'queue' => [
            'class' => \yii\queue\redis\Queue::class,
            'redis' => 'redis', // Redis connection component or its config
            'channel' => 'queue', // Queue channel key
        ],
'redis' => [
            'class' => 'yii\redis\Connection',
            'hostname' => '78.xx.xx.xx',
            'port' => 6379,
            'database' => 0,
            'password' => 'PASSWORD',
        ],

Exception 'yii\db\Exception' with message 'Failed to open redis DB connection (tcp://127.0.0.1:6379, database=0): 111 - Connection refused'

in /var/www/html/vendor/yiisoft/yii2-redis/src/Connection.php:609

Error Info:
Connection refused
Stack trace:
#0 /var/www/html/vendor/yiisoft/yii2-redis/src/Connection.php(710): yii\redis\Connection->open()
#1 /var/www/html/vendor/yiisoft/yii2-redis/src/Connection.php(675): yii\redis\Connection->executeCommand('LLEN', Array)
#2 /var/www/html/vendor/yiisoft/yii2-queue/src/drivers/redis/InfoAction.php(32): yii\redis\Connection->__call('llen', Array)
#3 /var/www/html/vendor/yiisoft/yii2-queue/src/drivers/redis/InfoAction.php(32): yii\redis\Connection->llen('queue.waiting')
#4 [internal function]: yii\queue\redis\InfoAction->run()
#5 /var/www/html/vendor/yiisoft/yii2/base/Action.php(94): call_user_func_array(Array, Array)
#6 /var/www/html/vendor/yiisoft/yii2/base/Controller.php(157): yii\base\Action->runWithParams(Array)
#7 /var/www/html/vendor/yiisoft/yii2/console/Controller.php(164): yii\base\Controller->runAction('info', Array)
#8 /var/www/html/vendor/yiisoft/yii2/base/Module.php(528): yii\console\Controller->runAction('info', Array)
#9 /var/www/html/vendor/yiisoft/yii2/console/Application.php(180): yii\base\Module->runAction('queue/info', Array)
#10 /var/www/html/vendor/yiisoft/yii2/console/Application.php(147): yii\console\Application->runAction('queue/info', Array)
#11 /var/www/html/vendor/yiisoft/yii2/base/Application.php(386): yii\console\Application->handleRequest(Object(yii\console\Request))
#12 /var/www/html/yii(20): yii\base\Application->run()
#13 {main}