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Support having multiple Unix-domain sockets per postmaster.

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Replace unix_socket_directory with unix_socket_directories, which is a list
of socket directories, and adjust postmaster's code to allow zero or more
Unix-domain sockets to be created.

This is mostly a straightforward change, but since the Unix sockets ought
to be created after the TCP/IP sockets for safety reasons (better chance
of detecting a port number conflict), AddToDataDirLockFile needs to be
fixed to support out-of-order updates of data directory lockfile lines.
That's a change that had been foreseen to be necessary someday anyway.

Honza Horak, reviewed and revised by Tom Lane
This commit is contained in:
Tom Lane
2012-08-10 17:26:44 -04:00
parent 85642ec00b
commit c9b0cbe98b
17 changed files with 369 additions and 126 deletions
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12
src/backend/utils/misc/guc.c
View File

@@ -2895,14 +2895,18 @@ static struct config_string ConfigureNamesString[] =
},
{
{"unix_socket_directory", PGC_POSTMASTER, CONN_AUTH_SETTINGS,
gettext_noop("Sets the directory where the Unix-domain socket will be created."),
{"unix_socket_directories", PGC_POSTMASTER, CONN_AUTH_SETTINGS,
gettext_noop("Sets the directories where Unix-domain sockets will be created."),
NULL,
GUC_SUPERUSER_ONLY
},
&UnixSocketDir,
&Unix_socket_directories,
#ifdef HAVE_UNIX_SOCKETS
DEFAULT_PGSOCKET_DIR,
#else
"",
check_canonical_path, NULL, NULL
#endif
NULL, NULL, NULL
},
{

3
src/backend/utils/misc/postgresql.conf.sample
View File

@@ -65,7 +65,8 @@
# Note: Increasing max_connections costs ~400 bytes of shared memory per
# connection slot, plus lock space (see max_locks_per_transaction).
#superuser_reserved_connections = 3 # (change requires restart)
#unix_socket_directory = '' # (change requires restart)
#unix_socket_directories = '/tmp' # comma-separated list of directories
# (change requires restart)
#unix_socket_group = '' # (change requires restart)
#unix_socket_permissions = 0777 # begin with 0 to use octal notation
# (change requires restart)