Zend_Db_Adapter_Exception: pdo_mysql extension is not installed in /var/www/magento2/lib/internal/Magento/Framework/DB/Adapter/Pdo/Mysql.php:373
Stack trace:
#0 /var/www/magento2/vendor/magento/zendframework1/library/Zend/Db/Adapter/Abstract.php(460): Magento\Framework\DB\Adapter\Pdo\Mysql->_connect()
#1 /var/www/magento2/vendor/magento/zendframework1/library/Zend/Db/Adapter/Pdo/Abstract.php(238): Zend_Db_Adapter_Abstract->query('SELECT `store_w...', Array)
#2 /var/www/magento2/lib/internal/Magento/Framework/DB/Adapter/Pdo/Mysql.php(533): Zend_Db_Adapter_Pdo_Abstract->query('SELECT `store_w...', Array)
#3 /var/www/magento2/lib/internal/Magento/Framework/DB/Adapter/Pdo/Mysql.php(605): Magento\Framework\DB\Adapter\Pdo\Mysql->_query('SELECT `store_w...', Array)
#4 /var/www/magento2/vendor/magento/zendframework1/library/Zend/Db/Adapter/Abstract.php(737): Magento\Framework\DB\Adapter\Pdo\Mysql->query(Object(Magento\Framework\DB\Select), Array)
#5 /var/www/magento2/app/code/Magento/Store/App/Config/Source/RuntimeConfigSource.php(87): Zend_Db_Adapter_Abstract->fetchAll(Object(Magento\Framework\DB\Select))
#6 /var/www/magento2/app/code/Magento/Store/App/Config/Source/RuntimeConfigSource.php(57): Magento\Store\App\Config\Source\RuntimeConfigSource->getEntities('store_website', 'code')
#7 /var/www/magento2/lib/internal/Magento/Framework/App/Config/ConfigSourceAggregated.php(40): Magento\Store\App\Config\Source\RuntimeConfigSource->get('')
#8 /var/www/magento2/generated/code/Magento/Framework/App/Config/ConfigSourceAggregated/Proxy.php(95): Magento\Framework\App\Config\ConfigSourceAggregated->get('')
#9 /var/www/magento2/app/code/Magento/Store/App/Config/Type/Scopes.php(63): Magento\Framework\App\Config\ConfigSourceAggregated\Proxy->get()
#10 /var/www/magento2/lib/internal/Magento/Framework/App/Config.php(131): Magento\Store\App\Config\Type\Scopes->get('stores/1')
#11 /var/www/magento2/app/code/Magento/Store/Model/StoreRepository.php(103): Magento\Framework\App\Config->get('scopes', 'stores/1', Array)
#12 /var/www/magento2/app/code/Magento/Store/Model/StoreRepository.php(122): Magento\Store\Model\StoreRepository->getById('1')
#13 /var/www/magento2/app/code/Magento/Store/Model/StoreResolver.php(171): Magento\Store\Model\StoreRepository->getActiveStoreById('1')
#14 /var/www/magento2/app/code/Magento/Store/Model/StoreResolver.php(109): Magento\Store\Model\StoreResolver->getDefaultStoreById('1')
#15 /var/www/magento2/app/code/Magento/Store/Model/StoreManager.php(157): Magento\Store\Model\StoreResolver->getCurrentStoreId()
#16 /var/www/magento2/generated/code/Magento/Store/Model/StoreManagerInterface/Proxy.php(119): Magento\Store\Model\StoreManager->getStore(NULL)
#17 /var/www/magento2/app/code/Magento/Store/Model/Resolver/Store.php(29): Magento\Store\Model\StoreManagerInterface\Proxy->getStore(NULL)
#18 /var/www/magento2/lib/internal/Magento/Framework/App/Config/ScopeCodeResolver.php(49): Magento\Store\Model\Resolver\Store->getScope(NULL)
#19 /var/www/magento2/lib/internal/Magento/Framework/App/Config.php(69): Magento\Framework\App\Config\ScopeCodeResolver->resolve('stores', NULL)
#20 /var/www/magento2/app/code/Magento/Developer/Model/Logger/Handler/Debug.php(63): Magento\Framework\App\Config->getValue('dev/debug/debug...', 'stores')
#21 /var/www/magento2/vendor/monolog/monolog/src/Monolog/Handler/AbstractProcessingHandler.php(29): Magento\Developer\Model\Logger\Handler\Debug->isHandling(Array)
#22 /var/www/magento2/vendor/monolog/monolog/src/Monolog/Logger.php(337): Monolog\Handler\AbstractProcessingHandler->handle(Array)
#23 /var/www/magento2/lib/internal/Magento/Framework/Logger/Monolog.php(48): Monolog\Logger->addRecord(400, 'pdo_mysql exten...', Array)
#24 /var/www/magento2/vendor/monolog/monolog/src/Monolog/Logger.php(616): Magento\Framework\Logger\Monolog->addRecord(400, 'pdo_mysql exten...', Array)
#25 /var/www/magento2/lib/internal/Magento/Framework/App/Bootstrap.php(262): Monolog\Logger->error('pdo_mysql exten...')
#26 /var/www/magento2/index.php(39): Magento\Framework\App\Bootstrap->run(Object(Magento\Framework\App\Http\Interceptor))
#27 {main}