我最近在一个演示服务器上为Magento实例设置了Redis缓存（单独的Web服务器和DB服务器，DB服务器在运行Redis），并且它已经工作了一段时间，问题很少。唯一的问题是偶尔出现通信错误，因此为了解决这个问题，我将Redis版本从2.4.10升级到了最新的3.2.1。我还应该注意的是，从一开始我就在三个不同的端口上运行了三个不同的实例，因为这通常是当你想在Magento中使用Redis进行所有三种类型的缓存时推荐的做法。
在升级后确保我可以在所有三个端口上ping到Redis之后，我重新连接了Magento，并立即开始收到错误提示，指示它根本无法连接：Connection to Redis failed after 2 failures 。我试图排除这个问题一段时间，最终将Redis包降级回2.4.10，只是遇到了同样的问题。我之前甚至在本地环境中使用了Redis 3.2.1，没有遇到任何这些问题。我觉得我一定是错过了什么，但感觉尝试了一切。Redis日志文件完全正常，只报告成功启动。所有Magento Redis库都是最新的，从Github拉取的。 / etc / init.d / redis文件是标准文件的修改版本，从GitHub的某个地方拉取以支持启动多个实例。
Magento的local.xml：
在升级后确保我可以在所有三个端口上ping到Redis之后，我重新连接了Magento，并立即开始收到错误提示，指示它根本无法连接：Connection to Redis failed after 2 failures 。我试图排除这个问题一段时间，最终将Redis包降级回2.4.10，只是遇到了同样的问题。我之前甚至在本地环境中使用了Redis 3.2.1，没有遇到任何这些问题。我觉得我一定是错过了什么，但感觉尝试了一切。Redis日志文件完全正常，只报告成功启动。所有Magento Redis库都是最新的，从Github拉取的。 / etc / init.d / redis文件是标准文件的修改版本，从GitHub的某个地方拉取以支持启动多个实例。
Magento的local.xml：
<config>
<global>
<install>
<date><![CDATA[Sat, 11 Jul 2015 08:00:49 +0000]]></date>
</install>
<crypt>
<key><![CDATA[24d48474f523332d6dbcd9d1d6931c98]]></key>
</crypt>
<disable_local_modules>false</disable_local_modules>
<resources>
<db>
<table_prefix><![CDATA[]]></table_prefix>
</db>
<default_setup>
<connection>
<host><![CDATA[(address)]]></host>
<username><![CDATA[root]]></username>
<password><![CDATA[password]]></password>
<dbname><![CDATA[magento]]></dbname>
<initStatements><![CDATA[SET NAMES utf8]]></initStatements>
<model><![CDATA[mysql4]]></model>
<type><![CDATA[pdo_mysql]]></type>
<pdoType><![CDATA[]]></pdoType>
<active>1</active>
</connection>
</default_setup>
</resources>
<cache>
<backend>Cm_Cache_Backend_Redis</backend>
<backend_options>
<server><![CDATA[(address)]]></server> <!-- or absolute path to unix socket -->
<port><![CDATA[6379]]></port>
<persistent></persistent> <!-- Specify unique string to enable persistent connections. E.g.: sess-db0; bugs with phpredis and php-fpm are known: https://github.com/nicolasff/phpredis/issues/70 -->
<database>0</database> <!-- Redis database number; protection against accidental data loss is improved by not sharing databases -->
<password></password> <!-- Specify if your Redis server requires authentication -->
<force_standalone>0</force_standalone> <!-- 0 for phpredis, 1 for standalone PHP -->
<connect_retries>1</connect_retries> <!-- Reduces errors due to random connection failures; a value of 1 will not retry after the first failure -->
<read_timeout>10</read_timeout> <!-- Set read timeout duration; phpredis does not currently support setting read timeouts -->
<automatic_cleaning_factor>0</automatic_cleaning_factor> <!-- Disabled by default -->
<compress_data>1</compress_data> <!-- 0-9 for compression level, recommended: 0 or 1 -->
<compress_tags>1</compress_tags> <!-- 0-9 for compression level, recommended: 0 or 1 -->
<compress_threshold>20480</compress_threshold> <!-- Strings below this size will not be compressed -->
<compression_lib>gzip</compression_lib> <!-- Support gzip, lzf, lz4 (https://github.com/kjdev/php-ext-lz4) or snappy (https://github.com/goatherd/php-snappy) -->
<use_lua>0</use_lua> <!-- Set to 1 if Lua scripts should be used for some operations -->
</backend_options>
</cache>
<full_page_cache>
<backend>Cm_Cache_Backend_Redis</backend>
<backend_options>
<server><![CDATA[(address)]]></server> <!-- or absolute path to unix socket -->
<port><![CDATA[6380]]></port>
<persistent></persistent> <!-- Specify unique string to enable persistent connections. E.g.: sess-db0; bugs with phpredis and php-fpm are known: https://github.com/nicolasff/phpredis/issues/70 -->
<database>0</database> <!-- Redis database number; protection against accidental data loss is improved by not sharing databases -->
<password></password> <!-- Specify if your Redis server requires authentication -->
<force_standalone>0</force_standalone> <!-- 0 for phpredis, 1 for standalone PHP -->
<connect_retries>1</connect_retries> <!-- Reduces errors due to random connection failures -->
<read_timeout>10</read_timeout> <!-- Set read timeout duration; phpredis does not currently support setting read timeouts -->
<lifetimelimit>57600</lifetimelimit> <!-- 16 hours of lifetime for cache record -->
<compress_data>0</compress_data> <!-- DISABLE compression for EE FPC since it already uses compression -->
</backend_options>
</full_page_cache>
<session_save>db</session_save>
<redis_session> <!-- All options seen here are the defaults -->
<host><![CDATA[(address)]]></host> <!-- Specify an absolute path if using a unix socket -->
<port><![CDATA[6381)]]></port>
<password></password> <!-- Specify if your Redis server requires authentication -->
<timeout>4</timeout> <!-- This is the Redis connection timeout, not the locking timeout -->
<persistent></persistent> <!-- Specify unique string to enable persistent connections. E.g.: sess-db0; bugs with phpredis and php-fpm are known: https://github.com/nicolasff/phpredis/issues/70 -->
<db>0</db> <!-- Redis database number; protection from accidental loss is improved by using a unique DB number for sessions -->
<compression_threshold>2048</compression_threshold> <!-- Set to 0 to disable compression (recommended when suhosin.session.encrypt=on); known bug with strings over 64k: https://github.com/colinmollenhour/Cm_Cache_Backend_Redis/issues/18 -->
<compression_lib>gzip</compression_lib> <!-- gzip, lzf, lz4 (https://github.com/kjdev/php-ext-lz4) or snappy (https://github.com/goatherd/php-snappy) -->
<log_level>1</log_level> <!-- 0 (emergency: system is unusable), 4 (warning; additional information, recommended), 5 (notice: normal but significant condition), 6 (info: informational messages), 7 (debug: the most information for development/testing) -->
<max_concurrency>6</max_concurrency> <!-- maximum number of processes that can wait for a lock on one session; for large production clusters, set this to at least 10% of the number of PHP processes -->
<break_after_frontend>5</break_after_frontend> <!-- seconds to wait for a session lock in the frontend; not as critical as admin -->
<break_after_adminhtml>30</break_after_adminhtml>
<first_lifetime>600</first_lifetime> <!-- Lifetime of session for non-bots on the first write. 0 to disable -->
<bot_first_lifetime>60</bot_first_lifetime> <!-- Lifetime of session for bots on the first write. 0 to disable -->
<bot_lifetime>7200</bot_lifetime> <!-- Lifetime of session for bots on subsequent writes. 0 to disable -->
<disable_locking>0</disable_locking> <!-- Disable session locking entirely. -->
<min_lifetime>60</min_lifetime> <!-- Set the minimum session lifetime -->
<max_lifetime>2592000</max_lifetime> <!-- Set the maximum session lifetime -->
</redis_session>
</global>
<admin>
<routers>
<adminhtml>
<args>
<frontName><![CDATA[admin]]></frontName>
</args>
</adminhtml>
</routers>
</admin>
</config>
/etc/init.d/redis:
#!/bin/sh
#
# redis init file for starting up the redis daemon
#
# chkconfig: - 20 80
# description: Starts and stops the redis daemon.
# Source function library.
. /etc/rc.d/init.d/functions
name="redis-server"
exec="/usr/sbin/$name"
#shut="/usr/bin/redis-shutdown"
#pidfile="/var/run/redis/redis.pid"
#REDIS_CONFIG="/etc/redis.conf"
PORT_NUMBERS=$(grep "^port" /etc/redis.conf-* | awk '{print $NF}')
[ -e /etc/sysconfig/redis ] && . /etc/sysconfig/redis
#lockfile=/var/lock/subsys/redis
start() {
for PORT in $PORT_NUMBERS; do
REDIS_CONFIG="/etc/redis.conf-${PORT}"
pidfile="/var/run/redis/redis-${PORT}.pid"
lockfile="/var/lock/subsys/redis-${PORT}"
[ -f $REDIS_CONFIG ] || exit 6
[ -x $exec ] || exit 5
echo -n $"Starting $name on $PORT: "
daemon --user ${REDIS_USER-redis} "$exec $REDIS_CONFIG"
retval=$?
echo
[ $retval -eq 0 ] && touch $lockfile
done
return $retval
}
stop() {
for PORT in $PORT_NUMBERS; do
REDIS_CONFIG="/etc/redis.conf-${PORT}"
pidfile="/var/run/redis/redis-${PORT}.pid"
lockfile="/var/lock/subsys/redis-${PORT}"
[ -f $REDIS_CONFIG ] || exit 6
[ -x $exec ] || exit 5
echo -n $"Starting $name on $PORT: "
daemon --user ${REDIS_USER-redis} "$exec $REDIS_CONFIG"
retval=$?
echo
[ $retval -eq 0 ] && touch $lockfile
done
return $retval
}
stop() {
for PORT in $PORT_NUMBERS; do
echo -n $"Stopping $name on $PORT: "
pidfile="/var/run/redis/redis-${PORT}.pid"
lockfile="/var/lock/subsys/redis-${PORT}"
[ -x $shut ] && $shut
retval=$?
if [ -f $pidfile ]
then
# shutdown haven't work, try old way
killproc -p $pidfile $name
retval=$?
else
success "$name shutdown"
fi
echo
[ $retval -eq 0 ] && rm -f $lockfile
done
return $retval
}
restart() {
stop
start
}
reload() {
false
}
rh_status() {
for PORT in $PORT_NUMBERS; do
pidfile="/var/run/redis/redis-${PORT}.pid"
status -p $pidfile $name
done
}
rh_status_q() {
rh_status >/dev/null 2>&1
}
case "$1" in
start)
rh_status_q && exit 0
$1
;;
stop)
rh_status_q || exit 0
$1
;;
restart)
$1
;;
reload)
rh_status_q || exit 7
$1
;;
force-reload)
force_reload
;;
status)
rh_status
;;
condrestart|try-restart)
rh_status_q || exit 0
restart
;;
*)
echo $"Usage: $0 {start|stop|status|restart|condrestart|try-restart}"
exit 2
esac
exit $?
如果您有其他想法，我们非常感谢。