summaryrefslogtreecommitdiffstats
path: root/baro_tests/config_server.py
blob: 358a8ffeb60bbb8e92afefbedd50b339abbfbf26 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
"""Classes used by client.py"""
# -*- coding: utf-8 -*-

#Licensed under the Apache License, Version 2.0 (the "License"); you may
# not use this file except in compliance with the License. You may obtain
# a copy of the License at
#
#      http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
# License for the specific language governing permissions and limitations
# under the License.

import paramiko
import time
import string
import os.path

ID_RSA_PATH = '/home/opnfv/.ssh/id_rsa'
SSH_KEYS_SCRIPT = '/home/opnfv/barometer/baro_utils/get_ssh_keys.sh'
DEF_PLUGIN_INTERVAL = 10
COLLECTD_CONF = '/etc/collectd/collectd.conf'
COLLECTD_CONF_DIR = '/etc/collectd/collectd.conf.d'


class Node(object):
    """Node configuration class"""
    def __init__(self, attrs):
        self.__id = int(attrs[0])
        self.__status = attrs[1]
        self.__name = attrs[2]
        self.__cluster = int(attrs[3]) if attrs[3] else None
        self.__ip = attrs[4]
        self.__mac = attrs[5]
        self.__roles = [x.strip(' ') for x in attrs[6].split(',')]
        self.__pending_roles = attrs[7]
        self.__online = int(attrs[8]) if attrs[3] and attrs[8]else None
        self.__group_id = int(attrs[9]) if attrs[3] else None

    def get_name(self):
        """Get node name"""
        return self.__name

    def get_id(self):
        """Get node ID"""
        return self.__id

    def get_ip(self):
        """Get node IP address"""
        return self.__ip

    def get_roles(self):
        """Get node roles"""
        return self.__roles


class ConfigServer(object):
    """Class to get env configuration"""
    def __init__(self, host, user, logger, passwd=None):
        self.__host = host
        self.__user = user
        self.__passwd = passwd
        self.__priv_key = None
        self.__nodes = list()
        self.__logger = logger

        self.__private_key_file = ID_RSA_PATH
        if not os.path.isfile(self.__private_key_file):
            self.__logger.error(
                "Private key file '{}' not found.".format(self.__private_key_file))
            raise IOError("Private key file '{}' not found.".format(self.__private_key_file))

        # get list of available nodes
        ssh, sftp = self.__open_sftp_session(self.__host, self.__user, self.__passwd)
        attempt = 1
        fuel_node_passed = False

        while (attempt <= 10) and not fuel_node_passed:
            stdin, stdout, stderr = ssh.exec_command("fuel node")
            stderr_lines = stderr.readlines()
            if stderr_lines:
                self.__logger.warning("'fuel node' command failed (try {}):".format(attempt))
                for line in stderr_lines:
                    self.__logger.debug(line.strip())
            else:
                fuel_node_passed = True
                if attempt > 1:
                    self.__logger.info("'fuel node' command passed (try {})".format(attempt))
            attempt += 1
        if not fuel_node_passed:
            self.__logger.error("'fuel node' command failed. This was the last try.")
            raise OSError("'fuel node' command failed. This was the last try.")
        node_table = stdout.readlines()\

        # skip table title and parse table values
        for entry in node_table[2:]:
            self.__nodes.append(Node([str(x.strip(' \n')) for x in entry.split('|')]))

    def get_controllers(self):
        """Get list of controllers"""
        return [node for node in self.__nodes if 'controller' in node.get_roles()]

    def get_computes(self):
        """Get list of computes"""
        return [node for node in self.__nodes if 'compute' in node.get_roles()]

    def get_nodes(self):
        """Get list of nodes"""
        return self.__nodes

    def __open_sftp_session(self, host, user, passwd=None):
        """Connect to given host.

        Keyword arguments:
        host -- host to connect
        user -- user to use
        passwd -- password to use

        Return tuple of SSH and SFTP client instances.
        """
        # create SSH client
        ssh = paramiko.SSHClient()
        ssh.set_missing_host_key_policy(paramiko.AutoAddPolicy())

        # try a direct access using password or private key
        if not passwd and not self.__priv_key:
            # get private key
            self.__priv_key = paramiko.RSAKey.from_private_key_file(self.__private_key_file)

        # connect to the server
        ssh.connect(host, username=user, password=passwd, pkey=self.__priv_key)
        sftp = ssh.open_sftp()

        # return SFTP client instance
        return ssh, sftp

    def get_plugin_interval(self, compute, plugin):
        """Find the plugin interval in collectd configuration.

        Keyword arguments:
        compute -- compute node instance
        plugin -- plug-in name

        If found, return interval value, otherwise the default value"""
        ssh, sftp = self.__open_sftp_session(compute.get_ip(), 'root')
        in_plugin = False
        plugin_name = ''
        default_interval = DEF_PLUGIN_INTERVAL
        config_files = [COLLECTD_CONF] \
            + [COLLECTD_CONF_DIR + '/' + conf_file for conf_file in sftp.listdir(COLLECTD_CONF_DIR)]
        for config_file in config_files:
            try:
                with sftp.open(config_file) as config:
                    for line in config.readlines():
                        words = line.split()
                        if len(words) > 1 and words[0] == '<LoadPlugin':
                            in_plugin = True
                            plugin_name = words[1].strip('">')
                        if words and words[0] == '</LoadPlugin>':
                            in_plugin = False
                        if words and words[0] == 'Interval':
                            if in_plugin and plugin_name == plugin:
                                return int(words[1])
                            if not in_plugin:
                                default_interval = int(words[1])
            except IOError:
                self.__logger.error("Could not open collectd.conf file.")
        return default_interval

    def get_plugin_config_values(self, compute, plugin, parameter):
        """Get parameter values from collectd config file.

        Keyword arguments:
        compute -- compute node instance
        plugin -- plug-in name
        parameter -- plug-in parameter

        Return list of found values."""
        ssh, sftp = self.__open_sftp_session(compute.get_ip(), 'root')
        # find the plugin value
        in_plugin = False
        plugin_name = ''
        default_values = []
        config_files = [COLLECTD_CONF] \
            + [COLLECTD_CONF_DIR + '/' + conf_file for conf_file in sftp.listdir(COLLECTD_CONF_DIR)]
        for config_file in config_files:
            try:
                with sftp.open(config_file) as config:
                    for line in config.readlines():
                        words = line.split()
                        if len(words) > 1 and words[0] == '<Plugin':
                            in_plugin = True
                            plugin_name = words[1].strip('">')
                        if len(words) > 0 and words[0] == '</Plugin>':
                            in_plugin = False
                        if len(words) > 0 and words[0] == parameter:
                            if in_plugin and plugin_name == plugin:
                                return [word.strip('"') for word in words[1:]]
            except IOError:
                self.__logger.error("Could not open collectd.conf file.")
        return default_values

    def execute_command(self, command, host_ip=None, ssh=None):
        """Execute command on node and return list of lines of standard output.

        Keyword arguments:
        command -- command
        host_ip -- IP of the node
        ssh -- existing open SSH session to use

        One of host_ip or ssh must not be None. If both are not None, existing ssh session is used.
        """
        if host_ip is None and ssh is None:
            raise ValueError('One of host_ip or ssh must not be None.')
        if ssh is None:
            ssh, sftp = self.__open_sftp_session(host_ip, 'root')
        stdin, stdout, stderr = ssh.exec_command(command)
        return stdout.readlines()

    def get_ovs_interfaces(self, compute):
        """Get list of configured OVS interfaces

        Keyword arguments:
        compute -- compute node instance
        """
        stdout = self.execute_command("ovs-vsctl list-br", compute.get_ip())
        return [interface.strip() for interface in stdout]

    def is_ceilometer_running(self, controller):
        """Check whether Ceilometer is running on controller.

        Keyword arguments:
        controller -- controller node instance

        Return boolean value whether Ceilometer is running.
        """
        lines = self.execute_command('service --status-all | grep ceilometer', controller.get_ip())
        agent = False
        collector = False
        for line in lines:
            if '[ + ]  ceilometer-agent-notification' in line:
                agent = True
            if '[ + ]  ceilometer-collector' in line:
                collector = True
        return agent and collector

    def is_installed(self, compute, package):
        """Check whether package exists on compute node.

        Keyword arguments:
        compute -- compute node instance
        package -- Linux package to search for

        Return boolean value whether package is installed.
        """
        stdout = self.execute_command('dpkg -l | grep {}'.format(package), compute.get_ip())
        return len(stdout) > 0

    def check_ceil_plugin_included(self, compute):
        """Check if ceilometer plugin is included in collectd.conf file If not,
        try to enable it.

        Keyword arguments:
        compute -- compute node instance

        Return boolean value whether ceilometer plugin is included or it's enabling was successful.
        """
        ssh, sftp = self.__open_sftp_session(compute.get_ip(), 'root')
        try:
            config = sftp.open(COLLECTD_CONF, mode='r')
        except IOError:
            self.__logger.error(
                'Cannot open {} on node {}'.format(COLLECTD_CONF, compute.get_id()))
            return False
        in_lines = config.readlines()
        out_lines = in_lines[:]
        include_section_indexes = [
            (start, end) for start in range(len(in_lines)) for end in range(len(in_lines))
            if (start < end)
            and '<Include' in in_lines[start]
            and COLLECTD_CONF_DIR in in_lines[start]
            and '#' not in in_lines[start]
            and '</Include>' in in_lines[end]
            and '#' not in in_lines[end]
            and len([i for i in in_lines[start + 1: end]
                if 'Filter' in i and '*.conf' in i and '#' not in i]) > 0]
        if len(include_section_indexes) == 0:
            out_lines.append('<Include "{}">\n'.format(COLLECTD_CONF_DIR))
            out_lines.append('        Filter "*.conf"\n')
            out_lines.append('</Include>\n')
            config.close()
            config = sftp.open(COLLECTD_CONF, mode='w')
            config.writelines(out_lines)
        config.close()
        self.__logger.info('Creating backup of collectd.conf...')
        config = sftp.open(COLLECTD_CONF + '.backup', mode='w')
        config.writelines(in_lines)
        config.close()
        return True

    def enable_plugins(self, compute, plugins, error_plugins, create_backup=True):
        """Enable plugins on compute node

        Keyword arguments:
        compute -- compute node instance
        plugins -- list of plugins to be enabled
        error_plugins -- list of tuples with found errors, new entries may be added there
            (plugin, error_description, is_critical):
                plugin -- plug-in name
                error_decription -- description of the error
                is_critical -- boolean value indicating whether error is critical
        create_backup -- boolean value indicating whether backup shall be created

        Return boolean value indicating whether function was successful.
        """
        plugins = sorted(plugins)
        ssh, sftp = self.__open_sftp_session(compute.get_ip(), 'root')
        plugins_to_enable = plugins[:]
        for plugin in plugins:
            plugin_file = '/usr/lib/collectd/{}.so'.format(plugin)
            try:
                sftp.stat(plugin_file)
            except IOError:
                self.__logger.debug(
                    'Plugin file {0} not found on node {1}, plugin {2} will not be enabled'.format(
                        plugin_file, compute.get_id(), plugin))
                error_plugins.append((plugin, 'plugin file {} not found'.format(plugin_file), True))
                plugins_to_enable.remove(plugin)
        self.__logger.debug('Following plugins will be enabled on node {}: {}'.format(
            compute.get_id(), ', '.join(plugins_to_enable)))
        try:
            config = sftp.open(COLLECTD_CONF, mode='r')
        except IOError:
            self.__logger.warning(
                'Cannot open {} on node {}'.format(COLLECTD_CONF, compute.get_id()))
            return False
        in_lines = config.readlines()
        out_lines = []
        enabled_plugins = []
        enabled_sections = []
        in_section = 0
        comment_section = False
        uncomment_section = False
        for line in in_lines:
            if 'LoadPlugin' in line:
                for plugin in plugins_to_enable:
                    if plugin in line:
                        commented = '#' in line
                        #list of uncommented lines which contain LoadPlugin for this plugin
                        loadlines = [
                            ll for ll in in_lines if 'LoadPlugin' in ll
                            and plugin in ll and '#' not in ll]
                        if len(loadlines) == 0:
                            if plugin not in enabled_plugins:
                                line = line.lstrip(string.whitespace + '#')
                                enabled_plugins.append(plugin)
                                error_plugins.append((
                                    plugin, 'plugin not enabled in '
                                    + '{}, trying to enable it'.format(COLLECTD_CONF), False))
                        elif not commented:
                            if plugin not in enabled_plugins:
                                enabled_plugins.append(plugin)
                            else:
                                line = '#' + line
                                error_plugins.append((
                                    plugin, 'plugin enabled more than once '
                                    + '(additional occurrence of LoadPlugin found in '
                                    + '{}), trying to comment it out.'.format(
                                        COLLECTD_CONF), False))
            elif line.lstrip(string.whitespace + '#').find('<Plugin') == 0:
                in_section += 1
                for plugin in plugins_to_enable:
                    if plugin in line:
                        commented = '#' in line
                        #list of uncommented lines which contain Plugin for this plugin
                        pluginlines = [
                            pl for pl in in_lines if '<Plugin' in pl
                            and plugin in pl and '#' not in pl]
                        if len(pluginlines) == 0:
                            if plugin not in enabled_sections:
                                line = line[line.rfind('#') + 1:]
                                uncomment_section = True
                                enabled_sections.append(plugin)
                                error_plugins.append((
                                    plugin, 'plugin section found in '
                                    + '{}, but commented out, trying to uncomment it.'.format(
                                        COLLECTD_CONF), False))
                        elif not commented:
                            if plugin not in enabled_sections:
                                enabled_sections.append(plugin)
                            else:
                                line = '#' + line
                                comment_section = True
                                error_plugins.append((
                                    plugin,
                                    'additional occurrence of plugin section found in '
                                    + '{}, trying to comment it out.'.format(COLLECTD_CONF),
                                    False))
            elif in_section > 0:
                if comment_section and '#' not in line:
                    line = '#' + line
                if uncomment_section and '#' in line:
                    line = line[line.rfind('#') + 1:]
                if '</Plugin>' in line:
                    in_section -= 1
                    if in_section == 0:
                        comment_section = False
                        uncomment_section = False
            elif '</Plugin>' in line:
                self.__logger.error(
                    'Unexpected closure os plugin section on line'
                    + ' {} in collectd.conf, matching section start not found.'.format(
                        len(out_lines) + 1))
                return False
            out_lines.append(line)
        if in_section > 0:
            self.__logger.error(
                'Unexpected end of file collectd.conf, '
                + 'closure of last plugin section not found.')
            return False
        out_lines = [
            'LoadPlugin {}\n'.format(plugin) for plugin in plugins_to_enable
            if plugin not in enabled_plugins] + out_lines
        for plugin in plugins_to_enable:
            if plugin not in enabled_plugins:
                error_plugins.append((
                    plugin,
                    'plugin not enabled in {}, trying to enable it.'.format(COLLECTD_CONF),
                    False))
        unenabled_sections = [
            plugin for plugin in plugins_to_enable if plugin not in enabled_sections]
        if unenabled_sections:
            self.__logger.error('Plugin sections for following plugins not found: {}'.format(
                ', '.join(unenabled_sections)))
            return False

        config.close()
        if create_backup:
            self.__logger.info('Creating backup of collectd.conf...')
            config = sftp.open(COLLECTD_CONF + '.backup', mode='w')
            config.writelines(in_lines)
            config.close()
        self.__logger.info('Updating collectd.conf...')
        config = sftp.open(COLLECTD_CONF, mode='w')
        config.writelines(out_lines)
        config.close()
        diff_command = "diff {} {}.backup".format(COLLECTD_CONF, COLLECTD_CONF)
        stdin, stdout, stderr = ssh.exec_command(diff_command)
        self.__logger.debug(diff_command)
        for line in stdout.readlines():
            self.__logger.debug(line.strip())
        return True

    def restore_config(self, compute):
        """Restore collectd config file from backup on compute node.

        Keyword arguments:
        compute -- compute node instance
        """
        ssh, sftp = self.__open_sftp_session(compute.get_ip(), 'root')

        self.__logger.info('Restoring config file from backup...')
        ssh.exec_command("cp {0} {0}.used".format(COLLECTD_CONF))
        ssh.exec_command("cp {0}.backup {0}".format(COLLECTD_CONF))

    def restart_collectd(self, compute):
        """Restart collectd on compute node.

        Keyword arguments:
        compute -- compute node instance

        Retrun tuple with boolean indicating success and list of warnings received
        during collectd start.
        """

        def get_collectd_processes(ssh_session):
            """Get number of running collectd processes.

            Keyword arguments:
            ssh_session -- instance of SSH session in which to check for processes
            """
            stdin, stdout, stderr = ssh_session.exec_command("pgrep collectd")
            return len(stdout.readlines())

        ssh, sftp = self.__open_sftp_session(compute.get_ip(), 'root')

        self.__logger.info('Stopping collectd service...')
        stdout = self.execute_command("service collectd stop", ssh=ssh)
        time.sleep(10)
        if get_collectd_processes(ssh):
            self.__logger.error('Collectd is still running...')
            return False, []
        self.__logger.info('Starting collectd service...')
        stdout = self.execute_command("service collectd start", ssh=ssh)
        time.sleep(10)
        warning = [output.strip() for output in stdout if 'WARN: ' in output]
        if get_collectd_processes(ssh) == 0:
            self.__logger.error('Collectd is still not running...')
            return False, warning
        return True, warning