PDOException: SQLSTATE[HY000] [2002] No such file or directory in /var/www/html/vendor/magento/zendframework1/library/Zend/Db/Adapter/Pdo/Abstract.php:128
Stack trace:
#0 /var/www/html/vendor/magento/zendframework1/library/Zend/Db/Adapter/Pdo/Abstract.php(128): PDO->__construct('mysql:host=loca...', 'root', 'sqlroot2017', Array)
#1 /var/www/html/vendor/magento/zendframework1/library/Zend/Db/Adapter/Pdo/Mysql.php(111): Zend_Db_Adapter_Pdo_Abstract->_connect()
#2 /var/www/html/vendor/magento/framework/DB/Adapter/Pdo/Mysql.php(353): Zend_Db_Adapter_Pdo_Mysql->_connect()
#3 /var/www/html/vendor/magento/zendframework1/library/Zend/Db/Adapter/Abstract.php(460): Magento\Framework\DB\Adapter\Pdo\Mysql->_connect()
#4 /var/www/html/vendor/magento/zendframework1/library/Zend/Db/Adapter/Pdo/Abstract.php(238): Zend_Db_Adapter_Abstract->query('SELECT `main_ta...', Array)
#5 /var/www/html/vendor/magento/framework/DB/Adapter/Pdo/Mysql.php(465): Zend_Db_Adapter_Pdo_Abstract->query('SELECT `main_ta...', Array)
#6 /var/www/html/vendor/magento/framework/DB/Adapter/Pdo/Mysql.php(520): Magento\Framework\DB\Adapter\Pdo\Mysql->_query('SELECT `main_ta...', Array)
#7 /var/www/html/vendor/magento/zendframework1/library/Zend/Db/Adapter/Abstract.php(737): Magento\Framework\DB\Adapter\Pdo\Mysql->query(Object(Magento\Framework\DB\Select), Array)
#8 /var/www/html/vendor/magento/framework/Data/Collection/Db/FetchStrategy/Query.php(21): Zend_Db_Adapter_Abstract->fetchAll(Object(Magento\Framework\DB\Select), Array)
#9 /var/www/html/vendor/magento/framework/Data/Collection/AbstractDb.php(772): Magento\Framework\Data\Collection\Db\FetchStrategy\Query->fetchAll(Object(Magento\Framework\DB\Select), Array)
#10 /var/www/html/vendor/magento/framework/Data/Collection/AbstractDb.php(668): Magento\Framework\Data\Collection\AbstractDb->_fetchAll(Object(Magento\Framework\DB\Select))
#11 /var/www/html/vendor/magento/framework/Data/Collection/AbstractDb.php(572): Magento\Framework\Data\Collection\AbstractDb->getData()
#12 /var/www/html/vendor/magento/framework/Data/Collection/AbstractDb.php(557): Magento\Framework\Data\Collection\AbstractDb->loadWithFilter(false, false)
#13 /var/www/html/vendor/magento/framework/Data/Collection.php(820): Magento\Framework\Data\Collection\AbstractDb->load()
#14 /var/www/html/vendor/magento/module-config/App/Config/Source/RuntimeConfigSource.php(78): Magento\Framework\Data\Collection->getIterator()
#15 /var/www/html/vendor/magento/module-config/App/Config/Source/RuntimeConfigSource.php(58): Magento\Config\App\Config\Source\RuntimeConfigSource->loadConfig()
#16 /var/www/html/vendor/magento/framework/App/Config/ConfigSourceAggregated.php(40): Magento\Config\App\Config\Source\RuntimeConfigSource->get('')
#17 /var/www/html/var/generation/Magento/Framework/App/Config/ConfigSourceAggregated/Proxy.php(95): Magento\Framework\App\Config\ConfigSourceAggregated->get('')
#18 /var/www/html/vendor/magento/module-config/App/Config/Type/System.php(161): Magento\Framework\App\Config\ConfigSourceAggregated\Proxy->get()
#19 /var/www/html/vendor/magento/module-config/App/Config/Type/System.php(112): Magento\Config\App\Config\Type\System->loadConfig()
#20 /var/www/html/vendor/magento/framework/App/Config.php(139): Magento\Config\App\Config\Type\System->get('default/web/sec...')
#21 /var/www/html/vendor/magento/framework/App/Config.php(90): Magento\Framework\App\Config->get('system', 'default/web/sec...')
#22 /var/www/html/vendor/magento/framework/App/Config.php(103): Magento\Framework\App\Config->getValue('web/secure/use_...', 'default', NULL)
#23 /var/www/html/vendor/magento/module-store/Model/HeaderProvider/Hsts.php(48): Magento\Framework\App\Config->isSetFlag('web/secure/use_...')
#24 /var/www/html/vendor/magento/framework/App/Response/HeaderManager.php(41): Magento\Store\Model\HeaderProvider\Hsts->canApply()
#25 /var/www/html/vendor/magento/framework/Interception/Interceptor.php(123): Magento\Framework\App\Response\HeaderManager->beforeSendResponse(Object(Magento\Framework\App\Response\Http\Interceptor))
#26 /var/www/html/var/generation/Magento/Framework/App/Response/Http/Interceptor.php(117): Magento\Framework\App\Response\Http\Interceptor->___callPlugins('sendResponse', Array, Array)
#27 /var/www/html/vendor/magento/framework/App/Http.php(185): Magento\Framework\App\Response\Http\Interceptor->sendResponse()
#28 /var/www/html/vendor/magento/framework/App/Http.php(156): Magento\Framework\App\Http->handleDeveloperMode(Object(Magento\Framework\App\Bootstrap), Object(Zend_Db_Adapter_Exception))
#29 /var/www/html/vendor/magento/framework/App/Bootstrap.php(263): Magento\Framework\App\Http->catchException(Object(Magento\Framework\App\Bootstrap), Object(Zend_Db_Adapter_Exception))
#30 /var/www/html/index.php(39): Magento\Framework\App\Bootstrap->run(Object(Magento\Framework\App\Http))
#31 {main}

Next Zend_Db_Adapter_Exception: SQLSTATE[HY000] [2002] No such file or directory in /var/www/html/vendor/magento/zendframework1/library/Zend/Db/Adapter/Pdo/Abstract.php:144
Stack trace:
#0 /var/www/html/vendor/magento/zendframework1/library/Zend/Db/Adapter/Pdo/Mysql.php(111): Zend_Db_Adapter_Pdo_Abstract->_connect()
#1 /var/www/html/vendor/magento/framework/DB/Adapter/Pdo/Mysql.php(353): Zend_Db_Adapter_Pdo_Mysql->_connect()
#2 /var/www/html/vendor/magento/zendframework1/library/Zend/Db/Adapter/Abstract.php(460): Magento\Framework\DB\Adapter\Pdo\Mysql->_connect()
#3 /var/www/html/vendor/magento/zendframework1/library/Zend/Db/Adapter/Pdo/Abstract.php(238): Zend_Db_Adapter_Abstract->query('SELECT `main_ta...', Array)
#4 /var/www/html/vendor/magento/framework/DB/Adapter/Pdo/Mysql.php(465): Zend_Db_Adapter_Pdo_Abstract->query('SELECT `main_ta...', Array)
#5 /var/www/html/vendor/magento/framework/DB/Adapter/Pdo/Mysql.php(520): Magento\Framework\DB\Adapter\Pdo\Mysql->_query('SELECT `main_ta...', Array)
#6 /var/www/html/vendor/magento/zendframework1/library/Zend/Db/Adapter/Abstract.php(737): Magento\Framework\DB\Adapter\Pdo\Mysql->query(Object(Magento\Framework\DB\Select), Array)
#7 /var/www/html/vendor/magento/framework/Data/Collection/Db/FetchStrategy/Query.php(21): Zend_Db_Adapter_Abstract->fetchAll(Object(Magento\Framework\DB\Select), Array)
#8 /var/www/html/vendor/magento/framework/Data/Collection/AbstractDb.php(772): Magento\Framework\Data\Collection\Db\FetchStrategy\Query->fetchAll(Object(Magento\Framework\DB\Select), Array)
#9 /var/www/html/vendor/magento/framework/Data/Collection/AbstractDb.php(668): Magento\Framework\Data\Collection\AbstractDb->_fetchAll(Object(Magento\Framework\DB\Select))
#10 /var/www/html/vendor/magento/framework/Data/Collection/AbstractDb.php(572): Magento\Framework\Data\Collection\AbstractDb->getData()
#11 /var/www/html/vendor/magento/framework/Data/Collection/AbstractDb.php(557): Magento\Framework\Data\Collection\AbstractDb->loadWithFilter(false, false)
#12 /var/www/html/vendor/magento/framework/Data/Collection.php(820): Magento\Framework\Data\Collection\AbstractDb->load()
#13 /var/www/html/vendor/magento/module-config/App/Config/Source/RuntimeConfigSource.php(78): Magento\Framework\Data\Collection->getIterator()
#14 /var/www/html/vendor/magento/module-config/App/Config/Source/RuntimeConfigSource.php(58): Magento\Config\App\Config\Source\RuntimeConfigSource->loadConfig()
#15 /var/www/html/vendor/magento/framework/App/Config/ConfigSourceAggregated.php(40): Magento\Config\App\Config\Source\RuntimeConfigSource->get('')
#16 /var/www/html/var/generation/Magento/Framework/App/Config/ConfigSourceAggregated/Proxy.php(95): Magento\Framework\App\Config\ConfigSourceAggregated->get('')
#17 /var/www/html/vendor/magento/module-config/App/Config/Type/System.php(161): Magento\Framework\App\Config\ConfigSourceAggregated\Proxy->get()
#18 /var/www/html/vendor/magento/module-config/App/Config/Type/System.php(112): Magento\Config\App\Config\Type\System->loadConfig()
#19 /var/www/html/vendor/magento/framework/App/Config.php(139): Magento\Config\App\Config\Type\System->get('default/web/sec...')
#20 /var/www/html/vendor/magento/framework/App/Config.php(90): Magento\Framework\App\Config->get('system', 'default/web/sec...')
#21 /var/www/html/vendor/magento/framework/App/Config.php(103): Magento\Framework\App\Config->getValue('web/secure/use_...', 'default', NULL)
#22 /var/www/html/vendor/magento/module-store/Model/HeaderProvider/Hsts.php(48): Magento\Framework\App\Config->isSetFlag('web/secure/use_...')
#23 /var/www/html/vendor/magento/framework/App/Response/HeaderManager.php(41): Magento\Store\Model\HeaderProvider\Hsts->canApply()
#24 /var/www/html/vendor/magento/framework/Interception/Interceptor.php(123): Magento\Framework\App\Response\HeaderManager->beforeSendResponse(Object(Magento\Framework\App\Response\Http\Interceptor))
#25 /var/www/html/var/generation/Magento/Framework/App/Response/Http/Interceptor.php(117): Magento\Framework\App\Response\Http\Interceptor->___callPlugins('sendResponse', Array, Array)
#26 /var/www/html/vendor/magento/framework/App/Http.php(185): Magento\Framework\App\Response\Http\Interceptor->sendResponse()
#27 /var/www/html/vendor/magento/framework/App/Http.php(156): Magento\Framework\App\Http->handleDeveloperMode(Object(Magento\Framework\App\Bootstrap), Object(Zend_Db_Adapter_Exception))
#28 /var/www/html/vendor/magento/framework/App/Bootstrap.php(263): Magento\Framework\App\Http->catchException(Object(Magento\Framework\App\Bootstrap), Object(Zend_Db_Adapter_Exception))
#29 /var/www/html/index.php(39): Magento\Framework\App\Bootstrap->run(Object(Magento\Framework\App\Http))
#30 {main}