Add OVA upload to API (initial)
Initial, very barebones OVA parsing and image creation. References #71
This commit is contained in:
parent
95c59c2b39
commit
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@ -39,6 +39,7 @@ from celery.task.control import inspect
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import pvcapid.helper as api_helper
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import pvcapid.provisioner as api_provisioner
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import pvcapid.ova as api_ova
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API_VERSION = 1.0
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@ -94,6 +95,8 @@ try:
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api_helper.config = config
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# Set the config object in the api_provisioner namespace
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api_provisioner.config = config
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# Set the config object in the api_ova namespace
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api_ova.config = config
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except Exception as e:
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print('ERROR: Failed to load configuration: {}'.format(e))
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exit(1)
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@ -5575,6 +5578,98 @@ class API_Provisioner_Create_Root(Resource):
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return { "task_id": task.id }, 202, { 'Location': Api.url_for(api, API_Provisioner_Status_Element, task_id=task.id) }
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api.add_resource(API_Provisioner_Create_Root, '/provisioner/create')
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# /provisioner/upload
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class API_Provisioner_Upload(Resource):
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@RequestParser([
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{ 'name': 'ova_size', 'required': True, 'helpmsg': "An OVA size must be specified" },
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{ 'name': 'pool', 'required': True, 'helpmsg': "A storage pool must be specified" },
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{ 'name': 'name', 'required': True, 'helpmsg': "A VM name must be specified" },
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{ 'name': 'define_vm' },
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{ 'name': 'start_vm' }
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])
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@Authenticator
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def post(self, reqargs):
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"""
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Upload an OVA image to a new virtual machine
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The API client is responsible for determining and setting the ova_size value, as this value cannot be determined dynamically before the upload proceeds.
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Even if define_vm is false, the name will be used to name the resulting disk volumes as it would with a normally-provisioned VM.
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The resulting VM, even if defined, will not have an attached provisioner profile.
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---
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tags:
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- provisioner
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parameters:
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- in: query
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name: ova_size
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type: string
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required: true
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description: Size of the OVA file in bytes
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- in: query
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name: pool
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type: string
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required: true
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description: Storage pool name
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- in: query
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name: name
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type: string
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required: true
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description: Virtual machine name
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- in: query
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name: define_vm
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type: boolean
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required: false
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description: Whether to define the VM on the cluster during provisioning
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- in: query
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name: start_vm
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type: boolean
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required: false
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description: Whether to start the VM after provisioning
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responses:
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200:
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description: OK
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schema:
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type: object
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properties:
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task_id:
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type: string
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description: Task ID for the provisioner Celery worker
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400:
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description: Bad request
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schema:
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type: object
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id: Message
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"""
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from flask_restful import reqparse
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from werkzeug.datastructures import FileStorage
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parser = reqparse.RequestParser()
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parser.add_argument('file', type=FileStorage, location='files')
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data = parser.parse_args()
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ova_data = data.get('file', None)
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if not ova_data:
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return {'message':'An OVA file contents must be specified'}, 400
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if bool(strtobool(reqargs.get('define_vm', 'true'))):
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define_vm = True
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else:
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define_vm = False
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if bool(strtobool(reqargs.get('start_vm', 'true'))):
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start_vm = True
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else:
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start_vm = False
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return api_ova.upload_ova(
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ova_data,
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reqargs.get('ova_size', None),
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reqargs.get('pool', None),
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reqargs.get('name', None),
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define_vm,
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start_vm
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)
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api.add_resource(API_Provisioner_Upload, '/provisioner/upload')
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# /provisioner/status
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class API_Provisioner_Status_Root(Resource):
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@Authenticator
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@ -0,0 +1,424 @@
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#!/usr/bin/env python3
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# ova.py - PVC OVA parser library
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# Part of the Parallel Virtual Cluster (PVC) system
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#
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# Copyright (C) 2018-2020 Joshua M. Boniface <joshua@boniface.me>
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#
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# This program is free software: you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation, either version 3 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program. If not, see <https://www.gnu.org/licenses/>.
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#
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###############################################################################
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import flask
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import json
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import psycopg2
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import psycopg2.extras
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import os
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import re
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import time
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import math
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import tarfile
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import shutil
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import shlex
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import subprocess
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import lxml.etree
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import daemon_lib.common as pvc_common
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import daemon_lib.node as pvc_node
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import daemon_lib.vm as pvc_vm
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import daemon_lib.network as pvc_network
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import daemon_lib.ceph as pvc_ceph
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import pvcapid.libvirt_schema as libvirt_schema
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#
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# OVA upload function
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#
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def upload_ova(ova_data, ova_size, pool, name, define_vm, start_vm):
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# Upload flow is as follows:
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# 1. Create temporary volume of ova_size
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# 2. Map the temporary volume for reading
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# 3. Write OVA upload file to temporary volume
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# 4. Read tar from temporary volume, extract OVF
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# 5. Parse OVF, obtain disk list and VM details
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# 6. Extract and "upload" via API each disk image to Ceph
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# 7. Unmap and remove the temporary volume
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# 8. Define VM (if applicable)
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# 9. Start VM (if applicable)
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###########################################################
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# Cleanup function
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def cleanup_ova_maps_and_volumes():
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# Close the OVA archive
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ova_archive.close()
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zk_conn = pvc_common.startZKConnection(config['coordinators'])
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# Unmap the OVA temporary blockdev
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retflag, retdata = pvc_ceph.unmap_volume(zk_conn, pool, "{}_ova".format(name))
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# Remove the OVA temporary blockdev
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retflag, retdata = pvc_ceph.remove_volume(zk_conn, pool, "{}_ova".format(name))
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pvc_common.stopZKConnection(zk_conn)
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# Normalize the OVA size to MB
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print("Normalize the OVA size to MB")
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# The function always return XXXXB, so strip off the B and convert to an integer
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ova_size_bytes = int(pvc_ceph.format_bytes_fromhuman(ova_size)[:-1])
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# Put the size into KB which rbd --size can understand
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ova_size_kb = math.ceil(ova_size_bytes / 1024)
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ova_size = "{}K".format(ova_size_kb)
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# Create a temporary OVA blockdev
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print("Create a temporary OVA blockdev")
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zk_conn = pvc_common.startZKConnection(config['coordinators'])
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print(ova_size)
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retflag, retdata = pvc_ceph.add_volume(zk_conn, pool, "{}_ova".format(name), ova_size)
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pvc_common.stopZKConnection(zk_conn)
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if not retflag:
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output = {
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'message': retdata.replace('\"', '\'')
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}
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retcode = 400
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cleanup_ova_maps_and_volumes()
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return output, retcode
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# Map the temporary OVA blockdev
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print("Map the temporary OVA blockdev")
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zk_conn = pvc_common.startZKConnection(config['coordinators'])
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retflag, retdata = pvc_ceph.map_volume(zk_conn, pool, "{}_ova".format(name))
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pvc_common.stopZKConnection(zk_conn)
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if not retflag:
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output = {
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'message': retdata.replace('\"', '\'')
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}
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retcode = 400
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cleanup_ova_maps_and_volumes()
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return output, retcode
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ova_blockdev = retdata
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# Save the OVA data to the temporary blockdev directly
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print("Save the OVA data to the temporary blockdev directly")
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try:
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ova_data.save(ova_blockdev)
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except:
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output = {
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'message': "ERROR: Failed to write OVA file to temporary volume."
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}
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retcode = 400
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cleanup_ova_maps_and_volumes()
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return output, retcode
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try:
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# Set up the TAR reader for the OVA temporary blockdev
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print("Set up the TAR reader for the OVA temporary blockdev")
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ova_archive = tarfile.open(name=ova_blockdev)
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# Determine the files in the OVA
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print("Determine the files in the OVA")
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members = ova_archive.getmembers()
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except tarfile.TarError:
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output = {
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'message': "ERROR: The uploaded OVA file is not readable."
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}
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retcode = 400
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cleanup_ova_maps_and_volumes()
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return output, retcode
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# Parse through the members list and extract the OVF file
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print("Parse through the members list and extract the OVF file")
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for element in set(x for x in members if re.match('.*\.ovf$', x.name)):
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ovf_file = ova_archive.extractfile(element)
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print(ovf_file)
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# Parse the OVF file to get our VM details
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print("Parse the OVF file to get our VM details")
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ovf_parser = OVFParser(ovf_file)
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virtual_system = ovf_parser.getVirtualSystems()[0]
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virtual_hardware = ovf_parser.getVirtualHardware(virtual_system)
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disk_map = ovf_parser.getDiskMap(virtual_system)
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# Close the OVF file
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print("Close the OVF file")
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ovf_file.close()
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print(virtual_hardware)
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print(disk_map)
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# Verify that the cluster has enough space to store all OVA disk volumes
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total_size_bytes = 0
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for disk in disk_map:
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# Normalize the dev size to MB
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print("Normalize the dev size to MB")
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# The function always return XXXXB, so strip off the B and convert to an integer
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dev_size_bytes = int(pvc_ceph.format_bytes_fromhuman(disk.get('capacity', 0))[:-1])
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ova_size_bytes = int(pvc_ceph.format_bytes_fromhuman(ova_size)[:-1])
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# Get the actual image size
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total_size_bytes += dev_size_bytes
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# Add on the OVA size to account for the VMDK
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total_size_bytes += ova_size_bytes
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zk_conn = pvc_common.startZKConnection(config['coordinators'])
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pool_information = pvc_ceph.getPoolInformation(zk_conn, pool)
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pvc_common.stopZKConnection(zk_conn)
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pool_free_space_bytes = int(pool_information['stats']['free_bytes'])
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if total_size_bytes >= pool_free_space_bytes:
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output = {
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'message': "ERROR: The cluster does not have enough free space ({}) to store the VM ({}).".format(
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pvc_ceph.format_bytes_tohuman(pool_free_space_bytes),
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pvc_ceph.format_bytes_tohuman(total_size_bytes)
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)
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}
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retcode = 400
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cleanup_ova_maps_and_volumes()
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return output, retcode
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# Create and upload each disk volume
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for idx, disk in enumerate(disk_map):
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disk_identifier = "sd{}".format(chr(ord('a') + idx))
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volume = "{}_{}".format(name, disk_identifier)
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dev_size = disk.get('capacity')
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# Normalize the dev size to MB
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print("Normalize the dev size to MB")
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# The function always return XXXXB, so strip off the B and convert to an integer
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dev_size_bytes = int(pvc_ceph.format_bytes_fromhuman(dev_size)[:-1])
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dev_size_mb = math.ceil(dev_size_bytes / 1024 / 1024)
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dev_size = "{}M".format(dev_size_mb)
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def cleanup_img_maps_and_volumes():
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zk_conn = pvc_common.startZKConnection(config['coordinators'])
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# Unmap the target blockdev
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retflag, retdata = pvc_ceph.unmap_volume(zk_conn, pool, volume)
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# Unmap the temporary blockdev
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retflag, retdata = pvc_ceph.unmap_volume(zk_conn, pool, "{}_tmp".format(volume))
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# Remove the temporary blockdev
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retflag, retdata = pvc_ceph.remove_volume(zk_conn, pool, "{}_tmp".format(volume))
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pvc_common.stopZKConnection(zk_conn)
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# Create target blockdev
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zk_conn = pvc_common.startZKConnection(config['coordinators'])
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pool_information = pvc_ceph.add_volume(zk_conn, pool, volume, dev_size)
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pvc_common.stopZKConnection(zk_conn)
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# Create a temporary blockdev
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zk_conn = pvc_common.startZKConnection(config['coordinators'])
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retflag, retdata = pvc_ceph.add_volume(zk_conn, pool, "{}_tmp".format(volume), ova_size)
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pvc_common.stopZKConnection(zk_conn)
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if not retflag:
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output = {
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'message': retdata.replace('\"', '\'')
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}
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retcode = 400
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cleanup_img_maps_and_volumes()
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cleanup_ova_maps_and_volumes()
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return output, retcode
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# Map the temporary target blockdev
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zk_conn = pvc_common.startZKConnection(config['coordinators'])
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retflag, retdata = pvc_ceph.map_volume(zk_conn, pool, "{}_tmp".format(volume))
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pvc_common.stopZKConnection(zk_conn)
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if not retflag:
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output = {
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'message': retdata.replace('\"', '\'')
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}
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retcode = 400
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cleanup_img_maps_and_volumes()
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cleanup_ova_maps_and_volumes()
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return output, retcode
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temp_blockdev = retdata
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# Map the target blockdev
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zk_conn = pvc_common.startZKConnection(config['coordinators'])
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retflag, retdata = pvc_ceph.map_volume(zk_conn, pool, volume)
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pvc_common.stopZKConnection(zk_conn)
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if not retflag:
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output = {
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'message': retdata.replace('\"', '\'')
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}
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retcode = 400
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cleanup_img_maps_and_volumes()
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cleanup_ova_maps_and_volumes()
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return output, retcode
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dest_blockdev = retdata
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# Save the data to the temporary blockdev directly
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img_type = disk.get('src').split('.')[-1]
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try:
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# Open (extract) the TAR archive file and seek to byte 0
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vmdk_file = ova_archive.extractfile(disk.get('src'))
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vmdk_file.seek(0)
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# Open the temporary blockdev and seek to byte 0
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blk_file = open(temp_blockdev, 'wb')
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blk_file.seek(0)
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# Write the contents of vmdk_file into blk_file
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bytes_written = blk_file.write(vmdk_file.read())
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# Close blk_file (and flush the buffers)
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blk_file.close()
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# Close vmdk_file
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vmdk_file.close()
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# Perform an OS-level sync
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pvc_common.run_os_command('sync')
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# Shrink the tmp RBD image to the exact size of the written file
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# This works around a bug in this method where an EOF is never written to the end of the
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# target blockdev, thus causing an "Invalid footer" error. Instead, if we just shrink the
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# RBD volume to the exact size, this is treated as an EOF
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pvc_common.run_os_command('rbd resize {}/{}_{}_tmp --size {}B --allow-shrink'.format(pool, name, disk_identifier, bytes_written))
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except:
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output = {
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'message': "ERROR: Failed to write image file '{}' to temporary volume.".format(disk.get('src'))
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}
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retcode = 400
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cleanup_img_maps_and_volumes()
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cleanup_ova_maps_and_volumes()
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return output, retcode
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# Convert from the temporary to destination format on the blockdevs
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retcode, stdout, stderr = pvc_common.run_os_command(
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'qemu-img convert -C -f {} -O raw {} {}'.format(img_type, temp_blockdev, dest_blockdev)
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)
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if retcode:
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output = {
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'message': "ERROR: Failed to convert image '{}' format from '{}' to 'raw': {}".format(disk.get('src'), img_type, stderr)
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}
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retcode = 400
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cleanup_img_maps_and_volumes()
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cleanup_ova_maps_and_volumes()
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return output, retcode
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cleanup_img_maps_and_volumes()
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cleanup_ova_maps_and_volumes()
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# Prepare a VM configuration
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output = {
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'message': "Imported OVA file to new VM '{}'".format(name)
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}
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retcode = 200
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return output, retcode
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#
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# OVF parser
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#
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OVF_SCHEMA = "http://schemas.dmtf.org/ovf/envelope/2"
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RASD_SCHEMA = "http://schemas.dmtf.org/wbem/wscim/1/cim-schema/2/CIM_ResourceAllocationSettingData"
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SASD_SCHEMA = "http://schemas.dmtf.org/wbem/wscim/1/cim-schema/2/CIM_StorageAllocationSettingData.xsd"
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VSSD_SCHEMA = "http://schemas.dmtf.org/wbem/wscim/1/cim-schema/2/CIM_VirtualSystemSettingData"
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XML_SCHEMA = "http://www.w3.org/2001/XMLSchema-instance"
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RASD_TYPE = {
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"3": "vcpus",
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"4": "vram",
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"5": "ide-controller",
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"6": "scsi-controller",
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"10": "ethernet-adapter",
|
||||
"15": "cdrom",
|
||||
"17": "disk",
|
||||
"20": "other-storage-device",
|
||||
"23": "usb-controller",
|
||||
"24": "graphics-controller",
|
||||
"35": "sound-controller"
|
||||
}
|
||||
SASD_TYPE = {
|
||||
"15": "cdrom",
|
||||
"17": "disk"
|
||||
}
|
||||
|
||||
class OVFParser(object):
|
||||
def _getFilelist(self):
|
||||
path = "{{{schema}}}References/{{{schema}}}File".format(schema=OVF_SCHEMA)
|
||||
id_attr = "{{{schema}}}id".format(schema=OVF_SCHEMA)
|
||||
href_attr = "{{{schema}}}href".format(schema=OVF_SCHEMA)
|
||||
current_list = self.xml.findall(path)
|
||||
results = [(x.get(id_attr), x.get(href_attr)) for x in current_list]
|
||||
return results
|
||||
|
||||
def _getDisklist(self):
|
||||
path = "{{{schema}}}DiskSection/{{{schema}}}Disk".format(schema=OVF_SCHEMA)
|
||||
id_attr = "{{{schema}}}diskId".format(schema=OVF_SCHEMA)
|
||||
ref_attr = "{{{schema}}}fileRef".format(schema=OVF_SCHEMA)
|
||||
cap_attr = "{{{schema}}}capacity".format(schema=OVF_SCHEMA)
|
||||
current_list = self.xml.findall(path)
|
||||
results = [(x.get(id_attr), x.get(ref_attr), x.get(cap_attr)) for x in current_list]
|
||||
return results
|
||||
|
||||
def _getAttributes(self, virtual_system, path, attribute):
|
||||
current_list = virtual_system.findall(path)
|
||||
results = [x.get(attribute) for x in current_list]
|
||||
return results
|
||||
|
||||
def __init__(self, ovf_file):
|
||||
self.xml = lxml.etree.parse(ovf_file)
|
||||
self.filelist = self._getFilelist()
|
||||
self.disklist = self._getDisklist()
|
||||
|
||||
def getVirtualSystems(self):
|
||||
return self.xml.findall("{{{schema}}}VirtualSystem".format(schema=OVF_SCHEMA))
|
||||
|
||||
def getVirtualHardware(self, virtual_system):
|
||||
hardware_list = virtual_system.findall(
|
||||
"{{{schema}}}VirtualHardwareSection/{{{schema}}}Item".format(schema=OVF_SCHEMA)
|
||||
)
|
||||
virtual_hardware = {}
|
||||
|
||||
for item in hardware_list:
|
||||
try:
|
||||
item_type = RASD_TYPE[item.find("{{{rasd}}}ResourceType".format(rasd=RASD_SCHEMA)).text]
|
||||
except:
|
||||
continue
|
||||
quantity = item.find("{{{rasd}}}VirtualQuantity".format(rasd=RASD_SCHEMA))
|
||||
if quantity is None:
|
||||
continue
|
||||
print(item_type)
|
||||
virtual_hardware[item_type] = quantity.text
|
||||
|
||||
return virtual_hardware
|
||||
|
||||
def getDiskMap(self, virtual_system):
|
||||
hardware_list = virtual_system.findall(
|
||||
"{{{schema}}}VirtualHardwareSection/{{{schema}}}StorageItem".format(schema=OVF_SCHEMA)
|
||||
)
|
||||
disk_list = []
|
||||
|
||||
for item in hardware_list:
|
||||
item_type = None
|
||||
try:
|
||||
item_type = SASD_TYPE[item.find("{{{sasd}}}ResourceType".format(sasd=SASD_SCHEMA)).text]
|
||||
except:
|
||||
item_type = RASD_TYPE[item.find("{{{rasd}}}ResourceType".format(rasd=RASD_SCHEMA)).text]
|
||||
|
||||
if item_type != 'disk':
|
||||
continue
|
||||
|
||||
hostref = None
|
||||
try:
|
||||
hostref = item.find("{{{sasd}}}HostResource".format(sasd=SASD_SCHEMA))
|
||||
except:
|
||||
hostref = item.find("{{{rasd}}}HostResource".format(rasd=RASD_SCHEMA))
|
||||
if hostref is None:
|
||||
continue
|
||||
disk_res = hostref.text
|
||||
|
||||
# Determine which file this disk_res ultimately represents
|
||||
(disk_id, disk_ref, disk_capacity) = [x for x in self.disklist if x[0] == disk_res.split('/')[-1]][0]
|
||||
(file_id, disk_src) = [x for x in self.filelist if x[0] == disk_ref][0]
|
||||
|
||||
# Append the disk with all details to the list
|
||||
disk_list.append({
|
||||
"id": disk_id,
|
||||
"ref": disk_ref,
|
||||
"capacity": disk_capacity,
|
||||
"src": disk_src
|
||||
})
|
||||
|
||||
return disk_list
|
||||
|
|
@ -17,7 +17,7 @@ Description: Parallel Virtual Cluster node daemon (Python 3)
|
|||
|
||||
Package: pvc-daemon-api
|
||||
Architecture: all
|
||||
Depends: systemd, pvc-daemon-common, python3-yaml, python3-flask, python3-flask-restful, python3-gevent, python3-celery, python-celery-common, python3-distutils, redis, python3-redis
|
||||
Depends: systemd, pvc-daemon-common, python3-yaml, python3-flask, python3-flask-restful, python3-gevent, python3-celery, python-celery-common, python3-distutils, redis, python3-redis, python3-lxml
|
||||
Description: Parallel Virtual Cluster API daemon (Python 3)
|
||||
A KVM/Zookeeper/Ceph-based VM and private cloud manager
|
||||
.
|
||||
|
|
|
|||
Loading…
Reference in New Issue