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
|
"""Models for manipulating containers and storage."""
import collections
import functools
import getpass
import json
import signal
class Container(collections.UserDict):
"""Model for a container."""
def __init__(self, client, id, data):
"""Construct Container Model."""
super(Container, self).__init__(data)
self._client = client
self._id = id
self._refresh(data)
assert self._id == self.data['id'],\
'Requested container id({}) does not match store id({})'.format(
self._id, self.id
)
def __getitem__(self, key):
"""Get items from parent dict + apply aliases."""
if key == 'running':
key = 'containerrunning'
return super().__getitem__(key)
def _refresh(self, data):
super().update(data)
for k, v in data.items():
setattr(self, k, v)
setattr(self, 'running', data['containerrunning'])
def refresh(self):
"""Refresh status fields for this container."""
ctnr = Containers(self._client).get(self.id)
self._refresh(ctnr)
def attach(self, detach_key=None, no_stdin=False, sig_proxy=True):
"""Attach to running container."""
with self._client() as podman:
# TODO: streaming and port magic occur, need arguements
podman.AttachToContainer()
def processes(self):
"""Show processes running in container."""
with self._client() as podman:
results = podman.ListContainerProcesses(self.id)
for p in results['container']:
yield p
def changes(self):
"""Retrieve container changes."""
with self._client() as podman:
results = podman.ListContainerChanges(self.id)
return results['container']
def kill(self, signal=signal.SIGTERM):
"""Send signal to container, return id if successful.
default signal is signal.SIGTERM.
"""
with self._client() as podman:
results = podman.KillContainer(self.id, signal)
return results['container']
def _lower_hook(self):
"""Convert all keys to lowercase."""
@functools.wraps(self._lower_hook)
def wrapped(input):
return {k.lower(): v for (k, v) in input.items()}
return wrapped
def inspect(self):
"""Retrieve details about containers."""
with self._client() as podman:
results = podman.InspectContainer(self.id)
obj = json.loads(
results['container'], object_hook=self._lower_hook())
return collections.namedtuple('ContainerInspect',
obj.keys())(**obj)
def export(self, target):
"""Export container from store to tarball.
TODO: should there be a compress option, like images?
"""
with self._client() as podman:
results = podman.ExportContainer(self.id, target)
return results['tarfile']
def commit(self,
image_name,
*args,
changes=[],
message='',
pause=True,
**kwargs):
"""Create image from container.
All changes overwrite existing values.
See inspect() to obtain current settings.
Changes:
CMD=/usr/bin/zsh
ENTRYPOINT=/bin/sh date
ENV=TEST=test_containers.TestContainers.test_commit
EXPOSE=8888/tcp
LABEL=unittest=test_commit
USER=bozo:circus
VOLUME=/data
WORKDIR=/data/application
"""
# TODO: Clean up *args, **kwargs after Commit() is complete
try:
author = kwargs.get('author', getpass.getuser())
except Exception:
author = ''
for c in changes:
if c.startswith('LABEL=') and c.count('=') < 2:
raise ValueError(
'LABEL should have the format: LABEL=label=value, not {}'.
format(c))
with self._client() as podman:
results = podman.Commit(self.id, image_name, changes, author,
message, pause)
return results['image']
def start(self):
"""Start container, return id on success."""
with self._client() as podman:
results = podman.StartContainer(self.id)
return results['container']
def stop(self, timeout=25):
"""Stop container, return id on success."""
with self._client() as podman:
results = podman.StopContainer(self.id, timeout)
return results['container']
def remove(self, force=False):
"""Remove container, return id on success.
force=True, stop running container.
"""
with self._client() as podman:
results = podman.RemoveContainer(self.id, force)
return results['container']
def restart(self, timeout=25):
"""Restart container with timeout, return id on success."""
with self._client() as podman:
results = podman.RestartContainer(self.id, timeout)
return results['container']
def rename(self, target):
"""Rename container, return id on success."""
with self._client() as podman:
# TODO: Need arguements
results = podman.RenameContainer()
# TODO: fixup objects cached information
return results['container']
def resize_tty(self, width, height):
"""Resize container tty."""
with self._client() as podman:
# TODO: magic re: attach(), arguements
podman.ResizeContainerTty()
def pause(self):
"""Pause container, return id on success."""
with self._client() as podman:
results = podman.PauseContainer(self.id)
return results['container']
def unpause(self):
"""Unpause container, return id on success."""
with self._client() as podman:
results = podman.UnpauseContainer(self.id)
return results['container']
def update_container(self, *args, **kwargs):
"""TODO: Update container..., return id on success."""
with self._client() as podman:
results = podman.UpdateContainer()
self.refresh()
return results['container']
def wait(self):
"""Wait for container to finish, return 'returncode'."""
with self._client() as podman:
results = podman.WaitContainer(self.id)
return int(results['exitcode'])
def stats(self):
"""Retrieve resource stats from the container."""
with self._client() as podman:
results = podman.GetContainerStats(self.id)
obj = results['container']
return collections.namedtuple('StatDetail', obj.keys())(**obj)
def logs(self, *args, **kwargs):
"""Retrieve container logs."""
with self._client() as podman:
results = podman.GetContainerLogs(self.id)
for line in results:
yield line
class Containers(object):
"""Model for Containers collection."""
def __init__(self, client):
"""Construct model for Containers collection."""
self._client = client
def list(self):
"""List of containers in the container store."""
with self._client() as podman:
results = podman.ListContainers()
for cntr in results['containers']:
yield Container(self._client, cntr['id'], cntr)
def delete_stopped(self):
"""Delete all stopped containers."""
with self._client() as podman:
results = podman.DeleteStoppedContainers()
return results['containers']
def create(self, *args, **kwargs):
"""Create container layer over the specified image.
See podman-create.1.md for kwargs details.
"""
with self._client() as podman:
results = podman.CreateContainer()
return results['id']
def get(self, id):
"""Retrieve container details from store."""
with self._client() as podman:
cntr = podman.GetContainer(id)
return Container(self._client, cntr['container']['id'],
cntr['container'])
|
