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
|
#!/usr/bin/env python
# Backup and restore a stack.
from __future__ import print_function
__metaclass__ = type
from argparse import ArgumentParser
import os
import re
import subprocess
import sys
from deploy_stack import (
destroy_environment,
dump_logs,
get_machine_dns_name,
)
from jujuconfig import translate_to_env
from jujupy import (
Environment,
format_listing,
until_timeout,
)
from utility import (
print_now,
wait_for_port,
)
backup_file_pattern = re.compile('(juju-backup-[0-9-]+\.tgz)')
running_instance_pattern = re.compile('\["([^"]+)"\]')
def setup_juju_path(juju_path):
"""Ensure the binaries and scripts under test are found first."""
full_path = os.path.abspath(juju_path)
if not os.path.isdir(full_path):
raise ValueError("The juju_path does not exist: %s" % full_path)
os.environ['PATH'] = '%s:%s' % (full_path, os.environ['PATH'])
sys.path.insert(0, full_path)
def deploy_stack(env, charm_prefix):
""""Deploy a simple stack, state-server and ubuntu."""
if charm_prefix and not charm_prefix.endswith('/'):
charm_prefix = charm_prefix + '/'
agent_version = env.get_matching_agent_version()
instance_id = env.get_status().status['machines']['0']['instance-id']
for ignored in until_timeout(30):
agent_versions = env.get_status().get_agent_versions()
if 'unknown' not in agent_versions and len(agent_versions) == 1:
break
if agent_versions.keys() != [agent_version]:
print_now("Current versions: %s" % ', '.join(agent_versions.keys()))
env.juju('upgrade-juju', '--version', agent_version)
env.wait_for_version(env.get_matching_agent_version())
env.juju('deploy', charm_prefix + 'ubuntu')
env.wait_for_started().status
print_now("%s is ready to testing" % env.environment)
return instance_id
def backup_state_server(env):
"""juju-backup provides a tarball."""
environ = dict(os.environ)
# juju-backup does not support the -e flag.
environ['JUJU_ENV'] = env.environment
output = subprocess.check_output(["juju-backup"], env=environ)
print_now(output)
match = backup_file_pattern.search(output)
if match is None:
raise Exception("The backup file was not found in output: %s" % output)
backup_file_name = match.group(1)
backup_file_path = os.path.abspath(backup_file_name)
print_now("State-Server backup at %s" % backup_file_path)
return backup_file_path
def restore_present_state_server(env, backup_file):
"""juju-restore wont restore when the state-server is still present."""
environ = dict(os.environ)
proc = subprocess.Popen(
["juju-restore", '-e', env.environment, backup_file], env=environ,
stdout=subprocess.PIPE, stderr=subprocess.PIPE)
output, err = proc.communicate()
if proc.returncode == 0:
raise Exception(
"juju-restore restored to an operational state-server: %s" % err)
else:
print_now(
"juju-restore correctly refused to restore "
"because the state-server was still up.")
match = running_instance_pattern.search(err)
if match is None:
raise Exception("The instance was not found in output above.")
instance_id = match.group(1)
return instance_id
def delete_instance(env, instance_id):
"""Delete the instance using the providers tools."""
print_now("Instrumenting a bootstrap node failure.")
provider_type = env.config.get('type')
if provider_type == 'ec2':
environ = dict(os.environ)
ec2_url = 'https://%s.ec2.amazonaws.com' % env.config['region']
environ['EC2_URL'] = ec2_url
environ['EC2_ACCESS_KEY'] = env.config['access-key']
environ['EC2_SECRET_KEY'] = env.config['secret-key']
command_args = ['euca-terminate-instances', instance_id]
elif provider_type == 'openstack':
environ = dict(os.environ)
environ.update(translate_to_env(env.config))
command_args = ['nova', 'delete', instance_id]
else:
raise ValueError(
"This test does not support the %s provider" % provider_type)
print_now("Deleting %s." % instance_id)
output = subprocess.check_output(command_args, env=environ)
print_now(output)
def delete_extra_state_servers(env, instance_id):
"""Delete the extra state-server instances."""
status = env.get_status()
for machine, info in status.iter_machines():
extra_instance_id = info.get('instance-id')
status = info.get('state-server-member-status')
if extra_instance_id != instance_id and status is not None:
print_now("Deleting state-server-member {}".format(machine))
host = get_machine_dns_name(env, machine)
delete_instance(env, extra_instance_id)
wait_for_state_server_to_shutdown(host, env, extra_instance_id)
def restore_missing_state_server(env, backup_file):
"""juju-restore creates a replacement state-server for the services."""
environ = dict(os.environ)
print_now("Starting restore.")
proc = subprocess.Popen(
['juju', '--show-log', 'restore', '-e', env.environment,
'--constraints', 'mem=2G', backup_file],
env=environ, stdout=subprocess.PIPE, stderr=subprocess.PIPE)
output, err = proc.communicate()
if proc.returncode != 0:
raise Exception("Restore failed: \n%s" % err)
print_now(output)
env.wait_for_started(600).status
print_now("%s restored" % env.environment)
print_now("PASS")
def wait_for_ha(env):
desired_state = 'has-vote'
for remaining in until_timeout(1200):
status = env.get_status()
states = {}
for machine, info in status.iter_machines():
status = info.get('state-server-member-status')
if status is None:
continue
states.setdefault(status, []).append(machine)
if states.keys() == [desired_state]:
return
print_now(format_listing(states, desired_state))
else:
raise Exception('Timed out waiting for voting to be enabled.')
def wait_for_state_server_to_shutdown(host, env, instance_id):
print_now("Waiting for port to close on %s" % host)
wait_for_port(host, 17070, closed=True)
print_now("Closed.")
provider_type = env.config.get('type')
if provider_type == 'openstack':
environ = dict(os.environ)
environ.update(translate_to_env(env.config))
for ignored in until_timeout(300):
output = subprocess.check_output(['nova', 'list'], env=environ)
if instance_id not in output:
print_now('{} was removed from nova list'.format(instance_id))
break
else:
raise Exception(
'{} was not deleted:\n{}'.format(instance_id, output))
def main():
parser = ArgumentParser('Test recovery strategies.')
parser.add_argument(
'--charm-prefix', help='A prefix for charm urls.', default='')
strategy = parser.add_argument_group('test strategy')
strategy.add_argument(
'--ha', action='store_const', dest='strategy', const='ha',
default='backup', help="Test HA.")
strategy.add_argument(
'--backup', action='store_const', dest='strategy', const='backup',
help="Test backup/restore.")
strategy.add_argument(
'--ha-backup', action='store_const', dest='strategy', const='ha-backup',
help="Test backup/restore of HA.")
parser.add_argument('juju_path')
parser.add_argument('env_name')
args = parser.parse_args()
try:
setup_juju_path(args.juju_path)
env = Environment.from_config(args.env_name)
env.bootstrap()
bootstrap_host = get_machine_dns_name(env, 0)
log_host = bootstrap_host
try:
instance_id = deploy_stack(env, args.charm_prefix)
if args.strategy in ('ha', 'ha-backup'):
env.juju('ensure-availability', '-n', '3')
wait_for_ha(env)
log_host = get_machine_dns_name(env, 3)
if args.strategy in ('ha-backup', 'backup'):
backup_file = backup_state_server(env)
restore_present_state_server(env, backup_file)
log_host = None
if args.strategy == 'ha-backup':
delete_extra_state_servers(env, instance_id)
delete_instance(env, instance_id)
wait_for_state_server_to_shutdown(bootstrap_host, env, instance_id)
if args.strategy == 'ha':
env.get_status(600)
else:
restore_missing_state_server(env, backup_file)
except:
if log_host is not None:
dump_logs(env, log_host,
os.path.join(os.environ['WORKSPACE'], 'artifacts'))
raise
finally:
destroy_environment(env)
except Exception as e:
print_now(e)
if getattr(e, 'output', None):
print_now(e.output)
print_now("FAIL")
sys.exit(1)
if __name__ == '__main__':
main()
|