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Commit 2b4ce60c by Szeberényi Imre
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Merge branch 'export_progress' into 'master' 

Export and import disk progress

See merge request !19
parents 8f4918e4 7af8d98d
Showing with 98 additions and 37 deletions
disk.py
import shutil
import json import json
import os import os
import subprocess import subprocess
import logging import logging
...@@ -13,7 +12,7 @@ from time import sleep ...@@ -13,7 +12,7 @@ from time import sleep
from hashlib import md5 from hashlib import md5
import re import re
from requests_toolbelt import MultipartEncoder from requests_toolbelt import MultipartEncoder, MultipartEncoderMonitor
import requests import requests
logger = logging.getLogger(__name__) logger = logging.getLogger(__name__)
...@@ -268,50 +267,97 @@ class Disk(object): ...@@ -268,50 +267,97 @@ class Disk(object):
raise Exception("Invalid file format. Only qcow and " raise Exception("Invalid file format. Only qcow and "
"iso files are allowed. Image from: %s" % url) "iso files are allowed. Image from: %s" % url)
def import_disk(self, url): def import_disk(self, task, url, parent_id):
r = requests.get(url, stream=True) r = requests.get(url, stream=True)
clen = int(r.headers.get('content-length'))
downloaded_file = os.path.join(self.dir, url.split('/')[-1]) downloaded_file = os.path.join(self.dir, url.split('/')[-1])
with open(downloaded_file, 'wb') as f: percent = 0
for chunk in r.iter_content(chunk_size=8192): try:
f.write(chunk) with open(downloaded_file, 'wb') as f:
for chunk in r.iter_content(chunk_size=256 * 1024):
f.write(chunk)
current_size = f.tell()
new_percent = current_size * 100 / clen
if task.is_aborted():
raise AbortException()
if new_percent > percent:
percent = new_percent
task.update_state(
task_id=parent_id,
state=task.AsyncResult(parent_id).state,
meta={'percent': percent}
)
with magic.Magic() as m: with magic.Magic() as m:
ftype = m.id_filename(downloaded_file) ftype = m.id_filename(downloaded_file)
if 'qcow' in ftype.lower(): if 'qcow' in ftype.lower():
shutil.move(downloaded_file, self.get_path()) move(downloaded_file, self.get_path())
else:
cmdline = ['qemu-img',
'convert',
'-O', 'qcow2',
downloaded_file,
self.get_path()]
subprocess.check_output(cmdline)
except AbortException:
os.unlink(downloaded_file)
if os.path.exists(self.get_path()):
os.unlink(self.get_path())
logger.info("Import of disk %s aborted" % self.name)
except:
os.unlink(downloaded_file)
if os.path.exists(self.get_path()):
os.unlink(self.get_path())
raise
else: else:
cmdline = ['qemu-img',
'convert',
'-O', 'qcow2',
downloaded_file,
self.get_path()]
subprocess.check_output(cmdline)
os.unlink(downloaded_file) os.unlink(downloaded_file)
if not self.check_valid_image(): if not self.check_valid_image():
os.unlink(self.get_path()) os.unlink(self.get_path())
raise Exception("Invalid file format.") raise Exception("Invalid file format.")
self.size = Disk.get(self.dir, self.name).size self.size = Disk.get(self.dir, self.name).size
def export(self, format, exported_name, upload_link): def export(self, task, disk_format, exported_name, upload_link, parent_id):
exported_path = self.get_path() + '.' + format exported_path = self.get_path() + '.' + disk_format
cmdline = ['qemu-img', cmdline = ['qemu-img',
'convert', 'convert',
'-O', format, '-O', disk_format,
self.get_path(), self.get_path(),
exported_path] exported_path]
subprocess.check_output(cmdline) subprocess.check_output(cmdline)
size = os.path.getsize(exported_path)
percent = [0]
def update_state(monitor):
new_percent = monitor.bytes_read * 100 / size
if task.is_aborted():
raise AbortException()
if new_percent > percent[0]:
percent[0] = new_percent
task.update_state(
task_id=parent_id,
state=task.AsyncResult(parent_id).state,
meta={'percent': percent[0]}
)
with open(exported_path, 'rb') as exported_disk: with open(exported_path, 'rb') as exported_disk:
try: try:
m = MultipartEncoder( e = MultipartEncoder(
{'data': (exported_name + '.' + format, {'data': (exported_name + '.' + disk_format,
exported_disk)} exported_disk,
'application/octet-stream')}
) )
m = MultipartEncoderMonitor(e, update_state)
# Force the read function to read more than 8192 bytes,
# which is a hardcoded value in httplib. This increases
# the upload speed. See:
# https://github.com/requests/toolbelt/issues/75
m._read = m.read
m.read = lambda _: m._read(1024 * 1024)
response = requests.post( response = requests.post(
upload_link, upload_link,
data=m, data=m,
......
storagedriver.py
...@@ -41,17 +41,32 @@ class download(AbortableTask): ...@@ -41,17 +41,32 @@ class download(AbortableTask):
'checksum': disk.checksum, } 'checksum': disk.checksum, }
@celery.task() class import_disk(AbortableTask):
def import_disk(disk_desc, url): time_limit = 18000
disk = Disk.deserialize(disk_desc)
disk.import_disk(url)
return disk.size
def run(self, **kwargs):
disk_desc = kwargs["disk_desc"]
url = kwargs["url"]
parent_id = kwargs["task"]
disk = Disk.deserialize(disk_desc)
disk.import_disk(self, url, parent_id)
return {
"size": disk.size,
"checksum": disk.checksum
}
@celery.task()
def export(disk_desc, format, exported_name, upload_link): class export_disk(AbortableTask):
disk = Disk.deserialize(disk_desc) time_limit = 18000
disk.export(format, exported_name, upload_link)
def run(self, **kwargs):
disk_desc = kwargs["disk_desc"]
disk_format = kwargs["disk_format"]
exported_name = kwargs["exported_name"]
upload_link = kwargs["upload_link"]
parent_id = kwargs["task"]
disk = Disk.deserialize(disk_desc)
disk.export(self, disk_format, exported_name, upload_link, parent_id)
@celery.task() @celery.task()
......
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