Instalación de una réplica de un website en un servidor XAMPP

Una de los principales problemas que tenemos para dar mantenimiento a una web es la implementación de un servidor de pruebas que replique las mismas condiciones del servidor en producción. Me refiero que a pesar de que PHP tenga ya lanzada una versión superior a la que usa el servidor en producción no queda más remedio que implementar un ambiente que use la misma versión de PHP que usa el servidor en producción. Lo mismo pasa con el MySQL y a veces con el Apache.

Hace unas semanas me tocó lidiar con la implementación de un servidor de pruebas que usara PHP 5.2.9 y bases de datos MySQL de tipo INNODB. Intenté hacer un downgrade a la versión de PHP que uso en mi UBUNTU server pero ya me estaba tomando demasiado tiempo así que decidí usar XAMPP, un paquete que trae por defecto todo listo para usar. Sólo tenía que buscar en la lista de 'releases' la versión de XAMPP que trabaje con la versión de PHP que deseaba (5.2.9).

http://www.apachefriends.org/LAMPP-RELEASENOTES.txt

Una vez ubicada no queda más que descargarla a /opt

y luego poner en marcha el servidor XAMPP usando /opt/lampp/lampp

Sugiero para evitar problemas se use el comando sudo y no se le cambie de dueño (el dueño por defecto es root).

El siguiente problema fue la carga del sql de la base de datos (250 MB). Normalmente se usa phpMyAdmin o bigdump pero con ese tamaño es mejor cargarlo directamente por consola. Los pasos son

1. Loguearse con el usuario de la base de datos
2. Luego tipear los siguientes comandos en la consola del mysql
$ use mi_base_de_datos
source /path/to/my/file/sql_file.sql

Eso es todo, MySQL cargará rápidamente la data.

El siguiente problema fue afinar la configuración del my.cnf (archivo de configuración del MySQL) debido a que mi sitio web funcionaba muy lento.

Al final tuve que modificar un poco el my.cnf que me quedó así.

<code>

# Example MySQL config file for medium systems.
#
# This is for a system with little memory (32M - 64M) where MySQL plays
# an important part, or systems up to 128M where MySQL is used together with
# other programs (such as a web server)
#
# You can copy this file to
# /etc/my.cnf to set global options,
# mysql-data-dir/my.cnf to set server-specific options (in this
# installation this directory is /opt/lampp/var/mysql) or
# ~/.my.cnf to set user-specific options.
#
# In this file, you can use all long options that a program supports.
# If you want to know which options a program supports, run the program
# with the "--help" option.

# The following options will be passed to all MySQL clients
[client]
#password = your_password
port = 3306
socket = /opt/lampp/var/mysql/mysql.sock

# Here follows entries for some specific programs

# The MySQL server
[mysqld]
port = 3306
socket = /opt/lampp/var/mysql/mysql.sock
skip-locking
key_buffer = 16M
max_allowed_packet = 16M
table_cache = 64
sort_buffer_size = 512K
net_buffer_length = 8K
read_buffer_size = 256K
read_rnd_buffer_size = 512K
myisam_sort_buffer_size = 8M

# Where do all the plugins live
plugin_dir = /opt/lampp/lib/mysql/plugin/

# Don't listen on a TCP/IP port at all. This can be a security enhancement,
# if all processes that need to connect to mysqld run on the same host.
# All interaction with mysqld must be made via Unix sockets or named pipes.
# Note that using this option without enabling named pipes on Windows
# (via the "enable-named-pipe" option) will render mysqld useless!
#
#skip-networking

# Replication Master Server (default)
# binary logging is required for replication
# log-bin deactivated by default since XAMPP 1.4.11
#log-bin=mysql-bin

# required unique id between 1 and 2^32 - 1
# defaults to 1 if master-host is not set
# but will not function as a master if omitted
server-id = 1

# Replication Slave (comment out master section to use this)
#
# To configure this host as a replication slave, you can choose between
# two methods :
#
# 1) Use the CHANGE MASTER TO command (fully described in our manual) -
# the syntax is:
#
# CHANGE MASTER TO MASTER_HOST=<host>, MASTER_PORT=<port>,
# MASTER_USER=<user>, MASTER_PASSWORD=<password> ;
#
# where you replace <host>, <user>, <password> by quoted strings and
# <port> by the master's port number (3306 by default).
#
# Example:
#
# CHANGE MASTER TO MASTER_HOST='125.564.12.1', MASTER_PORT=3306,
# MASTER_USER='joe', MASTER_PASSWORD='secret';
#
# OR
#
# 2) Set the variables below. However, in case you choose this method, then
# start replication for the first time (even unsuccessfully, for example
# if you mistyped the password in master-password and the slave fails to
# connect), the slave will create a master.info file, and any later
# change in this file to the variables' values below will be ignored and
# overridden by the content of the master.info file, unless you shutdown
# the slave server, delete master.info and restart the slaver server.
# For that reason, you may want to leave the lines below untouched
# (commented) and instead use CHANGE MASTER TO (see above)
#
# required unique id between 2 and 2^32 - 1
# (and different from the master)
# defaults to 2 if master-host is set
# but will not function as a slave if omitted
#server-id = 2
#
# The replication master for this slave - required
#master-host = <hostname>
#
# The username the slave will use for authentication when connecting
# to the master - required
#master-user = <username>
#
# The password the slave will authenticate with when connecting to
# the master - required
#master-password = <password>
#
# The port the master is listening on.
# optional - defaults to 3306
#master-port = <port>
#
# binary logging - not required for slaves, but recommended
#log-bin=mysql-bin

# Point the following paths to different dedicated disks
#tmpdir = /tmp/
#log-update = /path-to-dedicated-directory/hostname

# Uncomment the following if you are using BDB tables
#bdb_cache_size = 4M
#bdb_max_lock = 10000

# Comment the following if you are using InnoDB tables
#skip-innodb
innodb_data_home_dir = /opt/lampp/var/mysql/
innodb_data_file_path = ibdata1:10M:autoextend
innodb_log_group_home_dir = /opt/lampp/var/mysql/
# You can set .._buffer_pool_size up to 50 - 80 %
# of RAM but beware of setting memory usage too high
innodb_buffer_pool_size = 1G
innodb_additional_mem_pool_size = 2M
# Set .._log_file_size to 25 % of buffer pool size
innodb_log_file_size = 250M
innodb_log_buffer_size = 8M
innodb_flush_log_at_trx_commit = 1
innodb_lock_wait_timeout = 50

[mysqldump]
quick
max_allowed_packet = 16M

[mysql]
no-auto-rehash
# Remove the next comment character if you are not familiar with SQL
#safe-updates

[isamchk]
key_buffer = 20M
sort_buffer_size = 20M
read_buffer = 2M
write_buffer = 2M

[myisamchk]
key_buffer = 20M
sort_buffer_size = 20M
read_buffer = 2M
write_buffer = 2M

[mysqlhotcopy]
interactive-timeout

</code>

En particular sólo cambié las dos líneas siguientes del archivo anterior

innodb_buffer_pool_size = 1G
innodb_log_file_size = 250M

Espero le sirva a alguien

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