Custom SSL handling was introduced because disabling SSL layer compression
provided an approximately five fold performance increase in some
cases. Without SSL layer compression disabled the image transfer would be
CPU bound -- with the CPU performing the DEFLATE algorithm. This would
typically limit image transfers to < 20 MB/s. When --no-ssl-compression
was specified the client would not negotiate any compression algorithm
during the SSL handshake with the server which would remove the CPU
bottleneck and transfers could approach wire speed.
In order to support '--no-ssl-compression' two totally separate code
paths exist depending on whether this is True or False. When SSL
compression is disabled, rather than using the standard 'requests'
library, we enter some custom code based on pyopenssl and httplib in
order to disable compression.
This patch/spec proposes removing the custom code because:
* It is a burden to maintain
Eg adding new code such as keystone session support is more complicated
* It can introduce additional failure modes
We have seen some bugs related to the 'custom' certificate checking
* Newer Operating Systems disable SSL for us.
Eg. While Debian 7 defaulted to compression 'on', Debian 8 has compression
'off'. This makes both servers and client less likely to have compression
enabled.
* Newer combinations of 'requests' and 'python' do this for us
Requests disables compression when backed by a version of python which
supports it (>= 2.7.9). This makes clients more likely to disable
compression out-of-the-box.
* It is (in principle) possible to do this on older versions too
If pyopenssl, ndg-httpsclient and pyasn1 are installed on older
operating system/python combinations, the requests library should
disable SSL compression on the client side.
* Systems that have SSL compression enabled may be vulnerable to the CRIME
(https://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2012-4929) attack.
Installations which are security conscious should be running the Glance
server with SSL disabled.
Full Spec: https://review.openstack.org/#/c/187674
Blueprint: remove-custom-client-ssl-handling
Change-Id: I7e7761fc91b0d6da03939374eeedd809534f6edf
Use oslo.i18n package and handle different versions properly in
glanceclient._i18n. The oslo namespace is being deprecated so imports
will be oslo_i18n going forward. For older versions of oslo.i18n though,
we will still be able to import i18n from oslo.
Change-Id: Id56d34ccf447dc6f7becafb74d6a30e8a1642030
This review implements blueprint python-request and replaces the old
http client implementation in favor of a new one based on
python-requests.
Major changes:
* raw_request and json_request removed since everything is now being
handled by the same method "_request"
* New methods that match HTTP's methods were added:
- get
- put
- post
- head
- patch
- delete
* Content-Type is now being "inferred" based on the data being sent:
- if it is file-like object it chunks the request
- if it is a python type not instance of basestring then it'll try
to serialize it to json
- Every other case will keep the incoming content-type and will send
the data as is.
* Glanceclient's HTTPSConnection implementation will be used if
no-compression flag is set to True.
Co-Author: Flavio Percoco<flaper87@gmail.com>
Change-Id: I09f70eee3e2777f52ce040296015d41649c2586a
if any of the projects specify a capped client, it has the
potential for preventing that client from being tested in the
gate. To fix this we have to uncap maximum versions of all
openstack client code in all openstack projects.
Fixes bug #1200214
Change-Id: I664d2f030972a3bbb08ae1c4b1710816b54b44b2
Rename tools/pip-requires to requirements.txt and tools/test-requires
to test-requirements.txt. These are standard files, and tools in the
general world are growing intelligence about them.
Change-Id: Ic220b54de5ce7c15f442b8ffcb97cd03c2344f9a
Fixes: bug #1179008
OpenStack Proposal Bot