PDOException: SQLSTATE[HY000] [2002] Connection refused 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...', 'admin', 'p3trichor!', 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(347): Zend_Db_Adapter_Pdo_Mysql->_connect()
#3 /var/www/html/vendor/magento/zendframework1/library/Zend/Db/Adapter/Abstract.php(861): Magento\Framework\DB\Adapter\Pdo\Mysql->_connect()
#4 /var/www/html/vendor/magento/zendframework1/library/Zend/Db/Adapter/Abstract.php(931): Zend_Db_Adapter_Abstract->quote('default', NULL)
#5 /var/www/html/vendor/magento/framework/DB/Adapter/Pdo/Mysql.php(1372): Zend_Db_Adapter_Abstract->quoteInto('{{fieldName}} =...', 'default', NULL, NULL)
#6 /var/www/html/vendor/magento/framework/DB/Adapter/Pdo/Mysql.php(2830): Magento\Framework\DB\Adapter\Pdo\Mysql->quoteInto('{{fieldName}} =...', 'default')
#7 /var/www/html/vendor/magento/framework/DB/Adapter/Pdo/Mysql.php(2814): Magento\Framework\DB\Adapter\Pdo\Mysql->_prepareQuotedSqlCondition('{{fieldName}} =...', 'default', '`scope`')
#8 /var/www/html/vendor/magento/framework/Data/Collection/AbstractDb.php(477): Magento\Framework\DB\Adapter\Pdo\Mysql->prepareSqlCondition('`scope`', 'default')
#9 /var/www/html/vendor/magento/framework/Data/Collection/AbstractDb.php(408): Magento\Framework\Data\Collection\AbstractDb->_getConditionSql('`scope`', 'default')
#10 /var/www/html/vendor/magento/framework/Data/Collection/AbstractDb.php(390): Magento\Framework\Data\Collection\AbstractDb->_translateCondition('scope', 'default')
#11 /var/www/html/vendor/magento/module-store/Model/ResourceModel/Config/Collection/Scoped.php(59): Magento\Framework\Data\Collection\AbstractDb->addFieldToFilter('scope', 'default')
#12 /var/www/html/vendor/magento/framework/Model/ResourceModel/Db/Collection/AbstractCollection.php(124): Magento\Store\Model\ResourceModel\Config\Collection\Scoped->_initSelect()
#13 /var/www/html/vendor/magento/module-store/Model/ResourceModel/Config/Collection/Scoped.php(48): Magento\Framework\Model\ResourceModel\Db\Collection\AbstractCollection->__construct(Object(Magento\Framework\Data\Collection\EntityFactory), Object(Magento\Framework\Logger\Monolog), Object(Magento\Framework\Data\Collection\Db\FetchStrategy\Query), Object(Magento\Framework\Event\Manager\Proxy), NULL, Object(Magento\Config\Model\ResourceModel\Config\Data))
#14 /var/www/html/vendor/magento/framework/ObjectManager/Factory/AbstractFactory.php(93): Magento\Store\Model\ResourceModel\Config\Collection\Scoped->__construct(Object(Magento\Framework\Data\Collection\EntityFactory), Object(Magento\Framework\Logger\Monolog), Object(Magento\Framework\Data\Collection\Db\FetchStrategy\Query), Object(Magento\Framework\Event\Manager\Proxy), Object(Magento\Config\Model\ResourceModel\Config\Data), 'default', NULL, NULL)
#15 /var/www/html/vendor/magento/framework/ObjectManager/Factory/Compiled.php(88): Magento\Framework\ObjectManager\Factory\AbstractFactory->createObject('Magento\\Store\\M...', Array)
#16 /var/www/html/vendor/magento/framework/ObjectManager/ObjectManager.php(57): Magento\Framework\ObjectManager\Factory\Compiled->create('Magento\\Store\\M...', Array)
#17 /var/www/html/var/generation/Magento/Store/Model/ResourceModel/Config/Collection/ScopedFactory.php(43): Magento\Framework\ObjectManager\ObjectManager->create('Magento\\Store\\M...', Array)
#18 /var/www/html/vendor/magento/module-store/Model/Config/Reader/DefaultReader.php(62): Magento\Store\Model\ResourceModel\Config\Collection\ScopedFactory->create(Array)
#19 /var/www/html/vendor/magento/framework/App/Config/ScopePool.php(112): Magento\Store\Model\Config\Reader\DefaultReader->read()
#20 /var/www/html/vendor/magento/framework/App/Config.php(45): Magento\Framework\App\Config\ScopePool->getScope('default', NULL)
#21 /var/www/html/vendor/magento/framework/App/Config.php(58): 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(26): 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}

Next Zend_Db_Adapter_Exception: SQLSTATE[HY000] [2002] Connection refused 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(347): Zend_Db_Adapter_Pdo_Mysql->_connect()
#2 /var/www/html/vendor/magento/zendframework1/library/Zend/Db/Adapter/Abstract.php(861): Magento\Framework\DB\Adapter\Pdo\Mysql->_connect()
#3 /var/www/html/vendor/magento/zendframework1/library/Zend/Db/Adapter/Abstract.php(931): Zend_Db_Adapter_Abstract->quote('default', NULL)
#4 /var/www/html/vendor/magento/framework/DB/Adapter/Pdo/Mysql.php(1372): Zend_Db_Adapter_Abstract->quoteInto('{{fieldName}} =...', 'default', NULL, NULL)
#5 /var/www/html/vendor/magento/framework/DB/Adapter/Pdo/Mysql.php(2830): Magento\Framework\DB\Adapter\Pdo\Mysql->quoteInto('{{fieldName}} =...', 'default')
#6 /var/www/html/vendor/magento/framework/DB/Adapter/Pdo/Mysql.php(2814): Magento\Framework\DB\Adapter\Pdo\Mysql->_prepareQuotedSqlCondition('{{fieldName}} =...', 'default', '`scope`')
#7 /var/www/html/vendor/magento/framework/Data/Collection/AbstractDb.php(477): Magento\Framework\DB\Adapter\Pdo\Mysql->prepareSqlCondition('`scope`', 'default')
#8 /var/www/html/vendor/magento/framework/Data/Collection/AbstractDb.php(408): Magento\Framework\Data\Collection\AbstractDb->_getConditionSql('`scope`', 'default')
#9 /var/www/html/vendor/magento/framework/Data/Collection/AbstractDb.php(390): Magento\Framework\Data\Collection\AbstractDb->_translateCondition('scope', 'default')
#10 /var/www/html/vendor/magento/module-store/Model/ResourceModel/Config/Collection/Scoped.php(59): Magento\Framework\Data\Collection\AbstractDb->addFieldToFilter('scope', 'default')
#11 /var/www/html/vendor/magento/framework/Model/ResourceModel/Db/Collection/AbstractCollection.php(124): Magento\Store\Model\ResourceModel\Config\Collection\Scoped->_initSelect()
#12 /var/www/html/vendor/magento/module-store/Model/ResourceModel/Config/Collection/Scoped.php(48): Magento\Framework\Model\ResourceModel\Db\Collection\AbstractCollection->__construct(Object(Magento\Framework\Data\Collection\EntityFactory), Object(Magento\Framework\Logger\Monolog), Object(Magento\Framework\Data\Collection\Db\FetchStrategy\Query), Object(Magento\Framework\Event\Manager\Proxy), NULL, Object(Magento\Config\Model\ResourceModel\Config\Data))
#13 /var/www/html/vendor/magento/framework/ObjectManager/Factory/AbstractFactory.php(93): Magento\Store\Model\ResourceModel\Config\Collection\Scoped->__construct(Object(Magento\Framework\Data\Collection\EntityFactory), Object(Magento\Framework\Logger\Monolog), Object(Magento\Framework\Data\Collection\Db\FetchStrategy\Query), Object(Magento\Framework\Event\Manager\Proxy), Object(Magento\Config\Model\ResourceModel\Config\Data), 'default', NULL, NULL)
#14 /var/www/html/vendor/magento/framework/ObjectManager/Factory/Compiled.php(88): Magento\Framework\ObjectManager\Factory\AbstractFactory->createObject('Magento\\Store\\M...', Array)
#15 /var/www/html/vendor/magento/framework/ObjectManager/ObjectManager.php(57): Magento\Framework\ObjectManager\Factory\Compiled->create('Magento\\Store\\M...', Array)
#16 /var/www/html/var/generation/Magento/Store/Model/ResourceModel/Config/Collection/ScopedFactory.php(43): Magento\Framework\ObjectManager\ObjectManager->create('Magento\\Store\\M...', Array)
#17 /var/www/html/vendor/magento/module-store/Model/Config/Reader/DefaultReader.php(62): Magento\Store\Model\ResourceModel\Config\Collection\ScopedFactory->create(Array)
#18 /var/www/html/vendor/magento/framework/App/Config/ScopePool.php(112): Magento\Store\Model\Config\Reader\DefaultReader->read()
#19 /var/www/html/vendor/magento/framework/App/Config.php(45): Magento\Framework\App\Config\ScopePool->getScope('default', NULL)
#20 /var/www/html/vendor/magento/framework/App/Config.php(58): Magento\Framework\App\Config->getValue('web/secure/use_...', 'default', NULL)
#21 /var/www/html/vendor/magento/module-store/Model/HeaderProvider/Hsts.php(48): Magento\Framework\App\Config->isSetFlag('web/secure/use_...')
#22 /var/www/html/vendor/magento/framework/App/Response/HeaderManager.php(41): Magento\Store\Model\HeaderProvider\Hsts->canApply()
#23 /var/www/html/vendor/magento/framework/Interception/Interceptor.php(123): Magento\Framework\App\Response\HeaderManager->beforeSendResponse(Object(Magento\Framework\App\Response\Http\Interceptor))
#24 /var/www/html/var/generation/Magento/Framework/App/Response/Http/Interceptor.php(26): Magento\Framework\App\Response\Http\Interceptor->___callPlugins('sendResponse', Array, Array)
#25 /var/www/html/vendor/magento/framework/App/Http.php(185): Magento\Framework\App\Response\Http\Interceptor->sendResponse()
#26 /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))
#27 /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))
#28 /var/www/html/index.php(39): Magento\Framework\App\Bootstrap->run(Object(Magento\Framework\App\Http))
#29 {main}