551 lines
20 KiB
Python
Executable File
551 lines
20 KiB
Python
Executable File
#!/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 psycopg2
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import psycopg2.extras
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import re
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import math
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import tarfile
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import lxml.etree
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from werkzeug.formparser import parse_form_data
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import daemon_lib.common as pvc_common
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import daemon_lib.ceph as pvc_ceph
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import pvcapid.provisioner as provisioner
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config = None # Set in this namespace by flaskapi
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#
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# Common functions
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#
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# Database connections
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def open_database(config):
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conn = psycopg2.connect(
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host=config['database_host'],
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port=config['database_port'],
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dbname=config['database_name'],
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user=config['database_user'],
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password=config['database_password']
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)
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cur = conn.cursor(cursor_factory=psycopg2.extras.RealDictCursor)
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return conn, cur
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def close_database(conn, cur, failed=False):
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if not failed:
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conn.commit()
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cur.close()
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conn.close()
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#
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# OVA functions
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#
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def list_ova(limit, is_fuzzy=True):
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if limit:
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if is_fuzzy:
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# Handle fuzzy vs. non-fuzzy limits
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if not re.match('\^.*', limit):
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limit = '%' + limit
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else:
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limit = limit[1:]
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if not re.match('.*\$', limit):
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limit = limit + '%'
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else:
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limit = limit[:-1]
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query = "SELECT id, name FROM {} WHERE name LIKE %s;".format('ova')
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args = (limit, )
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else:
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query = "SELECT id, name FROM {};".format('ova')
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args = ()
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conn, cur = open_database(config)
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cur.execute(query, args)
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data = cur.fetchall()
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close_database(conn, cur)
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ova_data = list()
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for ova in data:
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ova_id = ova.get('id')
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ova_name = ova.get('name')
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query = "SELECT pool, volume_name, volume_format, disk_id, disk_size_gb FROM {} WHERE ova = %s;".format('ova_volume')
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args = (ova_id,)
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conn, cur = open_database(config)
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cur.execute(query, args)
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volumes = cur.fetchall()
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close_database(conn, cur)
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ova_data.append({'id': ova_id, 'name': ova_name, 'volumes': volumes})
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if ova_data:
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return ova_data, 200
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else:
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return {'message': 'No OVAs found.'}, 404
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def delete_ova(name):
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ova_data, retcode = list_ova(name, is_fuzzy=False)
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if retcode != 200:
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retmsg = {'message': 'The OVA "{}" does not exist.'.format(name)}
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retcode = 400
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return retmsg, retcode
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conn, cur = open_database(config)
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ova_id = ova_data[0].get('id')
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try:
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# Get the list of volumes for this OVA
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query = "SELECT pool, volume_name FROM ova_volume WHERE ova = %s;"
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args = (ova_id,)
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cur.execute(query, args)
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volumes = cur.fetchall()
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# Remove each volume for this OVA
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zk_conn = pvc_common.startZKConnection(config['coordinators'])
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for volume in volumes:
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pvc_ceph.remove_volume(zk_conn, volume.get('pool'), volume.get('volume_name'))
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# Delete the volume entries from the database
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query = "DELETE FROM ova_volume WHERE ova = %s;"
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args = (ova_id,)
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cur.execute(query, args)
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# Delete the profile entries from the database
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query = "DELETE FROM profile WHERE ova = %s;"
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args = (ova_id,)
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cur.execute(query, args)
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# Delete the system_template entries from the database
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query = "DELETE FROM system_template WHERE ova = %s;"
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args = (ova_id,)
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cur.execute(query, args)
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# Delete the OVA entry from the database
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query = "DELETE FROM ova WHERE id = %s;"
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args = (ova_id,)
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cur.execute(query, args)
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retmsg = {"message": 'Removed OVA image "{}".'.format(name)}
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retcode = 200
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except Exception as e:
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retmsg = {'message': 'Failed to remove OVA "{}": {}'.format(name, e)}
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retcode = 400
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close_database(conn, cur)
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return retmsg, retcode
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def upload_ova(pool, name, ova_size):
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ova_archive = None
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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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if 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 bytes
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ova_size_bytes = int(pvc_ceph.format_bytes_fromhuman(ova_size)[:-1])
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ova_size = pvc_ceph.format_bytes_fromhuman(ova_size)
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# Verify that the cluster has enough space to store the OVA volumes (2x OVA size, temporarily, 1x permanently)
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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 ova_size_bytes * 2 >= pool_free_space_bytes:
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output = {
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'message': "The cluster does not have enough free space ({}) to store the OVA volume ({}).".format(
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pvc_ceph.format_bytes_tohuman(pool_free_space_bytes),
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pvc_ceph.format_bytes_tohuman(ova_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 a temporary OVA 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, "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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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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try:
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# This sets up a custom stream_factory that writes directly into the ova_blockdev,
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# rather than the standard stream_factory which writes to a temporary file waiting
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# on a save() call. This will break if the API ever uploaded multiple files, but
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# this is an acceptable workaround.
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def ova_stream_factory(total_content_length, filename, content_type, content_length=None):
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return open(ova_blockdev, 'wb')
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parse_form_data(flask.request.environ, stream_factory=ova_stream_factory)
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except Exception:
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output = {
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'message': "Failed to upload or 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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ova_archive = tarfile.open(name=ova_blockdev)
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# 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': "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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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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# Parse the OVF file to get our VM details
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ovf_parser = OVFParser(ovf_file)
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ovf_xml_raw = ovf_parser.getXML()
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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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ovf_file.close()
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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 = "ova_{}_{}".format(name, disk_identifier)
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dev_src = disk.get('src')
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dev_size_raw = ova_archive.getmember(dev_src).size
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vm_volume_size = disk.get('capacity')
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# Normalize the dev size to bytes
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dev_size = pvc_ceph.format_bytes_fromhuman(dev_size_raw)
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def cleanup_img_maps():
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zk_conn = pvc_common.startZKConnection(config['coordinators'])
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# Unmap the temporary blockdev
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retflag, retdata = pvc_ceph.unmap_volume(zk_conn, pool, volume)
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pvc_common.stopZKConnection(zk_conn)
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# Create the 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, volume, dev_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()
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cleanup_ova_maps_and_volumes()
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return output, retcode
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# Map the 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()
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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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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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# 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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except Exception:
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output = {
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'message': "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()
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cleanup_ova_maps_and_volumes()
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return output, retcode
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cleanup_img_maps()
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cleanup_ova_maps_and_volumes()
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# Prepare the database entries
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query = "INSERT INTO ova (name, ovf) VALUES (%s, %s);"
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args = (name, ovf_xml_raw)
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conn, cur = open_database(config)
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try:
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cur.execute(query, args)
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close_database(conn, cur)
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except Exception as e:
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output = {
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'message': 'Failed to create OVA entry "{}": {}'.format(name, e)
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}
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retcode = 400
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close_database(conn, cur)
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return output, retcode
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# Get the OVA database id
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query = "SELECT id FROM ova WHERE name = %s;"
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args = (name, )
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conn, cur = open_database(config)
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cur.execute(query, args)
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ova_id = cur.fetchone()['id']
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close_database(conn, cur)
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# Prepare disk entries in ova_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_type = disk.get('src').split('.')[-1]
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volume = "ova_{}_{}".format(name, disk_identifier)
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vm_volume_size = disk.get('capacity')
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# The function always return XXXXB, so strip off the B and convert to an integer
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vm_volume_size_bytes = int(pvc_ceph.format_bytes_fromhuman(vm_volume_size)[:-1])
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vm_volume_size_gb = math.ceil(vm_volume_size_bytes / 1024 / 1024 / 1024)
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query = "INSERT INTO ova_volume (ova, pool, volume_name, volume_format, disk_id, disk_size_gb) VALUES (%s, %s, %s, %s, %s, %s);"
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args = (ova_id, pool, volume, volume_type, disk_identifier, vm_volume_size_gb)
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conn, cur = open_database(config)
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try:
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cur.execute(query, args)
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close_database(conn, cur)
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except Exception as e:
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output = {
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'message': 'Failed to create OVA volume entry "{}": {}'.format(volume, e)
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}
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retcode = 400
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close_database(conn, cur)
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return output, retcode
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# Prepare a system_template for the OVA
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vcpu_count = virtual_hardware.get('vcpus')
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vram_mb = virtual_hardware.get('vram')
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if virtual_hardware.get('graphics-controller') == 1:
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vnc = True
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serial = False
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else:
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vnc = False
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serial = True
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retdata, retcode = provisioner.create_template_system(name, vcpu_count, vram_mb, serial, vnc, vnc_bind=None, ova=ova_id)
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if retcode != 200:
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return retdata, retcode
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system_template, retcode = provisioner.list_template_system(name, is_fuzzy=False)
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if retcode != 200:
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return retdata, retcode
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system_template_name = system_template[0].get('name')
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# Prepare a barebones profile for the OVA
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retdata, retcode = provisioner.create_profile(name, 'ova', system_template_name, None, None, userdata=None, script=None, ova=name, arguments=None)
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if retcode != 200:
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return retdata, retcode
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output = {
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'message': "Imported OVA image '{}'.".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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class OVFParser(object):
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RASD_TYPE = {
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"1": "vmci",
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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",
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"15": "cdrom",
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"17": "disk",
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"20": "other-storage-device",
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"23": "usb-controller",
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"24": "graphics-controller",
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"35": "sound-controller"
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}
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def _getFilelist(self):
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path = "{{{schema}}}References/{{{schema}}}File".format(schema=self.OVF_SCHEMA)
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id_attr = "{{{schema}}}id".format(schema=self.OVF_SCHEMA)
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href_attr = "{{{schema}}}href".format(schema=self.OVF_SCHEMA)
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current_list = self.xml.findall(path)
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results = [(x.get(id_attr), x.get(href_attr)) for x in current_list]
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return results
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def _getDisklist(self):
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path = "{{{schema}}}DiskSection/{{{schema}}}Disk".format(schema=self.OVF_SCHEMA)
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id_attr = "{{{schema}}}diskId".format(schema=self.OVF_SCHEMA)
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ref_attr = "{{{schema}}}fileRef".format(schema=self.OVF_SCHEMA)
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cap_attr = "{{{schema}}}capacity".format(schema=self.OVF_SCHEMA)
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cap_units = "{{{schema}}}capacityAllocationUnits".format(schema=self.OVF_SCHEMA)
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current_list = self.xml.findall(path)
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results = [(x.get(id_attr), x.get(ref_attr), x.get(cap_attr), x.get(cap_units)) for x in current_list]
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return results
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def _getAttributes(self, virtual_system, path, attribute):
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current_list = virtual_system.findall(path)
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results = [x.get(attribute) for x in current_list]
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return results
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def __init__(self, ovf_file):
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self.xml = lxml.etree.parse(ovf_file)
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# Define our schemas
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envelope_tag = self.xml.find(".")
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self.XML_SCHEMA = envelope_tag.nsmap.get('xsi')
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self.OVF_SCHEMA = envelope_tag.nsmap.get('ovf')
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self.RASD_SCHEMA = envelope_tag.nsmap.get('rasd')
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self.SASD_SCHEMA = envelope_tag.nsmap.get('sasd')
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self.VSSD_SCHEMA = envelope_tag.nsmap.get('vssd')
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self.ovf_version = int(self.OVF_SCHEMA.split('/')[-1])
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# Get the file and disk lists
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self.filelist = self._getFilelist()
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self.disklist = self._getDisklist()
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def getVirtualSystems(self):
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return self.xml.findall("{{{schema}}}VirtualSystem".format(schema=self.OVF_SCHEMA))
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def getXML(self):
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return lxml.etree.tostring(self.xml, pretty_print=True).decode('utf8')
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|
|
|
def getVirtualHardware(self, virtual_system):
|
|
hardware_list = virtual_system.findall(
|
|
"{{{schema}}}VirtualHardwareSection/{{{schema}}}Item".format(schema=self.OVF_SCHEMA)
|
|
)
|
|
virtual_hardware = {}
|
|
|
|
for item in hardware_list:
|
|
try:
|
|
item_type = self.RASD_TYPE[item.find("{{{rasd}}}ResourceType".format(rasd=self.RASD_SCHEMA)).text]
|
|
except Exception:
|
|
continue
|
|
quantity = item.find("{{{rasd}}}VirtualQuantity".format(rasd=self.RASD_SCHEMA))
|
|
if quantity is None:
|
|
virtual_hardware[item_type] = 1
|
|
else:
|
|
virtual_hardware[item_type] = quantity.text
|
|
|
|
return virtual_hardware
|
|
|
|
def getDiskMap(self, virtual_system):
|
|
# OVF v2 uses the StorageItem field, while v1 uses the normal Item field
|
|
if self.ovf_version < 2:
|
|
hardware_list = virtual_system.findall(
|
|
"{{{schema}}}VirtualHardwareSection/{{{schema}}}Item".format(schema=self.OVF_SCHEMA)
|
|
)
|
|
else:
|
|
hardware_list = virtual_system.findall(
|
|
"{{{schema}}}VirtualHardwareSection/{{{schema}}}StorageItem".format(schema=self.OVF_SCHEMA)
|
|
)
|
|
disk_list = []
|
|
|
|
for item in hardware_list:
|
|
item_type = None
|
|
|
|
if self.SASD_SCHEMA is not None:
|
|
item_type = self.RASD_TYPE[item.find("{{{sasd}}}ResourceType".format(sasd=self.SASD_SCHEMA)).text]
|
|
else:
|
|
item_type = self.RASD_TYPE[item.find("{{{rasd}}}ResourceType".format(rasd=self.RASD_SCHEMA)).text]
|
|
|
|
if item_type != 'disk':
|
|
continue
|
|
|
|
hostref = None
|
|
if self.SASD_SCHEMA is not None:
|
|
hostref = item.find("{{{sasd}}}HostResource".format(sasd=self.SASD_SCHEMA))
|
|
else:
|
|
hostref = item.find("{{{rasd}}}HostResource".format(rasd=self.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, disk_capacity_unit) = [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]
|
|
|
|
if disk_capacity_unit is not None:
|
|
# Handle the unit conversion
|
|
base_unit, action, multiple = disk_capacity_unit.split()
|
|
multiple_base, multiple_exponent = multiple.split('^')
|
|
disk_capacity = int(disk_capacity) * (int(multiple_base) ** int(multiple_exponent))
|
|
|
|
# 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
|