* [ANN] yahns 1.12.5 -_- sleepy app server for Ruby
@ 2016-06-05 23:12 6% ` Eric Wong
0 siblings, 0 replies; 2+ results
From: Eric Wong @ 2016-06-05 23:12 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.
* git clone git://yhbt.net/yahns
* https://yahns.yhbt.net/README
* https://yahns.yhbt.net/NEWS.atom.xml
* we only accept plain-text email yahns-public@yhbt.net
* and archive all the mail we receive: https://yhbt.net/yahns-public/
* nntp://news.public-inbox.org/inbox.comp.lang.ruby.yahns
Changes:
yahns 1.12.5 - proxy_pass + rack.hijack fixes
Hopefully the last of the 1.12.x series, this release
fixes a few minor bugs mainly needed for testing.
No upgrade should be necessary for non-proxy_pass users.
4 changes since v1.12.4 from the "maint" branch at
git://yhbt.net/yahns.git
http_client: set state to :ignore before hijack callback
test/test_client_expire: fix for high RLIMIT_NOFILE
proxy_pass: do not chunk HTTP/1.0 with keep-alive
proxy_pass: X-Forwarded-For appends to existing list
lib/yahns/http_client.rb | 6 +++---
lib/yahns/proxy_http_response.rb | 8 ++++++--
lib/yahns/proxy_pass.rb | 5 ++++-
test/test_client_expire.rb | 13 +++++++++++--
test/test_proxy_pass.rb | 10 ++++++++++
5 files changed, 34 insertions(+), 8 deletions(-)
Note: the current "master" branch (at commit 5e211ea003d2)
includes refactorings and new features not included in this
release.
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.
^ permalink raw reply [relevance 6%]
* [PATCH] test/test_client_expire: fix for high RLIMIT_NOFILE
@ 2016-05-15 8:41 7% Eric Wong
0 siblings, 0 replies; 2+ results
From: Eric Wong @ 2016-05-15 8:41 UTC (permalink / raw)
To: yahns-public
The ab(1) command we use for testing is limited to 20000 open
connections under Debian jessie; a perfectly reasonable limit
to avoid port exhaustion. I never noticed this limit before,
but systemd under Jessie seems to have upped the default
RLIMIT_NOFILE to 65536(!), causing ab to error out.
We don't even need 10K connections for testing,
we just need to hit *some* limit before we start expiring.
So lower the RLIMIT_NOFILE back to 1024 in the forked server
process so we can test more quickly without running out of
ports or memory, since exhausting the 65536 RLIMIT_NOFILE
limit is not going to happen with a single TCP address.
---
test/test_client_expire.rb | 13 +++++++++++--
1 file changed, 11 insertions(+), 2 deletions(-)
diff --git a/test/test_client_expire.rb b/test/test_client_expire.rb
index b2f932b..b6dec1a 100644
--- a/test/test_client_expire.rb
+++ b/test/test_client_expire.rb
@@ -99,6 +99,14 @@ def test_client_expire_desperate
end
stderr_path err.path
end
+
+ # 1024 is common on old systems, but nowadays Jessie seems to be 65536
+ nr = Process.getrlimit(:NOFILE)[0]
+ if nr >= 1024
+ nr = 1024
+ do_rlimit = true
+ end
+
pid = mkserver(cfg) do
keep = { $stderr => true, $stdout => true, $stdin => true, @srv => true }
ObjectSpace.each_object(IO) do |obj|
@@ -108,7 +116,9 @@ def test_client_expire_desperate
rescue IOError # could be uninitialized
end
end
+ Process.setrlimit(:NOFILE, nr) if do_rlimit
end
+
f = get_tcp_client(host, port)
f.write "G"
s = get_tcp_client(host, port)
@@ -119,10 +129,9 @@ def test_client_expire_desperate
assert_match(%r{keep-alive}, str)
sleep 1
- # ignore errors, just beat the crap out of the process
- nr = Process.getrlimit(:NOFILE)[0] # 1024 is common
assert_operator nr, :>, 666, "increase RLIM_NOFILE (ulimit -n)"
nr -= 50
+ # ignore errors, just beat the crap out of the process
opts = { out: "/dev/null", err: "/dev/null", close_others: true }
begin
pids = 2.times.map do
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2016-04-08 20:01 [ANN] yahns 1.12.3 -_- sleepy app server for Ruby Eric Wong
2016-05-02 19:47 ` [ANN] yahns 1.12.4 " Eric Wong
2016-06-05 23:12 6% ` [ANN] yahns 1.12.5 " Eric Wong
2016-05-15 8:41 7% [PATCH] test/test_client_expire: fix for high RLIMIT_NOFILE Eric Wong
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