "mem.rrd" in rrd_name:
title = "Memory utilisation"
gen_graph(
image_file,
rrd_name=rrd_name,
title=title,
cf=consolidation_func,
start_ts=start_ts,
end_ts=end_ts,
width=width,
height=height,
dataset=ds,
)
def main(args):
"""Main entry to program.
:param args: Parsed command-line args.
:return: Exit code.
"""
try:
start_ts = (int(time.time()) / _step) * _step # TS should be aligned with the period
# Step 1: Start the monitoring
if (not os.path.exists(_base_name + 'cpu.rrd')) or (not os.path.exists(_base_name + 'mem.rrd')):
fill_in_the_rrds(_base_name + 'cpu.rrd', _base_name + 'mem.rrd', start_ts - (24 * 3600), start_ts, _step)
else:
fill_in_the_rrds(_base_name + 'cpu.rrd', _base_name + 'mem.rrd',
int(rrdutil.get_last_update(_base_name + 'cpu.rrd')) + _step, start_ts, _step)
monitor = resmon_util.start_monitor(_base_name, _step)
try:
prev_ts = start_ts
for loop in range(0, 360): # Run for an hour (360 loops of 10 seconds).
# Step 2: Wait for some time (10s) for the monitor to gather data
logger.info('Waiting for data, loop #{0}'.format(loop))
time.sleep(10)
# Step 3: Observe the result
last_cpu_data = rrdutil.fetch_last_data(monitor.get_cpu_rrd(), start_ts=prev_ts, resolution=1)
last_mem_data = rrdutil.fetch_last_data(monitor.get_mem_rrd(), start_ts=prev_ts)
# Print out the result
print('\nLAST CPU data {0}, curr time = {1}'.format(last_cpu_data[0], int(time.time())))
print(rrdutil.format_cpu_stats(last_cpu_data))
print('\nLAST Memory data {0}'.format(last_mem_data[0]))
print(rrdutil.format_mem_stats(last_mem_data))
prev_ts = (int(time.time()) / _step) * _step # TS should be aligned with the period
avg_data = rrdutil.fetch_avg_data(monitor.get_cpu_rrd(), start_ts=start_ts, resolution=10)
print('\nAVG CPU data {0}'.format(avg_data[0]))
print(rrdutil.format_cpu_stats(avg_data))
avg_data = rrdutil.fetch_avg_data(monitor.get_mem_rrd(), start_ts=start_ts, resolution=10)
print('\nAVG Memory data {0}'.format(avg_data[0]))
print(rrdutil.format_mem_stats(avg_data))
finally:
# Don't forget to stop the monitor when finish
logger.info('Stopping {0}'.format(monitor))
monitor.stop()
# Generate a graph
end_graf = time.time()
start_graf = end_graf - (2 * SECONDS_IN_HOUR)
gen_graph('cpu.png', rrd_name=monitor.get_cpu_rrd(), title='CPU Utilisation', cf='AVERAGE',
start_ts=start_graf, end_ts=end_graf,
dataset=[('idle', '%Idle'), ('wait', '%Wait'), ('load', 'Load avg')])
gen_graph('mem.png', rrd_name=monitor.get_mem_rrd(), title='Memory Utilisation', cf='AVERAGE',
start_ts=start_graf, end_ts=end_graf,
dataset=[('memtotal', 'Total'), ('memfree', 'Free'), ('buffers', 'Buffers'),
('cached', 'Cached')])
except (TypeError, ValueError) as e:
logger.warning('Encountered invalid monitor period {0}, at {1}'.format(e, format_tb(sys.exc_info()[2])))
except KeyboardInterrupt:
logger.warning('User interruption at {0}'.format(format_tb(sys.exc_info()[2])))
except BaseException as e:
logger.error('Encountered unexpected exception {0} at {1}'.format(repr(e), format_tb(sys.exc_info()[2])))