Install Memcache onto cPanel running CentOS
Every time I install Memcache on cPanel I get a little bit stuck, so I wrote this quick guide in the hopes of helping myself next time and also helping other people who want the advantages of super fast caching.
Make the Sources Folder
First of all lets make a folder to put all our sources in
mkdir ~/memcache
Compile and Install LibEvent
Memcache requires LibEvent. Go to their site and get the latest version.
cd ~/memcache
wget http://www.monkey.org/~provos/libevent-1.4.9-stable.tar.gz
tar xvfz libevent-1.4.9-stable.tar.gz
cd libevent-1.4.9-stable
./configure; make; make install
Compile and Install Memcache
Now you can install Memcache. Again you should check their site for the latest version.
cd ~/memcache
wget http://www.danga.com/memcached/dist/memcached-1.2.6.tar.gz
tar xvfz memcached-1.2.6.tar.gz
cd memcached-1.2.6
./configure --with-lib-event=/usr/local/; make; make install
Starting Memcache
Try starting memcache.
memcached
If you get the following error then you may beed to register libevent: error while loading shared libraries: libevent-1.4.so.2: cannot open shared object file: No such file or directory then Register LibEvent
vi /etc/ld.so.conf.d/libevent-i386.conf
--[paste]--
/usr/local/lib/
--[/paste]--
ldconfig
Installing PHP Memcache
Install the PHP Memcache extension. Check their site for the latest version.
cd ~/memcache
wget http://pecl.php.net/get/memcache-3.0.3.tgz
tar xvfz memcache-3.0.3.tgz
cd memcache-3.0.3
phpize
./configure
make
make install
vi /usr/local/lib/php.ini
--[paste]--
extension=memcache.so
--[/paste]--
service httpd restart
Daemon scripts for memcached
Information taken from hxxp://www.vbseo.com/blogs/danny-bembibre/daemon-scripts-memcached-44/.
Create the configuration file
touch /etc/memcached.conf
And put in:
# Memory
-m 5120
# default port
-p 11211
# user to run daemon nobody/apache/www-data
-u nobody
# only listen locally
-l 127.0.0.1
Create the startups files
touch /etc/init.d/memcached
chmod +x /etc/init.d/memcached
Edit with your favorite editor and paste this code
#!/bin/bash
#
# memcached This shell script takes care of starting and stopping
# standalone memcached.
#
# chkconfig: - 80 12
# description: memcached is a high-performance, distributed memory
# object caching system, generic in nature, but
# intended for use in speeding up dynamic web
# applications by alleviating database load.
# processname: memcached
# config: /etc/memcached.conf
# Source function library.
. /etc/rc.d/init.d/functions
PATH=/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin
DAEMON=/usr/local/bin/memcached
DAEMONBOOTSTRAP=/usr/local/bin/start-memcached
DAEMONCONF=/etc/memcached.conf
NAME=memcached
DESC=memcached
PIDFILE=/var/run/$NAME.pid
[ -x $DAEMON ] || exit 0
[ -x $DAEMONBOOTSTRAP ] || exit 0
RETVAL=0
start() {
echo -n $"Starting $DESC: "
daemon $DAEMONBOOTSTRAP $DAEMONCONF
RETVAL=$?
[ $RETVAL -eq 0 ] && touch $PIDFILE
echo
return $RETVAL
}
stop() {
echo -n $"Shutting down $DESC: "
killproc $NAME
RETVAL=$?
echo
[ $RETVAL -eq 0 ] && rm -f $PIDFILE
return $RETVAL
}
# See how we were called.
case "$1" in
start)
start
;;
stop)
stop
;;
restart|reload)
stop
start
RETVAL=$?
;;
status)
status $prog
RETVAL=$?
;;
*)
echo $"Usage: $0 {start|stop|restart|status}"
exit 1
esac
exit $RETVAL
touch /usr/local/bin/start-memcached
chmod +x /usr/local/bin/start-memcached
Edit with your favorite editor and paste this code
#!/usr/bin/perl -w
# start-memcached
# 2003/2004 - Jay Bonci <[email protected]>
# This script handles the parsing of the /etc/memcached.conf file
# and was originally created for the Debian distribution.
# Anyone may use this little script under the same terms as
# memcached itself.
use strict;
if ($> != 0 and $< != 0) {
print STDERR "Only root wants to run start-memcached.\n";
exit;
}
my $etcfile = shift || "/etc/memcached.conf";
my $params = [];
my $etchandle;
# This script assumes that memcached is located at /usr/bin/memcached, and
# that the pidfile is writable at /var/run/memcached.pid
my $memcached = "/usr/local/bin/memcached";
my $pidfile = "/var/run/memcached.pid";
# If we don't get a valid logfile parameter in the /etc/memcached.conf file,
# we'll just throw away all of our in-daemon output. We need to re-tie it so
# that non-bash shells will not hang on logout. Thanks to Michael Renner for
# the tip
my $fd_reopened = "/dev/null";
sub handle_logfile {
my ($logfile) = @_;
$fd_reopened = $logfile;
}
sub reopen_logfile {
my ($logfile) = @_;
open *STDERR, ">>$logfile";
open *STDOUT, ">>$logfile";
open *STDIN, ">>/dev/null";
$fd_reopened = $logfile;
}
# This is set up in place here to support other non -[a-z] directives
my $conf_directives = {
"logfile" => \&handle_logfile
};
if (open $etchandle, $etcfile) {
foreach my $line (<$etchandle>) {
$line =~ s/\#.*//go;
$line = join ' ', split ' ', $line;
next unless $line;
next if $line =~ /^\-[dh]/o;
if ($line =~ /^[^\-]/o) {
my ($directive, $arg) = $line =~ /^(.*?)\s+(.*)/;
$conf_directives->{$directive}->($arg);
next;
}
push @$params, $line;
}
}
unshift @$params, "-u root" unless (grep $_ eq '-u', @$params);
$params = join " ", @$params;
if (-e $pidfile) {
open PIDHANDLE, "$pidfile";
my $localpid = <PIDHANDLE>;
close PIDHANDLE;
chomp $localpid;
if (-d "/proc/$localpid") {
print STDERR "memcached is already running.\n";
exit;
} else {
`rm -f $localpid`;
}
}
my $pid = fork();
if ($pid == 0) {
reopen_logfile($fd_reopened);
exec "$memcached $params";
exit(0);
} elsif (open PIDHANDLE,">$pidfile") {
print PIDHANDLE $pid;
close PIDHANDLE;
} else {
print STDERR "Can't write pidfile to $pidfile.\n";
}
Test the scripts
[root@srv01 init.d]# /etc/init.d/memcached restart
Shutting down memcached: [ OK ]
Starting memcached: [ OK ]
Review if the conf file is well parsed
[root@srv01 init.d]# ps aux | grep memcached
nobody 5966 0.5 0.3 18248 16444 pts/0 S 13:55 0:00 /usr/local/bin/memcached -u root -m 16 -p 11211 -u nobody -l 127.0.0.1
Add memcached as autostart daemon
[root@srv01 init.d]# /sbin/chkconfig memcached on
[root@srv01 init.d]# /sbin/chkconfig --list | grep memcached
memcached 0:off 1:off 2:on 3:on 4:on 5:on 6:off
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