AWS Elastic Beanstalk logging with python (django)

Question

How do you manage your application logs in AWS elastic beanstalk? Which file you write you application logs to?

I'm using the following Logging configuration in my development environment but this doesn't work when I deploy in AWS.

DEBUG_LOG_DIR = BASE_DIR + "/django_debug.log"
LOGGING = {
    'version': 1,
    'disable_existing_loggers': True,
    # How to format the output
    'formatters': {
        'standard': {
            'format' : "[%(asctime)s] %(levelname)s [%(name)s:%(lineno)s] %(message)s",
            'datefmt' : "%d/%b/%Y %H:%M:%S"
        },
    },
    # Log handlers (where to go)
    'handlers': {
        'null': {
            'level':'DEBUG',
            'class':'django.utils.log.NullHandler',
        },
        'log_file': {
            'level':'DEBUG',
            'class':'logging.handlers.RotatingFileHandler',
            'filename': DEBUG_LOG_DIR,
            'maxBytes': 50000,
            'backupCount': 2,
            'formatter': 'standard',
        },
        'console':{
            'level':'INFO',
            'class':'logging.StreamHandler',
            'formatter': 'standard'
        },
        'mail_admins': {
            'level': 'ERROR',
            'class': 'django.utils.log.AdminEmailHandler',
        },
    },
    # Loggers (where does the log come from)
    'loggers': {
        'repackager': {
            'handlers': ['console', 'log_file'],
            'level': 'DEBUG',
            'propagate': True,
        },
        'django': {
            'handlers':['console'],
            'propagate': True,
            'level':'WARN',
        },
        'django.db.backends': {
            'handlers': ['console', 'log_file'],
            'level': 'WARN',
            'propagate': False,
        },
        '': {
            'handlers': ['console', 'log_file'],
            'level': 'DEBUG',
        },
    }
}

Answer 1

I had a similar issue but on Elastic Beanstalk, so I created a config file (e.g. applogs.config) in .ebextensions folder of the app. This creates the app-logs folder if it is not there already and sets the file permissions and owner so that the app can write its logs there.

commands:
  00_create_dir:
    command: mkdir -p /var/log/app-logs
  01_change_permissions:
    command: chmod g+s /var/log/app-logs
  02_change_owner:
    command: chown wsgi:wsgi /var/log/app-logs

Finally, in your Django settings:

LOGGING = {
    'version': 1,
    'disable_existing_loggers': False,
    'handlers': {
        'file': {
            'level': 'DEBUG',
            'class': 'logging.FileHandler',
            'filename': '/var/log/app-logs/django.log',
        },
    },
    'loggers': {
        'django': {
            'handlers': ['file'],
            'level': 'DEBUG',
            'propagate': True,
        },
    },
}

Aditionally, if you want your log to be accessible from beanstalk logs using the web, add this to your file in .ebextensions

files:
  "/opt/elasticbeanstalk/tasks/taillogs.d/django.conf":
    mode: "000755"
    owner: root
    group: root
    content: |
      /var/log/app-logs/django.log