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Merge pull request #6 from rnt/parallel-check
Parallel check
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#!/usr/bin/env python3 | ||
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"docker_check.py is a nagios compatible plugin to check docker containers." | ||
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import os | ||
import re | ||
import sys | ||
import argparse | ||
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import logging | ||
import queue | ||
import threading | ||
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logging.basicConfig( | ||
format='%(asctime)s level=%(levelname)-7s ' | ||
'threadName=%(threadName)s name=%(name)s %(message)s', | ||
level=logging.INFO | ||
) | ||
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try: | ||
import docker | ||
except ImportError as e: | ||
except ImportError as error: | ||
print("{}: Please install the docker module, you can use' \ | ||
''pip install docker' to do that".format(e)) | ||
''pip install docker' to do that".format(error)) | ||
sys.exit(1) | ||
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__author__ = 'El Acheche Anis' | ||
__license__ = 'GPL' | ||
__version__ = '0.1' | ||
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def get_mem_pct(ct, stats): | ||
def get_ct_stats(container): | ||
'''Get container status''' | ||
return container.stats(stream=False) | ||
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def get_mem_pct(stats): | ||
'''Get a container memory usage in %''' | ||
mem = stats[ct]['memory_stats'] | ||
usage = mem['usage'] | ||
limit = mem['limit'] | ||
return round(usage*100/limit, 2) | ||
usage = stats['memory_stats']['usage'] | ||
limit = stats['memory_stats']['limit'] | ||
return round(usage * 100 / limit, 2) | ||
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def get_cpu_pct(ct): | ||
'''Get a container cpu usage in % via docker stats cmd''' | ||
usage = str(os.popen("docker stats --no-stream=true "+ct).read()).split() | ||
usage_pct = usage[usage.index(ct)+1] | ||
return float(usage_pct[:-1]) | ||
def get_cpu_pct(stats): | ||
'''Get a container cpu usage in %''' | ||
cpu_delta = stats['cpu_stats']['cpu_usage']['total_usage'] - \ | ||
stats['precpu_stats']['cpu_usage']['total_usage'] | ||
system_delta = stats['cpu_stats']['system_cpu_usage'] - \ | ||
stats['precpu_stats']['system_cpu_usage'] | ||
try: | ||
online_cpus = stats['cpu_stats']['online_cpus'] | ||
except KeyError: | ||
online_cpus = len([item | ||
for item in stats['cpu_stats']['percpu_usage'] | ||
if item > 0]) | ||
if cpu_delta > 0 and system_delta > 0: | ||
return (cpu_delta / system_delta) * online_cpus * 100 | ||
return 0.0 | ||
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def get_net_io(ct, stats): | ||
def get_net_io(stats): | ||
'''Get a container Net In / Out usage since it's launche''' | ||
net = stats[ct]['networks'] | ||
net_in = net['eth0']['rx_bytes'] | ||
net_out = net['eth0']['tx_bytes'] | ||
return [net_in, net_out] | ||
net_in = stats['networks']['eth0']['rx_bytes'] | ||
net_out = stats['networks']['eth0']['tx_bytes'] | ||
return net_in, net_out | ||
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def get_disk_io(ct, stats): | ||
def get_disk_io(stats): | ||
'''Get a container Disk In / Out usage since it's launche''' | ||
disk = stats[ct]['blkio_stats']['io_service_bytes_recursive'] | ||
disk_in = disk[0]['value'] | ||
disk_out = disk[1]['value'] | ||
disk = stats['blkio_stats']['io_service_bytes_recursive'] | ||
try: | ||
disk_in = disk[0]['value'] | ||
except IndexError: | ||
disk_in = 0 | ||
try: | ||
disk_out = disk[1]['value'] | ||
except IndexError: | ||
disk_out = 0 | ||
return disk_in, disk_out | ||
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def get_ct_stats(ct, client): | ||
return client.containers.get(ct).stats(stream=False) | ||
def get_ct_metrics(container_queue, containers_stats): | ||
'''Get container metrics from docker API''' | ||
logging.debug("Running get_ct_metrics()") | ||
while not container_queue.empty(): | ||
container = container_queue.get() | ||
logging.debug("Get container %s stats", container.name) | ||
stats = get_ct_stats(container) | ||
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mem_pct = get_mem_pct(stats) | ||
cpu_pct = get_cpu_pct(stats) | ||
net_in, net_out = get_net_io(stats) | ||
disk_in, disk_out = get_disk_io(stats) | ||
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containers_stats['%s_mem_pct' % container.name] = mem_pct | ||
containers_stats['%s_cpu_pct' % container.name] = cpu_pct | ||
containers_stats['%s_net_in' % container.name] = net_in | ||
containers_stats['%s_net_out' % container.name] = net_out | ||
containers_stats['%s_disk_in' % container.name] = disk_in | ||
containers_stats['%s_disk_out' % container.name] = disk_out | ||
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container_queue.task_done() | ||
logging.debug("Done with container %s stats", container.name) | ||
logging.debug("End get_ct_metrics()") | ||
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def get_ct_stats_message(containers_stats): | ||
'''Get check message from containers stats''' | ||
return ', '.join( | ||
[ | ||
"%s have %.2f%%" % (k, v) | ||
for k, v | ||
in containers_stats.items() | ||
] | ||
) | ||
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def get_ct_perfdata_message(containers_stats): | ||
'''Get perfdata message from containers stats''' | ||
return ' '.join( | ||
[ | ||
"%s=%s" % (k, v) | ||
for k, v | ||
in containers_stats.items() | ||
] | ||
) | ||
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def main(): | ||
'''Scripts main function''' | ||
parser = argparse.ArgumentParser(description='Check docker processes.') | ||
parser.add_argument('-w', '--warning', type=int, help='warning percentage (default 50)', default=50) | ||
parser.add_argument('-c', '--critical', type=int, help='critcal percentage (default 80)', default=80) | ||
parser.add_argument('-w', '--warning', type=int, | ||
help='warning percentage (default 50)', default=50) | ||
parser.add_argument('-c', '--critical', type=int, | ||
help='critcal percentage (default 80)', default=80) | ||
args = parser.parse_args() | ||
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'''Try to use the lastest API version otherwise use | ||
the installed client API version | ||
''' | ||
# Try to use the lastest API version otherwise use | ||
# the installed client API version | ||
# Get list of running containers | ||
try: | ||
docker.from_env().containers.list() | ||
containers_list = docker.from_env().containers.list() | ||
client = docker.from_env() | ||
except docker.errors.APIError as e: | ||
v = re.sub('[^0-9.]+', '', str(e).split('server API version:')[1]) | ||
client = docker.from_env(version=v) | ||
# Get list of running containers | ||
ls = client.containers.list() | ||
ct = [] | ||
# If cid is True containers IDs will be used, otherwise names | ||
cid = False | ||
for i in ls: | ||
c = str(i).replace('<', '').replace('>', '').split()[1] | ||
if cid: | ||
ct.append(c) | ||
else: | ||
ct.append(os.popen("docker ps -f id="+c).read().split()[-1]) | ||
# Get stats and metrics | ||
summary = '' | ||
stats = {} | ||
metrics = [0, 0] | ||
ct_stats = {} | ||
for i in ct: | ||
ct_stats[i] = get_ct_stats(i, client) | ||
mem_pct = get_mem_pct(i, ct_stats) | ||
cpu_pct = get_cpu_pct(i) | ||
net_in = get_net_io(i, ct_stats)[0] | ||
net_out = get_net_io(i, ct_stats)[1] | ||
disk_in = get_disk_io(i, ct_stats)[0] | ||
disk_out = get_disk_io(i, ct_stats)[1] | ||
stats[i+'_mem_pct'] = mem_pct | ||
stats[i+'_cpu_pct'] = cpu_pct | ||
summary += '{}_mem_pct={}% {}_cpu_pct={}% {}_net_in={} {}_net_out={} '\ | ||
'{}_disk_in={} {}_disk_out={} '.format( | ||
i, mem_pct, i, cpu_pct, i, net_in, i, net_out, i, disk_in, | ||
i, disk_out) | ||
# Get the highest % use | ||
for s in stats: | ||
if stats[s] >= metrics[1]: | ||
metrics[0] = s | ||
metrics[1] = stats[s] | ||
except docker.errors.APIError as error: | ||
version = re.sub('[^0-9.]+', '', | ||
str(error).split('server API version:')[1]) | ||
client = docker.from_env(version=version) | ||
containers_list = client.containers.list() | ||
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logging.debug("containers_list = %s", containers_list) | ||
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# START | ||
containers_queue = queue.Queue() | ||
for container in containers_list: | ||
containers_queue.put(container) | ||
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containers_stats = {} | ||
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# Set up some threads to fetch the enclosures | ||
for th_id in range(len(containers_list)): | ||
worker = threading.Thread( | ||
target=get_ct_metrics, | ||
args=(containers_queue, containers_stats,), | ||
name='worker-{}'.format(th_id), | ||
) | ||
worker.setDaemon(True) | ||
worker.start() | ||
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containers_queue.join() | ||
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logging.debug("containers_stats = %s", containers_stats) | ||
stats = { | ||
k: v | ||
for k, v | ||
in containers_stats.items() | ||
if k.endswith('_mem_pct') or k.endswith('_cpu_pct') | ||
} | ||
logging.debug("stats = %s", stats) | ||
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# Check stats values and output perfdata | ||
if metrics[1] < args.warning: | ||
print("OK | {}".format(summary)) | ||
sys.exit(0) | ||
elif args.warning <= metrics[1] <= args.critical: | ||
print("WARNING: Some containers need your attention: {} have {}%'\ | ||
' | {}".format(metrics[0], metrics[1], summary)) | ||
sys.exit(1) | ||
elif metrics[1] > 80: | ||
print("CRITICAL: Some containers need your attention: {} have {}%'\ | ||
' | {}".format(metrics[0], metrics[1], summary)) | ||
sys.exit(2) | ||
else: | ||
print("UKNOWN | {}".format(summary)) | ||
sys.exit(3) | ||
critical_ct = {k: v for k, v in stats.items() if v > args.critical} | ||
if critical_ct: | ||
print("CRITICAL: %s | %s" % ( | ||
get_ct_stats_message(critical_ct), | ||
get_ct_perfdata_message(containers_stats))) | ||
sys.exit(2) | ||
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warning_ct = {k: v for k, v in stats.items() if v > args.warning} | ||
if warning_ct: | ||
print("WARNING: %s | %s" % ( | ||
get_ct_stats_message(warning_ct), | ||
get_ct_perfdata_message(containers_stats))) | ||
sys.exit(1) | ||
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print("OK | %s" % get_ct_perfdata_message(containers_stats)) | ||
sys.exit(0) | ||
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if __name__ == '__main__': | ||
main() | ||
try: | ||
main() | ||
except SystemExit: | ||
pass | ||
except BaseException as exc: | ||
EXC_TYPE, _, EXC_TRACEBACK = sys.exc_info() | ||
FNAME = os.path.split(EXC_TRACEBACK.tb_frame.f_code.co_filename)[1] | ||
print("UNKNOWN: %s Exception \"%s\" in %s line %s" % ( | ||
EXC_TYPE.__name__, exc, FNAME, EXC_TRACEBACK.tb_lineno)) | ||
sys.exit(3) |