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"""Models for manipulating images in/to/from storage."""
import collections
import copy
import functools
import json
from . import Config
from .containers import Container
class Image(collections.UserDict):
"""Model for an Image."""
def __init__(self, client, id, data):
"""Construct Image Model."""
super(Image, self).__init__(data)
for k, v in data.items():
setattr(self, k, v)
self._id = id
self._client = client
assert self._id == self.id,\
'Requested image id({}) does not match store id({})'.format(
self._id, self.id
)
def __getitem__(self, key):
"""Get items from parent dict."""
return super().__getitem__(key)
def _split_token(self, values=None, sep='='):
mapped = {}
if values:
for var in values:
k, v = var.split(sep, 1)
mapped[k] = v
return mapped
def create(self, *args, **kwargs):
"""Create container from image.
Pulls defaults from image.inspect()
"""
# Inialize config from parameters
with self._client() as podman:
details = self.inspect()
# TODO: remove network settings once defaults implemented in service
config = Config(image_id=self.id, **kwargs)
config['command'] = details.containerconfig['cmd']
config['env'] = self._split_token(details.containerconfig['env'])
config['image'] = copy.deepcopy(details.repotags[0])
config['labels'] = copy.deepcopy(details.labels)
config['net_mode'] = 'bridge'
config['network'] = 'bridge'
config['work_dir'] = '/tmp'
with self._client() as podman:
id = podman.CreateContainer(config)['container']
cntr = podman.GetContainer(id)
return Container(self._client, id, cntr['container'])
container = create
def export(self, dest, compressed=False):
"""Write image to dest, return id on success."""
with self._client() as podman:
results = podman.ExportImage(self.id, dest, compressed)
return results['image']
def history(self):
"""Retrieve image history."""
with self._client() as podman:
for r in podman.HistoryImage(self.id)['history']:
yield collections.namedtuple('HistoryDetail', r.keys())(**r)
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 image."""
with self._client() as podman:
results = podman.InspectImage(self.id)
obj = json.loads(results['image'], object_hook=self._lower_hook())
return collections.namedtuple('ImageInspect', obj.keys())(**obj)
def push(self, target, tlsverify=False):
"""Copy image to target, return id on success."""
with self._client() as podman:
results = podman.PushImage(self.id, target, tlsverify)
return results['image']
def remove(self, force=False):
"""Delete image, return id on success.
force=True, stop any running containers using image.
"""
with self._client() as podman:
results = podman.RemoveImage(self.id, force)
return results['image']
def tag(self, tag):
"""Tag image."""
with self._client() as podman:
results = podman.TagImage(self.id, tag)
return results['image']
class Images(object):
"""Model for Images collection."""
def __init__(self, client):
"""Construct model for Images collection."""
self._client = client
def list(self):
"""List all images in the libpod image store."""
with self._client() as podman:
results = podman.ListImages()
for img in results['images']:
yield Image(self._client, img['id'], img)
def build(self, *args, **kwargs):
"""Build container from image.
See podman-build.1.md for kwargs details.
"""
with self._client() as podman:
# TODO: Need arguments
podman.BuildImage()
def delete_unused(self):
"""Delete Images not associated with a container."""
with self._client() as podman:
results = podman.DeleteUnusedImages()
return results['images']
def import_image(self, source, reference, message=None, changes=None):
"""Read image tarball from source and save in image store."""
with self._client() as podman:
results = podman.ImportImage(source, reference, message, changes)
return results['image']
def pull(self, source):
"""Copy image from registry to image store."""
with self._client() as podman:
results = podman.PullImage(source)
return results['id']
def search(self, id, limit=25):
"""Search registries for id."""
with self._client() as podman:
results = podman.SearchImage(id, limit)
for img in results['images']:
yield collections.namedtuple('ImageSearch', img.keys())(**img)
def get(self, id):
"""Get Image from id."""
return next((i for i in self.list() if i.id == id), None)
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