Yii2.0日志问题，超过5个文件并且文件超过maxFileSize的设置，日志记录消失 [ 技术分享 ]

日志配置，按照小时来划分配置，默认的maxFileSize=10240 （kb）

'components' => [
    'log' => [
        'traceLevel' => YII_DEBUG ? 3 : 0,
        'targets' => [
            [
                'class' => 'yii\log\FileTarget',
                'logFile' => "@runtime/logs/" . date('YmdH', time()) . ".log",
                'logVars' => [],
                'levels' => ['error', 'warning','info'],
            ],
        ],
    ],
],

单个小时内文件的列表,后面有标记的都满10M了

-rw-rw-r-- 1 www-data www-data  11M Jun 24 10:00 /data/www/project/console/runtime/logs/2017062409.log.1
-rw-rw-r-- 1 www-data www-data  11M Jun 24 10:00 /data/www/project/console/runtime/logs/2017062409.log.2
-rw-rw-r-- 1 www-data www-data  11M Jun 24 10:00 /data/www/project/console/runtime/logs/2017062409.log.3
-rw-rw-r-- 1 www-data www-data  11M Jun 24 10:00 /data/www/project/console/runtime/logs/2017062409.log.4
-rw-rw-r-- 1 www-data www-data  11M Jun 24 10:00 /data/www/project/console/runtime/logs/2017062409.log.5
-rw-rw-r-- 1 www-data www-data 2.0M Jun 24 10:09 /data/www/project/console/runtime/logs/2017062410.log

然后查看了下日志，9点半之前的日志全部丢失了