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This release includes small changes for things allowed by Rack
1.1. It is also now easier to detect if daemonized process
fails to start. Manpages received some minor updates as well.
Rack 1.1 allowed us to make the following environment changes:
* "rack.logger" is now set to the "logger" specified in
the Unicorn config file. This defaults to a Logger
instance pointing to $stderr.
* "rack.version" is now at [1,1]. Unicorn remains
compatible with previous Rack versions if your app
depends on it.
While only specified since Rack 1.1, Unicorn has always exposed
"rack.input" in binary mode (and has ridiculous integration
tests that go outside of Ruby to prove it!).
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* rack-1.1:
http_response: disallow blank, multi-value headers
local.mk.sample: use rack-1.1.0
bump "rack.version" env to [1,1]
set env["rack.logger"] for applications
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The HeaderHash optimizations in Rack 1.1 interact badly with
Rails 2.3.5 (and possibly other frameworks/apps) which set
multi-value "Set-Cookie" headers without relying on the proper
methods provided by Rack::Utils.
While this is an issue with Rails not using properly, there
may be similar apps that make this mistake and Rack::Lint
does not guard against it.
Rack-ML-Ref: <20100105235845.GB3377@dcvr.yhbt.net>
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Inspection of the MRI source reveals that IO#sync=true only
appears to only apply for writes. Though it could eventually
make sense to disable read buffering by setting IO#sync=true,
it does not appear to happen.
Of course we never read from $stdin anyways....
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Rainbows! does not yet know about ready_pipe, and will probably
not know about it until Unicorn 0.97.0
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When using multiple listeners, the log messages can be
potentially misleading as to which listener fails to bind:
Before:
INFO -- : unlinking existing socket=/tmp/unicorn.sock
INFO -- : listening on addr=/tmp/unicorn.sock fd=3
unicorn/socket_helper.rb:110:in `initialize': Permission denied - bind(2) (Errno::EACCES)
After:
INFO -- : unlinking existing socket=/tmp/openxdms.sock
INFO -- : listening on addr=/tmp/openxdms.sock fd=3
FATAL -- : error adding listener addr=0.0.0.0:84
unicorn/socket_helper.rb:110:in `initialize': Permission denied - bind(2) (Errno::EACCES)
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Rather than erroring out with a non-descript EOFError,
show a warning message telling users to check the logs
instead.
Reported-by: Iñaki Baz Castillo mid=200912281350.44760.ibc@aliax.net
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Otherwise the original spawner process may not notice the close
as it's still being shared by workers. While we're at it, avoid
confusing the original spawner by using readpartial instead of
sysread.
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This behavior change also means our grandparent (launched
from a controlling terminal or script) will wait until
the master process is ready before returning.
Thanks to Iñaki Baz Castillo for the initial implementations
and inspiration.
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This will match what's in Rack the 1.1.0 release.
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The HTTP parser now allows (but does not parse) the userinfo
component in the very rare requests that send absoluteURIs.
Thanks to Scott Chacon for reporting and submitting a test case
for this fix.
There are also minor documentation updates and tiny cleanups.
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rack.git upstream has it, so it will likely be in Rack 1.1
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Durr....
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Small fixes to our HTTP parser to allows semicolons in PATH_INFO
as allowed by RFC 2396, section 3.3. This is low impact for
existing apps as semicolons are rarely seen in URIs. Our HTTP
parser runs properly under Rubinius 0.13.0 and 1.0.0-rc1 again
(though not yet the rest of the server since we rely heavily on
signals).
Another round of small documentation tweaks and minor cleanups.
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No point in bloating code for an unlikely path (and the memcpy()
vs malloc() tradeoff is debatable...)
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This is allowed according to RFC 2396, section 3.3 and matches
the behavior of URI.parse, as well.
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No point in repeating ourselves and having to deal with nested
comments + indentation in RDoc. It's also easier for users
to just download the file than to copy-and-paste out of a
typical web browser.
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A minor nit, and some folks I know hate needless returns
as MRI does not optimize them away.
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Configuration files paths given on the command-line are no
longer expanded. This should make configuration reloads
possible when a non-absolute path is specified for --config-file
and Unicorn was deployed to a symlink directories (as with
Capistrano). Since deployments have always been strongly
encouraged to use absolute paths in the config file, this
change does not affect them.
This is our first gem release using gemcutter.
Eric Wong (3):
SIGNALS: HUP + preload_app cannot reload app code
Do not expand paths given on the shell
GNUmakefile: prep release process for gemcutter
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Shells already expand '~' before the executables see it, and
relative paths inside symlinks can get set incorrectly to the
actual directory name, and not the (usually desired) symlink
name for things like Capistrano.
Since our paths are now unexpanded, we must now check the
"working_directory" directive and raise an error if the user
specifies the config file in a way that makes the config file
unreloadable.
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Mostly internal cleanups and documentation updates. Irrelevant
stacktraces from client disconnects/errors while reading
"rack.input" are now cleared to avoid unnecessary noise. If
user switching in workers is used, ownership of logs is now
preserved when reopening worker logs (send USR1 only to the the
master in this case). The timeout config no longer affects long
after_fork hooks or application startups.
New features include the addition of the :umask option for the
"listen" config directive and error reporting for non-portable
socket options.
No ponies have ever been harmed in our development.
Eric Wong (28):
unicorn.1: document RACK_ENV changes in 0.94.0
HACKING: update with "gmake" in examples
don't nuke children for long after_fork and app loads
local.mk.sample: steal some updates from Rainbows!
Load Unicorn constants when building app
tee_input: fix RDoc argument definition for tee
Add FAQ
FAQ: fix links to Configurator docs
tee_input: better premature disconnect handling
tee_input: don't shadow struct members
raise Unicorn::ClientShutdown if client aborts in TeeInput
tee_input: fix comment from an intermediate commit
FAQ: additional notes on getting HTTPS redirects right
configurator: update RDoc and comments in examples
bump version to 0.95.0pre
configurator: listen :umask parameter for UNIX sockets
preserve user/group ownership when reopening logs
old_rails/static: avoid freezing strings
old_rails: autoload Static
const: no need to freeze HTTP_EXPECT
test_server: ensure stderr is written to before reading
tee_input: expand client error handling
replace "rescue => e" with "rescue Object => e"
socket_helper: do not hide errors when setting socket options
socket_helper: RDoc for constants
ClientShutdown: RDoc
Rakefile: add raa_update task
tee_input: client_error always raises
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We do not hide unforseen exceptions, as that could cause us to
waste precious time attempting to continue processing after
errors.
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Since they're all optional, make them non-fatal, but make sure
we log them so we can diagnose what (if anything) is going
wrong.
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"Object" is needless noise and some folks are annoyed by
seeing it.
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First move it to a separate method, this allows subclasses to
reuse our error handler. Additionally, capture HttpParserError
as well since backtraces are worthless when a client sends us
a bad request, too.
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We never set this as a hash key, so there's no performance
gain from having a frozen string.
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It makes life easier for people writing config.ru files for use
with Rails.
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No need to freeze them unless we're assigning new hash
values (PATH_INFO is already hashed when we assign it).
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This is only supported when SIGUSR1 is sent only to the master
process (which then resends SIGUSR1 to the workers).
Since we only added support for user/group switching in the
workers, we now chown any log files upon switching users so the
master can pick up and chown the log files later on. Thus
we can avoid having to restart workers because they fail to
rotate log files on their own.
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Typically UNIX domain sockets are created with more liberal
file permissions than the rest of the application. By default,
we create UNIX domain sockets to be readable and writable by
all local users to give them the same accessibility as
locally-bound TCP listeners.
This only has an effect on UNIX domain sockets.
This was inspired by Suraj Kurapati in
cfbcd2f00911121536rd0582b8u961f7f2a8c6e546a@mail.gmail.com
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We need a minor version since we will expose
Unicorn::ClientDisconnect.
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Some of this based on Suraj Kurapati's comments on
the mailing list.
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Leaving the EOFError exception as-is bad because most
applications/frameworks run an application-wide exception
handler to pretty-print and/or log the exception with a huge
backtrace.
Since there's absolutely nothing we can do in the server-side
app to deal with clients prematurely shutting down, having a
backtrace does not make sense. Having a backtrace can even be
harmful since it creates unnecessary noise for application
engineers monitoring or tracking down real bugs.
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It's confusing when a local variable reuses the same name
as a struct member.
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Just let the error bubble all the way up to where Unicorn calls
process_client where it'll be appropriately handled.
Additionally, we'l just check the return value of tee() in
ensure_length and avoid it if it nils on us.
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This will benefit users of a copy-on-write-friendly memory
manager provided with Ruby Enterprise Edition. Additionally,
this will the reduce maintenance impact on Rainbows! in the future
since load/require are not thread-safe under 1.9.
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Sometimes app loads and after_fork hooks can take a long time,
even longer than shorter timeouts. Since timeouts are only
meant for application processing when clients are involved,
we won't nuke workers that have never chmodded before.
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The HTTP parser is fix for oddly-aligned reads of trailers (this
technically affects headers, too, but is highly unlikely due to
our non-support of slow clients). This allows our HTTP parser
to better support very slow clients when used by other servers
(like Rainbows!). Fortunately this bug does not appear to lead
to any invalid memory accesses (and potential arbitrary code
execution).
FreeBSD (and possibly other *BSDs) support is improved and and
all the test cases pass under FreeBSD 7.2. Various flavors of
GNU/Linux remains our primary platform for development and
production.
New features added include the "working_directory" directive in
the configurator . Even without specifying a
"working_directory", symlink-aware detection of the current path
no longer depends on /bin/sh so it should work out-of-the-box on
FreeBSD and Solaris and not just systems where /bin/sh is dash,
ksh93 or bash.
User-switching support is finally supported but only intended
for use in the after_fork hook of worker processes. Putting it
in the after_fork hook allows allows users to set things like
CPU affinity[1] on a per-worker basis before dropping
privileges. The master process retains all privileges it
started with.
The ENV["RACK_ENV"] (process-wide) environment variable is now
both read and set for `unicorn' in the same way RAILS_ENV is
used by `unicorn_rails'. This allows the Merb launcher to read
ENV["RACK_ENV"] in config.ru. Other web servers already set
this and there may be applications or libraries that already
rely on this de facto standard.
Eric Wong (26):
cleanup: avoid redundant error checks for fstat
test_helper: connect(2) may fail with EINVAL
GNUmakefile: fix non-portable tar(1) usage
tests: provide a pure Ruby setsid(8) equivalent
more portable symlink awareness for START_CTX[:cwd]
test_signals: avoid portability issues with fchmod(2)
cleanup error handling and make it less noisy
Do not override Dir.chdir in config files
configurator: add "working_directory" directive
configurator: working_directory is expanded
configurator: set ENV["PWD"] with working_directory, too
configurator: working_directory affects pid, std{err,out}_paths
configurator: update documentation for working_directory
TODO: remove working_directory bit, done
Util.reopen_logs: remove needless Range
worker: user/group switching for after_fork hooks
Fix autoload of Etc in Worker for Ruby 1.9
bin/unicorn: allow RACK_ENV to be passed from parent
tests for RACK_ENV preservation
http: allow headers/trailers to be written byte-wise
http: extra test for bytewise chunked bodies
tee_input: do not clobber trailer buffer on partial uploads
test_exec: ensure master is killed after test
Util::tmpio returns a TmpIO that responds to #size
TODO: remove user-switching bit, done
unicorn 0.94.0
Wayne Larsen (1):
bin/unicorn: set ENV["RACK_ENV"] on startup
[1] - Unicorn does not support CPU affinity directly, but it is
possible to load code that allows it inside after_fork hooks,
or even just call sched_tool(8).
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Subclass off the core File class so we don't have to
worry about #size being defined. This will mainly
be useful to Rainbows! but allows us to simplify
our TeeInput implementation a little, too.
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Found in Rainbows! testing. Reusing the buffer when finalizing
input for headers could be problematic because it would lead
to the @buf2 instance variable being clobbered; allowing the
trailers to "leak" into the body.
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Constant scoping appears to be a bit different under 1.9
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This must be called in the after_fork hook because there may be
Ruby modules that'll allow things such as CPU affinity and
scheduling class/priority to be set on a per-worker basis. So
we give the user the ability to change users at any time during
the after_fork hook.
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?/ avoids allocating a String in 1.8 and in 1.9 short String
objects are cheap.
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We follow the principle of least surprise now, so less
documentation is better documentation.
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It makes more sense this way since users usually expect config
file directives to be order-independent.
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