How can I use a custom logging handler with django? - django

Question

I'm trying to integrate logging with loki in my django app like this:
handler = logging_loki.LokiHandler(
url="http://localhost:3100/loki/api/v1/push",
tags={"app": "django", "env": ENV},
version="1",
)
LOGGING = {
'version': 1,
'disable_existing_loggers': False,
'formatters': {
'standard': {
'format': '[%(asctime)s] {%(module)s} [%(levelname)s] - %(message)s',
'datefmt': '%d-%m-%Y %H:%M:%S'
},
},
'handlers': {
'console': {
'level': 'INFO',
'class': 'logging.StreamHandler',
'formatter': 'standard',
}
},
'loggers': {
'': {
'handlers': ['console', handler], # this doesnt work
'level': 'DEBUG',
'propagate': True,
# 'name': ENV
}
}
}
What do I need to change so that django uses this custom handler? I tried just referencing the handler object in the logging dict but that didn't need to be the right approach.
I also tried this:
LOGGING_CONFIG = None
logging.config.dictConfig(LOGGING)
logging.getLogger(__name__).addHandler(handler)
but that's not sending any logs to loki

Answer 1

Try this:
LOGGING = {
'version': 1,
'disable_existing_loggers': False,
'formatters': {
'standard': {
'format': '[%(asctime)s] {%(module)s} [%(levelname)s] - %(message)s',
'datefmt': '%d-%m-%Y %H:%M:%S'
},
},
'handlers': {
'console': {
'level': 'INFO',
'class': 'logging.StreamHandler',
'formatter': 'standard',
},
'loki': {
'level': 'INFO',
'class': 'logging_loki.LokiHandler',
'url': "http://localhost:3100/loki/api/v1/push",
'tags' {"app": "django", "env": ENV},
'version': "1",
},
},
'loggers': {
'': {
'handlers': ['console', 'loki'],
'level': 'DEBUG',
'propagate': True,
}
}
}
Specifically, you have to:
Define you handler in the handlers dictionary in the LOGGING setting. The configuration here is used to specify the initialisation arguments for the handler.
Then assign this handler using its key (loki in the example I've given above) to the logger(s) you want it to handle.