Amazon ElastiCache Cluster Client is used to connect to ElastiCache for Memcached clusters. This client supports auto-discovery capabilities which allow you to easily manage your Memcached cluster configuration. This extension uses Amazon ElastiCache fork of libmemcached library to provide API for communicating with ElastiCache servers. Our changes are based on open-source memcached extension v.2.1.0 from https://github.com/php-memcached-dev/php-memcached. This code branch is compatible with PHP 7.0 - 8.1. Other PHP versions (including PHP 5.x) are not supported.

This client library is released under the Apache 2.0 License.

a) Launch a new instance from the AMI

b) Run the following commands

sudo apt-get update

sudo apt-get install gcc g++ make zlib1g zlib1g-dev

c) Install PHP between versions 7.0 and 8.1

Installation instructions for PHP 8.1:

sudo apt install php8.1-cli php8.1-dev

Installation instructions for PHP 7.4:

sudo apt -y install software-properties-common

sudo add-apt-repository ppa:ondrej/php

sudo apt-get update

sudo apt -y install php7.4

d) Download and unzip Amazon ElastiCache Cluster Client from AWS ElastiCache Management Console.

e) With root permission, copy the extracted artifact file amazon-elasticache-cluster-client.so into the php extension directory /usr/lib/php/20190902. In case this extension dir does not exist, you can find it by running:

php -i | grep extension_dir

f) Insert the line "extension=amazon-elasticache-cluster-client.so" into file /etc/php/7.4/cli/php.ini (change "7.4" to the PHP version you have)

g) If you downloaded ElastiCache Cluster Client with PHP 7.4, install OpenSSL 1.1.x.

wget https://www.openssl.org/source/openssl-1.1.1c.tar.gz

tar xvf openssl-1.1.1c.tar.gz

cd openssl-1.1.1c

./config -Wl,--enable-new-dtags,-rpath,'$(LIBRPATH)'

make

sudo make install

sudo ln -s /usr/local/lib/libssl.so.1.1 /usr/lib/x86_64-linux-gnu/libssl.so.1.1

a) Launch a new instance from the AMI

b) Run the following command

sudo yum install gcc-c++ zlib-devel

c) Install PHP between versions 7.0 and 8.1 Installation instruction using amazon-linux-extras to install php7.4:

which amazon-linux-extras

If not installed, use following command to install

sudo yum install -y amazon-linux-extras

confirm that PHP 7.x topic is available in our Amazon Linux 2 machine

sudo amazon-linux-extras | grep php

As we can see all PHP 7 topics, in this example we’ll enable php7.4 topic.

sudo amazon-linux-extras enable php7.4

Now install PHP packages from the repository.

sudo yum clean metadata

sudo yum install php php-{pear,cgi,common,curl,mbstring,gd,mysqlnd,gettext,bcmath,json,xml,fpm,intl,zip,imap

d) Download and unzip Amazon ElastiCache Cluster Client from AWS ElastiCache Management Console

e) With root permission, copy the extracted artifact file amazon-elasticache-cluster-client.so into /usr/lib64/php/modules/

f) Insert the line "extension=amazon-elasticache-cluster-client.so" into file /etc/php.ini

g) If you downloaded ElastiCache Cluster Client with PHP 7.4 or higher, install OpenSSL 1.1.x or higher. Installation instructions for OpenSSL 1.1.1:

sudo yum -y update

sudo yum install -y make gcc perl-core pcre-devel wget zlib-devel

wget https://www.openssl.org/source/openssl-1.1.1c.tar.gz

tar xvf openssl-1.1.1c.tar.gz

cd openssl-1.1.1c

./config -Wl,--enable-new-dtags,-rpath,'$(LIBRPATH)'

make

sudo make install

sudo ln -s /usr/local/lib64/libssl.so.1.1 /usr/lib64/libssl.so.1.1

a) Launch a new instance from the AMI

b) Run the following command

sudo zypper refresh

sudo zypper update -y

sudo zypper install gcc

c) Install PHP between versions 7.0 and 8.1 Installation instructions for php 7.x:

sudo zypper addrepo http://download.opensuse.org/repositories/devel:/languages:/php/openSUSE_Leap_15.3/ php

sudo zypper install php7

d) Download and unzip Amazon ElastiCache Cluster Client from AWS ElastiCache Management Console

e) With root permission, copy the extracted artifact file amazon-elasticache-cluster-client.so into /usr/lib64/php7/extensions/

f) Insert the line "extension=amazon-elasticache-cluster-client.so" into file /etc/php7/cli/php.ini

• OpenSSL >= 1.1.0 (unless TLS support is disabled by ./configure --disable-tls).
• SASL (libsasl2, unless SASL support is disabled by ./configure --disable-sasl).

a) Launch a Linux-based EC2 instance and Install PHP between versions 7.0 and 8.1 along with its required dependencies.

b) Checkout and compile the dependency package aws-elasticache-cluster-client-libmemcached via https://github.com/awslabs/aws-elasticache-cluster-client-libmemcached

c) Run the following set of commands under the current directory:

phpize

mkdir BUILD

cd BUILD

../configure --with-libmemcached-dir=<path to libmemcached build directory> --disable-memcached-sasl

If running ../configure fails to find libssl (OpenSSL library) it may be necessary to tweak the PKG_CONFIG_PATH environment variable:

PKG_CONFIG_PATH=/path/to/ssl/lib/pkgconfig ../configure --with-libmemcached-dir=<path to libmemcached build directory> --disable-memcached-sasl

Alternately, if you are not using TLS, you can disable it by running:

../configure --with-libmemcached-dir=<path to libmemcached build directory> --disable-memcached-sasl --disable-memcached-tls

Note: If you want to enable igbinary support, checkout, compile, and install the upstream igbinary7 package https://github.com/igbinary/igbinary7, and append the option "--enable-memcached-igbinary" at the end of the "configure" command above.

make

make install

Note: you can statically link the libmemcached library into the PHP binary so it can be ported across various Linux platforms. To do that, run the following command before "make":

sed -i "s#-lmemcached#/lib/libmemcached.a -lcrypt -lpthread -lm -lstdc++ -lsasl2#" Makefile

sed -i "s#-lmemcachedutil#/lib/libmemcachedutil.a#" Makefile

• [Github link] (https://github.com/awslabs/aws-elasticache-cluster-client-memcached-for-php)
• AmazonElastiCache Auto Discovery
• [php-memcached] (https://github.com/php-memcached-dev/php-memcached)
• How do I install a software package from the Extras Library on an EC2 instance running Amazon Linux 2?

php-memcached 3.x:

• Supports PHP 7.0 - 8.1.
• Requires libmemcached 1.x or higher.
• Optionally supports igbinary 2.0 or higher.
• Optionally supports msgpack 2.0 or higher.

php-memcached 2.x:

• Supports PHP 5.2 - 5.6.
• Requires libmemcached 0.44 or higher.
• Optionally supports igbinary 1.0 or higher.
• Optionally supports msgpack 0.5 or higher.

libmemcached version 1.0.18 or higher is recommended for best performance and compatibility with memcached servers.

igbinary is a faster and more compact binary serializer for PHP data structures. When installing php-memcached from source code, the igbinary module must be installed first so that php-memcached can access its C header files. Load both modules in your php.ini at runtime to begin using igbinary.

msgpack is a faster and more compact data structure representation that is interoperable with msgpack implementations for other languages. When installing php-memcached from source code, the msgpack module must be installed first so that php-memcached can access its C header files. Load both modules in your php.ini at runtime to begin using msgpack.