Cachify with Elasticache

Hi,

Whenever I configure it with the cluster endpoint URL / PORT it seems like its not sending items to the Memcached cluster.

Just to be sure, you’re doing something like this, right?

apply_filter( 'cachify_memcached_servers', fn () => [ [ '*****.cache.amazonaws.com', 11211 ] ] );
(or equivalent older PHP notation)

Note the nested array, because the result is passed to addServers().

I have confirmed that I am able to access elasticache from the EC2 via telnet

Have you checked via PHP? E.g. with such simple roundtrip script using the same settings and methods Cachify uses (just hacked down, might contain typos)

<?php
echo "initialize memcached";
$memcached = new Memcached();
if ( ! $memcached ) die(" FAILED");

echo " ✓\nconfigure memcached";
$res =$memcached->setOptions( array( Memcached::OPT_COMPRESSION  => false, Memcached::OPT_BUFFER_WRITES => true, Memcached::OPT_BINARY_PROTOCOL => true ) );
if ( ! $res ) die(" FAILED");

echo " ✓\nadd servers";
$res =$memcached->addServers( array( array( '*****.cache.amazonaws.com', 11211) ) );
if ( ! $res ) die(" FAILED");

echo " ✓\nwrite test object";
$res = $memcached->set( 'testkey', 'testvalue', 60 );
if ( ! $res ) die(" FAILED");

echo " ✓\nread test object";
$res = $memcached->get( 'testkey' );

if ( 'testvalue' !== $res ) {
    echo " FAILED\n";
    print_r( $res );
    exit(1);
}

echo " ✓\ndelete test object";
$res = $memcached->delete( 'testkey' );
if ( ! $res ) die(" FAILED");
echo " ✓";

If this didn’t do the job yet… Are you using the distribution’s or PECL extension for Memcached or the ElastiCache extension?
Cachify always calls addServers() with [['127.0.0.1', 11211]] by default which might interfere with the autodiscovery feature. I haven’t tried yet, but you could try an empty argument in this case:
apply_filter( 'cachify_memcached_servers', fn () => [] );

Cheers,
Stefan