By Alvin Alexander. Last updated: June 4, 2016
Over the weekend I was trying to configure Apache as a reverse-proxy server (specifically as a reverse-proxy server working in conjunction with OpenSSO), and I couldn't get it to work at all. It's been a while since I last installed Apache, and I assumed it was configured with the modproxy module by default, but it turns out that it's not: You have to configure Apache with the mod_proxy module at installation time in order for things like the ProxyPass configuration to work.
So, as a quick note to self, here are the options I used with the configure command when installing Apache from the source distribution this weekend, taken directly from the shell script I created:
./configure --prefix=/usr/local/apache2.0 \
--enable-proxy \
--enable-proxy-connect \
--enable-proxy-http \
--enable-rewrite
Frankly, I don't know if all of those options are necessary; I was in a hurry and just added them all without fully researching them. This is not a production server, so it doesn't really matter to me at the moment. So, for your own Apache web server configuration, you should research these settings to figure out exactly what you do need.
How to determine all the Apache configuration options
If you want to see all the Apache web server configuration options, just add the --help flag to the configure command. Here's how I issue this command, and the output I get from the configure script for Apache 2.0.63 on a Linux system:
$ ./configure --help
'configure' configures this package to adapt to many kinds of systems.
Usage: ./configure [OPTION]... [VAR=VALUE]...
To assign environment variables (e.g., CC, CFLAGS...), specify them as
VAR=VALUE. See below for descriptions of some of the useful variables.
Defaults for the options are specified in brackets.
Configuration:
-h, --help display this help and exit
--help=short display options specific to this package
--help=recursive display the short help of all the included packages
-V, --version display version information and exit
-q, --quiet, --silent do not print `checking...' messages
--cache-file=FILE cache test results in FILE [disabled]
-C, --config-cache alias for `--cache-file=config.cache'
-n, --no-create do not create output files
--srcdir=DIR find the sources in DIR [configure dir or `..']
Installation directories:
--prefix=PREFIX install architecture-independent files in PREFIX
[/usr/local/apache2]
--exec-prefix=EPREFIX install architecture-dependent files in EPREFIX
[PREFIX]
By default, `make install' will install all the files in
`/usr/local/apache2/bin', `/usr/local/apache2/lib' etc. You can specify
an installation prefix other than `/usr/local/apache2' using `--prefix',
for instance `--prefix=$HOME'.
For better control, use the options below.
Fine tuning of the installation directories:
--bindir=DIR user executables [EPREFIX/bin]
--sbindir=DIR system admin executables [EPREFIX/sbin]
--libexecdir=DIR program executables [EPREFIX/libexec]
--sysconfdir=DIR read-only single-machine data [PREFIX/etc]
--sharedstatedir=DIR modifiable architecture-independent data [PREFIX/com]
--localstatedir=DIR modifiable single-machine data [PREFIX/var]
--libdir=DIR object code libraries [EPREFIX/lib]
--includedir=DIR C header files [PREFIX/include]
--oldincludedir=DIR C header files for non-gcc [/usr/include]
--datarootdir=DIR read-only arch.-independent data root [PREFIX/share]
--datadir=DIR read-only architecture-independent data [DATAROOTDIR]
--infodir=DIR info documentation [DATAROOTDIR/info]
--localedir=DIR locale-dependent data [DATAROOTDIR/locale]
--mandir=DIR man documentation [DATAROOTDIR/man]
--docdir=DIR documentation root [DATAROOTDIR/doc/PACKAGE]
--htmldir=DIR html documentation [DOCDIR]
--dvidir=DIR dvi documentation [DOCDIR]
--pdfdir=DIR pdf documentation [DOCDIR]
--psdir=DIR ps documentation [DOCDIR]
System types:
--build=BUILD configure for building on BUILD [guessed]
--host=HOST cross-compile to build programs to run on HOST [BUILD]
--target=TARGET configure for building compilers for TARGET [HOST]
Optional Features:
--disable-FEATURE do not include FEATURE (same as --enable-FEATURE=no)
--enable-FEATURE[=ARG] include FEATURE [ARG=yes]
--enable-layout=LAYOUT
--enable-v4-mapped Allow IPv6 sockets to handle IPv4 connections
--enable-exception-hook Enable fatal exception hook
--enable-maintainer-mode
Turn on debugging and compile time warnings
--enable-modules=MODULE-LIST
Modules to enable
--enable-mods-shared=MODULE-LIST
Shared modules to enable
--disable-access host-based access control
--disable-auth user-based access control
--enable-auth-anon anonymous user access
--enable-auth-dbm DBM-based access databases
--enable-auth-digest RFC2617 Digest authentication
--enable-isapi isapi extension support
--enable-file-cache File cache
--enable-echo ECHO server
--disable-charset-lite character set translation
--enable-charset-lite character set translation
--enable-cache dynamic file caching
--enable-disk-cache disk caching module
--enable-mem-cache memory caching module
--enable-example example and demo module
--enable-case-filter example uppercase conversion filter
--enable-case-filter-in example uppercase conversion input filter
--enable-dumpio I/O dump filter
--enable-ldap LDAP caching and connection pooling services
--enable-auth-ldap LDAP based authentication
--enable-ext-filter external filter module
--disable-include Server Side Includes
--enable-deflate Deflate transfer encoding support
--disable-log-config logging configuration
--enable-log-forensic forensic logging
--enable-logio input and output logging
--disable-env clearing/setting of ENV vars
--enable-mime-magic automagically determining MIME type
--enable-cern-meta CERN-type meta files
--enable-expires Expires header control
--enable-headers HTTP header control
--enable-usertrack user-session tracking
--enable-unique-id per-request unique ids
--disable-setenvif basing ENV vars on headers
--enable-version determining httpd version in config files
--enable-proxy Apache proxy module
--enable-proxy-connect Apache proxy CONNECT module
--enable-proxy-ftp Apache proxy FTP module
--enable-proxy-http Apache proxy HTTP module
--enable-ssl SSL/TLS support (mod_ssl)
--enable-optional-hook-export
example optional hook exporter
--enable-optional-hook-import
example optional hook importer
--enable-optional-fn-import
example optional function importer
--enable-optional-fn-export
example optional function exporter
--enable-bucketeer buckets manipulation filter
--enable-static-support Build a statically linked version the support
binaries
--enable-static-htpasswd
Build a statically linked version of htpasswd
--enable-static-htdigest
Build a statically linked version of htdigest
--enable-static-rotatelogs
Build a statically linked version of rotatelogs
--enable-static-logresolve
Build a statically linked version of logresolve
--enable-static-htdbm Build a statically linked version of htdbm
--enable-static-ab Build a statically linked version of ab
--enable-static-checkgid
Build a statically linked version of checkgid
--enable-http HTTP protocol handling
--disable-mime mapping of file-extension to MIME
--enable-dav WebDAV protocol handling
--disable-status process/thread monitoring
--disable-autoindex directory listing
--disable-asis as-is filetypes
--enable-info server information
--enable-suexec set uid and gid for spawned processes
--disable-cgid CGI scripts
--enable-cgi CGI scripts
--disable-cgi CGI scripts
--enable-cgid CGI scripts
--enable-dav-fs DAV provider for the filesystem
--enable-vhost-alias mass virtual hosting module
--disable-negotiation content negotiation
--disable-dir directory request handling
--disable-imap server-side imagemaps
--disable-actions Action triggering on requests
--enable-speling correct common URL misspellings
--disable-userdir mapping of requests to user-specific directories
--disable-alias mapping of requests to different filesystem parts
--enable-rewrite rule based URL manipulation
--enable-so DSO capability
Optional Packages:
--with-PACKAGE[=ARG] use PACKAGE [ARG=yes]
--without-PACKAGE do not use PACKAGE (same as --with-PACKAGE=no)
--with-apr=DIR|FILE prefix for installed APR, path to APR build tree,
or the full path to apr-config
--with-apr-util=DIR prefix for installed APU, or path to APU build tree
--with-port=PORT Port on which to listen (default is 80)
--with-z=DIR use a specific zlib library
--with-ssl=DIR SSL/TLS toolkit (OpenSSL)
--with-mpm=MPM Choose the process model for Apache to use.
MPM={beos|worker|prefork|mpmt_os2|perchild|leader|threadpool}
--with-module=module-type:module-file
Enable module-file in the modules/<module-type>
directory.
--with-program-name alternate executable name
--with-suexec-bin Path to suexec binary
--with-suexec-caller User allowed to call SuExec
--with-suexec-userdir User subdirectory
--with-suexec-docroot SuExec root directory
--with-suexec-uidmin Minimal allowed UID
--with-suexec-gidmin Minimal allowed GID
--with-suexec-logfile Set the logfile
--with-suexec-safepath Set the safepath
--with-suexec-umask umask for suexec'd process
Some influential environment variables:
CC C compiler command
CFLAGS C compiler flags
LDFLAGS linker flags, e.g. -L<lib dir> if you have libraries in a
nonstandard directory <lib dir>
CPPFLAGS C/C++/Objective C preprocessor flags, e.g. -I<include dir> if
you have headers in a nonstandard directory <include dir>
CPP C preprocessor
Use these variables to override the choices made by `configure' or to help it to find libraries and programs with nonstandard names/locations.
books by alvin
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