def iterate(*args):
for n in range(1, globals.num_retries):
try:
return fn(*args)
except Exception, e:
log.Warn("Attempt %s failed. %s: %s"
% (n, e.__class__.__name__, str(e)))
log.Debug("Backtrace of previous error: %s"
% exception_traceback())
time.sleep(10) # wait a bit before trying again
def iterate(*args):
for n in range(1, globals.num_retries):
try:
kwargs = {"raise_errors": True}
return fn(*args, **kwargs)
except Exception, e:
log.Warn("Attempt %s failed: %s: %s" %
(n, e.__class__.__name__, str(e)))
log.Debug("Backtrace of previous error: %s" %
exception_traceback())
if isinstance(e, TemporaryLoadException):
time.sleep(30) # wait a bit before trying again
def iterate(*args):
for n in range(1, globals.num_retries):
try:
kwargs = {"raise_errors": True}
return fn(*args, **kwargs)
except Exception, e:
log.Warn(_("Attempt %s failed: %s: %s") % (n, e.__class__.__name__, util.uexc(e)))
log.Debug(_("Backtrace of previous error: %s") % exception_traceback())
if isinstance(e, TemporaryLoadException):
time.sleep(30) # wait longer before trying again
else:
time.sleep(10) # wait a bit before trying again
def list(self):
for n in range(1, globals.num_retries+1):
log.Info("Listing '%s'" % (self.container))
try:
keys = self.container.list_objects()
return keys
except self.resp_exc, resperr:
log.Warn("Listing of '%s' failed (attempt %s): CloudFiles returned: %s %s"
% (self.container, n, resperr.status, resperr.reason))
except Exception, e:
log.Warn("Listing of '%s' failed (attempt %s): %s: %s"
% (self.container, n, e.__class__.__name__, str(e)))
log.Debug("Backtrace of previous error: %s"
% exception_traceback())
def inner_retry(self, *args):
for n in range(1, globals.num_retries + 1):
try:
return fn(self, *args)
except FatalBackendException as e:
# die on fatal errors
raise e
except Exception as e:
# retry on anything else
log.Debug(
_(u"Backtrace of previous error: %s") %
exception_traceback())
at_end = n == globals.num_retries
code = _get_code_from_exception(self.backend, operation, e)
if code == log.ErrorCode.backend_not_found:
# If we tried to do something, but the file just isn't there,
# no need to retry.
at_end = True
if at_end and fatal:
def make_filename(f):
if isinstance(f, path.ROPath):
return util.escape(f.uc_name)
else:
return util.escape(f)
extra = u' '.join([operation] + [
make_filename(x)
for x in args if (x and isinstance(x, str))
])
raise
log.FatalError(
_(u"Giving up after %s attempts. %s: %s") %
(n, e.__class__.__name__, util.uexc(e)),
code=code,
extra=extra)
else:
log.Warn(
_(u"Attempt %s failed. %s: %s") %
(n, e.__class__.__name__, util.uexc(e)))
if not at_end:
if isinstance(e, TemporaryLoadException):
time.sleep(3 * globals.backend_retry_delay
) # wait longer before trying again
else:
time.sleep(globals.backend_retry_delay
) # wait a bit before trying again
if hasattr(self.backend, u'_retry_cleanup'):
self.backend._retry_cleanup()
def _retry_fatal(self, *args):
try:
n = 0
for n in range(1, globals.num_retries):
try:
self.retry_count = n
return fn(self, *args)
except FatalBackendError, e:
# die on fatal errors
raise e
except Exception, e:
# retry on anything else
log.Warn(_("Attempt %s failed. %s: %s") % (n, e.__class__.__name__, util.uexc(e)))
log.Debug(_("Backtrace of previous error: %s") % exception_traceback())
time.sleep(10) # wait a bit before trying again
def list(self):
for n in range(1, globals.num_retries+1):
log.Info("Listing '%s'" % (self.container))
try:
# Cloud Files will return a max of 10,000 objects. We have
# to make multiple requests to get them all.
headers, objs = self.conn.get_container(self.container)
return [ o['name'] for o in objs ]
except self.resp_exc, resperr:
log.Warn("Listing of '%s' failed (attempt %s): Swift server returned: %s %s"
% (self.container, n, resperr.http_status, resperr.message))
except Exception, e:
log.Warn("Listing of '%s' failed (attempt %s): %s: %s"
% (self.container, n, e.__class__.__name__, str(e)))
log.Debug("Backtrace of previous error: %s"
% exception_traceback())
def _retry_fatal(self, *args):
try:
n = 0
for n in range(1, globals.num_retries):
try:
self.retry_count = n
return fn(self, *args)
except FatalBackendError, e:
# die on fatal errors
raise e
except Exception, e:
# retry on anything else
log.Warn("Attempt %s failed. %s: %s" %
(n, e.__class__.__name__, str(e)))
log.Debug("Backtrace of previous error: %s" %
exception_traceback())
time.sleep(10) # wait a bit before trying again
def put(self, source_path, remote_filename = None):
if not remote_filename:
remote_filename = source_path.get_filename()
for n in range(1, globals.num_retries + 1):
log.Info("Uploading '%s/%s' " % (self.container, remote_filename))
try:
self.container.upload_file(source_path.name, remote_filename)
return
except self.client_exc, error:
log.Warn("Upload of '%s' failed (attempt %d): pyrax returned: %s %s"
% (remote_filename, n, error.__class__.__name__, error.message))
except Exception, e:
log.Warn("Upload of '%s' failed (attempt %s): %s: %s"
% (remote_filename, n, e.__class__.__name__, str(e)))
log.Debug("Backtrace of previous error: %s"
% exception_traceback())
def put(self, source_path, remote_filename = None):
if not remote_filename:
remote_filename = source_path.get_filename()
for n in range(1, globals.num_retries+1):
log.Info("Uploading '%s/%s' " % (self.container, remote_filename))
try:
sobject = self.container.create_object(remote_filename)
sobject.load_from_filename(source_path.name)
return
except self.resp_exc, error:
log.Warn("Upload of '%s' failed (attempt %d): CloudFiles returned: %s %s"
% (remote_filename, n, error.status, error.reason))
except Exception, e:
log.Warn("Upload of '%s' failed (attempt %s): %s: %s"
% (remote_filename, n, e.__class__.__name__, str(e)))
log.Debug("Backtrace of previous error: %s"
% exception_traceback())
def _list(self):
if not self.bucket:
raise BackendException("No connection to backend")
for n in range(1, globals.num_retries+1):
if n > 1:
# sleep before retry
time.sleep(30)
log.Info("Listing %s" % self.straight_url)
try:
return self._list_filenames_in_bucket()
except Exception, e:
log.Warn("List %s failed (attempt #%d, reason: %s: %s)"
"" % (self.straight_url,
n,
e.__class__.__name__,
str(e)), 1)
log.Debug("Backtrace of previous error: %s" % (exception_traceback(),))
def put(self, source_path, remote_filename = None):
if not remote_filename:
remote_filename = source_path.get_filename()
for n in range(1, globals.num_retries+1):
log.Info("Uploading '%s/%s' " % (self.container, remote_filename))
try:
sobject = self.container.create_object(remote_filename)
sobject.load_from_filename(source_path.name)
return
except self.resp_exc, error:
log.Warn("Upload of '%s' failed (attempt %d): CloudFiles returned: %s %s"
% (remote_filename, n, error.status, error.reason))
except Exception, e:
log.Warn("Upload of '%s' failed (attempt %s): %s: %s"
% (remote_filename, n, e.__class__.__name__, str(e)))
log.Debug("Backtrace of previous error: %s"
% exception_traceback())
def _list(self):
if not self.bucket:
raise BackendException("No connection to backend")
for n in range(1, globals.num_retries+1):
if n > 1:
# sleep before retry
time.sleep(30)
log.Info("Listing %s" % self.straight_url)
try:
return self._list_filenames_in_bucket()
except Exception, e:
log.Warn("List %s failed (attempt #%d, reason: %s: %s)"
"" % (self.straight_url,
n,
e.__class__.__name__,
str(e)), 1)
log.Debug("Backtrace of previous error: %s" % (exception_traceback(),))
def get(self, remote_filename, local_path):
for n in range(1, globals.num_retries+1):
log.Info("Downloading '%s/%s'" % (self.container, remote_filename))
try:
sobject = self.container.create_object(remote_filename)
f = open(local_path.name, 'w')
for chunk in sobject.stream():
f.write(chunk)
local_path.setdata()
return
except self.resp_exc, resperr:
log.Warn("Download of '%s' failed (attempt %s): CloudFiles returned: %s %s"
% (remote_filename, n, resperr.status, resperr.reason))
except Exception, e:
log.Warn("Download of '%s' failed (attempt %s): %s: %s"
% (remote_filename, n, e.__class__.__name__, str(e)))
log.Debug("Backtrace of previous error: %s"
% exception_traceback())
def list(self):
for n in range(1, globals.num_retries + 1):
log.Info("Listing '%s'" % (self.container))
try:
# Cloud Files will return a max of 10,000 objects. We have
# to make multiple requests to get them all.
headers, objs = self.conn.get_container(self.container)
return [o['name'] for o in objs]
except self.resp_exc, resperr:
log.Warn(
"Listing of '%s' failed (attempt %s): Swift server returned: %s %s"
%
(self.container, n, resperr.http_status, resperr.message))
except Exception, e:
log.Warn("Listing of '%s' failed (attempt %s): %s: %s" %
(self.container, n, e.__class__.__name__, str(e)))
log.Debug("Backtrace of previous error: %s" %
exception_traceback())
def get(self, remote_filename, local_path):
for n in range(1, globals.num_retries+1):
log.Info("Downloading '%s/%s'" % (self.container, remote_filename))
try:
sobject = self.container.create_object(remote_filename)
f = open(local_path.name, 'w')
for chunk in sobject.stream():
f.write(chunk)
local_path.setdata()
return
except self.resp_exc, resperr:
log.Warn("Download of '%s' failed (attempt %s): CloudFiles returned: %s %s"
% (remote_filename, n, resperr.status, resperr.reason))
except Exception, e:
log.Warn("Download of '%s' failed (attempt %s): %s: %s"
% (remote_filename, n, e.__class__.__name__, str(e)))
log.Debug("Backtrace of previous error: %s"
% exception_traceback())
def delete_one(self, remote_filename):
for n in range(1, globals.num_retries + 1):
log.Info("Deleting '%s/%s'" % (self.container, remote_filename))
try:
self.container.delete_object(remote_filename)
return
except self.client_exc, resperr:
if n > 1 and resperr.status == 404:
# We failed on a timeout, but delete succeeded on the server
log.Warn("Delete of '%s' missing after retry - must have succeded earler" % remote_filename)
return
log.Warn("Delete of '%s' failed (attempt %s): pyrax returned: %s %s"
% (remote_filename, n, resperr.__class__.__name__, resperr.message))
except Exception, e:
log.Warn("Delete of '%s' failed (attempt %s): %s: %s"
% (remote_filename, n, e.__class__.__name__, str(e)))
log.Debug("Backtrace of previous error: %s"
% exception_traceback())
def get(self, remote_filename, local_path):
for n in range(1, globals.num_retries + 1):
log.Info("Downloading '%s/%s'" % (self.container, remote_filename))
try:
sobject = self.container.get_object(remote_filename)
f = open(local_path.name, 'w')
f.write(sobject.get())
local_path.setdata()
return
except self.nso_exc:
return
except self.client_exc, resperr:
log.Warn("Download of '%s' failed (attempt %s): pyrax returned: %s %s"
% (remote_filename, n, resperr.__class__.__name__, resperr.message))
except Exception, e:
log.Warn("Download of '%s' failed (attempt %s): %s: %s"
% (remote_filename, n, e.__class__.__name__, str(e)))
log.Debug("Backtrace of previous error: %s"
% exception_traceback())
def pre_process_download(self, files_to_download, wait=False):
# Used primarily to move files in Glacier to S3
if isinstance(files_to_download, basestring):
files_to_download = [files_to_download]
for remote_filename in files_to_download:
success = False
for n in range(1, globals.num_retries+1):
if n > 1:
# sleep before retry (new connection to a **hopeful** new host, so no need to wait so long)
time.sleep(10)
self.resetConnection()
try:
key_name = self.key_prefix + remote_filename
if not self._listed_keys.get(key_name, False):
self._listed_keys[key_name] = list(self.bucket.list(key_name))[0]
key = self._listed_keys[key_name]
if key.storage_class == "GLACIER":
# We need to move the file out of glacier
if not self.bucket.get_key(key.key).ongoing_restore:
log.Info("File %s is in Glacier storage, restoring to S3" % remote_filename)
key.restore(days=1) # Shouldn't need this again after 1 day
if wait:
log.Info("Waiting for file %s to restore from Glacier" % remote_filename)
while self.bucket.get_key(key.key).ongoing_restore:
time.sleep(60)
self.resetConnection()
log.Info("File %s was successfully restored from Glacier" % remote_filename)
success = True
break
except Exception, e:
log.Warn("Restoration from Glacier for file %s/%s failed (attempt #%d, reason: %s: %s)"
"" % (self.straight_url,
remote_filename,
n,
e.__class__.__name__,
str(e)), 1)
log.Debug("Backtrace of previous error: %s" % (exception_traceback(),))
if not success:
log.Warn("Giving up trying to restore %s/%s after %d attempts" %
(self.straight_url, remote_filename, globals.num_retries))
raise BackendException("Error restoring %s/%s from Glacier to S3" % (self.straight_url, remote_filename))
def get(self, remote_filename, local_path):
for n in range(1, globals.num_retries+1):
log.Info("Downloading '%s/%s'" % (self.container, remote_filename))
try:
headers, body = self.conn.get_object(self.container,
remote_filename)
f = open(local_path.name, 'w')
for chunk in body:
f.write(chunk)
local_path.setdata()
return
except self.resp_exc, resperr:
log.Warn("Download of '%s' failed (attempt %s): Swift server returned: %s %s"
% (remote_filename, n, resperr.http_status, resperr.message))
except Exception, e:
log.Warn("Download of '%s' failed (attempt %s): %s: %s"
% (remote_filename, n, e.__class__.__name__, str(e)))
log.Debug("Backtrace of previous error: %s"
% exception_traceback())
def _list(self):
for n in range(1, globals.num_retries + 1):
log.Info("Listing '%s'" % (self.container))
try:
# Cloud Files will return a max of 10,000 objects. We have
# to make multiple requests to get them all.
objs = self.container.get_object_names()
keys = objs
while len(objs) == 10000:
objs = self.container.get_object_names(marker = keys[-1])
keys += objs
return keys
except self.client_exc, resperr:
log.Warn("Listing of '%s' failed (attempt %s): pyrax returned: %s %s"
% (self.container, n, resperr.__class__.__name__, resperr.message))
except Exception, e:
log.Warn("Listing of '%s' failed (attempt %s): %s: %s"
% (self.container, n, e.__class__.__name__, str(e)))
log.Debug("Backtrace of previous error: %s"
% exception_traceback())
def retry_fatal(fn):
def iterate(*args):
for n in range(1, globals.num_retries):
try:
return fn(*args)
except Exception, e:
log.Warn("Attempt %s failed. %s: %s"
% (n, e.__class__.__name__, str(e)))
log.Debug("Backtrace of previous error: %s"
% exception_traceback())
time.sleep(10) # wait a bit before trying again
# final trial, die on exception
try:
return fn(*args)
except Exception, e:
log.FatalError("Giving up after %s attempts. %s: %s"
% (globals.num_retries, e.__class__.__name__, str(e)),
log.ErrorCode.backend_error)
log.Debug("Backtrace of previous error: %s"
% exception_traceback())
def get(self, remote_filename, local_path):
for n in range(1, globals.num_retries + 1):
log.Info("Downloading '%s/%s'" % (self.container, remote_filename))
try:
headers, body = self.conn.get_object(self.container,
remote_filename)
f = open(local_path.name, 'w')
for chunk in body:
f.write(chunk)
local_path.setdata()
return
except self.resp_exc, resperr:
log.Warn(
"Download of '%s' failed (attempt %s): Swift server returned: %s %s"
%
(remote_filename, n, resperr.http_status, resperr.message))
except Exception, e:
log.Warn("Download of '%s' failed (attempt %s): %s: %s" %
(remote_filename, n, e.__class__.__name__, str(e)))
log.Debug("Backtrace of previous error: %s" %
exception_traceback())
def get(self, remote_filename, local_path):
key = self.key_class(self.bucket)
key.key = self.key_prefix + remote_filename
for n in range(1, globals.num_retries+1):
if n > 1:
# sleep before retry (new connection to a **hopeful** new host, so no need to wait so long)
time.sleep(10)
log.Info("Downloading %s/%s" % (self.straight_url, remote_filename))
try:
key.get_contents_to_filename(local_path.name)
local_path.setdata()
self.resetConnection()
return
except Exception, e:
log.Warn("Download %s/%s failed (attempt #%d, reason: %s: %s)"
"" % (self.straight_url,
remote_filename,
n,
e.__class__.__name__,
str(e)), 1)
log.Debug("Backtrace of previous error: %s" % (exception_traceback(),))
self.resetConnection()
def get(self, remote_filename, local_path):
key = self.key_class(self.bucket)
key.key = self.key_prefix + remote_filename
for n in range(1, globals.num_retries+1):
if n > 1:
# sleep before retry (new connection to a **hopeful** new host, so no need to wait so long)
time.sleep(10)
log.Info("Downloading %s/%s" % (self.straight_url, remote_filename))
try:
key.get_contents_to_filename(local_path.name)
local_path.setdata()
self.resetConnection()
return
except Exception, e:
log.Warn("Download %s/%s failed (attempt #%d, reason: %s: %s)"
"" % (self.straight_url,
remote_filename,
n,
e.__class__.__name__,
str(e)), 1)
log.Debug("Backtrace of previous error: %s" % (exception_traceback(),))
self.resetConnection()
def inner_retry(self, *args):
for n in range(1, globals.num_retries + 1):
try:
return fn(self, *args)
except FatalBackendException as e:
# die on fatal errors
raise e
except Exception as e:
# retry on anything else
log.Debug(_("Backtrace of previous error: %s")
% exception_traceback())
at_end = n == globals.num_retries
code = _get_code_from_exception(self.backend, operation, e)
if code == log.ErrorCode.backend_not_found:
# If we tried to do something, but the file just isn't there,
# no need to retry.
at_end = True
if at_end and fatal:
def make_filename(f):
if isinstance(f, path.ROPath):
return util.escape(f.name)
else:
return util.escape(f)
extra = ' '.join([operation] + [make_filename(x) for x in args if x])
log.FatalError(_("Giving up after %s attempts. %s: %s")
% (n, e.__class__.__name__,
util.uexc(e)), code=code, extra=extra)
else:
log.Warn(_("Attempt %s failed. %s: %s")
% (n, e.__class__.__name__, util.uexc(e)))
if not at_end:
if isinstance(e, TemporaryLoadException):
time.sleep(3 * globals.backend_retry_delay) # wait longer before trying again
else:
time.sleep(globals.backend_retry_delay) # wait a bit before trying again
if hasattr(self.backend, '_retry_cleanup'):
self.backend._retry_cleanup()
class BotoBackend(duplicity.backend.Backend):
"""
Backend for Amazon's Simple Storage System, (aka Amazon S3), though
the use of the boto module, (http://code.google.com/p/boto/).
To make use of this backend you must set aws_access_key_id
and aws_secret_access_key in your ~/.boto or /etc/boto.cfg
with your Amazon Web Services key id and secret respectively.
Alternatively you can export the environment variables
AWS_ACCESS_KEY_ID and AWS_SECRET_ACCESS_KEY.
"""
def __init__(self, parsed_url):
duplicity.backend.Backend.__init__(self, parsed_url)
import boto
assert boto.Version >= BOTO_MIN_VERSION
# This folds the null prefix and all null parts, which means that:
# //MyBucket/ and //MyBucket are equivalent.
# //MyBucket//My///My/Prefix/ and //MyBucket/My/Prefix are equivalent.
self.url_parts = filter(lambda x: x != '', parsed_url.path.split('/'))
if self.url_parts:
self.bucket_name = self.url_parts.pop(0)
else:
# Duplicity hangs if boto gets a null bucket name.
# HC: Caught a socket error, trying to recover
raise BackendException('Boto requires a bucket name.')
self.scheme = parsed_url.scheme
if self.url_parts:
self.key_prefix = '%s/' % '/'.join(self.url_parts)
else:
self.key_prefix = ''
self.straight_url = duplicity.backend.strip_auth_from_url(parsed_url)
self.parsed_url = parsed_url
# duplicity and boto.storage_uri() have different URI formats.
# boto uses scheme://bucket[/name] and specifies hostname on connect()
self.boto_uri_str = '://'.join((parsed_url.scheme[:2],
parsed_url.path.lstrip('/')))
self.storage_uri = boto.storage_uri(self.boto_uri_str)
self.resetConnection()
def resetConnection(self):
self.bucket = None
self.conn = None
try:
from boto.s3.connection import S3Connection
from boto.s3.key import Key
assert hasattr(S3Connection, 'lookup')
# Newer versions of boto default to using
# virtual hosting for buckets as a result of
# upstream deprecation of the old-style access
# method by Amazon S3. This change is not
# backwards compatible (in particular with
# respect to upper case characters in bucket
# names); so we default to forcing use of the
# old-style method unless the user has
# explicitly asked us to use new-style bucket
# access.
#
# Note that if the user wants to use new-style
# buckets, we use the subdomain calling form
# rather than given the option of both
# subdomain and vhost. The reason being that
# anything addressable as a vhost, is also
# addressable as a subdomain. Seeing as the
# latter is mostly a convenience method of
# allowing browse:able content semi-invisibly
# being hosted on S3, the former format makes
# a lot more sense for us to use - being
# explicit about what is happening (the fact
# that we are talking to S3 servers).
try:
from boto.s3.connection import OrdinaryCallingFormat
from boto.s3.connection import SubdomainCallingFormat
cfs_supported = True
calling_format = OrdinaryCallingFormat()
except ImportError:
cfs_supported = False
calling_format = None
if globals.s3_use_new_style:
if cfs_supported:
calling_format = SubdomainCallingFormat()
else:
log.FatalError("Use of new-style (subdomain) S3 bucket addressing was"
"requested, but does not seem to be supported by the "
"boto library. Either you need to upgrade your boto "
"library or duplicity has failed to correctly detect "
"the appropriate support.",
log.ErrorCode.boto_old_style)
else:
if cfs_supported:
calling_format = OrdinaryCallingFormat()
else:
calling_format = None
except ImportError:
log.FatalError("This backend (s3) requires boto library, version %s or later, "
"(http://code.google.com/p/boto/)." % BOTO_MIN_VERSION,
log.ErrorCode.boto_lib_too_old)
if not self.parsed_url.hostname:
# Use the default host.
self.conn = self.storage_uri.connect(
is_secure=(not globals.s3_unencrypted_connection))
else:
assert self.scheme == 's3'
self.conn = self.storage_uri.connect(
host=self.parsed_url.hostname,
is_secure=(not globals.s3_unencrypted_connection))
if hasattr(self.conn, 'calling_format'):
if calling_format is None:
log.FatalError("It seems we previously failed to detect support for calling "
"formats in the boto library, yet the support is there. This is "
"almost certainly a duplicity bug.",
log.ErrorCode.boto_calling_format)
else:
self.conn.calling_format = calling_format
else:
# Duplicity hangs if boto gets a null bucket name.
# HC: Caught a socket error, trying to recover
raise BackendException('Boto requires a bucket name.')
self.bucket = self.conn.lookup(self.bucket_name)
def put(self, source_path, remote_filename=None):
from boto.s3.connection import Location
if globals.s3_european_buckets:
if not globals.s3_use_new_style:
log.FatalError("European bucket creation was requested, but not new-style "
"bucket addressing (--s3-use-new-style)",
log.ErrorCode.s3_bucket_not_style)
#Network glitch may prevent first few attempts of creating/looking up a bucket
for n in range(1, globals.num_retries+1):
if self.bucket:
break
if n > 1:
time.sleep(30)
try:
try:
self.bucket = self.conn.get_bucket(self.bucket_name, validate=True)
except Exception, e:
if "NoSuchBucket" in str(e):
if globals.s3_european_buckets:
self.bucket = self.conn.create_bucket(self.bucket_name,
location=Location.EU)
else:
self.bucket = self.conn.create_bucket(self.bucket_name)
else:
raise e
except Exception, e:
log.Warn("Failed to create bucket (attempt #%d) '%s' failed (reason: %s: %s)"
"" % (n, self.bucket_name,
e.__class__.__name__,
str(e)))
self.resetConnection()
if not remote_filename:
remote_filename = source_path.get_filename()
key = self.bucket.new_key(self.key_prefix + remote_filename)
for n in range(1, globals.num_retries+1):
if n > 1:
# sleep before retry (new connection to a **hopeful** new host, so no need to wait so long)
time.sleep(10)
if globals.s3_use_rrs:
storage_class = 'REDUCED_REDUNDANCY'
else:
storage_class = 'STANDARD'
log.Info("Uploading %s/%s to %s Storage" % (self.straight_url, remote_filename, storage_class))
try:
key.set_contents_from_filename(source_path.name, {'Content-Type': 'application/octet-stream',
'x-amz-storage-class': storage_class},
cb=progress.report_transfer,
num_cb=(max(2, 8 * globals.volsize / (1024 * 1024)))
) # Max num of callbacks = 8 times x megabyte
key.close()
self.resetConnection()
return
except Exception, e:
log.Warn("Upload '%s/%s' failed (attempt #%d, reason: %s: %s)"
"" % (self.straight_url,
remote_filename,
n,
e.__class__.__name__,
str(e)))
log.Debug("Backtrace of previous error: %s" % (exception_traceback(),))
self.resetConnection()
except FatalBackendError, e:
# die on fatal errors
raise e
except Exception, e:
# retry on anything else
log.Warn("Attempt %s failed. %s: %s" %
(n, e.__class__.__name__, str(e)))
log.Debug("Backtrace of previous error: %s" %
exception_traceback())
time.sleep(10) # wait a bit before trying again
# final trial, die on exception
self.retry_count = n + 1
return fn(self, *args)
except Exception, e:
log.Debug("Backtrace of previous error: %s" %
exception_traceback())
log.FatalError(
"Giving up after %s attempts. %s: %s" %
(self.retry_count, e.__class__.__name__, str(e)),
log.ErrorCode.backend_error)
self.retry_count = 0
return _retry_fatal
class Backend:
"""
Represents a generic duplicity backend, capable of storing and
retrieving files.
Concrete sub-classes are expected to implement:
class BotoBackend(duplicity.backend.Backend):
"""
Backend for Amazon's Simple Storage System, (aka Amazon S3), though
the use of the boto module, (http://code.google.com/p/boto/).
To make use of this backend you must set aws_access_key_id
and aws_secret_access_key in your ~/.boto or /etc/boto.cfg
with your Amazon Web Services key id and secret respectively.
Alternatively you can export the environment variables
AWS_ACCESS_KEY_ID and AWS_SECRET_ACCESS_KEY.
"""
def __init__(self, parsed_url):
duplicity.backend.Backend.__init__(self, parsed_url)
from boto.s3.key import Key
from boto.s3.multipart import MultiPartUpload
# This folds the null prefix and all null parts, which means that:
# //MyBucket/ and //MyBucket are equivalent.
# //MyBucket//My///My/Prefix/ and //MyBucket/My/Prefix are equivalent.
self.url_parts = filter(lambda x: x != '', parsed_url.path.split('/'))
if self.url_parts:
self.bucket_name = self.url_parts.pop(0)
else:
# Duplicity hangs if boto gets a null bucket name.
# HC: Caught a socket error, trying to recover
raise BackendException('Boto requires a bucket name.')
self.scheme = parsed_url.scheme
self.key_class = Key
if self.url_parts:
self.key_prefix = '%s/' % '/'.join(self.url_parts)
else:
self.key_prefix = ''
self.straight_url = duplicity.backend.strip_auth_from_url(parsed_url)
self.parsed_url = parsed_url
self.resetConnection()
def resetConnection(self):
self.bucket = None
self.conn = get_connection(self.scheme, self.parsed_url)
self.bucket = self.conn.lookup(self.bucket_name)
def put(self, source_path, remote_filename=None):
from boto.s3.connection import Location
if globals.s3_european_buckets:
if not globals.s3_use_new_style:
log.FatalError(
"European bucket creation was requested, but not new-style "
"bucket addressing (--s3-use-new-style)",
log.ErrorCode.s3_bucket_not_style)
#Network glitch may prevent first few attempts of creating/looking up a bucket
for n in range(1, globals.num_retries + 1):
if self.bucket:
break
if n > 1:
time.sleep(30)
try:
try:
self.bucket = self.conn.get_bucket(self.bucket_name,
validate=True)
except Exception, e:
if "NoSuchBucket" in str(e):
if globals.s3_european_buckets:
self.bucket = self.conn.create_bucket(
self.bucket_name, location=Location.EU)
else:
self.bucket = self.conn.create_bucket(
self.bucket_name)
else:
raise e
except Exception, e:
log.Warn(
"Failed to create bucket (attempt #%d) '%s' failed (reason: %s: %s)"
"" % (n, self.bucket_name, e.__class__.__name__, str(e)))
self.resetConnection()
if not remote_filename:
remote_filename = source_path.get_filename()
key = self.key_prefix + remote_filename
for n in range(1, globals.num_retries + 1):
if n > 1:
# sleep before retry (new connection to a **hopeful** new host, so no need to wait so long)
time.sleep(10)
if globals.s3_use_rrs:
storage_class = 'REDUCED_REDUNDANCY'
else:
storage_class = 'STANDARD'
log.Info("Uploading %s/%s to %s Storage" %
(self.straight_url, remote_filename, storage_class))
try:
headers = {
'Content-Type': 'application/octet-stream',
'x-amz-storage-class': storage_class
}
self.upload(source_path.name, key, headers)
self.resetConnection()
return
except Exception, e:
log.Warn("Upload '%s/%s' failed (attempt #%d, reason: %s: %s)"
"" % (self.straight_url, remote_filename, n,
e.__class__.__name__, str(e)))
log.Debug("Backtrace of previous error: %s" %
(exception_traceback(), ))
self.resetConnection()
try:
self.retry_count = n
return fn(self, *args)
except FatalBackendError, e:
# die on fatal errors
raise e
except Exception, e:
# retry on anything else
log.Warn(_("Attempt %s failed. %s: %s") % (n, e.__class__.__name__, util.uexc(e)))
log.Debug(_("Backtrace of previous error: %s") % exception_traceback())
time.sleep(10) # wait a bit before trying again
# final trial, die on exception
self.retry_count = n + 1
return fn(self, *args)
except Exception, e:
log.Debug(_("Backtrace of previous error: %s") % exception_traceback())
log.FatalError(
_("Giving up after %s attempts. %s: %s") % (self.retry_count, e.__class__.__name__, util.uexc(e)),
log.ErrorCode.backend_error,
)
self.retry_count = 0
return _retry_fatal
class Backend:
"""
Represents a generic duplicity backend, capable of storing and
retrieving files.
Concrete sub-classes are expected to implement:
except FatalBackendError, e:
# die on fatal errors
raise e
except Exception, e:
# retry on anything else
log.Warn("Attempt %s failed. %s: %s"
% (n, e.__class__.__name__, str(e)))
log.Debug("Backtrace of previous error: %s"
% exception_traceback())
time.sleep(10) # wait a bit before trying again
# final trial, die on exception
self.retry_count = n+1
return fn(self, *args)
except Exception, e:
log.Debug("Backtrace of previous error: %s"
% exception_traceback())
log.FatalError("Giving up after %s attempts. %s: %s"
% (self.retry_count, e.__class__.__name__, str(e)),
log.ErrorCode.backend_error)
self.retry_count = 0
return _retry_fatal
class Backend:
"""
Represents a generic duplicity backend, capable of storing and
retrieving files.
Concrete sub-classes are expected to implement:
- put
raise e
except Exception, e:
# retry on anything else
log.Warn(
_("Attempt %s failed. %s: %s") %
(n, e.__class__.__name__, util.uexc(e)))
log.Debug(
_("Backtrace of previous error: %s") %
exception_traceback())
time.sleep(10) # wait a bit before trying again
# final trial, die on exception
self.retry_count = n + 1
return fn(self, *args)
except Exception, e:
log.Debug(
_("Backtrace of previous error: %s") % exception_traceback())
log.FatalError(
_("Giving up after %s attempts. %s: %s") %
(self.retry_count, e.__class__.__name__, util.uexc(e)),
log.ErrorCode.backend_error)
self.retry_count = 0
return _retry_fatal
class Backend:
"""
Represents a generic duplicity backend, capable of storing and
retrieving files.
Concrete sub-classes are expected to implement:
