1
|
|
|
# -*- coding: utf-8 -*- |
2
|
|
|
# |
3
|
|
|
# This file is part of Glances. |
4
|
|
|
# |
5
|
|
|
# SPDX-FileCopyrightText: 2022 Nicolas Hennion <[email protected]> |
6
|
|
|
# |
7
|
|
|
# SPDX-License-Identifier: LGPL-3.0-only |
8
|
|
|
# |
9
|
|
|
|
10
|
|
|
"""Disk I/O plugin.""" |
11
|
|
|
from __future__ import unicode_literals |
12
|
|
|
|
13
|
|
|
from glances.compat import nativestr, n |
14
|
|
|
from glances.timer import getTimeSinceLastUpdate |
15
|
|
|
from glances.plugins.glances_plugin import GlancesPlugin |
16
|
|
|
|
17
|
|
|
import psutil |
18
|
|
|
|
19
|
|
|
|
20
|
|
|
# Define the history items list |
21
|
|
|
items_history_list = [ |
22
|
|
|
{'name': 'read_bytes', 'description': 'Bytes read per second', 'y_unit': 'B/s'}, |
23
|
|
|
{'name': 'write_bytes', 'description': 'Bytes write per second', 'y_unit': 'B/s'}, |
24
|
|
|
] |
25
|
|
|
|
26
|
|
|
|
27
|
|
|
class Plugin(GlancesPlugin): |
28
|
|
|
"""Glances disks I/O plugin. |
29
|
|
|
|
30
|
|
|
stats is a list |
31
|
|
|
""" |
32
|
|
|
|
33
|
|
View Code Duplication |
def __init__(self, args=None, config=None): |
|
|
|
|
34
|
|
|
"""Init the plugin.""" |
35
|
|
|
super(Plugin, self).__init__( |
36
|
|
|
args=args, config=config, items_history_list=items_history_list, stats_init_value=[] |
37
|
|
|
) |
38
|
|
|
|
39
|
|
|
# We want to display the stat in the curse interface |
40
|
|
|
self.display_curse = True |
41
|
|
|
|
42
|
|
|
# Hide stats if it has never been != 0 |
43
|
|
|
if config is not None: |
44
|
|
|
self.hide_zero = config.get_bool_value(self.plugin_name, 'hide_zero', default=False) |
45
|
|
|
else: |
46
|
|
|
self.hide_zero = False |
47
|
|
|
self.hide_zero_fields = ['read_bytes', 'write_bytes'] |
48
|
|
|
|
49
|
|
|
# Force a first update because we need two update to have the first stat |
50
|
|
|
self.update() |
51
|
|
|
self.refresh_timer.set(0) |
52
|
|
|
|
53
|
|
|
def get_key(self): |
54
|
|
|
"""Return the key of the list.""" |
55
|
|
|
return 'disk_name' |
56
|
|
|
|
57
|
|
|
@GlancesPlugin._check_decorator |
58
|
|
|
@GlancesPlugin._log_result_decorator |
59
|
|
|
def update(self): |
60
|
|
|
"""Update disk I/O stats using the input method.""" |
61
|
|
|
# Init new stats |
62
|
|
|
stats = self.get_init_value() |
63
|
|
|
|
64
|
|
|
if self.input_method == 'local': |
65
|
|
|
# Update stats using the standard system lib |
66
|
|
|
# Grab the stat using the psutil disk_io_counters method |
67
|
|
|
# read_count: number of reads |
68
|
|
|
# write_count: number of writes |
69
|
|
|
# read_bytes: number of bytes read |
70
|
|
|
# write_bytes: number of bytes written |
71
|
|
|
# read_time: time spent reading from disk (in milliseconds) |
72
|
|
|
# write_time: time spent writing to disk (in milliseconds) |
73
|
|
|
try: |
74
|
|
|
diskio = psutil.disk_io_counters(perdisk=True) |
75
|
|
|
except Exception: |
76
|
|
|
return stats |
77
|
|
|
|
78
|
|
|
# Previous disk IO stats are stored in the diskio_old variable |
79
|
|
|
# By storing time data we enable Rx/s and Tx/s calculations in the |
80
|
|
|
# XML/RPC API, which would otherwise be overly difficult work |
81
|
|
|
# for users of the API |
82
|
|
|
time_since_update = getTimeSinceLastUpdate('disk') |
83
|
|
|
|
84
|
|
|
diskio = diskio |
85
|
|
|
for disk in diskio: |
86
|
|
|
# By default, RamFS is not displayed (issue #714) |
87
|
|
|
if self.args is not None and not self.args.diskio_show_ramfs and disk.startswith('ram'): |
88
|
|
|
continue |
89
|
|
|
|
90
|
|
|
# Shall we display the stats ? |
91
|
|
|
if not self.is_display(disk): |
92
|
|
|
continue |
93
|
|
|
|
94
|
|
|
# Compute count and bit rate |
95
|
|
|
try: |
96
|
|
|
diskstat = { |
97
|
|
|
'time_since_update': time_since_update, |
98
|
|
|
'disk_name': n(disk), |
99
|
|
|
'read_count': diskio[disk].read_count - self.diskio_old[disk].read_count, |
100
|
|
|
'write_count': diskio[disk].write_count - self.diskio_old[disk].write_count, |
101
|
|
|
'read_bytes': diskio[disk].read_bytes - self.diskio_old[disk].read_bytes, |
102
|
|
|
'write_bytes': diskio[disk].write_bytes - self.diskio_old[disk].write_bytes, |
103
|
|
|
} |
104
|
|
|
except (KeyError, AttributeError): |
105
|
|
|
diskstat = { |
106
|
|
|
'time_since_update': time_since_update, |
107
|
|
|
'disk_name': n(disk), |
108
|
|
|
'read_count': 0, |
109
|
|
|
'write_count': 0, |
110
|
|
|
'read_bytes': 0, |
111
|
|
|
'write_bytes': 0, |
112
|
|
|
} |
113
|
|
|
|
114
|
|
|
# Add alias if exist (define in the configuration file) |
115
|
|
|
if self.has_alias(disk) is not None: |
116
|
|
|
diskstat['alias'] = self.has_alias(disk) |
117
|
|
|
|
118
|
|
|
# Add the dict key |
119
|
|
|
diskstat['key'] = self.get_key() |
120
|
|
|
|
121
|
|
|
# Add the current disk stat to the list |
122
|
|
|
stats.append(diskstat) |
123
|
|
|
|
124
|
|
|
# Save stats to compute next bitrate |
125
|
|
|
try: |
126
|
|
|
self.diskio_old = diskio |
127
|
|
|
except (IOError, UnboundLocalError): |
128
|
|
|
pass |
129
|
|
|
elif self.input_method == 'snmp': |
130
|
|
|
# Update stats using SNMP |
131
|
|
|
# No standard way for the moment... |
132
|
|
|
pass |
133
|
|
|
|
134
|
|
|
# Update the stats |
135
|
|
|
self.stats = stats |
136
|
|
|
|
137
|
|
|
return self.stats |
138
|
|
|
|
139
|
|
|
def update_views(self): |
140
|
|
|
"""Update stats views.""" |
141
|
|
|
# Call the father's method |
142
|
|
|
super(Plugin, self).update_views() |
143
|
|
|
|
144
|
|
|
# Check if the stats should be hidden |
145
|
|
|
self.update_views_hidden() |
146
|
|
|
|
147
|
|
|
# Add specifics information |
148
|
|
|
# Alert |
149
|
|
|
for i in self.get_raw(): |
150
|
|
|
disk_real_name = i['disk_name'] |
151
|
|
|
self.views[i[self.get_key()]]['read_bytes']['decoration'] = self.get_alert( |
152
|
|
|
int(i['read_bytes'] // i['time_since_update']), header=disk_real_name + '_rx' |
153
|
|
|
) |
154
|
|
|
self.views[i[self.get_key()]]['write_bytes']['decoration'] = self.get_alert( |
155
|
|
|
int(i['write_bytes'] // i['time_since_update']), header=disk_real_name + '_tx' |
156
|
|
|
) |
157
|
|
|
|
158
|
|
|
def msg_curse(self, args=None, max_width=None): |
159
|
|
|
"""Return the dict to display in the curse interface.""" |
160
|
|
|
# Init the return message |
161
|
|
|
ret = [] |
162
|
|
|
|
163
|
|
|
# Only process if stats exist and display plugin enable... |
164
|
|
|
if not self.stats or self.is_disabled(): |
165
|
|
|
return ret |
166
|
|
|
|
167
|
|
|
# Max size for the interface name |
168
|
|
|
name_max_width = max_width - 13 |
169
|
|
|
|
170
|
|
|
# Header |
171
|
|
|
msg = '{:{width}}'.format('DISK I/O', width=name_max_width) |
172
|
|
|
ret.append(self.curse_add_line(msg, "TITLE")) |
173
|
|
|
if args.diskio_iops: |
174
|
|
|
msg = '{:>8}'.format('IOR/s') |
175
|
|
|
ret.append(self.curse_add_line(msg)) |
176
|
|
|
msg = '{:>7}'.format('IOW/s') |
177
|
|
|
ret.append(self.curse_add_line(msg)) |
178
|
|
|
else: |
179
|
|
|
msg = '{:>8}'.format('R/s') |
180
|
|
|
ret.append(self.curse_add_line(msg)) |
181
|
|
|
msg = '{:>7}'.format('W/s') |
182
|
|
|
ret.append(self.curse_add_line(msg)) |
183
|
|
|
# Disk list (sorted by name) |
184
|
|
|
for i in self.sorted_stats(): |
185
|
|
|
# Hide stats if never be different from 0 (issue #1787) |
186
|
|
|
if all([self.get_views(item=i[self.get_key()], key=f, option='hidden') for f in self.hide_zero_fields]): |
187
|
|
|
continue |
188
|
|
|
# Is there an alias for the disk name ? |
189
|
|
|
disk_name = self.has_alias(i['disk_name']) if self.has_alias(i['disk_name']) else i['disk_name'] |
190
|
|
|
# New line |
191
|
|
|
ret.append(self.curse_new_line()) |
192
|
|
|
if len(disk_name) > name_max_width: |
193
|
|
|
# Cut disk name if it is too long |
194
|
|
|
disk_name = '_' + disk_name[-name_max_width + 1 :] |
195
|
|
|
msg = '{:{width}}'.format(nativestr(disk_name), width=name_max_width + 1) |
196
|
|
|
ret.append(self.curse_add_line(msg)) |
197
|
|
|
if args.diskio_iops: |
198
|
|
|
# count |
199
|
|
|
txps = self.auto_unit(int(i['read_count'] // i['time_since_update'])) |
200
|
|
|
rxps = self.auto_unit(int(i['write_count'] // i['time_since_update'])) |
201
|
|
|
msg = '{:>7}'.format(txps) |
202
|
|
|
ret.append( |
203
|
|
|
self.curse_add_line( |
204
|
|
|
msg, self.get_views(item=i[self.get_key()], key='read_count', option='decoration') |
205
|
|
|
) |
206
|
|
|
) |
207
|
|
|
msg = '{:>7}'.format(rxps) |
208
|
|
|
ret.append( |
209
|
|
|
self.curse_add_line( |
210
|
|
|
msg, self.get_views(item=i[self.get_key()], key='write_count', option='decoration') |
211
|
|
|
) |
212
|
|
|
) |
213
|
|
|
else: |
214
|
|
|
# Bitrate |
215
|
|
|
txps = self.auto_unit(int(i['read_bytes'] // i['time_since_update'])) |
216
|
|
|
rxps = self.auto_unit(int(i['write_bytes'] // i['time_since_update'])) |
217
|
|
|
msg = '{:>7}'.format(txps) |
218
|
|
|
ret.append( |
219
|
|
|
self.curse_add_line( |
220
|
|
|
msg, self.get_views(item=i[self.get_key()], key='read_bytes', option='decoration') |
221
|
|
|
) |
222
|
|
|
) |
223
|
|
|
msg = '{:>7}'.format(rxps) |
224
|
|
|
ret.append( |
225
|
|
|
self.curse_add_line( |
226
|
|
|
msg, self.get_views(item=i[self.get_key()], key='write_bytes', option='decoration') |
227
|
|
|
) |
228
|
|
|
) |
229
|
|
|
|
230
|
|
|
return ret |
231
|
|
|
|