Redis installation test script

redis-glue-test.php

<?php
define('TEST_KEY', 'are_we_glued');
$redis = new Redis();
try {
    $redis->connect('localhost', 6379);
    $redis->set(TEST_KEY, 'yes');
    $glueStatus = $redis->get(TEST_KEY);
    if ($glueStatus) {
        $testKey = TEST_KEY;
        echo "Glued with the Redis key value store:" . PHP_EOL;
        echo "1. Got value '{$glueStatus}' for key '{$testKey}'." . PHP_EOL;
        if ($redis->delete(TEST_KEY)) {
            echo "2. And already removed the key/value pair again." . PHP_EOL;
        }
    } else {
        echo "Not glued with the Redis key value store." . PHP_EOL;
    }
} catch (RedisException $e) {
    $exceptionMessage = $e->getMessage();
    echo "{$exceptionMessage}. Not glued with the Redis key value store." . PHP_EOL;
}

Complete Command Sequence

Here is the complete sequence of commands to run inside your running PHP container to install the Redis extension and restart PHP-FPM:

Install necessary dependencies and the Redis extension:

bash

**apt-get update && apt-get install -y \ libcurl4-openssl-dev \ pkg-config \ libssl-dev \ libz-dev \ wget \ gnupg**

**pecl install redis**

echo "extension=redis.so" > /usr/local/etc/php/conf.d/redis.ini

Restart PHP-FPM using pkill:

bash

**pkill -o -USR2 php-fpm**

Verify the Redis extension is enabled:

bash

**php -m | grep redis**

Explanation

Installing dependencies and the Redis extension: These commands ensure that all necessary packages are installed and the Redis extension is added via PECL.
Enabling the Redis extension: This command creates a configuration file that tells PHP to load the Redis extension.
Restarting PHP-FPM using pkill: The pkill -o -USR2 php-fpm command sends a signal to the PHP-FPM process to reload its configuration and restart gracefully.

This method ensures that the Redis extension is installed and enabled in your PHP-FPM container without relying on the service or systemctl commands.

docker exec -it php-container bash
service redis-server status