glances.plugins.containers.engines.docker.DockerStatsFetcher._get_cpu_stats() - Code Metrics - Inspection of "Glances version 4.0.0" - nicolargo/glances - Measure and Improve Code Quality continuously with Scrutinizer

Test Failed

Push — master ( ee826a...d9056e )

by Nicolas

created 2024-05-12 08:45 UTC

DockerStatsFetcher._get_cpu_stats() A

↳ Parent: glances.plugins.containers.engines.docker

Complexity

Conditions

Size

Total Lines	33
Code Lines	19

Duplication

Lines	0
Ratio	0 %

Importance

Changes

Metric	Value
cc	3
eloc	19
nop	1
dl	0
loc	33
rs	9.45
c	0
b	0
f	0

# -*- coding: utf-8 -*-
#
# This file is part of Glances.
#
# SPDX-FileCopyrightText: 2024 Nicolas Hennion <[email protected]>
#
# SPDX-License-Identifier: LGPL-3.0-only
#

"""Docker Extension unit for Glances' Containers plugin."""
import time

from glances.globals import iterkeys, itervalues, nativestr, pretty_date, replace_special_chars
from glances.logger import logger
from glances.plugins.containers.stats_streamer import StatsStreamer

# Docker-py library (optional and Linux-only)
# https://github.com/docker/docker-py
try:
    import requests
    import docker
    from dateutil import parser, tz
except Exception as e:
    import_docker_error_tag = True
    # Display debug message if import KeyError
    logger.warning("Error loading Docker deps Lib. Docker plugin is disabled ({})".format(e))
else:
    import_docker_error_tag = False


class DockerStatsFetcher:
    MANDATORY_MEMORY_FIELDS = ['usage', 'limit']

    def __init__(self, container):
        self._container = container

        # Previous computes stats are stored in the self._old_computed_stats variable
        # We store time data to enable IoR/s & IoW/s calculations to avoid complexity for consumers of the APIs exposed.
        self._old_computed_stats = {}

        # Last time when output stats (results) were computed
        self._last_stats_computed_time = 0

        # Threaded Streamer
        stats_iterable = container.stats(decode=True)
        self._streamer = StatsStreamer(stats_iterable, initial_stream_value={})

    def _log_debug(self, msg, exception=None):
        logger.debug("containers (Docker) ID: {} - {} ({}) ".format(self._container.id, msg, exception))
        logger.debug(self._streamer.stats)

    def stop(self):
        self._streamer.stop()

    @property
    def activity_stats(self):
        """Activity Stats

        Each successive access of activity_stats will cause computation of activity_stats
        """
        computed_activity_stats = self._compute_activity_stats()
        self._old_computed_stats = computed_activity_stats
        self._last_stats_computed_time = time.time()
        return computed_activity_stats

    def _compute_activity_stats(self):
        with self._streamer.result_lock:
            io_stats = self._get_io_stats()
            cpu_stats = self._get_cpu_stats()
            memory_stats = self._get_memory_stats()
            network_stats = self._get_network_stats()

        computed_stats = {
            "io": io_stats or {},
            "memory": memory_stats or {},
            "network": network_stats or {},
            "cpu": cpu_stats or {"total": 0.0},
        }
        return computed_stats

    @property
    def time_since_update(self):
        # In case no update, default to 1
        return max(1, self._streamer.last_update_time - self._last_stats_computed_time)

    def _get_cpu_stats(self):
        """Return the container CPU usage.

        Output: a dict {'total': 1.49}
        """
        stats = {'total': 0.0}

        try:
            cpu_stats = self._streamer.stats['cpu_stats']
            precpu_stats = self._streamer.stats['precpu_stats']
            cpu = {'system': cpu_stats['system_cpu_usage'], 'total': cpu_stats['cpu_usage']['total_usage']}
            precpu = {'system': precpu_stats['system_cpu_usage'], 'total': precpu_stats['cpu_usage']['total_usage']}

            # Issue #1857
            # If either precpu_stats.online_cpus or cpu_stats.online_cpus is nil
            # then for compatibility with older daemons the length of
            # the corresponding cpu_usage.percpu_usage array should be used.
            cpu['nb_core'] = cpu_stats.get('online_cpus') or len(cpu_stats['cpu_usage']['percpu_usage'] or [])
        except KeyError as e:
            self._log_debug("Can't grab CPU stats", e)
            return None

        try:
            cpu_delta = cpu['total'] - precpu['total']
            system_cpu_delta = cpu['system'] - precpu['system']
            # CPU usage % = (cpu_delta / system_cpu_delta) * number_cpus * 100.0
            stats['total'] = (cpu_delta / system_cpu_delta) * cpu['nb_core'] * 100.0
        except TypeError as e:
            self._log_debug("Can't compute CPU usage", e)
            return None

        # Return the stats
        return stats

    def _get_memory_stats(self):
        """Return the container MEMORY.

        Output: a dict {'usage': ..., 'limit': ..., 'inactive_file': ...}

        Note:the displayed memory usage is 'usage - inactive_file'
        """
        memory_stats = self._streamer.stats.get('memory_stats')

        # Checks for memory_stats & mandatory fields
        if not memory_stats or any(field not in memory_stats for field in self.MANDATORY_MEMORY_FIELDS):
            self._log_debug("Missing MEM usage fields")
            return None

        stats = {field: memory_stats[field] for field in self.MANDATORY_MEMORY_FIELDS}

        # Optional field stats: inactive_file
        if memory_stats.get('stats', {}).get('inactive_file') is not None:
            stats['inactive_file'] = memory_stats['stats']['inactive_file']

        # Return the stats
        return stats

    def _get_network_stats(self):
        """Return the container network usage using the Docker API (v1.0 or higher).

        Output: a dict {'time_since_update': 3000, 'rx': 10, 'tx': 65}.
        with:
            time_since_update: number of seconds elapsed between the latest grab
            rx: Number of bytes received
            tx: Number of bytes transmitted
        """
        eth0_stats = self._streamer.stats.get('networks', {}).get('eth0')

        # Checks for net_stats & mandatory fields
        if not eth0_stats or any(field not in eth0_stats for field in ['rx_bytes', 'tx_bytes']):
            self._log_debug("Missing Network usage fields")
            return None

        # Read the rx/tx stats (in bytes)
        stats = {'cumulative_rx': eth0_stats["rx_bytes"], 'cumulative_tx': eth0_stats["tx_bytes"]}

        # Using previous stats to calculate rates
        old_network_stats = self._old_computed_stats.get("network")
        if old_network_stats:
            stats['time_since_update'] = round(self.time_since_update)
            stats['rx'] = stats['cumulative_rx'] - old_network_stats["cumulative_rx"]
            stats['tx'] = stats['cumulative_tx'] - old_network_stats['cumulative_tx']

        # Return the stats
        return stats

    def _get_io_stats(self):
        """Return the container IO usage using the Docker API (v1.0 or higher).

        Output: a dict {'time_since_update': 3000, 'ior': 10, 'iow': 65}.
        with:
            time_since_update: number of seconds elapsed between the latest grab
            ior: Number of bytes read
            iow: Number of bytes written
        """
        io_service_bytes_recursive = self._streamer.stats.get('blkio_stats', {}).get('io_service_bytes_recursive')

        # Checks for net_stats
        if not io_service_bytes_recursive:
            self._log_debug("Missing blockIO usage fields")
            return None

        # Read the ior/iow stats (in bytes)
        try:
            # Read IOR and IOW value in the structure list of dict
            cumulative_ior = [i for i in io_service_bytes_recursive if i['op'].lower() == 'read'][0]['value']
            cumulative_iow = [i for i in io_service_bytes_recursive if i['op'].lower() == 'write'][0]['value']
        except (TypeError, IndexError, KeyError, AttributeError) as e:
            self._log_debug("Can't grab blockIO usage", e)  # stats do not have io information
            return None

        stats = {'cumulative_ior': cumulative_ior, 'cumulative_iow': cumulative_iow}

        # Using previous stats to calculate difference
        old_io_stats = self._old_computed_stats.get("io")
        if old_io_stats:
            stats['time_since_update'] = round(self.time_since_update)
            stats['ior'] = stats['cumulative_ior'] - old_io_stats["cumulative_ior"]
            stats['iow'] = stats['cumulative_iow'] - old_io_stats["cumulative_iow"]

        # Return the stats
        return stats


class DockerContainersExtension:
    """Glances' Containers Plugin's Docker Extension unit"""

    CONTAINER_ACTIVE_STATUS = ['running', 'paused']

    def __init__(self):
        if import_docker_error_tag:
            raise Exception("Missing libs required to run Docker Extension (Containers) ")

        self.client = None
        self.ext_name = "containers (Docker)"
        self.stats_fetchers = {}

        self.connect()

    def connect(self):
        """Connect to the Docker server."""
        # Init the Docker API Client
        try:
            # Do not use the timeout option (see issue #1878)
            self.client = docker.from_env()
        except Exception as e:
            logger.error("{} plugin - Can't connect to Docker ({})".format(self.ext_name, e))
            self.client = None

    def update_version(self):
        # Long and not useful anymore because the information is no more displayed in UIs
        # return self.client.version()
        return {}

    def stop(self):
        # Stop all streaming threads
        for t in itervalues(self.stats_fetchers):
            t.stop()

    def update(self, all_tag):
        """Update Docker stats using the input method."""

        if not self.client:
            return {}, []

        version_stats = self.update_version()

        # Update current containers list
        try:
            # Issue #1152: Docker module doesn't export details about stopped containers
            # The Containers/all key of the configuration file should be set to True
            containers = self.client.containers.list(all=all_tag)
        except Exception as e:
            logger.error("{} plugin - Can't get containers list ({})".format(self.ext_name, e))
            return version_stats, []

        # Start new thread for new container
        for container in containers:
            if container.id not in self.stats_fetchers:
                # StatsFetcher did not exist in the internal dict
                # Create it, add it to the internal dict
                logger.debug("{} plugin - Create thread for container {}".format(self.ext_name, container.id[:12]))
                self.stats_fetchers[container.id] = DockerStatsFetcher(container)

        # Stop threads for non-existing containers
        absent_containers = set(iterkeys(self.stats_fetchers)) - set(c.id for c in containers)
        for container_id in absent_containers:
            # Stop the StatsFetcher
            logger.debug("{} plugin - Stop thread for old container {}".format(self.ext_name, container_id[:12]))
            self.stats_fetchers[container_id].stop()
            # Delete the StatsFetcher from the dict
            del self.stats_fetchers[container_id]

        # Get stats for all containers
        container_stats = [self.generate_stats(container) for container in containers]
        return version_stats, container_stats

    @property
    def key(self):
        """Return the key of the list."""
        return 'name'

    def generate_stats(self, container):
        # Init the stats for the current container
        stats = {
            'key': self.key,
            # Export name
            'name': nativestr(container.name),
            # Container Id
            'id': container.id,
            # Container Status (from attrs)
            'status': container.attrs['State']['Status'],
            'created': container.attrs['Created'],
            'command': [],
        }

        # Container Image
        try:
            # API fails on Unraid - See issue 2233
            stats['image'] = (','.join(container.image.tags if container.image.tags else []),)
        except requests.exceptions.HTTPError:
            stats['image'] = ''

        if container.attrs['Config'].get('Entrypoint', None):
            stats['command'].extend(container.attrs['Config'].get('Entrypoint', []))
        if container.attrs['Config'].get('Cmd', None):
            stats['command'].extend(container.attrs['Config'].get('Cmd', []))
        if not stats['command']:
            stats['command'] = None

        if stats['status'] in self.CONTAINER_ACTIVE_STATUS:
            started_at = container.attrs['State']['StartedAt']
            stats_fetcher = self.stats_fetchers[container.id]
            activity_stats = stats_fetcher.activity_stats
            stats.update(activity_stats)

            # Additional fields
            stats['cpu_percent'] = stats["cpu"]['total']
            stats['memory_usage'] = stats["memory"].get('usage')
            if stats['memory'].get('cache') is not None:
                stats['memory_usage'] -= stats['memory']['cache']
            if 'time_since_update' in stats['io']:
                stats['io_rx'] = stats['io'].get('ior') // stats['io'].get('time_since_update')
                stats['io_wx'] = stats['io'].get('iow') // stats['io'].get('time_since_update')
            if 'time_since_update' in stats['network']:
                stats['network_rx'] = stats['network'].get('rx') // stats['network'].get('time_since_update')
                stats['network_tx'] = stats['network'].get('tx') // stats['network'].get('time_since_update')
            stats['uptime'] = pretty_date(parser.parse(started_at).astimezone(tz.tzlocal()).replace(tzinfo=None))
            # Manage special chars in command (see isse#2733)
            stats['command'] = replace_special_chars(' '.join(stats['command']))
        else:
            stats['io'] = {}
            stats['cpu'] = {}
            stats['memory'] = {}
            stats['network'] = {}
            stats['io_rx'] = None
            stats['io_wx'] = None
            stats['cpu_percent'] = None
            stats['memory_percent'] = None
            stats['network_rx'] = None
            stats['network_tx'] = None
            stats['uptime'] = None

        return stats


1			# -- coding: utf-8 --
2			#
3			# This file is part of Glances.
4			#
5			# SPDX-FileCopyrightText: 2024 Nicolas Hennion <[email protected]>
6			#
7			# SPDX-License-Identifier: LGPL-3.0-only
8			#
9
10			"""Docker Extension unit for Glances' Containers plugin."""
11			import time
12
13			from glances.globals import iterkeys, itervalues, nativestr, pretty_date, replace_special_chars
14			from glances.logger import logger
15			from glances.plugins.containers.stats_streamer import StatsStreamer
16
17			# Docker-py library (optional and Linux-only)
18			# https://github.com/docker/docker-py
19			try:
20			import requests
21			import docker
22			from dateutil import parser, tz
23			except Exception as e:
24			import_docker_error_tag = True
25			# Display debug message if import KeyError
26			logger.warning("Error loading Docker deps Lib. Docker plugin is disabled ({})".format(e))
27			else:
28			import_docker_error_tag = False
29
30
31			class DockerStatsFetcher:
32			MANDATORY_MEMORY_FIELDS = ['usage', 'limit']
33
34			def __init__(self, container):
35			self._container = container
36
37			# Previous computes stats are stored in the self._old_computed_stats variable
38			# We store time data to enable IoR/s & IoW/s calculations to avoid complexity for consumers of the APIs exposed.
39			self._old_computed_stats = {}
40
41			# Last time when output stats (results) were computed
42			self._last_stats_computed_time = 0
43
44			# Threaded Streamer
45			stats_iterable = container.stats(decode=True)
46			self._streamer = StatsStreamer(stats_iterable, initial_stream_value={})
47
48			def _log_debug(self, msg, exception=None):
49			logger.debug("containers (Docker) ID: {} - {} ({}) ".format(self._container.id, msg, exception))
50			logger.debug(self._streamer.stats)
51
52			def stop(self):
53			self._streamer.stop()
54
55			@property
56			def activity_stats(self):
57			"""Activity Stats
58
59			Each successive access of activity_stats will cause computation of activity_stats
60			"""
61			computed_activity_stats = self._compute_activity_stats()
62			self._old_computed_stats = computed_activity_stats
63			self._last_stats_computed_time = time.time()
64			return computed_activity_stats
65
66			def _compute_activity_stats(self):
67			with self._streamer.result_lock:
68			io_stats = self._get_io_stats()
69			cpu_stats = self._get_cpu_stats()
70			memory_stats = self._get_memory_stats()
71			network_stats = self._get_network_stats()
72
73			computed_stats = {
74			"io": io_stats or {},
75			"memory": memory_stats or {},
76			"network": network_stats or {},
77			"cpu": cpu_stats or {"total": 0.0},
78			}
79			return computed_stats
80
81			@property
82			def time_since_update(self):
83			# In case no update, default to 1
84			return max(1, self._streamer.last_update_time - self._last_stats_computed_time)
85
86			def _get_cpu_stats(self):
87			"""Return the container CPU usage.
88
89			Output: a dict {'total': 1.49}
90			"""
91			stats = {'total': 0.0}
92
93			try:
94			cpu_stats = self._streamer.stats['cpu_stats']
95			precpu_stats = self._streamer.stats['precpu_stats']
96			cpu = {'system': cpu_stats['system_cpu_usage'], 'total': cpu_stats['cpu_usage']['total_usage']}
97			precpu = {'system': precpu_stats['system_cpu_usage'], 'total': precpu_stats['cpu_usage']['total_usage']}
98
99			# Issue #1857
100			# If either precpu_stats.online_cpus or cpu_stats.online_cpus is nil
101			# then for compatibility with older daemons the length of
102			# the corresponding cpu_usage.percpu_usage array should be used.
103			cpu['nb_core'] = cpu_stats.get('online_cpus') or len(cpu_stats['cpu_usage']['percpu_usage'] or [])
104			except KeyError as e:
105			self._log_debug("Can't grab CPU stats", e)
106			return None
107
108			try:
109			cpu_delta = cpu['total'] - precpu['total']
110			system_cpu_delta = cpu['system'] - precpu['system']
111			# CPU usage % = (cpu_delta / system_cpu_delta) * number_cpus * 100.0
112			stats['total'] = (cpu_delta / system_cpu_delta) * cpu['nb_core'] * 100.0
113			except TypeError as e:
114			self._log_debug("Can't compute CPU usage", e)
115			return None
116
117			# Return the stats
118			return stats
119
120			def _get_memory_stats(self):
121			"""Return the container MEMORY.
122
123			Output: a dict {'usage': ..., 'limit': ..., 'inactive_file': ...}
124
125			Note:the displayed memory usage is 'usage - inactive_file'
126			"""
127			memory_stats = self._streamer.stats.get('memory_stats')
128
129			# Checks for memory_stats & mandatory fields
130			if not memory_stats or any(field not in memory_stats for field in self.MANDATORY_MEMORY_FIELDS):
131			self._log_debug("Missing MEM usage fields")
132			return None
133
134			stats = {field: memory_stats[field] for field in self.MANDATORY_MEMORY_FIELDS}
135
136			# Optional field stats: inactive_file
137			if memory_stats.get('stats', {}).get('inactive_file') is not None:
138			stats['inactive_file'] = memory_stats['stats']['inactive_file']
139
140			# Return the stats
141			return stats
142
143			def _get_network_stats(self):
144			"""Return the container network usage using the Docker API (v1.0 or higher).
145
146			Output: a dict {'time_since_update': 3000, 'rx': 10, 'tx': 65}.
147			with:
148			time_since_update: number of seconds elapsed between the latest grab
149			rx: Number of bytes received
150			tx: Number of bytes transmitted
151			"""
152			eth0_stats = self._streamer.stats.get('networks', {}).get('eth0')
153
154			# Checks for net_stats & mandatory fields
155			if not eth0_stats or any(field not in eth0_stats for field in ['rx_bytes', 'tx_bytes']):
156			self._log_debug("Missing Network usage fields")
157			return None
158
159			# Read the rx/tx stats (in bytes)
160			stats = {'cumulative_rx': eth0_stats["rx_bytes"], 'cumulative_tx': eth0_stats["tx_bytes"]}
161
162			# Using previous stats to calculate rates
163			old_network_stats = self._old_computed_stats.get("network")
164			if old_network_stats:
165			stats['time_since_update'] = round(self.time_since_update)
166			stats['rx'] = stats['cumulative_rx'] - old_network_stats["cumulative_rx"]
167			stats['tx'] = stats['cumulative_tx'] - old_network_stats['cumulative_tx']
168
169			# Return the stats
170			return stats
171
172			def _get_io_stats(self):
173			"""Return the container IO usage using the Docker API (v1.0 or higher).
174
175			Output: a dict {'time_since_update': 3000, 'ior': 10, 'iow': 65}.
176			with:
177			time_since_update: number of seconds elapsed between the latest grab
178			ior: Number of bytes read
179			iow: Number of bytes written
180			"""
181			io_service_bytes_recursive = self._streamer.stats.get('blkio_stats', {}).get('io_service_bytes_recursive')
182
183			# Checks for net_stats
184			if not io_service_bytes_recursive:
185			self._log_debug("Missing blockIO usage fields")
186			return None
187
188			# Read the ior/iow stats (in bytes)
189			try:
190			# Read IOR and IOW value in the structure list of dict
191			cumulative_ior = [i for i in io_service_bytes_recursive if i['op'].lower() == 'read'][0]['value']
192			cumulative_iow = [i for i in io_service_bytes_recursive if i['op'].lower() == 'write'][0]['value']
193			except (TypeError, IndexError, KeyError, AttributeError) as e:
194			self._log_debug("Can't grab blockIO usage", e) # stats do not have io information
195			return None
196
197			stats = {'cumulative_ior': cumulative_ior, 'cumulative_iow': cumulative_iow}
198
199			# Using previous stats to calculate difference
200			old_io_stats = self._old_computed_stats.get("io")
201			if old_io_stats:
202			stats['time_since_update'] = round(self.time_since_update)
203			stats['ior'] = stats['cumulative_ior'] - old_io_stats["cumulative_ior"]
204			stats['iow'] = stats['cumulative_iow'] - old_io_stats["cumulative_iow"]
205
206			# Return the stats
207			return stats
208
209
210			class DockerContainersExtension:
211			"""Glances' Containers Plugin's Docker Extension unit"""
212
213			CONTAINER_ACTIVE_STATUS = ['running', 'paused']
214
215			def __init__(self):
216			if import_docker_error_tag:
217			raise Exception("Missing libs required to run Docker Extension (Containers) ")
218
219			self.client = None
220			self.ext_name = "containers (Docker)"
221			self.stats_fetchers = {}
222
223			self.connect()
224
225			def connect(self):
226			"""Connect to the Docker server."""
227			# Init the Docker API Client
228			try:
229			# Do not use the timeout option (see issue #1878)
230			self.client = docker.from_env()
231			except Exception as e:
232			logger.error("{} plugin - Can't connect to Docker ({})".format(self.ext_name, e))
233			self.client = None
234
235			def update_version(self):
236			# Long and not useful anymore because the information is no more displayed in UIs
237			# return self.client.version()
238			return {}
239
240			def stop(self):
241			# Stop all streaming threads
242			for t in itervalues(self.stats_fetchers):
243			t.stop()
244
245			def update(self, all_tag):
246			"""Update Docker stats using the input method."""
247
248			if not self.client:
249			return {}, []
250
251			version_stats = self.update_version()
252
253			# Update current containers list
254			try:
255			# Issue #1152: Docker module doesn't export details about stopped containers
256			# The Containers/all key of the configuration file should be set to True
257			containers = self.client.containers.list(all=all_tag)
258			except Exception as e:
259			logger.error("{} plugin - Can't get containers list ({})".format(self.ext_name, e))
260			return version_stats, []
261
262			# Start new thread for new container
263			for container in containers:
264			if container.id not in self.stats_fetchers:
265			# StatsFetcher did not exist in the internal dict
266			# Create it, add it to the internal dict
267			logger.debug("{} plugin - Create thread for container {}".format(self.ext_name, container.id[:12]))
268			self.stats_fetchers[container.id] = DockerStatsFetcher(container)
269
270			# Stop threads for non-existing containers
271			absent_containers = set(iterkeys(self.stats_fetchers)) - set(c.id for c in containers)
272			for container_id in absent_containers:
273			# Stop the StatsFetcher
274			logger.debug("{} plugin - Stop thread for old container {}".format(self.ext_name, container_id[:12]))
275			self.stats_fetchers[container_id].stop()
276			# Delete the StatsFetcher from the dict
277			del self.stats_fetchers[container_id]
278
279			# Get stats for all containers
280			container_stats = [self.generate_stats(container) for container in containers]
281			return version_stats, container_stats
282
283			@property
284			def key(self):
285			"""Return the key of the list."""
286			return 'name'
287
288			def generate_stats(self, container):
289			# Init the stats for the current container
290			stats = {
291			'key': self.key,
292			# Export name
293			'name': nativestr(container.name),
294			# Container Id
295			'id': container.id,
296			# Container Status (from attrs)
297			'status': container.attrs['State']['Status'],
298			'created': container.attrs['Created'],
299			'command': [],
300			}
301
302			# Container Image
303			try:
304			# API fails on Unraid - See issue 2233
305			stats['image'] = (','.join(container.image.tags if container.image.tags else []),)
306			except requests.exceptions.HTTPError:
307			stats['image'] = ''
308
309			if container.attrs['Config'].get('Entrypoint', None):
310			stats['command'].extend(container.attrs['Config'].get('Entrypoint', []))
311			if container.attrs['Config'].get('Cmd', None):
312			stats['command'].extend(container.attrs['Config'].get('Cmd', []))
313			if not stats['command']:
314			stats['command'] = None
315
316			if stats['status'] in self.CONTAINER_ACTIVE_STATUS:
317			started_at = container.attrs['State']['StartedAt']
318			stats_fetcher = self.stats_fetchers[container.id]
319			activity_stats = stats_fetcher.activity_stats
320			stats.update(activity_stats)
321
322			# Additional fields
323			stats['cpu_percent'] = stats["cpu"]['total']
324			stats['memory_usage'] = stats["memory"].get('usage')
325			if stats['memory'].get('cache') is not None:
326			stats['memory_usage'] -= stats['memory']['cache']
327			if 'time_since_update' in stats['io']:
328			stats['io_rx'] = stats['io'].get('ior') // stats['io'].get('time_since_update')
329			stats['io_wx'] = stats['io'].get('iow') // stats['io'].get('time_since_update')
330			if 'time_since_update' in stats['network']:
331			stats['network_rx'] = stats['network'].get('rx') // stats['network'].get('time_since_update')
332			stats['network_tx'] = stats['network'].get('tx') // stats['network'].get('time_since_update')
333			stats['uptime'] = pretty_date(parser.parse(started_at).astimezone(tz.tzlocal()).replace(tzinfo=None))
334			# Manage special chars in command (see isse#2733)
335			stats['command'] = replace_special_chars(' '.join(stats['command']))
336			else:
337			stats['io'] = {}
338			stats['cpu'] = {}
339			stats['memory'] = {}
340			stats['network'] = {}
341			stats['io_rx'] = None
342			stats['io_wx'] = None
343			stats['cpu_percent'] = None
344			stats['memory_percent'] = None
345			stats['network_rx'] = None
346			stats['network_tx'] = None
347			stats['uptime'] = None
348
349			return stats
350

nicolargo / glances

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DockerStatsFetcher._get_cpu_stats() A

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