yii\db\Exception#1
(
    [errorInfo] => [
        0 => 'HY000'
        1 => 2002
        2 => 'No route to host'
    ]
    [*:message] => 'SQLSTATE[HY000] [2002] No route to host'
    [Exception:string] => ''
    [*:code] => 2002
    [*:file] => '/var/www/html/vendor/yiisoft/yii2/db/Connection.php'
    [*:line] => 649
    [Exception:trace] => [
        0 => [
            'file' => '/var/www/html/vendor/yiisoft/yii2/db/Connection.php'
            'line' => 1059
            'function' => 'open'
            'class' => 'yii\\db\\Connection'
            'type' => '->'
            'args' => []
        ]
        1 => [
            'file' => '/var/www/html/vendor/yiisoft/yii2/db/Connection.php'
            'line' => 1046
            'function' => 'getMasterPdo'
            'class' => 'yii\\db\\Connection'
            'type' => '->'
            'args' => []
        ]
        2 => [
            'file' => '/var/www/html/vendor/yiisoft/yii2/db/Schema.php'
            'line' => 463
            'function' => 'getSlavePdo'
            'class' => 'yii\\db\\Connection'
            'type' => '->'
            'args' => []
        ]
        3 => [
            'file' => '/var/www/html/vendor/yiisoft/yii2/db/Connection.php'
            'line' => 938
            'function' => 'quoteValue'
            'class' => 'yii\\db\\Schema'
            'type' => '->'
            'args' => [
                0 => 'ooo-service-grad'
            ]
        ]
        4 => [
            'file' => '/var/www/html/vendor/yiisoft/yii2/db/Command.php'
            'line' => 211
            'function' => 'quoteValue'
            'class' => 'yii\\db\\Connection'
            'type' => '->'
            'args' => [
                0 => 'ooo-service-grad'
            ]
        ]
        5 => [
            'file' => '/var/www/html/vendor/yiisoft/yii2/db/Command.php'
            'line' => 1126
            'function' => 'getRawSql'
            'class' => 'yii\\db\\Command'
            'type' => '->'
            'args' => []
        ]
        6 => [
            'file' => '/var/www/html/vendor/yiisoft/yii2/db/Command.php'
            'line' => 1147
            'function' => 'logQuery'
            'class' => 'yii\\db\\Command'
            'type' => '->'
            'args' => [
                0 => 'yii\\db\\Command::query'
            ]
        ]
        7 => [
            'file' => '/var/www/html/vendor/yiisoft/yii2/db/Command.php'
            'line' => 424
            'function' => 'queryInternal'
            'class' => 'yii\\db\\Command'
            'type' => '->'
            'args' => [
                0 => 'fetch'
                1 => null
            ]
        ]
        8 => [
            'file' => '/var/www/html/vendor/yiisoft/yii2/db/Query.php'
            'line' => 287
            'function' => 'queryOne'
            'class' => 'yii\\db\\Command'
            'type' => '->'
            'args' => []
        ]
        9 => [
            'file' => '/var/www/html/vendor/yiisoft/yii2/db/ActiveQuery.php'
            'line' => 304
            'function' => 'one'
            'class' => 'yii\\db\\Query'
            'type' => '->'
            'args' => [
                0 => null
            ]
        ]
        10 => [
            'file' => '/var/www/html/components/Controller.php'
            'line' => 152
            'function' => 'one'
            'class' => 'yii\\db\\ActiveQuery'
            'type' => '->'
            'args' => []
        ]
        11 => [
            'file' => '/var/www/html/components/Controller.php'
            'line' => 42
            'function' => 'setSite'
            'class' => 'app\\components\\Controller'
            'type' => '->'
            'args' => []
        ]
        12 => [
            'file' => '/var/www/html/vendor/yiisoft/yii2/base/BaseObject.php'
            'line' => 109
            'function' => 'init'
            'class' => 'app\\components\\Controller'
            'type' => '->'
            'args' => []
        ]
        13 => [
            'file' => '/var/www/html/vendor/yiisoft/yii2/base/Controller.php'
            'line' => 98
            'function' => '__construct'
            'class' => 'yii\\base\\BaseObject'
            'type' => '->'
            'args' => [
                0 => []
            ]
        ]
        14 => [
            'function' => '__construct'
            'class' => 'yii\\base\\Controller'
            'type' => '->'
            'args' => [
                0 => 'pages'
                1 => yii\web\Application#2
                (
                    [defaultRoute] => 'site'
                    [catchAll] => null
                    [controller] => null
                    [yii\web\Application:_homeUrl] => null
                    [controllerNamespace] => 'app\\controllers'
                    [name] => 'My Application'
                    [charset] => 'UTF-8'
                    [language] => 'ru'
                    [sourceLanguage] => 'en_US'
                    [layout] => 'main'
                    [requestedRoute] => 'pages/about'
                    [requestedAction] => null
                    [requestedParams] => null
                    [extensions] => [...]
                    [bootstrap] => [...]
                    [state] => 3
                    [loadedModules] => [...]
                    [yii\base\Application:_runtimePath] => '/var/www/html/runtime'
                    [yii\base\Application:_vendorPath] => '/var/www/html/vendor'
                    [params] => [...]
                    [id] => 'basic'
                    [module] => null
                    [controllerMap] => [...]
                    [yii\base\Module:_basePath] => '/var/www/html'
                    [yii\base\Module:_viewPath] => null
                    [yii\base\Module:_layoutPath] => null
                    [yii\base\Module:_modules] => [...]
                    [yii\base\Module:_version] => null
                    [yii\di\ServiceLocator:_components] => [...]
                    [yii\di\ServiceLocator:_definitions] => [...]
                    [yii\base\Component:_events] => [...]
                    [yii\base\Component:_eventWildcards] => [...]
                    [yii\base\Component:_behaviors] => [...]
                )
                2 => []
            ]
        ]
        15 => [
            'file' => '/var/www/html/vendor/yiisoft/yii2/di/Container.php'
            'line' => 412
            'function' => 'newInstanceArgs'
            'class' => 'ReflectionClass'
            'type' => '->'
            'args' => [
                0 => [
                    0 => 'pages'
                    1 => yii\web\Application#2(...)
                    2 => [...]
                ]
            ]
        ]
        16 => [
            'file' => '/var/www/html/vendor/yiisoft/yii2/di/Container.php'
            'line' => 171
            'function' => 'build'
            'class' => 'yii\\di\\Container'
            'type' => '->'
            'args' => [
                0 => 'app\\controllers\\PagesController'
                1 => [
                    0 => 'pages'
                    1 => yii\web\Application#2(...)
                ]
                2 => []
            ]
        ]
        17 => [
            'file' => '/var/www/html/vendor/yiisoft/yii2/BaseYii.php'
            'line' => 345
            'function' => 'get'
            'class' => 'yii\\di\\Container'
            'type' => '->'
            'args' => [
                0 => 'app\\controllers\\PagesController'
                1 => [
                    0 => 'pages'
                    1 => yii\web\Application#2(...)
                ]
            ]
        ]
        18 => [
            'file' => '/var/www/html/vendor/yiisoft/yii2/base/Module.php'
            'line' => 648
            'function' => 'createObject'
            'class' => 'yii\\BaseYii'
            'type' => '::'
            'args' => [
                0 => 'app\\controllers\\PagesController'
                1 => [
                    0 => 'pages'
                    1 => yii\web\Application#2(...)
                ]
            ]
        ]
        19 => [
            'file' => '/var/www/html/vendor/yiisoft/yii2/base/Module.php'
            'line' => 602
            'function' => 'createControllerByID'
            'class' => 'yii\\base\\Module'
            'type' => '->'
            'args' => [
                0 => 'pages'
            ]
        ]
        20 => [
            'file' => '/var/www/html/vendor/yiisoft/yii2/base/Module.php'
            'line' => 528
            'function' => 'createController'
            'class' => 'yii\\base\\Module'
            'type' => '->'
            'args' => [
                0 => 'about'
            ]
        ]
        21 => [
            'file' => '/var/www/html/vendor/yiisoft/yii2/web/Application.php'
            'line' => 104
            'function' => 'runAction'
            'class' => 'yii\\base\\Module'
            'type' => '->'
            'args' => [
                0 => 'pages/about'
                1 => []
            ]
        ]
        22 => [
            'file' => '/var/www/html/vendor/yiisoft/yii2/base/Application.php'
            'line' => 392
            'function' => 'handleRequest'
            'class' => 'yii\\web\\Application'
            'type' => '->'
            'args' => [
                0 => yii\web\Request#3
                (
                    [enableCsrfValidation] => true
                    [csrfParam] => '_csrf'
                    [csrfCookie] => [...]
                    [enableCsrfCookie] => true
                    [enableCookieValidation] => true
                    [cookieValidationKey] => 'jsd9f823yu89_cnwdop;320r-i0r'
                    [methodParam] => '_method'
                    [parsers] => [...]
                    [trustedHosts] => [...]
                    [secureHeaders] => [...]
                    [ipHeaders] => [...]
                    [secureProtocolHeaders] => [...]
                    [yii\web\Request:_cookies] => null
                    [yii\web\Request:_headers] => yii\web\HeaderCollection(...)
                    [yii\web\Request:_rawBody] => null
                    [yii\web\Request:_bodyParams] => null
                    [yii\web\Request:_queryParams] => null
                    [yii\web\Request:_hostInfo] => 'http://ooo-service-grad.kvado.ru'
                    [yii\web\Request:_hostName] => null
                    [yii\web\Request:_baseUrl] => ''
                    [yii\web\Request:_scriptUrl] => '/index.php'
                    [yii\web\Request:_scriptFile] => null
                    [yii\web\Request:_pathInfo] => 'about'
                    [yii\web\Request:_url] => '/about'
                    [yii\web\Request:_port] => null
                    [yii\web\Request:_securePort] => null
                    [yii\web\Request:_contentTypes] => null
                    [yii\web\Request:_languages] => null
                    [yii\web\Request:_csrfToken] => null
                    [yii\web\Request:_secureForwardedHeaderParts] => [...]
                    [yii\base\Request:_isConsoleRequest] => null
                    [yii\base\Component:_events] => [...]
                    [yii\base\Component:_eventWildcards] => [...]
                    [yii\base\Component:_behaviors] => null
                    [yii\base\Request:_scriptFile] => null
                )
            ]
        ]
        23 => [
            'file' => '/var/www/html/web/index.php'
            'line' => 35
            'function' => 'run'
            'class' => 'yii\\base\\Application'
            'type' => '->'
            'args' => []
        ]
    ]
    [Exception:previous] => PDOException#4
    (
        [*:message] => 'SQLSTATE[HY000] [2002] No route to host'
        [Exception:string] => ''
        [*:code] => 2002
        [*:file] => '/var/www/html/vendor/yiisoft/yii2/db/Connection.php'
        [*:line] => 719
        [Exception:trace] => [
            0 => [
                'file' => '/var/www/html/vendor/yiisoft/yii2/db/Connection.php'
                'line' => 719
                'function' => '__construct'
                'class' => 'PDO'
                'type' => '->'
                'args' => [
                    0 => 'mysql:host=mysql.kvado-production;dbname=kvado'
                    1 => 'kvado-site'
                    2 => 'Dto9AHWbo9sB'
                    3 => null
                ]
            ]
            1 => [
                'file' => '/var/www/html/vendor/yiisoft/yii2/db/Connection.php'
                'line' => 638
                'function' => 'createPdoInstance'
                'class' => 'yii\\db\\Connection'
                'type' => '->'
                'args' => []
            ]
            2 => [
                'file' => '/var/www/html/vendor/yiisoft/yii2/db/Connection.php'
                'line' => 1059
                'function' => 'open'
                'class' => 'yii\\db\\Connection'
                'type' => '->'
                'args' => []
            ]
            3 => [
                'file' => '/var/www/html/vendor/yiisoft/yii2/db/Connection.php'
                'line' => 1046
                'function' => 'getMasterPdo'
                'class' => 'yii\\db\\Connection'
                'type' => '->'
                'args' => []
            ]
            4 => [
                'file' => '/var/www/html/vendor/yiisoft/yii2/db/Schema.php'
                'line' => 463
                'function' => 'getSlavePdo'
                'class' => 'yii\\db\\Connection'
                'type' => '->'
                'args' => []
            ]
            5 => [
                'file' => '/var/www/html/vendor/yiisoft/yii2/db/Connection.php'
                'line' => 938
                'function' => 'quoteValue'
                'class' => 'yii\\db\\Schema'
                'type' => '->'
                'args' => [
                    0 => 'ooo-service-grad'
                ]
            ]
            6 => [
                'file' => '/var/www/html/vendor/yiisoft/yii2/db/Command.php'
                'line' => 211
                'function' => 'quoteValue'
                'class' => 'yii\\db\\Connection'
                'type' => '->'
                'args' => [
                    0 => 'ooo-service-grad'
                ]
            ]
            7 => [
                'file' => '/var/www/html/vendor/yiisoft/yii2/db/Command.php'
                'line' => 1126
                'function' => 'getRawSql'
                'class' => 'yii\\db\\Command'
                'type' => '->'
                'args' => []
            ]
            8 => [
                'file' => '/var/www/html/vendor/yiisoft/yii2/db/Command.php'
                'line' => 1147
                'function' => 'logQuery'
                'class' => 'yii\\db\\Command'
                'type' => '->'
                'args' => [
                    0 => 'yii\\db\\Command::query'
                ]
            ]
            9 => [
                'file' => '/var/www/html/vendor/yiisoft/yii2/db/Command.php'
                'line' => 424
                'function' => 'queryInternal'
                'class' => 'yii\\db\\Command'
                'type' => '->'
                'args' => [
                    0 => 'fetch'
                    1 => null
                ]
            ]
            10 => [
                'file' => '/var/www/html/vendor/yiisoft/yii2/db/Query.php'
                'line' => 287
                'function' => 'queryOne'
                'class' => 'yii\\db\\Command'
                'type' => '->'
                'args' => []
            ]
            11 => [
                'file' => '/var/www/html/vendor/yiisoft/yii2/db/ActiveQuery.php'
                'line' => 304
                'function' => 'one'
                'class' => 'yii\\db\\Query'
                'type' => '->'
                'args' => [
                    0 => null
                ]
            ]
            12 => [
                'file' => '/var/www/html/components/Controller.php'
                'line' => 152
                'function' => 'one'
                'class' => 'yii\\db\\ActiveQuery'
                'type' => '->'
                'args' => []
            ]
            13 => [
                'file' => '/var/www/html/components/Controller.php'
                'line' => 42
                'function' => 'setSite'
                'class' => 'app\\components\\Controller'
                'type' => '->'
                'args' => []
            ]
            14 => [
                'file' => '/var/www/html/vendor/yiisoft/yii2/base/BaseObject.php'
                'line' => 109
                'function' => 'init'
                'class' => 'app\\components\\Controller'
                'type' => '->'
                'args' => []
            ]
            15 => [
                'file' => '/var/www/html/vendor/yiisoft/yii2/base/Controller.php'
                'line' => 98
                'function' => '__construct'
                'class' => 'yii\\base\\BaseObject'
                'type' => '->'
                'args' => [
                    0 => [...]
                ]
            ]
            16 => [
                'function' => '__construct'
                'class' => 'yii\\base\\Controller'
                'type' => '->'
                'args' => [
                    0 => 'pages'
                    1 => yii\web\Application#2(...)
                    2 => [...]
                ]
            ]
            17 => [
                'file' => '/var/www/html/vendor/yiisoft/yii2/di/Container.php'
                'line' => 412
                'function' => 'newInstanceArgs'
                'class' => 'ReflectionClass'
                'type' => '->'
                'args' => [
                    0 => [...]
                ]
            ]
            18 => [
                'file' => '/var/www/html/vendor/yiisoft/yii2/di/Container.php'
                'line' => 171
                'function' => 'build'
                'class' => 'yii\\di\\Container'
                'type' => '->'
                'args' => [
                    0 => 'app\\controllers\\PagesController'
                    1 => [...]
                    2 => [...]
                ]
            ]
            19 => [
                'file' => '/var/www/html/vendor/yiisoft/yii2/BaseYii.php'
                'line' => 345
                'function' => 'get'
                'class' => 'yii\\di\\Container'
                'type' => '->'
                'args' => [
                    0 => 'app\\controllers\\PagesController'
                    1 => [...]
                ]
            ]
            20 => [
                'file' => '/var/www/html/vendor/yiisoft/yii2/base/Module.php'
                'line' => 648
                'function' => 'createObject'
                'class' => 'yii\\BaseYii'
                'type' => '::'
                'args' => [
                    0 => 'app\\controllers\\PagesController'
                    1 => [...]
                ]
            ]
            21 => [
                'file' => '/var/www/html/vendor/yiisoft/yii2/base/Module.php'
                'line' => 602
                'function' => 'createControllerByID'
                'class' => 'yii\\base\\Module'
                'type' => '->'
                'args' => [
                    0 => 'pages'
                ]
            ]
            22 => [
                'file' => '/var/www/html/vendor/yiisoft/yii2/base/Module.php'
                'line' => 528
                'function' => 'createController'
                'class' => 'yii\\base\\Module'
                'type' => '->'
                'args' => [
                    0 => 'about'
                ]
            ]
            23 => [
                'file' => '/var/www/html/vendor/yiisoft/yii2/web/Application.php'
                'line' => 104
                'function' => 'runAction'
                'class' => 'yii\\base\\Module'
                'type' => '->'
                'args' => [
                    0 => 'pages/about'
                    1 => [...]
                ]
            ]
            24 => [
                'file' => '/var/www/html/vendor/yiisoft/yii2/base/Application.php'
                'line' => 392
                'function' => 'handleRequest'
                'class' => 'yii\\web\\Application'
                'type' => '->'
                'args' => [
                    0 => yii\web\Request#3(...)
                ]
            ]
            25 => [
                'file' => '/var/www/html/web/index.php'
                'line' => 35
                'function' => 'run'
                'class' => 'yii\\base\\Application'
                'type' => '->'
                'args' => []
            ]
        ]
        [Exception:previous] => null
        [errorInfo] => [
            0 => 'HY000'
            1 => 2002
            2 => 'No route to host'
        ]
    )
)