Predis 与 laravel 5.5“Aggregate/RedisCluster.php:337 池中没有可用的连接”

Question

我已使用 Laravel 5.5 和 Predis 包在 Amazon ElastiCache 上设置 redis-cluster 进行缓存，但出现以下错误。

Predis\ClientException: No connections available in the pool in vendor/predis/predis/src/Connection/Aggregate/RedisCluster.php:337 

跟踪：Predis\ClientException：vendor/predis/predis/src/Connection/Aggregate/RedisCluster.php:337 中的池中没有可用的连接

堆栈跟踪：

0 供应商/predis/predis/src/Connection/Aggregate/RedisCluster.php(411): Predis\Connection\Aggregate\RedisCluster->guessNode(153)

1供应商/predis/predis/src/Connection/Aggregate/RedisCluster.php(388)：Predis\Connection\Aggregate\RedisCluster->getConnectionBySlot(153)

2供应商/predis/predis/src/Connection/Aggregate/RedisCluster.php(550)：Predis\Connection\Aggregate\RedisCluster->getConnection(对象(Predis\Command\StringSetExpire))

3 供应商/predis/predis/src/Connection/Aggregate/RedisCluster.php(593): Predis\Connection\Aggregate\RedisCluster->retryCommandOnFailure(Object(Predis\Command\StringSetExpire), 'executeCommand')

4 供应商/predis/predis/src/Client.php(331): Predis\Connection\Aggregate\RedisCluster->executeCommand(对象(Predis\Command\StringSetExpire))

5 供应商/predis/predis/src/Client.php(314): Predis\Client->executeCommand(对象(Predis\Command\StringSetExpire))

6 供应商/laravel/framework/src/Illuminate/Redis/Connections/Connection.php(96): Predis\Client->__call('setex', Array)

7vendor/laravel/framework/src/Illuminate/Redis/Connections/Connection.php(108): Illuminate\Redis\Connections\Connection->command('setex', Array)

8vendor/laravel/framework/src/Illuminate/Cache/RedisStore.php(93): Illuminate\Redis\Connections\Connection->__call('setex', Array)

9vendor/laravel/framework/src/Illuminate/Cache/Repository.php(195): Illuminate\Cache\RedisStore->put('5rr44TBjIPEgJSx...', 'a:1:{s:6:"_flas.. .', 480)

10vendor/laravel/framework/src/Illuminate/Session/CacheBasedSessionHandler.php(66): Illuminate\Cache\Repository->put('5rr44TBjIPEgJSx...', 'a:1:{s:6:"_flas.. .', 480)

11vendor/laravel/framework/src/Illuminate/Session/Store.php(128): Illuminate\Session\CacheBasedSessionHandler->write('5rr44TBjIPEgJSx...', 'a:1:{s:6:"_flas.. .')

12vendor/laravel/framework/src/Illuminate/Session/Middleware/StartSession.php(87): Illuminate\Session\Store->save()

13vendor/laravel/framework/src/Illuminate/Foundation/Http/Kernel.php(218): Illuminate\Session\Middleware\StartSession->terminate(Object(Illuminate\Http\Request), Object(Illuminate\Http\Response) ）

14vendor/laravel/framework/src/Illuminate/Foundation/Http/Kernel.php(189): Illuminate\Foundation\Http\Kernel->terminateMiddleware(对象(Illuminate\Http\Request), 对象(Illuminate\Http\Response) ）

15 public/index.php(58): Illuminate\Foundation\Http\Kernel->terminate(Object(Illuminate\Http\Request), Object(Illuminate\Http\Response))

16 {主要}

我使用的技术栈：

• PHP7.0
• Laravel5.5
• 操作系统（Debian GNU/Linux 9.6（延伸）），版本 9.6

我在 config/database.php 中尝试了以下配置：

redis=> [
'client'  => 'predis',
        'options' => [
            'cluster' => 'redis',
        ],
        'clusters' => [
            'default' => [
                [
                    'host' => env('REDIS_CLUSTER_HOST', 'localhost'),
                    'password' => env('REDIS_CLUSTER_PASSWORD', null),
                    'port' => env('REDIS_CLUSTER_PORT', 6379),
                    'database' => 0,
                ],
            ],
            'cache' => [
                [
                    'host' => env('REDIS_CLUSTER_HOST', 'localhost'),
                    'password' => env('REDIS_CLUSTER_PASSWORD', null),
                    'port' => env('REDIS_CLUSTER_PORT', 6379),
                    'database' => 0,
                ],
            ],
        ]
]

我也尝试过 timeout => 0|5|60 但每次我都会遇到同样的错误。

任何帮助将不胜感激！

Answer 1

这在我们的环境中工作：

    'redis' => [
         'cluster' => true,

         'client' => 'predis',

         'options' => [
             'cluster' => 'redis',
             'parameters' => [
                 'scheme'   => env('REDIS_SCHEME', 'tcp'),
                 'host'     => env('REDIS_HOST', 'localhost'),
                 'password' => env('REDIS_PASSWORD', null),
                 'port'     => env('REDIS_PORT', 6379),
                 'database' => 0,
                 'timeout' => 15,
              ],
         ],

         'clusters' => [

             'default' => [
                 'scheme'   => env('REDIS_SCHEME', 'tcp'),
                 'host'     => env('REDIS_HOST', 'localhost'),
                 'password' => env('REDIS_PASSWORD', null),
                 'port'     => env('REDIS_PORT', 6379),
                 'database' => 0,
                 'timeout' => 15,
             ],
         ],
     ],

基于此处找到的信息： https: //github.com/nrk/predis/issues/480 - 但还需要复制选项 -> 参数组中的所有“默认”配置值

REDIS_HOST，指向AWS elasticache的redis集群中的配置端点。