使用 MySQL 設置 PHP 5.4 以使用 Unix 套接字

我已經5.4.5從原始碼編譯了 PHP，並且在我的 Ubuntu 11.04 LTS 伺服器上安裝了 apt-get 的 nginx1.2.1和 mysql 5.1.63-0ubuntu0.11.04.1。

我使用這個安裝了 nginx：

add-apt-repository ppa:nginx/stable
echo "deb http://ppa.launchpad.net/nginx/stable/ubuntu lucid main" > /etc/apt/sources.list.d/nginx-stable-lucid.list
apt-key adv --keyserver keyserver.ubuntu.com --recv-keys C300EE8C
apt-get update
apt-get install nginx

我已經使用以下配置設置編譯了 PHP 5.4.5：

./configure --enable-fpm --with-mcrypt --with-zlib --enable-mbstring --with-openssl --with-gd --with-jpeg-dir=/usr/lib --with-png-dir=/usr/lib --enable-gd-native-ttf --with-curl --enable-ftp --with-mysql=mysqlnd --with-mysqli=mysqlnd --with-pdo-mysql=mysqlnd --enable-zip

我已經使用這個安裝了mysql：

apt-get install mysql-server mysql-common mysql-client

mysql my.cnf 文件是 stock，sock 文件仍然位於/var/run/mysqld/mysqld.sock. Nginx 和 PHP 在/var/run/php/php.sock.

目前，我似乎根本無法讓 PHP 連接到 MySQL 伺服器，它總是說我有這個錯誤Connect Error (2002) No such file or directory.

這是我的 php.ini 文件：

[date]
date.default_latitude = "40.725314"
date.default_longitude = "-73.498986"
date.timezone = "America/New_York"

[mysql]
mysql.allow_local_infile = "On"
mysql.allow_persistent = "On"
mysql.connect_timeout = 60
mysql.default_host = "localhost"
mysql.default_password = "password"
mysql.default_port = "3306"
mysql.default_socket = "unix:/var/run/mysqld/mysqld.sock"
mysql.default_user  = "username"
mysql.max_links = "16"
mysql.max_persistent = "8"
mysql.trace_mode = "Off"

[pdo]
pdo_mysql.default_socket = "unix:/var/run/mysqld/mysqld.sock"

這是我的 my.cnf 文件：

#
# The MySQL database server configuration file.
#
# You can copy this to one of:
# - "/etc/mysql/my.cnf" to set global options,
# - "~/.my.cnf" to set user-specific options.
# 
# One can use all long options that the program supports.
# Run program with --help to get a list of available options and with
# --print-defaults to see which it would actually understand and use.
#
# For explanations see
# http://dev.mysql.com/doc/mysql/en/server-system-variables.html

# This will be passed to all mysql clients
# It has been reported that passwords should be enclosed with ticks/quotes
# escpecially if they contain "#" chars...
# Remember to edit /etc/mysql/debian.cnf when changing the socket location.
[client]
port        = 3306
socket      = /var/run/mysqld/mysqld.sock

# Here is entries for some specific programs
# The following values assume you have at least 32M ram

# This was formally known as [safe_mysqld]. Both versions are currently parsed.
[mysqld_safe]
socket      = /var/run/mysqld/mysqld.sock
nice        = 0

[mysqld]
#
# * Basic Settings
#

#
# * IMPORTANT
#   If you make changes to these settings and your system uses apparmor, you may
#   also need to also adjust /etc/apparmor.d/usr.sbin.mysqld.
#

user        = mysql
socket      = /var/run/mysqld/mysqld.sock
port        = 3306
basedir     = /usr
datadir     = /var/lib/mysql
tmpdir      = /tmp
skip-external-locking
#
# Instead of skip-networking the default is now to listen only on
# localhost which is more compatible and is not less secure.
bind-address        = 127.0.0.1
#
# * Fine Tuning
#
key_buffer      = 16M
max_allowed_packet  = 16M
thread_stack        = 192K
thread_cache_size       = 8
# This replaces the startup script and checks MyISAM tables if needed
# the first time they are touched
myisam-recover         = BACKUP
#max_connections        = 100
#table_cache            = 64
#thread_concurrency     = 10
#
# * Query Cache Configuration
#
query_cache_limit   = 1M
query_cache_size        = 16M
#
# * Logging and Replication
#
# Both location gets rotated by the cronjob.
# Be aware that this log type is a performance killer.
# As of 5.1 you can enable the log at runtime!
#general_log_file        = /var/log/mysql/mysql.log
#general_log             = 1

log_error                = /var/log/mysql/error.log

# Here you can see queries with especially long duration
#log_slow_queries   = /var/log/mysql/mysql-slow.log
#long_query_time = 2
#log-queries-not-using-indexes
#
# The following can be used as easy to replay backup logs or for replication.
# note: if you are setting up a replication slave, see README.Debian about
#       other settings you may need to change.
#server-id      = 1
#log_bin            = /var/log/mysql/mysql-bin.log
expire_logs_days    = 10
max_binlog_size         = 100M
#binlog_do_db       = include_database_name
#binlog_ignore_db   = include_database_name
#
# * InnoDB
#
# InnoDB is enabled by default with a 10MB datafile in /var/lib/mysql/.
# Read the manual for more InnoDB related options. There are many!
#
# * Security Features
#
# Read the manual, too, if you want chroot!
# chroot = /var/lib/mysql/
#
# For generating SSL certificates I recommend the OpenSSL GUI "tinyca".
#
# ssl-ca=/etc/mysql/cacert.pem
# ssl-cert=/etc/mysql/server-cert.pem
# ssl-key=/etc/mysql/server-key.pem



[mysqldump]
quick
quote-names
max_allowed_packet  = 16M

[mysql]
#no-auto-rehash # faster start of mysql but no tab completition

[isamchk]
key_buffer      = 16M

#
# * IMPORTANT: Additional settings that can override those from this file!
#   The files must end with '.cnf', otherwise they'll be ignored.
#
!includedir /etc/mysql/conf.d/

我可以確認該/var/run/mysqld/mysqld.sock文件在那裡，並且它的配置與其姊妹目錄中的文件完全相同/var/run/php/php.sock，所以我不知道為什麼一個不能連接到另一個。任何想法將不勝感激。

我試過mysql.default_socketand pdo_mysql.default_socketas unix:/var/run/mysqld/mysqld.sockand /var/run/mysqld/mysqld.sock。

由於 www-data 無法使用 mysql cli 客戶端連接到 mysql，我懷疑一定存在權限問題。

您可以…嗎 ：

• 檢查root是否可以連接到mysql

# mysql -u root -p -S /var/run/mysqld/mysql.sock

• 檢查 www-data 哪裡有權限問題

# su - www-data -s /bin/bash

然後 ：

$ ls -l /var/run/mysqld/mysql.sock

$ ls -l /var/run/mysqld

引用自：https://serverfault.com/questions/414452