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| author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 16:18:56 +0000 |
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| committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 16:18:56 +0000 |
| commit | b7c15c31519dc44c1f691e0466badd556ffe9423 (patch) | |
| tree | f944572f288bab482a615e09af627d9a2b6727d8 /proto/PGSQL_README.html | |
| parent | Initial commit. (diff) | |
| download | postfix-b7c15c31519dc44c1f691e0466badd556ffe9423.tar.xz postfix-b7c15c31519dc44c1f691e0466badd556ffe9423.zip | |
Adding upstream version 3.7.10.upstream/3.7.10
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'proto/PGSQL_README.html')
| -rw-r--r-- | proto/PGSQL_README.html | 174 |
1 files changed, 174 insertions, 0 deletions
diff --git a/proto/PGSQL_README.html b/proto/PGSQL_README.html new file mode 100644 index 0000000..61445ba --- /dev/null +++ b/proto/PGSQL_README.html @@ -0,0 +1,174 @@ +<!doctype html public "-//W3C//DTD HTML 4.01 Transitional//EN" + "http://www.w3.org/TR/html4/loose.dtd"> + +<html> + +<head> + +<title>Postfix PostgreSQL Howto</title> + +<meta http-equiv="Content-Type" content="text/html; charset=utf-8"> + +</head> + +<body> + +<h1><img src="postfix-logo.jpg" width="203" height="98" ALT="">Postfix PostgreSQL Howto</h1> + +<hr> + +<h2>Introduction</h2> + +<p> The Postfix pgsql map type allows you to hook up Postfix to a +PostgreSQL database. This implementation allows for multiple pgsql +databases: you can use one for a virtual(5) table, one for an +access(5) table, and one for an aliases(5) table if you want. You +can specify multiple servers for the same database, so that Postfix +can switch to a good database server if one goes bad. </p> + +<p> Busy mail servers using pgsql maps will generate lots of +concurrent pgsql clients, so the pgsql server(s) should be run with +this fact in mind. You can reduce the number of concurrent pgsql +clients by using the Postfix proxymap(8) service. </p> + +<h2>Building Postfix with PostgreSQL support</h2> + +<p> These instructions assume that you build Postfix from source +code as described in the INSTALL document. Some modification may +be required if you build Postfix from a vendor-specific source +package. </p> + +<p> Note: to use pgsql with Debian GNU/Linux's Postfix, all you +need to do is to install the postfix-pgsql package and you're done. +There is no need to recompile Postfix. </p> + +<p> In order to build Postfix with pgsql map support, you specify +-DHAS_PGSQL, the directory with the PostgreSQL header files, and +the location of the libpq library file. </p> + +<p> For example: </p> + +<blockquote> +<pre> +% make tidy +% make -f Makefile.init makefiles \ + 'CCARGS=-DHAS_PGSQL -I/usr/local/include/pgsql' \ + 'AUXLIBS_PGSQL=-L/usr/local/lib -lpq' +</pre> +</blockquote> + +<p> If your PostgreSQL shared library is in a directory that the RUN-TIME +linker does not know about, add a "-Wl,-R,/path/to/directory" option after +"-lpq". </p> + +<p> Postfix versions before 3.0 use AUXLIBS instead of AUXLIBS_PGSQL. +With Postfix 3.0 and later, the old AUXLIBS variable still supports +building a statically-loaded PostgreSQL database client, but only +the new AUXLIBS_PGSQL variable supports building a dynamically-loaded +or statically-loaded PostgreSQL database client. </p> + +<blockquote> + +<p> Failure to use the AUXLIBS_PGSQL variable will defeat the purpose +of dynamic database client loading. Every Postfix executable file +will have PGSQL database library dependencies. And that was exactly +what dynamic database client loading was meant to avoid. </p> + +</blockquote> + +<p> Then just run 'make'. </p> + +<h2>Configuring PostgreSQL lookup tables</h2> + +<p> Once Postfix is built with pgsql support, you can specify a +map type in main.cf like this: </p> + +<blockquote> +<pre> +/etc/postfix/main.cf: + alias_maps = pgsql:/etc/postfix/pgsql-aliases.cf +</pre> +</blockquote> + +<p> The file /etc/postfix/pgsql-aliases.cf specifies lots of +information telling postfix how to reference the pgsql database. +For a complete description, see the pgsql_table(5) manual page. </p> + +<h2>Example: local aliases </h2> + +<pre> +# +# pgsql config file for local(8) aliases(5) lookups +# + +# +# The hosts that Postfix will try to connect to +hosts = host1.some.domain host2.some.domain + +# The user name and password to log into the pgsql server. +user = someone +password = some_password + +# The database name on the servers. +dbname = customer_database + +# Postfix 2.2 and later The SQL query template. See pgsql_table(5). +query = SELECT forw_addr FROM mxaliases WHERE alias='%s' AND status='paid' + +# For Postfix releases prior to 2.2. See pgsql_table(5) for details. +select_field = forw_addr +table = mxaliases +where_field = alias +# Don't forget the leading "AND"! +additional_conditions = AND status = 'paid' +</pre> + +<h2>Using mirrored databases</h2> + +<p> Sites that have a need for multiple mail exchangers may enjoy +the convenience of using a networked mailer database, but do not +want to introduce a single point of failure to their system. </p> + +<p> For this reason we've included the ability to have Postfix +reference multiple hosts for access to a single pgsql map. This +will work if sites set up mirrored pgsql databases on two or more +hosts. </p> + +<p> Whenever queries fail with an error at one host, the rest of +the hosts will be tried in random order. If no pgsql server hosts +are reachable, then mail will be deferred until at least one of +those hosts is reachable. </p> + +<h2>Credits</h2> + +<ul> + +<li> This code is based upon the Postfix mysql map by Scott Cotton +and Joshua Marcus, IC Group, Inc.</li> + +<li> The PostgreSQL changes were done by Aaron Sethman.</li> + +<li> Updates for Postfix 1.1.x and PostgreSQL 7.1+ and support for +calling stored procedures were added by Philip Warner.</li> + +<li> LaMont Jones was the initial Postfix pgsql maintainer.</li> + +<li> Liviu Daia revised the configuration interface and added the +main.cf configuration feature.</li> + +<li> Liviu Daia revised the configuration interface and added the main.cf +configuration feature.</li> + +<li> Liviu Daia with further refinements from Jose Luis Tallon and +Victor Duchovni developed the common query, result_format, domain and +expansion_limit interface for LDAP, MySQL and PosgreSQL.</li> + +<li> Leandro Santi updated the PostgreSQL client after the PostgreSQL +developers made major database API changes in response to SQL +injection problems, and made PQexec() handling more robust. </li> + +</ul> + +</body> + +</html> |