When 'minconn' is set, the number of simultaneous sessions sent to the server
will be limited by a dynamic value depending on the global load on the
instance itself. The principle is to fix the maximal concurrency on the server
proportionnally to the instance's usage relative to its maxconn, with a minimum
fixed to <minconn>. The formula for the number of simultaneous sessions sent
to the server is then max(srv_minconn, srv_maxconn*px_conn/px_maxconn). This
helps unloading the servers when the load is very low.
to 'close', but does not actually close any connection. The problem
is, there are some servers which don't close the connection even if
the proxy tells them 'Connection: close'. A workaround was added by
the way of a new option 'forceclose' (which implies 'httpclose'),
and which makes the proxy close the outgoing channel to the server
once it has sent all its headers. Just don't use this with the
'CONNECT' method of course !
were erroneously load-balanced while the doc said the opposite.
Since load-balanced backup servers is one of the features some
people have been asking for, the problem was fixed to reflect the
documented behaviour and a new option 'allbackups' was introduced
to provide the feature to those who need it.
* second batch of socklen_t changes.
* clean-ups from Cameron Simpson.
* because tv_remain() does not know about eternity, using no timeout can
make select() spin around a null time-out. Bug reported by Cameron Simpson.
* client read timeout was not properly set to eternity initialized after an
accept() if it was not set in the config. It remained undetected so long
because eternity is 0 and newly allocated pages are zeroed by the system.
* do not call get_original_dst() when not in transparent mode.
* implemented a workaround for a bug in certain epoll() implementations on
linux-2.4 kernels (epoll-lt <= 0.21).
* implemented TCP keepalive with new options : tcpka, clitcpka, srvtcpka.
* changed the runtime argument to disable epoll() to '-de'
* changed the runtime argument to disable poll() to '-dp'
* added global options 'nopoll' and 'noepoll' to do the same at the
configuration level.
* added a 'linux24e' target to the Makefile for Linux 2.4 systems patched to
support epoll().
* changed default FD_SETSIZE to 65536 on Solaris (default=1024)
* conditionned signals redirection to #ifdef DEBUG_MEMORY
* implemented the HTTP 303 code for error redirection. This forces the
browser to fetch the given URI with a GET request. The new keyword for
this is 'errorloc303', and a new 'errorloc302' keyword has been created
to make them easily distinguishable.
* added more controls in the parser for valid use of '\x' sequence.
* few fixes from Alex & Klaus
* fixed a few errors in the documentation
* do not pre-initialize unused file-descriptors before select() anymore.
* add an architecture guide to the documentation
* released without any changes
* increased default BUFSIZE to 16 kB to accept max headers of 8 kB which is
compatible with Apache. This limit can be configured in the makefile now.
Thanks to Eric Fehr for the checks.
* added a per-server "source" option which now makes it possible to bind to
a different source for each (potentially identical) server.
* changed cookie-based server selection slightly to allow several servers to
share a same cookie, thus making it possible to associate backup servers to
live servers and ease soft-stop for maintenance periods. (Alexander Lazic)
* added the cookie 'prefix' mode which makes it possible to use persistence
with thin clients which support only one cookie. The server name is prefixed
before the application cookie, and restore back.
* fixed the order of servers within an instance to match documentation. Now
the servers are *really* used in the order of their declaration. This is
particularly important when multiple backup servers are in use.
* fixed a bug where a TCP connection would be logged twice if the 'logasap'
option was enabled without the 'tcplog' option.
* encode_string() would use hdr_encode_map instead of the map argument.
* the logged request is now encoded with '#XX' for unprintable characters
* new keywords 'capture request header' and 'capture response header' enable
logging of arbitrary HTTP headers in requests and responses
* removed "-DSOLARIS" after replacing the last inet_aton() with inet_pton()
* added the '-V' command line option to verbosely report errors even though
the -q or 'quiet' options are specified. This is useful with '-c'.
* added a Red Hat init script and a .spec from Simon Matter <simon.matter@invoca.ch>
* added 'rspdeny' and 'rspideny' to block certain responses to avoid sensible
information leak from servers.
* more examples added into the configuration
* the configurable HTTP health check introduced in 1.1.23 revealed a shameful
bug : the code still assumed that HTTP requests were the same size as the
original ones (22 bytes), and failed if they were not.
* added support for pidfiles.
* added the 'tcplog' option, which provides enhanced, HTTP-like logs for
generic TCP proxies, or lighter logs for HTTP proxies.
* fixed a time-out condition wrongly reported as client time-out in data
phase if the client timeout was lower than the connect timeout times the
number of retries.
* doc: added some precisions about the log timers
* if a client sent a full request then shut its write connection down, then
the request was aborted. This case was detected only when using haproxy
both as health-check client and as a server.
* if 'option httpchk' is used in a 'health' mode server, then responses will
change from 'OK' to 'HTTP/1.0 200 OK'.
* fixed a Linux-only bug in case of HTTP server health-checks, where a single
server response followed by a close could be ignored, and the server seen
as failed.
* renamed 'haproxy.txt' to 'haproxy-fr.txt'
* large documentation and examples cleanups
* fixed a stupid bug introduced in 1.1.22 which caused second and subsequent
'default' sections to keep previous parameters, and not initialize logs
correctly.
* fixed a second stupid bug introduced in 1.1.22 which caused configurations
relying on 'dispatch' mode to segfault at the first connection.
* 'option httpchk' now supports method, HTTP version and a few headers.
* now, 'option httpchk', 'cookie' and 'capture' can be specified in
'defaults' section
* a fresh new english documentation
* large Makefile cleanup for increased portability
* new build script 'build.cfg' for Formilux-0.1.8
* new startup script 'init.haproxy.flx0' for Formilux-0.1.8
* 'listen' now supports optionnal address:port-range lists
* 'bind' introduced to add new listen addresses
* fixed a bug which caused a session to be kept established on a server till
it timed out if the client closed during the DATA phase.
* the port part of each server address can now be empty to make the proxy
connect to the server on the same port it was connected to, be an absolute
unsigned number to reflect a single port (as in older versions), or an
explicitly signed number (+N/-N) to indicate that this offset must be
applied to the port the proxy was connected to, when connecting to the
server.
* the 'port' server option allows the user to specify a different
health-check port than the service one. It is mandatory when only relative
ports have been specified and check is required. By default, the checks are
sent to the service port.
* new 'defaults' section which is rather similar to 'listen' except that all
values are only used as default values for future 'listen' sections, until
a new 'defaults' resets them. At the moment, server options, regexes,
cookie names and captures cannot be set in the 'defaults' section.
* Makefile now optimizes for Ultrasparc by default on Solaris/Sparc
* large documentation updates and fixes
* new 'tests' directory with some debug files
* changed the debug output format so that it now includes the session unique
ID followed by the instance name at the beginning of each line.
* in debug mode, accept now shows the client's IP and port.
* added one 3 small debugging scripts to search and pretty print debug output
* changed the default health check request to "OPTIONS /" instead of
"OPTIONS *" since not all servers implement the later one.
* "option httpchk" now accepts an optional parameter allowing the user to
specify and URI other than '/' during health-checks.
* made Makefile more robust to pcre-config errors
* added 3 new pretty-print scripts : debug2ansi, debug2html and debugfind
* upgraded Formilux package to haproxy-1.1.21-flx.1.pkg
* removed the now obsolete haproxy2html.sh
* Haproxy can be compiled with PCRE regex instead of libc regex, by setting
REGEX=pcre on the make command line.
* HTTP health-checks now use "OPTIONS *" instead of "OPTIONS /".
* when explicit source address binding is required, it is now also used for
health-checks.
* added 'reqpass' and 'reqipass' to allow certain headers but not the request
itself.
* factored several strings to reduce binary size by about 2 kB.
* replaced setreuid() and setregid() with more standard setuid() and setgid().
* added 4 status flags to the log line indicating who ended the connection
first, the sessions state, the validity of the cookie, and action taken on
the set-cookie header.
* rearranged the changelog and removed it from haproxy.c
* large documentation updates
* add the notion of "backup" servers, which are used only when all other
servers are down.
* make Set-Cookie return "" instead of "(null)" when the server has no
cookie assigned (useful for backup servers).
* "log" now supports an optionnal level name (info, notice, err ...) above
which nothing is sent.
* replaced some strncmp() with memcmp() for better efficiency.
* added "capture cookie" option which logs client and/or server cookies
* cleaned up/down messages and dump servers states upon SIGHUP
* added a redirection feature for errors : "errorloc <errnum> <url>"
* now we won't insist on connecting to a dead server, even with a cookie,
unless option "persist" is specified.
* added HTTP/408 response for client request time-out and HTTP/50[234] for
server reply time-out or errors.
* updates to the examples files
* added a 'do_status' command to the Formilux init script
* fixed multi-cookie handling in client request to allow clean deletion
in insert+indirect mode. Now, only the server cookie is deleted and not
all the header. Should now be compliant to RFC2109.
* added a "nocache" option to "cookie" to specify that we explicitly want
to add a "cache-control" header when we add a cookie.
It is also possible to add an "Expires: <old-date>" to keep compatibility
with old/broken caches.
* some doc and examples cleanups
* if a cookie is used in insert+indirect mode, it's desirable that the
the servers don't see it. It was not possible to remove it correctly
with regexps, so now it's removed automatically.
* don't use snprintf()'s return value as an end of message since it may
be larger. This caused bus errors and segfaults in internal libc's
getenv() during localtime() in send_log().
* removed dead insecure send_syslog() function and all references to it.
* fixed warnings on Solaris due to buggy implementation of isXXXX().
* option "dontlognull"
* fixed "double space" bug in config parser
* fixed an uninitialized server field in case of dispatch
with no existing server which could cause a segfault during
logging.
* the pid logged was always the father's, which was wrong for daemons.
* fixed wrong level "LOG_INFO" for message "proxy started".
* http logging is now complete :
- ip:port, date, proxy, server
- req_time, conn_time, hdr_time, tot_time
- status, size, request
* source address binding
* connection logging displayed incorrect source address.
* added proxy start/stop and server up/down log events.
* replaced log message short buffers with larger trash.
* enlarged buffer to 8 kB and replace buffer to 4 kB.
* added a config.rc example for Formilux
* added a build script for Formilux
* added OpenBSD, Linux-2.2 and Linux-2.4 targets to the Makefile
* added a Formilux init script
* fixed a few timeout bugs
* rearranged the task scheduler subsystem to improve performance,
add new tasks, and make it easier to later port to librt ;
* allow multiple accept() for one select() wake up ;
* implemented internal load balancing with basic health-check ;
* cookie insertion and header add/replace/delete, with better strings
support.
* reworked buffer handling to fix a few rewrite bugs, and
improve overall performance.
* implement the "purge" option to delete server cookies in direct mode.
* fixed some error cases where the maxfd was not decreased.
* now supports transparent proxying, at least on linux 2.4.
* soft stop works again (fixed select timeout computation).
* it seems that TCP proxies sometimes cannot timeout.
* added a "quiet" mode.
* enforce file descriptor limitation on socket() and accept().
