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
|
import functools
from time import sleep, time
from subprocess import (
CalledProcessError,
check_call,
check_output
)
from charmhelpers.core.hookenv import (
resource_get,
config,
log,
ERROR,
)
config = config()
DOCKER_PACKAGES = ["docker.engine"]
DOCKER_CLI = "/usr/bin/docker"
def retry(f=None, timeout=10, delay=2):
"""Retry decorator.
Provides a decorator that can be used to retry a function if it raises
an exception.
:param timeout: timeout in seconds (default 10)
:param delay: retry delay in seconds (default 2)
Examples::
# retry fetch_url function
@retry
def fetch_url():
# fetch url
# retry fetch_url function for 60 secs
@retry(timeout=60)
def fetch_url():
# fetch url
"""
if not f:
return functools.partial(retry, timeout=timeout, delay=delay)
@functools.wraps(f)
def func(*args, **kwargs):
start = time()
error = None
while True:
try:
return f(*args, **kwargs)
except Exception as e:
error = e
elapsed = time() - start
if elapsed >= timeout:
raise error
remaining = timeout - elapsed
sleep(delay if delay <= remaining else remaining)
return func
# NOTE: this code assumes that name of container is the part of the
# name of docker image
def add_docker_repo():
import platform
cmd = 'curl -fsSL https://apt.dockerproject.org/gpg | sudo apt-key add -'
check_output(cmd, shell=True)
dist = platform.linux_distribution()[2].strip()
cmd = "add-apt-repository " + \
"\"deb https://apt.dockerproject.org/repo/ " + \
"ubuntu-%s " % (dist) + \
"main\""
check_output(cmd, shell=True)
def is_container_launched(name):
# NOTE: 'paused' state is not getting into account if someone paused it
# NOTE: assume that this cmd is the same as inspect of state:
# [DOCKER_CLI, "inspect", "-f", "{{.State.Running}}", name]
cmd = DOCKER_CLI + ' ps | grep -w ' + name
try:
check_output(cmd, shell=True)
return True
except CalledProcessError:
return False
def is_container_present(name):
cmd = DOCKER_CLI + ' ps --all | grep -w ' + name
try:
check_output(cmd, shell=True)
return True
except CalledProcessError:
return False
def dpkg_version(name, pkg):
try:
return check_output([DOCKER_CLI,
"exec",
name,
"dpkg-query",
"-f", "${Version}\\n", "-W", pkg]).rstrip()
except CalledProcessError:
return None
def load_docker_image(name):
img_path = resource_get(name)
if not img_path:
return None
image_id = get_docker_image_id(name)
if image_id:
# remove previous image
check_call([DOCKER_CLI, "rmi", image_id])
check_call([DOCKER_CLI, "load", "-i", img_path])
return get_docker_image_id(name)
def get_docker_image_id(name):
try:
output = check_output(DOCKER_CLI + ' images | grep -w ' + name,
shell=True)
except CalledProcessError:
return None
output = output.decode('UTF-8').split('\n')
for line in output:
parts = line.split()
if name in parts[0]:
return parts[2].strip()
return None
def launch_docker_image(name, additional_args=[]):
image_id = get_docker_image_id(name)
if not image_id:
log(name + " docker image is not available", level=ERROR)
return
orchestrator = config.get("cloud_orchestrator")
args = [DOCKER_CLI,
"run",
"--net=host",
"--cap-add=AUDIT_WRITE",
"--privileged",
"--restart=unless-stopped",
"--env='CLOUD_ORCHESTRATOR=%s'" % (orchestrator),
"--volume=/etc/contrailctl:/etc/contrailctl",
"--name=%s" % name]
args.extend(additional_args)
args.extend(["-itd", image_id])
log("Run container with cmd: " + ' '.join(args))
check_call(args)
def docker_cp(name, src, dst):
check_call([DOCKER_CLI, "cp", name + ":" + src, dst])
def docker_exec(name, cmd):
cli = [DOCKER_CLI, "exec", name]
if isinstance(cmd, list):
cli.extend(cmd)
else:
cli.append(cmd)
output = check_output(cli)
return output.decode('UTF-8')
@retry(timeout=32, delay=10)
def apply_config_in_container(name, cfg_name):
try:
cmd = (DOCKER_CLI + ' exec ' + name + ' contrailctl config sync -v'
+ ' -c ' + cfg_name)
check_call(cmd, shell=True)
return True
except CalledProcessError as e:
if e.returncode == 137:
log("Container was restarted. " + str(e.output), level=ERROR)
return False
raise
|
