* [ANN] yahns 1.12.0 -_- sleepy app server for Ruby
@ 2016-02-14 22:37 Eric Wong
2016-02-15 6:00 ` Eric Wong
2016-02-22 0:43 ` [ANN] yahns 1.12.1 " Eric Wong
0 siblings, 2 replies; 4+ messages in thread
From: Eric Wong @ 2016-02-14 22:37 UTC (permalink / raw)
To: ruby-talk, yahns-public
A Free Software, multi-threaded, non-blocking network
application server designed for low _idle_ power consumption.
It is primarily optimized for applications with occasional users
which see little or no traffic. yahns currently hosts Rack/HTTP
applications, but may eventually support other application
types. Unlike some existing servers, yahns is extremely
sensitive to fatal bugs in the applications it hosts.
Changes:
yahns 1.12.0 - TLS fixes and more!
Most notably, serving static files over HTTPS did not work
before this release with the "sendfile" gem installed. The
yahns_config(5) manpage is also updated with an example for
using OpenSSL::SSL::SSLContext objects. Users of
Rack::Request#scheme and env['rack.url_scheme'] should see
"https" properly set for HTTPS connections.
There's also a bunch of internal tweaks like taking advantage of
the file-level frozen_string_literal: directive in 2.3 and
explicitly clearing short-lived string buffers
TLS support is still in its early stages, but I'm experimenting
with Let's Encrypt (via getssl[1]) and hosting https://YHBT.net/
on it.
For now, I suggest using a separate yahns instance (with a
different master process) to avoid any potential data leaks
between HTTPS and HTTP instances. In the future, it may be
possible to isolate HTTPS from HTTP at the worker process level.
Supporting GnuTLS (alongside OpenSSL) may be in our future, too.
To paraphrase the warning in http://www.postfix.org/TLS_README.html
(which was written before Heartbleed):
WARNING
By turning on TLS support in yahns, you not only get the
ability to encrypt traffic and to authenticate remote
clients. You also turn on thousands and thousands of
lines of OpenSSL library code. Assuming that OpenSSL is
written as carefully as Eric's own code, every 1000 lines
introduce one additional bug into yahns.
I'm not nearly as careful with yahns as Wietse is with postfix,
either.
20 changes since v1.11.0:
README: updates for kqueue
add .gitattributes for Ruby method detection
nodoc internals
enable frozen_string_literal for Ruby 2.3+
copyright updates for 2016
extras/exec_cgi: fix frozen string error on slow responses
avoid StringIO#binmode for the next few years
use String#clear for short-lived buffers we create
gemspec: make rack a development dependency
build: install-gem forced to "--local" domain
acceptor: all subclasses of TCPServer use TCP_INFO
properly emulate sendfile for OpenSSL sockets
avoid race conditions in OpenSSL::SSL::SSLContext#setup
set HTTPS and rack.url_scheme in Rack env as appropriate
proxy_pass: pass X-Forwarded-Proto through
doc: switch to perlpod (from pandoc-flavored Markdown)
doc: trim down documentation slightly
doc: document ssl_ctx for "listen" directive
doc: various doc and linkification improvements
http_context: reduce constant lookup + bytecode
[1] git clone https://github.com/srvrco/getssl.git
Please note the disclaimer:
yahns is extremely sensitive to fatal bugs in the apps it hosts. There
is no (and never will be) any built-in "watchdog"-type feature to kill
stuck processes/threads. Each yahns process may be handling thousands
of clients; unexpectedly killing the process will abort _all_ of those
connections. Lives may be lost!
yahns hackers are not responsible for your application/library bugs.
Use an application server which is tolerant of buggy applications
if you cannot be bothered to fix all your fatal bugs.
* git clone git://yhbt.net/yahns
* http://yahns.yhbt.net/README
* http://yahns.yhbt.net/NEWS.atom.xml
* we only accept plain-text email yahns-public@yhbt.net
* and archive all the mail we receive: http://yhbt.net/yahns-public/
* nntp://news.public-inbox.org/inbox.comp.lang.ruby.yahns
^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: [ANN] yahns 1.12.0 -_- sleepy app server for Ruby
2016-02-14 22:37 [ANN] yahns 1.12.0 -_- sleepy app server for Ruby Eric Wong
@ 2016-02-15 6:00 ` Eric Wong
2016-02-22 0:43 ` [ANN] yahns 1.12.1 " Eric Wong
1 sibling, 0 replies; 4+ messages in thread
From: Eric Wong @ 2016-02-15 6:00 UTC (permalink / raw)
To: ruby-talk, yahns-public
Eric Wong <normalperson@yhbt.net> wrote:
> proxy_pass: pass X-Forwarded-Proto through
Note: proxy_pass is still broken with TLS because SSL_write
seems picky about getting EXACTLY the same args it got the
first time around when it got SSL_ERROR_WANT_{WRITE,READ}.
So it looks like packetized buffering is necessary for fast
upstreams and slow TLS clients.
^ permalink raw reply [flat|nested] 4+ messages in thread
* [ANN] yahns 1.12.1 -_- sleepy app server for Ruby
2016-02-14 22:37 [ANN] yahns 1.12.0 -_- sleepy app server for Ruby Eric Wong
2016-02-15 6:00 ` Eric Wong
@ 2016-02-22 0:43 ` Eric Wong
2016-03-01 1:58 ` [ANN] yahns 1.12.2 " Eric Wong
1 sibling, 1 reply; 4+ messages in thread
From: Eric Wong @ 2016-02-22 0:43 UTC (permalink / raw)
To: ruby-talk, yahns-public
A Free Software, multi-threaded, non-blocking network
application server designed for low _idle_ power consumption.
It is primarily optimized for applications with occasional users
which see little or no traffic. yahns currently hosts Rack/HTTP
applications, but may eventually support other application
types. Unlike some existing servers, yahns is extremely
sensitive to fatal bugs in the applications it hosts.
Changes:
yahns 1.12.1 - more TLS fixes
Most notably release fixes TLS output buffering for large
responses to slow clients. For Rack HTTPS users,
env['SERVER_PORT'] also defaults to 443 properly unless the
Host: request header specifies differently.
Also, the extras/autoindex change is to make our own directory
listing look nicer as we use Let's Encrypt and don't want to
waste space listing ".well-known/" directory contents on:
https://yahns.yhbt.net/
Yes, we really do care how our homepage looks!
6 changes since v1.12.0:
extras/autoindex: support hiding dotfiles
fix output buffering with SSL_write
https: ensure SERVER_PORT defaults to 443
test_ssl: check SERVER_PORT when parsed from Host: header
doc: mention kqueue/kevent alongside epoll
doc: more minor updates
Please note the disclaimer:
yahns is extremely sensitive to fatal bugs in the apps it hosts. There
is no (and never will be) any built-in "watchdog"-type feature to kill
stuck processes/threads. Each yahns process may be handling thousands
of clients; unexpectedly killing the process will abort _all_ of those
connections. Lives may be lost!
yahns hackers are not responsible for your application/library bugs.
Use an application server which is tolerant of buggy applications
if you cannot be bothered to fix all your fatal bugs.
* git clone git://yhbt.net/yahns
* http://yahns.yhbt.net/README
* http://yahns.yhbt.net/NEWS.atom.xml
* we only accept plain-text email yahns-public@yhbt.net
* and archive all the mail we receive: http://yhbt.net/yahns-public/
* nntp://news.public-inbox.org/inbox.comp.lang.ruby.yahns
^ permalink raw reply [flat|nested] 4+ messages in thread
* [ANN] yahns 1.12.2 -_- sleepy app server for Ruby
2016-02-22 0:43 ` [ANN] yahns 1.12.1 " Eric Wong
@ 2016-03-01 1:58 ` Eric Wong
0 siblings, 0 replies; 4+ messages in thread
From: Eric Wong @ 2016-03-01 1:58 UTC (permalink / raw)
To: ruby-talk, yahns-public
A Free Software, multi-threaded, non-blocking network
application server designed for low _idle_ power consumption.
It is primarily optimized for applications with occasional users
which see little or no traffic. yahns currently hosts Rack/HTTP
applications, but may eventually support other application
types. Unlike some existing servers, yahns is extremely
sensitive to fatal bugs in the applications it hosts.
Changes:
yahns 1.12.2 - minor doc and TLS fixes
This release ensures OpenSSL::SSL::SSLContext#session_id_context
is always set for OpenSSL users. It won't overwrite existing
settings, but setting it to a random value is necessary to
ensure clients do not get aborted connections when attempting to
use a session cache.
No need to actually upgrade if you're on 1.12.1, you may add the
following to your yahns_config(5) file where
OpenSSL::SSL::SSLContext is configured:
# recommended, not required. This sets safer defaults
# provided by Ruby on top of what OpenSSL gives:
ssl_ctx.set_params
# required, and done by default in v1.12.2:
ssl_ctx.session_id_context ||= OpenSSL::Random.random_bytes(32)
yahns gives you full control of of how OpenSSL::SSL::SSLContext is
configured. To avoid bugs, yahns only ensures
OpenSSL::SSL::SSLContext#session_id_context is set (if not previously
set by the user) and calls OpenSSL::SSL::SSLContext#setup before
spawning threads to avoid race conditions. yahns itself does not and
will not enforce any opinion on the compatibility/performance/security
trade-offs regarding TLS configuration.
Note: keep in mind using an SSL session cache may be less useful
with yahns because HTTP/1.1 persistent connections may live
forever :)
3 bug/doc fixes on top of v1.12.1:
document OpenSSL::SSL::SSLContext#set_params use
ssl: ensure is session_id_context is always set
test/*: fix mktmpdir usage for 1.9.3
Please note the disclaimer:
yahns is extremely sensitive to fatal bugs in the apps it hosts. There
is no (and never will be) any built-in "watchdog"-type feature to kill
stuck processes/threads. Each yahns process may be handling thousands
of clients; unexpectedly killing the process will abort _all_ of those
connections. Lives may be lost!
yahns hackers are not responsible for your application/library bugs.
Use an application server which is tolerant of buggy applications
if you cannot be bothered to fix all your fatal bugs.
* git clone git://yhbt.net/yahns
* http://yahns.yhbt.net/README
* http://yahns.yhbt.net/NEWS.atom.xml
* we only accept plain-text email yahns-public@yhbt.net
* and archive all the mail we receive: http://yhbt.net/yahns-public/
* nntp://news.public-inbox.org/inbox.comp.lang.ruby.yahns
^ permalink raw reply [flat|nested] 4+ messages in thread
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2016-02-14 22:37 [ANN] yahns 1.12.0 -_- sleepy app server for Ruby Eric Wong
2016-02-15 6:00 ` Eric Wong
2016-02-22 0:43 ` [ANN] yahns 1.12.1 " Eric Wong
2016-03-01 1:58 ` [ANN] yahns 1.12.2 " Eric Wong
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