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#!/usr/bin/env python3
# -*- coding: utf-8 -*-
#
# Copyright (c) 2017 Cisco and/or its affiliates.
#
# 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.
#
import logging
import time
from netmodel.model.type import Self
from vicn.core.attribute import Attribute, Multiplicity
from vicn.core.exception import ResourceNotFound
from vicn.core.requirement import Requirement
from vicn.core.resource import Resource
from vicn.core.task import task, inline_task
from vicn.resource.linux.application import LinuxApplication as Application
from vicn.resource.node import Node
log = logging.getLogger(__name__)
class LxcImage(Resource):
"""
Resource: LxcImage
"""
node = Attribute(Node, description = 'Node on which the image is stored',
mandatory = True,
requirements = [
Requirement('lxd_hypervisor')
])
image = Attribute(Self, description = 'image', default = None)
applications = Attribute(Application, multiplicity = Multiplicity.OneToMany)
#---------------------------------------------------------------------------
# Constructor / Accessors
#---------------------------------------------------------------------------
def __init__(self, *args, **kwargs):
self.fingerprint = None
self._tmp_container = None
super().__init__(*args, **kwargs)
#---------------------------------------------------------------------------
# Resource lifecycle
#---------------------------------------------------------------------------
@task
def __get__(self):
aliases = [alias['name'] for images in self.node.lxd_hypervisor.client.images.all()
for alias in images.aliases]
if not self.image in aliases:
raise ResourceNotFound
@inline_task
def __create__(self):
log.warning('Image creation is currently disabled')
return
@task
def __create_DISABLED__(self):
"""
Image creation consists in setting up a temporary container, stopping
it, publishing an image of it, setting an alias, and deleting it.
"""
tmp_container.setup()
print("TODO: Installing applications...")
for application in self.applications:
print('Installing application on image')
application.setup()
# XXX stop() hangs if run to early wrt container start
# - is it related to ZFS ? is it a more general problem ?
time.sleep(5)
print("I: Stopping container")
tmp_container.stop()
print("I: Publishing image")
image_metadata = tmp_container.publish_image() # METHOD !
print("MD=", image_metadata)
self.fingerprint = image_metadata['fingerprint']
self.set_alias()
tmp_container.delete()
@task
def __delete__(self):
self.node.lxd_hypervisor.client.images.delete(self.name)
#---------------------------------------------------------------------------
# Public methods
#---------------------------------------------------------------------------
def set_alias(self):
alias_dict = {
"description": "Ubuntu 16.04 image with ICN software already installed",
"target": self.fingerprint,
"name": self.name
}
self.node.lxd_hypervisor.set_alias(alias_dict)
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