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
|
# Copyright 2015 gRPC authors.
#
# 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.
"""Helpers to run docker instances as jobs."""
from __future__ import print_function
import json
import os
import subprocess
import sys
import tempfile
import time
import uuid
sys.path.append(os.path.dirname(os.path.abspath(__file__)))
import jobset
_DEVNULL = open(os.devnull, 'w')
def random_name(base_name):
"""Randomizes given base name."""
return '%s_%s' % (base_name, uuid.uuid4())
def docker_kill(cid):
"""Kills a docker container. Returns True if successful."""
return subprocess.call(['docker', 'kill', str(cid)],
stdin=subprocess.PIPE,
stdout=_DEVNULL,
stderr=subprocess.STDOUT) == 0
def docker_mapped_port(cid, port, timeout_seconds=15):
"""Get port mapped to internal given internal port for given container."""
started = time.time()
while time.time() - started < timeout_seconds:
try:
output = subprocess.check_output('docker port %s %s' % (cid, port),
stderr=_DEVNULL,
shell=True).decode()
return int(output.split(':', 2)[1])
except subprocess.CalledProcessError as e:
pass
raise Exception('Failed to get exposed port %s for container %s.' %
(port, cid))
def docker_ip_address(cid, timeout_seconds=15):
"""Get port mapped to internal given internal port for given container."""
started = time.time()
while time.time() - started < timeout_seconds:
cmd = 'docker inspect %s' % cid
try:
output = subprocess.check_output(cmd, stderr=_DEVNULL,
shell=True).decode()
json_info = json.loads(output)
assert len(json_info) == 1
out = json_info[0]['NetworkSettings']['IPAddress']
if not out:
continue
return out
except subprocess.CalledProcessError as e:
pass
raise Exception(
'Non-retryable error: Failed to get ip address of container %s.' % cid)
def wait_for_healthy(cid, shortname, timeout_seconds):
"""Wait timeout_seconds for the container to become healthy"""
started = time.time()
while time.time() - started < timeout_seconds:
try:
output = subprocess.check_output([
'docker', 'inspect', '--format="{{.State.Health.Status}}"', cid
],
stderr=_DEVNULL).decode()
if output.strip('\n') == 'healthy':
return
except subprocess.CalledProcessError as e:
pass
time.sleep(1)
raise Exception('Timed out waiting for %s (%s) to pass health check' %
(shortname, cid))
def finish_jobs(jobs, suppress_failure=True):
"""Kills given docker containers and waits for corresponding jobs to finish"""
for job in jobs:
job.kill(suppress_failure=suppress_failure)
while any(job.is_running() for job in jobs):
time.sleep(1)
def image_exists(image):
"""Returns True if given docker image exists."""
return subprocess.call(['docker', 'inspect', image],
stdin=subprocess.PIPE,
stdout=_DEVNULL,
stderr=subprocess.STDOUT) == 0
def remove_image(image, skip_nonexistent=False, max_retries=10):
"""Attempts to remove docker image with retries."""
if skip_nonexistent and not image_exists(image):
return True
for attempt in range(0, max_retries):
if subprocess.call(['docker', 'rmi', '-f', image],
stdin=subprocess.PIPE,
stdout=_DEVNULL,
stderr=subprocess.STDOUT) == 0:
return True
time.sleep(2)
print('Failed to remove docker image %s' % image)
return False
class DockerJob:
"""Encapsulates a job"""
def __init__(self, spec):
self._spec = spec
self._job = jobset.Job(spec,
newline_on_success=True,
travis=True,
add_env={})
self._container_name = spec.container_name
def mapped_port(self, port):
return docker_mapped_port(self._container_name, port)
def ip_address(self):
return docker_ip_address(self._container_name)
def wait_for_healthy(self, timeout_seconds):
wait_for_healthy(self._container_name, self._spec.shortname,
timeout_seconds)
def kill(self, suppress_failure=False):
"""Sends kill signal to the container."""
if suppress_failure:
self._job.suppress_failure_message()
return docker_kill(self._container_name)
def is_running(self):
"""Polls a job and returns True if given job is still running."""
return self._job.state() == jobset._RUNNING
|
