mirror of
http://git.haproxy.org/git/haproxy.git/
synced 2024-12-16 00:14:31 +00:00
f57a29a1cd
Released version 1.8-dev2 with the following main changes : - CLEANUP: server: moving netinet/tcp.h inclusion - DOC: changed "block"(deprecated) examples to http-request deny - DOC: add few comments to examples. - DOC: update sample code for PROXY protocol - DOC: mention lighttpd 1.4.46 implements PROXY - MINOR server: Restrict dynamic cookie check to the same proxy. - DOC: stick-table is available in frontend sections - BUG/MINOR: server : no transparent proxy for DragonflyBSD - BUILD/MINOR: stats: remove unexpected argument to stats_dump_json_header() - BUILD/MINOR: tools: fix build warning in debug_hexdump() - BUG/MINOR: dns: Wrong address family used when creating IPv6 sockets. - BUG/MINOR: config: missing goto out after parsing an incorrect ACL character - BUG/MINOR: arg: don't try to add an argument on failed memory allocation - MEDIUM: server: Inherit CLI weight changes and agent-check weight responses - BUG/MEDIUM: arg: ensure that we properly unlink unresolved arguments on error - BUG/MEDIUM: acl: don't free unresolved args in prune_acl_expr() - BUG/MEDIUM: servers: unbreak server weight propagation - MINOR: lua: ensure the memory allocator is used all the time - MINOR: cli: Add a command to send listening sockets. - MINOR: global: Add an option to get the old listening sockets. - MINOR: tcp: When binding socket, attempt to reuse one from the old proc. - MINOR: doc: document the -x flag - MINOR: proxy: Don't close FDs if not our proxy. - MINOR: socket transfer: Set a timeout on the socket. - MINOR: systemd wrapper: add support for passing the -x option. - BUG/MINOR: server: Fix a wrong error message during 'usesrc' keyword parsing. - BUG/MAJOR: Broken parsing for valid keywords provided after 'source' setting. - CLEANUP: logs: typo: simgle => single - BUG/MEDIUM: acl: proprely release unused args in prune_acl_expr() - MEDIUM: config: don't check config validity when there are fatal errors - BUG/MAJOR: Use -fwrapv. - BUG/MINOR: server: don't use "proxy" when px is really meant. - BUG/MEDIUM: http: Drop the connection establishment when a redirect is performed - BUG/MINOR: server: missing default server 'resolvers' setting duplication. - MINOR: server: Extract the code responsible of copying default-server settings. - MINOR: server: Extract the code which finalizes server initializations after 'server' lines parsing. - MINOR: server: Add 'server-template' new keyword supported in backend sections. - MINOR: server: Add server_template_init() function to initialize servers from a templates. - DOC: Add documentation for new "server-template" keyword. - DOC: add layer 4 links/cross reference to "block" keyword. - DOC: errloc/errorloc302/errorloc303 missing status codes. - BUG/MEDIUM: lua: memory leak - CLEANUP: lua: remove test - BUG/MINOR: hash-balance-factor isn't effective in certain circumstances - BUG/MINOR: change header-declared function to static inline - REORG: spoe: move spoe_encode_varint / spoe_decode_varint from spoe to common - MINOR: Add binary encoding request header sample fetch - MINOR: proto-http: Add sample fetch wich returns all HTTP headers - MINOR: Add ModSecurity wrapper as contrib - BUG/MINOR: ssl: fix warnings about methods for opensslv1.1. - DOC: update RFC references - CONTRIB: tcploop: add action "X" to execute a command - MINOR: server: cli: Add server FQDNs to server-state file and stats socket. - BUG/MINOR: contrib/mod_security: fix build on FreeBSD - BUG/MINOR: checks: don't send proxy protocol with agent checks - MINOR: ssl: add prefer-client-ciphers - MEDIUM: ssl: revert ssl/tls version settings relative to default-server. - MEDIUM: ssl: ssl_methods implementation is reworked and factored for min/max tlsxx - MEDIUM: ssl: calculate the real min/max TLS version and find holes - MINOR: ssl: support TLSv1.3 for bind and server - MINOR: ssl: show methods supported by openssl - MEDIUM: ssl: add ssl-min-ver and ssl-max-ver parameters for bind and server - MEDIUM: ssl: ssl-min-ver and ssl-max-ver compatibility. - CLEANUP: retire obsoleted USE_GETSOCKNAME build option - BUG/MAJOR: dns: Broken kqueue events handling (BSD systems). - MINOR: sample: Add b64dec sample converter - BUG/MEDIUM: lua: segfault if a converter or a sample doesn't return anything - MINOR: cli: add ACCESS_LVL_MASK to store the access level - MINOR: cli: add 'expose-fd listeners' to pass listeners FDs - MEDIUM: proxy: zombify proxies only when the expose-fd socket is bound - MEDIUM: ssl: add basic support for OpenSSL crypto engine - MAJOR: ssl: add openssl async mode support - MEDIUM: ssl: handle multiple async engines - MINOR: boringssl: basic support for OCSP Stapling - MEDIUM: mworker: replace systemd mode by master worker mode - MEDIUM: mworker: handle reload and signals - MEDIUM: mworker: wait mode on reload failure - MEDIUM: mworker: try to guess the next stats socket to use with -x - MEDIUM: mworker: exit-on-failure option - MEDIUM: mworker: workers exit when the master leaves - DOC: add documentation for the master-worker mode - MEDIUM: systemd: Type=forking in unit file - MAJOR: systemd-wrapper: get rid of the wrapper - MINOR: log: Add logurilen tunable. - CLEANUP: server.c: missing prototype of srv_free_dns_resolution - MINOR: dns: smallest DNS fqdn size - MINOR: dns: functions to manage memory for a DNS resolution structure - MINOR: dns: parse_server() now uses srv_alloc_dns_resolution() - REORG: dns: dns_option structure, storage of hostname_dn - MINOR: dns: new snr_check_ip_callback function - MAJOR: dns: save a copy of the DNS response in struct resolution - MINOR: dns: implement a LRU cache for DNS resolutions - MINOR: dns: make 'ancount' field to match the number of saved records - MINOR: dns: introduce roundrobin into the internal cache (WIP) - MAJOR/REORG: dns: DNS resolution task and requester queues - BUILD: ssl: fix build with OPENSSL_NO_ENGINE - MINOR: Add Mod Defender integration as contrib - CLEANUP: str2mask return code comment: non-zero -> zero. - MINOR: tools: make debug_hexdump() use a const char for the string - MINOR: tools: make debug_hexdump() take a string prefix - CLEANUP: connection: remove unused CO_FL_WAIT_DATA
325 lines
15 KiB
Plaintext
325 lines
15 KiB
Plaintext
----------------------
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HAProxy how-to
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----------------------
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version 1.8
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willy tarreau
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2017/06/02
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1) How to build it
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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. If you are not used to build from sources or if you are not used
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to follow updates then it is recommended that instead you use the packages provided
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by your software vendor or Linux distribution. Most of them are taking this task
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seriously and are doing a good job at backporting important fixes. If for any
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reason you'd prefer a different version than the one packaged for your system,
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you want to be certain to have all the fixes or to get some commercial support,
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other choices are available at :
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http://www.haproxy.com/
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To build haproxy, you will need :
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- GNU make. Neither Solaris nor OpenBSD's make work with the GNU Makefile.
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If you get many syntax errors when running "make", you may want to retry
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with "gmake" which is the name commonly used for GNU make on BSD systems.
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- GCC between 2.95 and 4.8. Others may work, but not tested.
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- GNU ld
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Also, you might want to build with libpcre support, which will provide a very
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efficient regex implementation and will also fix some badness on Solaris' one.
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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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- linux22 for Linux 2.2
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- linux24 for Linux 2.4 and above (default)
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- linux24e for Linux 2.4 with support for a working epoll (> 0.21)
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- linux26 for Linux 2.6 and above
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- linux2628 for Linux 2.6.28, 3.x, and above (enables splice and tproxy)
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- solaris for Solaris 8 or 10 (others untested)
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- freebsd for FreeBSD 5 to 10 (others untested)
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- netbsd for NetBSD
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- osx for Mac OS/X
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- openbsd for OpenBSD 5.7 and above
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- aix51 for AIX 5.1
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- aix52 for AIX 5.2
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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
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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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- native : use the build machine's specific processor optimizations. Use with
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extreme care, and never in virtualized environments (known to break).
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- generic : any other processor or no CPU-specific optimization. (default)
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Alternatively, you may just set the CPU_CFLAGS value to the optimal GCC options
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for your platform.
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You may want to build specific target binaries which do not match your native
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compiler's target. This is particularly true on 64-bit systems when you want
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to build a 32-bit binary. Use the ARCH variable for this purpose. Right now
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it only knows about a few x86 variants (i386,i486,i586,i686,x86_64), two
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generic ones (32,64) and sets -m32/-m64 as well as -march=<arch> accordingly.
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If your system supports PCRE (Perl Compatible Regular Expressions), then you
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really should build with libpcre which is between 2 and 10 times faster than
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other libc implementations. Regex are used for header processing (deletion,
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rewriting, allow, deny). The only inconvenient of libpcre is that it is not
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yet widely spread, so if you build for other systems, you might get into
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trouble if they don't have the dynamic library. In this situation, you should
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statically link libpcre into haproxy so that it will not be necessary to
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install it on target systems. Available build options for PCRE are :
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- USE_PCRE=1 to use libpcre, in whatever form is available on your system
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(shared or static)
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- USE_STATIC_PCRE=1 to use a static version of libpcre even if the dynamic
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one is available. This will enhance portability.
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- with no option, use your OS libc's standard regex implementation (default).
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Warning! group references on Solaris seem broken. Use static-pcre whenever
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possible.
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If your system doesn't provide PCRE, you are encouraged to download it from
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http://www.pcre.org/ and build it yourself, it's fast and easy.
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Recent systems can resolve IPv6 host names using getaddrinfo(). This primitive
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is not present in all libcs and does not work in all of them either. Support in
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glibc was broken before 2.3. Some embedded libs may not properly work either,
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thus, support is disabled by default, meaning that some host names which only
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resolve as IPv6 addresses will not resolve and configs might emit an error
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during parsing. If you know that your OS libc has reliable support for
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getaddrinfo(), you can add USE_GETADDRINFO=1 on the make command line to enable
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it. This is the recommended option for most Linux distro packagers since it's
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working fine on all recent mainstream distros. It is automatically enabled on
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Solaris 8 and above, as it's known to work.
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It is possible to add native support for SSL using the GNU makefile, by passing
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"USE_OPENSSL=1" on the make command line. The libssl and libcrypto will
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automatically be linked with haproxy. Some systems also require libz, so if the
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build fails due to missing symbols such as deflateInit(), then try again with
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"ADDLIB=-lz".
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Your are strongly encouraged to always use an up-to-date version of OpenSSL, as
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found on https://www.openssl.org/ as vulnerabilities are occasionally found and
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you don't want them on your systems. HAProxy is known to build correctly on all
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currently supported branches (0.9.8, 1.0.0, 1.0.1 and 1.0.2 at the time of
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writing). Branch 1.0.2 is recommended for the richest features.
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To link OpenSSL statically against haproxy, build OpenSSL with the no-shared
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keyword and 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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When building haproxy, pass that path via SSL_INC and SSL_LIB to make and
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include additional libs with ADDLIB if needed (in this case for example libdl):
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$ make TARGET=linux26 USE_OPENSSL=1 SSL_INC=$STATICLIBSSL/include SSL_LIB=$STATICLIBSSL/lib ADDLIB=-ldl
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It is also possible to include native support for zlib to benefit from HTTP
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compression. For this, pass "USE_ZLIB=1" on the "make" command line and ensure
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that zlib is present on the system. Alternatively it is possible to use libslz
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for a faster, memory less, but slightly less efficient compression, by passing
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"USE_SLZ=1".
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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. Libslz can be downloaded
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from http://1wt.eu/projects/libslz/ and is even easier to build.
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By default, the DEBUG variable is set to '-g' to enable debug symbols. It is
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not wise to disable it on uncommon systems, because it's often the only way to
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get a complete core when you need one. Otherwise, you can set DEBUG to '-s' to
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strip the binary.
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For example, I use this to build for Solaris 8 :
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$ make TARGET=solaris CPU=ultrasparc USE_STATIC_PCRE=1
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And I build it this way on OpenBSD or FreeBSD :
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$ gmake TARGET=freebsd USE_PCRE=1 USE_OPENSSL=1 USE_ZLIB=1
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And on a classic Linux with SSL and ZLIB support (eg: Red Hat 5.x) :
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$ make TARGET=linux26 USE_PCRE=1 USE_OPENSSL=1 USE_ZLIB=1
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And on a recent Linux >= 2.6.28 with SSL and ZLIB support :
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$ make TARGET=linux2628 USE_PCRE=1 USE_OPENSSL=1 USE_ZLIB=1
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In order to build a 32-bit binary on an x86_64 Linux system with SSL support
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without support for compression but when OpenSSL requires ZLIB anyway :
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$ make TARGET=linux26 ARCH=i386 USE_OPENSSL=1 ADDLIB=-lz
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The SSL stack supports session cache synchronization between all running
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processes. This involves some atomic operations and synchronization operations
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which come in multiple flavors depending on the system and architecture :
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Atomic operations :
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- internal assembler versions for x86/x86_64 architectures
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- gcc builtins for other architectures. Some architectures might not
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be fully supported or might require a more recent version of gcc.
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If your architecture is not supported, you willy have to either use
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pthread if supported, or to disable the shared cache.
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- pthread (posix threads). Pthreads are very common but inter-process
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support is not that common, and some older operating systems did not
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report an error when enabling multi-process mode, so they used to
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silently fail, possibly causing crashes. Linux's implementation is
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fine. OpenBSD doesn't support them and doesn't build. FreeBSD 9 builds
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and reports an error at runtime, while certain older versions might
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silently fail. Pthreads are enabled using USE_PTHREAD_PSHARED=1.
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Synchronization operations :
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- internal spinlock : this mode is OS-independant, light but will not
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scale well to many processes. However, accesses to the session cache
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are rare enough that this mode could certainly always be used. This
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is the default mode.
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- Futexes, which are Linux-specific highly scalable light weight mutexes
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implemented in user-space with some limited assistance from the kernel.
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This is the default on Linux 2.6 and above and is enabled by passing
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USE_FUTEX=1
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- pthread (posix threads). See above.
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If none of these mechanisms is supported by your platform, you may need to
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build with USE_PRIVATE_CACHE=1 to totally disable SSL cache sharing. Then
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it is better not to run SSL on multiple processes.
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If you need to pass other defines, includes, libraries, etc... then please
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check the Makefile to see which ones will be available in your case, and
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use the USE_* variables in the Makefile.
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AIX 5.3 is known to work with the generic target. However, for the binary to
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also run on 5.2 or earlier, you need to build with DEFINE="-D_MSGQSUPPORT",
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otherwise __fd_select() will be used while not being present in the libc, but
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this is easily addressed using the "aix52" target. If you get build errors
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because of strange symbols or section mismatches, simply remove -g from
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DEBUG_CFLAGS.
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You can easily define your own target with the GNU Makefile. Unknown targets
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are processed with no default option except USE_POLL=default. So you can very
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well use that property to define your own set of options. USE_POLL can even be
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disabled by setting USE_POLL="". For example :
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$ gmake TARGET=tiny USE_POLL="" TARGET_CFLAGS=-fomit-frame-pointer
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1.1) 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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2) How to install it
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--------------------
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To install haproxy, you can either copy the single resulting binary to the
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place you want, or run :
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$ sudo make install
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If you're packaging it for another system, you can specify its root directory
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in the usual DESTDIR variable.
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3) How to set it up
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-------------------
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There is some documentation in the doc/ directory :
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- intro.txt : this is an introduction to haproxy, it explains what it is
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what it is not. Useful for beginners or to re-discover it when planning
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for an upgrade.
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- architecture.txt : this is the architecture manual. It is quite old and
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does not tell about the nice new features, but it's still a good starting
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point when you know what you want but don't know how to do it.
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- configuration.txt : this is the configuration manual. It recalls a few
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essential HTTP basic concepts, and details all the configuration file
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syntax (keywords, units). It also describes the log and stats format. It
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is normally always up to date. If you see that something is missing from
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it, please report it as this is a bug. Please note that this file is
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huge and that it's generally more convenient to review Cyril Bont<6E>'s
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HTML translation online here :
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http://cbonte.github.io/haproxy-dconv/configuration-1.6.html
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- management.txt : it explains how to start haproxy, how to manage it at
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runtime, how to manage it on multiple nodes, how to proceed with seamless
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upgrades.
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- gpl.txt / lgpl.txt : the copy of the licenses covering the software. See
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the 'LICENSE' file at the top for more information.
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- the rest is mainly for developers.
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There are also a number of nice configuration examples in the "examples"
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directory as well as on several sites and articles on the net which are linked
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to from the haproxy web site.
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4) How to report a bug
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----------------------
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It is possible that from time to time you'll find a bug. A bug is a case where
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what you see is not what is documented. Otherwise it can be a misdesign. If you
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find that something is stupidly design, please discuss it on the list (see the
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"how to contribute" section below). If you feel like you're proceeding right
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and haproxy doesn't obey, then first ask yourself if it is possible that nobody
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before you has even encountered this issue. If it's unlikely, the you probably
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have an issue in your setup. Just in case of doubt, please consult the mailing
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list archives :
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http://marc.info/?l=haproxy
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Otherwise, please try to gather the maximum amount of information to help
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reproduce the issue and send that to the mailing list :
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haproxy@formilux.org
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Please include your configuration and logs. You can mask your IP addresses and
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passwords, we don't need them. But it's essential that you post your config if
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you want people to guess what is happening.
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Also, keep in mind that haproxy is designed to NEVER CRASH. If you see it die
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without any reason, then it definitely is a critical bug that must be reported
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and urgently fixed. It has happened a couple of times in the past, essentially
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on development versions running on new architectures. If you think your setup
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is fairly common, then it is possible that the issue is totally unrelated.
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Anyway, if that happens, feel free to contact me directly, as I will give you
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instructions on how to collect a usable core file, and will probably ask for
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other captures that you'll not want to share with the list.
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5) How to contribute
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--------------------
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Please carefully read the CONTRIBUTING file that comes with the sources. It is
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mandatory.
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-- end
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