How can I access CakePHP log files on Heroku?

Question

I\'ve deployed a CakePHP application to Heroku. CakePHP writes its logs in APP_ROOT/app/tmp/logs/error.log and APP_ROOT/app/tmp/logs/debug.log by d

Answer 1

In the latest versions of CakePHP (>= 3.6.0), the config/app.php file comes pre-configured to use an environment variable override for the stock debug and error logs. These vars should contain a DSN-style string defining the same attributes you would normally place in your config/app.php file.

In the Heroku dashboard under Settings (or via the heroku cli tool), you can add the following ENV vars:

LOG_DEBUG_URL = file:///?className=Cake%5CLog%5CEngine%5CConsoleLog&levels[]=notice&levels[]=info&levels[]=debug
LOG_ERROR_URL = file:///?className=Cake%5CLog%5CEngine%5CConsoleLog&levels[]=warning&levels[]=error&levels[]=critical&levels[]=alert&levels[]=emergency

The above two lines replicate the stock CakePHP logging, but redirect all output to the console instead of files.

Answer 2

I think the following might work. Make sure you're using CakePHP 2.3.9.

App::uses('ConsoleOutput', 'Console');

CakeLog::config('default', array(
    'engine' => 'ConsoleLog',
    'stream' => new ConsoleOutput('php://stdout')
));

CakeLog::config('stdout', array(
    'engine' => 'ConsoleLog',
    'types' => array('notice', 'info'),
    'stream' => new ConsoleOutput('php://stdout')
));

CakeLog::config('stderr', array(
    'engine' => 'ConsoleLog',
    'types' => array('emergency', 'alert', 'critical', 'error', 'warning', 'debug'),
    'stream' =>  new ConsoleOutput('php://stderr')
));


CakeLog::config('debug', array(
    'engine' => 'ConsoleLog',
    'types' => array('notice', 'info', 'debug'),
    'format' => 'debug %s: %s',
    'stream' => new ConsoleOutput('php://stdout')
));

CakeLog::config('error', array(
    'engine' => 'ConsoleLog',
    'types' => array('warning', 'error', 'critical', 'alert', 'emergency'),
    'format' => 'error %s: %s',
    'stream' =>  new ConsoleOutput('php://stderr')
));

Answer 3

From the Heroku documentation: https://devcenter.heroku.com/articles/php-logging#cakephp

In your application configuration, instruct CakePHP to use the ConsoleLog engine for your logger setups:

CakeLog::config('default', array(
    'engine' => 'ConsoleLog',
));

You can then use the regular logging methods.

CakeLog::warning("Hello, this is a test message!");

Refer to the Logging section of the CakePHP manual for more information.