666 lines
32 KiB
Plaintext
666 lines
32 KiB
Plaintext
Installation instructions for HAProxy
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=====================================
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This is a development version, so it is expected to break from time to time,
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to add and remove features without prior notification and it should not be used
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in production, unless you're an experienced user and are willing to follow
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weekly updates. If you are not used to build from sources or if you are not
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used to follow updates then it is recommended that instead you use the packages
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provided by your software vendor or Linux distribution. Most of them are taking
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this task seriously and are doing a good job at backporting important fixes.
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If for any reason you'd prefer to use a different version than the one packaged
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for your system, you want to be certain to have all the fixes or to get some
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commercial support, other choices are available at http://www.haproxy.com/.
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Areas covered in this document
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==============================
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1) Quick build & install
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2) Basic principles
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3) Build environment
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4) Dependencies
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5) Advanced build options
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6) How to install HAProxy
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1) Quick build & install
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========================
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If you've already built HAProxy and are just looking for a quick reminder, here
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are a few build examples :
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- recent Linux system with all options, make and install :
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$ make clean
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$ make -j $(nproc) TARGET=linux-glibc \
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USE_OPENSSL=1 USE_LUA=1 USE_PCRE=1 USE_SYSTEMD=1
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$ sudo make install
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- FreeBSD and OpenBSD, build with all options :
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$ gmake -j 4 TARGET=freebsd USE_OPENSSL=1 USE_LUA=1 USE_PCRE=1
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- embedded Linux, build using a cross-compiler :
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$ make -j $(nproc) TARGET=linux-glibc USE_OPENSSL=1 USE_PCRE=1 \
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CC=/opt/cross/gcc730-arm/bin/gcc ADDLIB=-latomic
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- Build with static PCRE on Solaris / UltraSPARC :
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$ make TARGET=solaris CPU=ultrasparc USE_STATIC_PCRE=1
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For more advanced build options or if a command above reports an error, please
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read the following sections.
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2) Basic principles
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===================
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HAProxy uses a single GNU Makefile which supports options on the command line,
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so that there is no need to hack a "configure" file to work on your system. The
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makefile totally supports parallel build using "make -j <jobs>" where <jobs>
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matches the number of usable processors, which on some platforms is returned by
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the "nproc" utility. The explanations below may occasionally refer to some
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options, usually in the form "name=value", which have to be passed to the
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command line. This means that the option has to be passed after the "make"
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command. For example :
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$ make -j $(nproc) TARGET=generic USE_GZIP=1
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One required option is TARGET, it must be set to a target platform name, which
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provides a number of presets. The list of known platforms is displayed when no
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target is specified. It is not strictly required to use the exact target, you
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can use a relatively similar one and adjust specific variables by hand.
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Most configuration variables are in fact booleans. Some options are detected and
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enabled by default if available on the target platform. This is the case for all
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those named "USE_<feature>". These booleans are enabled by "USE_<feature>=1"
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and are disabled by "USE_<feature>=" (with no value). An exhaustive list of the
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supported USE_* features is located at the top of the main Makefile. The last
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occurrence of such an option on the command line overrides any previous one.
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Example :
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$ make TARGET=generic USE_THREAD=
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In case of error or missing TARGET, a help screen is displayed. It is also
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possible to display a list of all known options using "make help".
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Some optional components which may depend on third-party libraries, are used
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with popular tools which are not necessarily standard implementations, or are
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maintained at slower pace than the core of the project, are located in the
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"addons/" directory. These ones may disappear in a future version if the
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product they depend on disappears or if their maintainers do not assign enough
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resources to maintain them any more. For this reason they are not built by
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default, but some USE_* options are usually provided for them, and their build
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is routinely tested anyway.
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3) Build environment
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====================
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HAProxy requires a working GCC or Clang toolchain and GNU make :
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- GNU make >= 3.80. Note that neither Solaris nor OpenBSD's make work with
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the GNU Makefile. If you get many syntax errors when running "make", you
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may want to retry with "gmake" which is the name commonly used for GNU make
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on BSD systems.
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- GCC >= 4.2 (up to 12 tested). Older versions can be made to work with a
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few minor adaptations if really needed. Newer versions may sometimes break
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due to compiler regressions or behaviour changes. The version shipped with
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your operating system is very likely to work with no trouble. Clang >= 3.0
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is also known to work as an alternative solution. Recent versions may emit
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a bit more warnings that are worth reporting as they may reveal real bugs.
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TCC (https://repo.or.cz/tinycc.git) is also usable for developers but will
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not support threading and was found at least once to produce bad code in
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some rare corner cases (since fixed). But it builds extremely quickly
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(typically half a second for the whole project) and is very convenient to
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run quick tests during API changes or code refactoring.
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- GNU ld (binutils package), with no particular version. Other linkers might
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work but were not tested.
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On debian or Ubuntu systems and their derivatives, you may get all these tools
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at once by issuing the two following commands :
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$ sudo apt-get update
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$ sudo apt-get install build-essential
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On Fedora, CentOS, RHEL and derivatives, you may get the equivalent packages
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with the following command :
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$ sudo yum groupinstall "Development Tools"
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Please refer to your operating system's documentation for other systems.
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It is also possible to build HAProxy for another system or platform using a
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cross-compiler but in this case you probably already have installed these
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tools.
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Building HAProxy may require between 60 and 80 MB of free space in the
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directory where the sources have been extracted, depending on the debugging
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options involved.
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4) Dependencies
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===============
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HAProxy in its basic form does not depend on anything beyond a working libc.
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However a number of options are enabled by default, or are highly recommended,
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and these options will typically involve some external components or libraries,
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depending on the targeted platform.
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Optional dependencies may be split into several categories :
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- memory allocation
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- regular expressions
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- multi-threading
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- password encryption
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- cryptography
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- compression
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- lua
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- device detection
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- miscellaneous
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4.1) Memory allocation
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----------------------
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By default, HAProxy uses the standard malloc() call provided by the libc. It
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may also be built to use jemalloc, which is fast and thread-safe. In order to
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use it, please add "-ljemalloc" to the ADDLIB variable. You may possibly also
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need to append "-lpthread" and/or "-ldl" depending on the operating system.
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4.2) Regular expressions
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------------------------
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HAProxy may make use regular expressions (regex) to match certain patterns. The
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regex engine is provided by default in the libc. On some operating systems, it
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might happen that the original regex library provided by the libc is too slow,
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too limited or even bogus. For example, on older Solaris versions up to 8, the
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default regex used not to properly extract group references, without reporting
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compilation errors. Also, some early versions of the GNU libc used to include a
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regex engine which could be slow or even crash on certain patterns.
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If you plan on importing a particularly heavy configuration involving a lot of
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regex, you may benefit from using some alternative regex implementations such as
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PCRE. HAProxy natively supports PCRE and PCRE2, both in standard and JIT
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flavors (Just In Time). The following options are available depending on the
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library version provided on your system :
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- "USE_PCRE=1" : enable PCRE version 1, dynamic linking
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- "USE_STATIC_PCRE=1" : enable PCRE version 1, static linking
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- "USE_PCRE_JIT=1" : enable PCRE version 1 in JIT mode
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- "USE_PCRE2=1" : enable PCRE version 2, dynamic linking
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- "USE_STATIC_PCRE2=1" : enable PCRE version 2, static linking
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- "USE_PCRE2_JIT=1" : enable PCRE version 2 in JIT mode
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Both of these libraries may be downloaded from https://www.pcre.org/.
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By default, the include and library paths are figured from the "pcre-config"
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and "pcre2-config" utilities. If these ones are not installed or inaccurate
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(for example when cross-compiling), it is possible to force the path to include
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files using "PCRE_INC" and "PCRE2_INC" respectively, and the path to library
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files using "PCRE_LIB" and "PCRE2_LIB" respectively. For example :
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$ make TARGET=generic \
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USE_PCRE2_JIT=1 PCRE2_INC=/opt/cross/include PCRE2_LIB=/opt/cross/lib
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4.3) Multi-threading
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--------------------
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On some systems for which positive feedback was reported, multi-threading will
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be enabled by default. When multi-threading is used, the libpthread library
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(POSIX threading) will be used. If the target system doesn't contain such a
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library, it is possible to forcefully disable multi-threading by adding
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"USE_THREAD=" on the command line.
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4.4) Password encryption
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------------------------
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Many systems provide password encryption functions used for authentication. On
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some systems these functions are part of the libc. On others, they're part of a
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separate library called "libcrypt". The default targets are pre-configured
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based on which system needs the library. It is possible to forcefully disable
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the linkage against libcrypt by adding "USE_LIBCRYPT=" on the command line, or
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to forcefully enable it using "USE_LIBCRYPT=1".
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4.5) Cryptography
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-----------------
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For SSL/TLS, it is necessary to use a cryptography library. HAProxy currently
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supports the OpenSSL library, and is known to build and work with branches
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1.0.0, 1.0.1, 1.0.2, 1.1.0, 1.1.1, and 3.0.x. OpenSSL follows a long-term
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support cycle similar to HAProxy's, and each of the branches above receives its
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own fixes, without forcing you to upgrade to another branch. There is no excuse
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for staying vulnerable by not applying a fix available for your version. There
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is always a small risk of regression when jumping from one branch to another
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one, especially when it's very new, so it's preferable to observe for a while
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if you use a different version than your system's defaults.
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Three OpenSSL derivatives called LibreSSL, BoringSSL and QUICTLS are reported
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to work as well. While there are some efforts from the community to ensure they
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work well, OpenSSL remains the primary target and this means that in case of
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conflicting choices, OpenSSL support will be favored over other options. Note
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that OpenSSL is not compatible when building haproxy with QUIC support. In this
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case, QUICTLS is the preferred alternative. See the section about QUIC in this
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document.
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In order to enable SSL/TLS support, simply pass "USE_OPENSSL=1" on the command
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line and the default library present on your system will be used :
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$ make TARGET=generic USE_OPENSSL=1
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If you want to use a different version from the one provided by your system
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(which is not recommended due to the risk of missing security fixes), it is
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possible to indicate the path to the SSL include files using SSL_INC, and the
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SSL library files using SSL_LIB. Example :
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$ make TARGET=generic \
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USE_OPENSSL=1 SSL_INC=/opt/ssl-1.1.1/include SSL_LIB=/opt/ssl-1.1.1/lib
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In order to link OpenSSL statically against HAProxy, first download OpenSSL
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from https://www.openssl.org/ then build it with the "no-shared" keyword and
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install it to a local directory, so your system is not affected :
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$ export STATICLIBSSL=/tmp/staticlibssl
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$ ./config --prefix=$STATICLIBSSL no-shared
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$ make && make install_sw
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Then when building haproxy, pass that path via SSL_INC and SSL_LIB :
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$ make TARGET=generic \
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USE_OPENSSL=1 SSL_INC=$STATICLIBSSL/include SSL_LIB=$STATICLIBSSL/lib
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When building with OpenSSL on some systems, you may also need to enable support
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for the "libz" library, which is visible if the linker complains about function
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"deflateInit()" not being found. In this case, simply append "ADDLIB=-lz" to
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the command line.
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It is worth mentioning that asynchronous cryptography engines are supported on
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OpenSSL 1.1.0 and above. Such engines are used to access hardware cryptography
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acceleration that might be present on your system. Due to API changes that
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appeared with OpenSSL 3.0 and cause lots of build warnings, engines are not
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enabled by default anymore in HAProxy 2.6. It is required to pass USE_ENGINE=1
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if they are desired.
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4.6) Compression
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----------------
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HAProxy can compress HTTP responses before delivering them to clients, in order
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to save network bandwidth. Two compression options are available. The first one
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relies on the libslz library (http://libslz.org) that is embedded in haproxy.
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It is enabled by default as it is very fast and does not keep a copy of the
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contents in memory. It is possible to disable it, for example for very small
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systems, by passing "USE_SLZ=" to the "make" command.
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Please note that SLZ will benefit from some CPU-specific instructions like the
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availability of the CRC32 extension on some ARM processors. Thus it can further
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improve its performance to build with "CPU=native" on the target system, or
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"CPU=armv81" (modern systems such as Graviton2 or A55/A75 and beyond),
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"CPU=a72" (e.g. for RPi4, or AWS Graviton), "CPU=a53" (e.g. for RPi3), or
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"CPU=armv8-auto" (automatic detection with minor runtime penalty).
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A second option involves the widely known zlib library, which is very likely
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installed on your system. In order to use zlib, simply pass "USE_ZLIB=1" to the
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"make" command line, which will also automatically disable SLZ. If the library
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is not installed in your default system's path, it is possible to specify the
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path to the include files using ZLIB_INC, and the path to the library files
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using ZLIB_LIB :
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$ make TARGET=generic \
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USE_ZLIB=1 ZLIB_INC=/opt/zlib-1.2.11/include ZLIB_LIB=/opt/zlib-1.2.11/lib
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Zlib is commonly found on most systems, otherwise updates can be retrieved from
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http://www.zlib.net/. It is easy and fast to build, and new versions sometimes
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provide better performance so it might be worth using an up-to-date one.
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Zlib compresses a bit better than libslz but at the expense of more CPU usage
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(about 3.5 times more minimum), and a huge memory usage (~260 kB per compressed
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stream). The only valid reason for uzing Zlib instead of SLZ here usually is to
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deal with a very limited internet bandwidth while CPU and RAM are abundant so
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that the last few percent of compression ratio are worth the invested hardware.
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4.7) Lua
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--------
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Lua is an embedded programming language supported by HAProxy to provide more
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advanced scripting capabilities. Only versions 5.3 and above are supported.
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In order to enable Lua support, please specify "USE_LUA=1" on the command line.
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Some systems provide this library under various names to avoid conflicts with
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previous versions. By default, HAProxy looks for "lua5.4", "lua54", "lua5.3",
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"lua53", "lua". If your system uses a different naming, you may need to set the
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library name in the "LUA_LIB_NAME" variable.
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If Lua is not provided on your system, it can be very simply built locally. It
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can be downloaded from https://www.lua.org/, extracted and built, for example :
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$ cd /opt/lua-5.3.5
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$ make linux
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The path to the include files and library files may be set using "LUA_INC" and
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"LUA_LIB" respectively. For example :
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$ make TARGET=generic \
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USE_LUA=1 LUA_INC=/opt/lua-5.3.5/src LUA_LIB=/opt/lua-5.3.5/src
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4.8) Device detection
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---------------------
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HAProxy supports several device detection modules relying on third party
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products. Some of them may provide free code, others free libs, others free
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evaluation licenses. Please read about their respective details in the
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following files :
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doc/DeviceAtlas-device-detection.txt for DeviceAtlas
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doc/51Degrees-device-detection.txt for 51Degrees
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doc/WURFL-device-detection.txt for Scientiamobile WURFL
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4.9) Miscellaneous
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------------------
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Some systems have specificities. Usually these specificities are known and/or
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detected and properly set for you. If you need to adjust the behaviour, here
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are the extra libraries that may be referenced at build time :
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- USE_RT=1 build with librt, which is sometimes needed on some systems
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when using threads. It is set by default on Linux platforms,
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and may be disabled using "USE_RT=" if your system doesn't
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have one. You may have to set it as well if you face an error
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indicating that clock_gettime() was not found.
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- USE_DL=1 build with libdl, which is usually needed for Lua and OpenSSL
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on Linux. It is automatically detected and may be disabled
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using "USE_DL=", though it should never harm.
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- USE_SYSTEMD=1 enables support for the sdnotify features of systemd,
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allowing better integration with systemd on Linux systems
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which come with it. It is never enabled by default so there
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is no need to disable it.
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4.10) Common errors
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-------------------
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Some build errors may happen depending on the options combinations or the
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selected target. When facing build errors, if you know that your system is a
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bit special or particularly old, start from TARGET=generic, it is easier to
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start from there and fix the remaining issues than trying to degrade another
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target. Common issues may include:
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- clock_gettime() not found
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=> your system needs USE_RT=1
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- many __sync_<something> errors in many files
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=> your gcc is too old, build without threads.
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- many openssl errors
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=> your OpenSSL version really is too old, do not enable OpenSSL
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4.11) QUIC
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----------
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QUIC is the new transport layer protocol and is required for HTTP/3. This
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protocol stack is currently supported as an experimental feature in haproxy on
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the frontend side. In order to enable it, use "USE_QUIC=1 USE_OPENSSL=1".
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Note that the OpenSSL library is not compatible with QUIC. The preferred option
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is to use QUICTLS. This is a fork of OpenSSL with a QUIC-compatible API. Its
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repository is available at https://github.com/quictls/openssl. You can use the
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following instruction to build a functional QUICTLS.
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$ ./config --libdir=lib [--prefix=/opt/quictls]
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$ make
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$ make install
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On a development environment, use SSL_INC and SSL_LIB when building haproxy to
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point to the correct cryptographic library. It may be useful to specify QUICTLS
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location via rpath for haproxy execution. Example :
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$ make TARGET=generic \
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USE_QUIC=1 \
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USE_OPENSSL=1 SSL_INC=/opt/quictls/include SSL_LIB=/opt/quictls/lib \
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LDFLAGS="-Wl,-rpath,/opt/quictls/lib"
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5) How to build HAProxy
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=======================
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This section assumes that you have already read section 2 (basic principles)
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and section 3 (build environment). It often refers to section 4 (dependencies).
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To build haproxy, you have to choose your target OS amongst the following ones
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and assign it to the TARGET variable :
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- linux-glibc for Linux kernel 2.6.28 and above
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- linux-glibc-legacy for Linux kernel 2.6.28 and above without new features
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- linux-musl for Linux kernel 2.6.28 and above with musl libc
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- solaris for Solaris 10 and above
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- freebsd for FreeBSD 10 and above
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- dragonfly for DragonFlyBSD 4.3 and above
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- netbsd for NetBSD 8 and above
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- osx for Mac OS/X
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- openbsd for OpenBSD 6.3 and above
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- aix51 for AIX 5.1
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- aix52 for AIX 5.2
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- aix72-gcc for AIX 7.2 (using gcc)
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- cygwin for Cygwin
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- haiku for Haiku
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- generic for any other OS or version.
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- custom to manually adjust every setting
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You may also choose your CPU to benefit from some optimizations. This is
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particularly important on UltraSparc machines. For this, you can assign
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one of the following choices to the CPU variable :
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- i686 for intel PentiumPro, Pentium 2 and above, AMD Athlon (32 bits)
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- i586 for intel Pentium, AMD K6, VIA C3.
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- ultrasparc : Sun UltraSparc I/II/III/IV processor
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- power8 : IBM POWER8 processor
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- power9 : IBM POWER9 processor
|
|
- armv81 : modern ARM cores (Cortex A55/A75/A76/A78/X1, Neoverse, Graviton2)
|
|
- a72 : ARM Cortex-A72 or A73 (e.g. RPi4, Odroid N2, AWS Graviton)
|
|
- a53 : ARM Cortex-A53 or any of its successors in 64-bit mode (e.g. RPi3)
|
|
- armv8-auto : support both older and newer armv8 cores with a minor penalty,
|
|
thanks to gcc 10's outline atomics (default with gcc 10.2).
|
|
- native : use the build machine's specific processor optimizations. Use with
|
|
extreme care, and never in virtualized environments (known to break).
|
|
- generic : any other processor or no CPU-specific optimization. (default)
|
|
|
|
Alternatively, you may just set the CPU_CFLAGS value to the optimal GCC options
|
|
for your platform. A second variable named SMALL_OPTS also supports passing a
|
|
number of defines and compiler options usually for small systems. For better
|
|
clarity it's recommended to pass the options which result in a smaller binary
|
|
(like memory limits or -Os) into this variable.
|
|
|
|
If you are building for a different system than the one you're building on,
|
|
this is called "cross-compiling". HAProxy supports cross-compilation pretty
|
|
well and tries to ease it by letting you adjust paths to all libraries (please
|
|
read section 4 on dependencies for more details). When cross-compiling, you
|
|
just need to pass the path to your compiler in the "CC" variable, and the path
|
|
to the linker in the "LD" variable. Most of the time, setting the CC variable
|
|
is enough since LD points to it by default.
|
|
|
|
By default the build process runs in quiet mode and hide the details of the
|
|
commands that are executed. This allows to more easily catch build warnings
|
|
and see what is happening. However it is not convenient at all to observe what
|
|
flags are passed to the compiler nor what compiler is involved. Simply append
|
|
"V=1" to the "make" command line to switch to verbose mode and display the
|
|
details again. It is recommended to use this option when cross-compiling to
|
|
verify that the paths are correct and that /usr/include is never involved.
|
|
|
|
You may want to build specific target binaries which do not match your native
|
|
compiler's target. This is particularly true on 64-bit systems when you want
|
|
to build a 32-bit binary. Use the ARCH variable for this purpose. Right now
|
|
it only knows about a few x86 variants (i386,i486,i586,i686,x86_64), two
|
|
generic ones (32,64) and sets -m32/-m64 as well as -march=<arch> accordingly.
|
|
This variable is only used to set ARCH_FLAGS to preset values, so if you know
|
|
the arch-specific flags that your system needs, you may prefer to set
|
|
ARCH_FLAGS instead. Note that these flags are passed both to the compiler and
|
|
to the linker. For example, in order to build a 32-bit binary on an x86_64
|
|
Linux system with SSL support without support for compression but when OpenSSL
|
|
requires ZLIB anyway :
|
|
|
|
$ make TARGET=linux-glibc ARCH=i386 USE_OPENSSL=1 ADDLIB=-lz
|
|
|
|
Recent systems can resolve IPv6 host names using getaddrinfo(). This primitive
|
|
is not present in all libcs and does not work in all of them either. Support in
|
|
glibc was broken before 2.3. Some embedded libs may not properly work either,
|
|
thus, support is disabled by default, meaning that some host names which only
|
|
resolve as IPv6 addresses will not resolve and configs might emit an error
|
|
during parsing. If you know that your OS libc has reliable support for
|
|
getaddrinfo(), you can add USE_GETADDRINFO=1 on the make command line to enable
|
|
it. This is the recommended option for most Linux distro packagers since it's
|
|
working fine on all recent mainstream distros. It is automatically enabled on
|
|
Solaris 8 and above, as it's known to work.
|
|
|
|
If your system supports PCRE (Perl Compatible Regular Expressions), then you
|
|
really should build with libpcre which is between 2 and 10 times faster than
|
|
other libc implementations. Regex are used for header processing (deletion,
|
|
rewriting, allow, deny). Please see section 4 about dependencies to figure
|
|
how to build with PCRE support.
|
|
|
|
It is possible to add native support for SSL, by passing "USE_OPENSSL=1" on the
|
|
make command line. The libssl and libcrypto will automatically be linked with
|
|
HAProxy. Some systems also require libz, so if the build fails due to missing
|
|
symbols such as deflateInit(), then try again with "ADDLIB=-lz". Please check
|
|
section 4 about dependencies for more information on how to build with OpenSSL.
|
|
|
|
HAProxy can compress HTTP responses to save bandwidth. Please see section 4
|
|
about dependencies to see the available libraries and associated options.
|
|
|
|
By default, the DEBUG_CFLAGS variable is set to '-g' to enable debug symbols.
|
|
It is not wise to disable it on uncommon systems, because it's often the only
|
|
way to get a usable core when you need one. Otherwise, you can set DEBUG to
|
|
'-s' to strip the binary.
|
|
|
|
If the ERR variable is set to any non-empty value, then -Werror will be added
|
|
to the compiler so that any build warning will trigger an error. This is the
|
|
recommended way to build when developing, and it is expected that contributed
|
|
patches were tested with ERR=1.
|
|
|
|
The DEBUG variable is used to extend the CFLAGS and is preset to a list of
|
|
build-time options that are known for providing significant reliability
|
|
improvements and a barely perceptible performance cost. Unless instructed to do
|
|
so by some project developers, or trying to save the last ounce of performance,
|
|
these options should not be changed. Among the usable ones are:
|
|
- -DDEBUG_STRICT: enable some runtime assertions at key places in the code.
|
|
The goal is to emit a warning or stop the program if certain expected
|
|
conditions are not met, and whose violation will result in a misbehaving
|
|
process due to memory corruption or other significant trouble, possibly
|
|
caused by an attempt to exploit a bug in the program or a library it relies
|
|
on. The option knows 3 values: 0 (disable all such assertions, the default
|
|
when the option is not set), 1 (enable all inexpensive assertions), and
|
|
2 (enable all assertions even in fast paths). Setting the option with no
|
|
value corresponds to 1, which is the recommended value for production.
|
|
|
|
- -DDEBUG_STRICT_ACTION: indicates how to react to a check violation. There
|
|
are 3 types of checks: BUG (condition that is known to have serious
|
|
consequences), WARN (warning about a highly suspicious condition which the
|
|
process may recover from, but whose unknown cause may also have serious
|
|
consequences), CHECK (verification whether a condition that developers now
|
|
consider impossible still happens). The variable takes a value from 0 to 3,
|
|
that adjusts the behavior on these 3 violations:
|
|
|
|
BUG WARN CHECK
|
|
0 warn warn warn
|
|
1 stop warn warn
|
|
2 stop stop warn
|
|
3 stop stop stop
|
|
|
|
The default value is 1, which is the best balance for production in that it
|
|
will do its best to prevent a known bogus process from running away, but
|
|
will let it run if it believes it can recover. Users running the process in
|
|
sensitive environments (finance etc) may prefer to run at level 2 to make
|
|
sure to stop any detected anomaly before it may have an impact. Level 3
|
|
should only be used at the request of developers. In any case, any emitted
|
|
warning should be reported to developers.
|
|
|
|
- -DDEBUG_MEMORY_POOLS: this enables by default extra controls around memory
|
|
allocation that will help detect coding errors such as double-frees and
|
|
freeing a bad memory location. It will also detect earlier risks of memory
|
|
overflows, which may have security implications. The cost is extremely low
|
|
(less than 1% increase in memory footprint). This is equivalent to adding
|
|
"-dMtag" on the command line. This option is enabled in the default build
|
|
options.
|
|
|
|
- -DDEBUG_DONT_SHARE_POOLS: this will keep separate pools for same-sized
|
|
objects of different types. Using this increases the memory usage a little
|
|
bit but further reduces the risk of memory management related bugs and will
|
|
lead to more accurate traces in case of error. It is equivalent to adding
|
|
"-dMno-merge" on the command line. It is not enabled in the default build
|
|
options.
|
|
|
|
- -DDEBUG_POOL_INTEGRITY: this will enable runtime detection and stopping of
|
|
a class of bugs known as "use after free", which consists in modifying a
|
|
memory area after freeing it while it was reused for something else. This
|
|
option is quite powerful but such bugs are fortunately extremely rare, and
|
|
it will cause a measurable performance degradation (a few percent). This is
|
|
equivalent to adding "-dMcold-first,integrity" on the command line. This
|
|
option is not enabled by default but users running development versions on
|
|
moderate performance sites in order to participate to reliability testing
|
|
are encouraged to use it, in combination with -DDEBUG_DONT_SHARE_POOLS and
|
|
-DDEBUG_MEMORY_POOLS, as this could catch dangerous regressions.
|
|
|
|
As such, for regular production, "-DDEBUG_STRICT -DDEBUG_MEMORY_POOLS" is
|
|
recommended. For security sensitive environments, it is recommended to use
|
|
"-DDEBUG_STRICT -DDEBUG_STRICT_ACTION=2 -DDEBUG_MEMORY_POOLS \
|
|
-DDEBUG_DONT_SHARE_POOLS". For deployments dedicated to testing new versions or
|
|
when trying to nail a bug down, use "-DDEBUG_STRICT=2 -DDEBUG_STRICT_ACTION=2 \
|
|
-DDEBUG_MEMORY_POOLS -DDEBUG_DONT_SHARE_POOLS -DDEBUG_POOL_INTEGRITY".
|
|
|
|
The DEP variable is automatically set to the list of include files and also
|
|
designates a file that contains the last build options used. It is used during
|
|
the build process to compute dependencies and decide whether or not to rebuild
|
|
everything (we do rebuild everything when .h files are touched or when build
|
|
options change). Sometimes when performing fast build iterations on inline
|
|
functions it may be desirable to avoid a full rebuild. Forcing this variable
|
|
to be empty will be sufficient to achieve this. This variable must never be
|
|
forced to produce final binaries, and must not be used during bisect sessions,
|
|
as it will often lead to the wrong commit.
|
|
|
|
If you need to pass other defines, includes, libraries, etc... then please
|
|
check the Makefile to see which ones will be available in your case, and
|
|
use/override the USE_* variables from the Makefile.
|
|
|
|
AIX 5.3 is known to work with the generic target. However, for the binary to
|
|
also run on 5.2 or earlier, you need to build with DEFINE="-D_MSGQSUPPORT",
|
|
otherwise __fd_select() will be used while not being present in the libc, but
|
|
this is easily addressed using the "aix52" target. If you get build errors
|
|
because of strange symbols or section mismatches, simply remove -g from
|
|
DEBUG_CFLAGS.
|
|
|
|
Building on AIX 7.2 works fine using the "aix72-gcc" TARGET. It adds two
|
|
special CFLAGS to prevent the loading of AIX's xmem.h and var.h. This is done
|
|
by defining the corresponding include-guards _H_XMEM and _H_VAR. Without
|
|
excluding those header-files the build fails because of redefinition errors.
|
|
Furthermore, the atomic library is added to the LDFLAGS to allow for
|
|
multithreading via USE_THREAD.
|
|
|
|
You can easily define your own target with the GNU Makefile. Unknown targets
|
|
are processed with no default option except USE_POLL=default. So you can very
|
|
well use that property to define your own set of options. USE_POLL and USE_SLZ
|
|
can even be disabled by setting them to an empty string. For example :
|
|
|
|
$ gmake TARGET=tiny USE_POLL="" USE_SLZ="" TARGET_CFLAGS=-fomit-frame-pointer
|
|
|
|
If you need to pass some defines to the preprocessor or compiler, you may pass
|
|
them all in the DEFINE variable. Example:
|
|
|
|
$ make TARGET=generic DEFINE="-DDEBUG_DONT_SHARE_POOLS -DDEBUG_MEMORY_POOLS"
|
|
|
|
The ADDINC variable may be used to add some extra include paths; this is
|
|
sometimes needed when cross-compiling. Similarly the ADDLIB variable may be
|
|
used to specifify extra paths to library files. Example :
|
|
|
|
$ make TARGET=generic ADDINC=-I/opt/cross/include ADDLIB=-L/opt/cross/lib64
|
|
|
|
|
|
6) How to install HAProxy
|
|
=========================
|
|
|
|
To install haproxy, you can either copy the single resulting binary to the
|
|
place you want, or run :
|
|
|
|
$ sudo make install
|
|
|
|
If you're packaging it for another system, you can specify its root directory
|
|
in the usual DESTDIR variable.
|
|
|
|
-- end
|