Python logging handler for Grafana Loki.
Project description
python-logging-loki
Python logging handler for Loki.
https://grafana.com/loki
Installation
pip install inuits-python-logging-loki
Usage
import logging
import logging_loki
handler = logging_loki.LokiHandler(
url="https://my-loki-instance/loki/api/v1/push",
tags={"application": "my-app"},
headers={"X-Scope-OrgID": "example-id"},
auth=("username", "password"),
props_to_labels = ["foo"]
)
logger = logging.getLogger("my-logger")
logger.addHandler(handler)
logger.error(
"Something happened",
extra={"tags": {"service": "my-service"}},
)
Example above will send Something happened
message along with these labels:
- Default labels from handler
- Message level as
serverity
- Logger's name as
logger
- Labels from
tags
item ofextra
dict - Property
foo
from log record will be sent as loki label
Properties to label
Using a dict instead of a list for props_to_labels
will enable renaming labels
handler = logging_loki.LokiHandler(
url="https://my-loki-instance/loki/api/v1/push",
tags={"application": "my-app"},
props_to_labels = {
"otelTraceID": "trace_id"
"otelSpanID": "span_id"
}
)
In this case, the properties otelTraceID
& otelSpanID
will be renamed to trace_id
& span_id
loki labels
Non-blocking mode
The given example is blocking (i.e. each call will wait for the message to be sent).
But you can use the built-in QueueHandler
and QueueListener
to send messages in a separate thread.
import logging.handlers
import logging_loki
from multiprocessing import Queue
queue = Queue(-1)
handler = logging.handlers.QueueHandler(queue)
handler_loki = logging_loki.LokiHandler(
url="https://my-loki-instance/loki/api/v1/push",
tags={"application": "my-app"},
headers={"X-Scope-OrgID": "example-id"},
auth=("username", "password"),
props_to_labels: Optional[list[str]] = ["foo"]
)
logging.handlers.QueueListener(queue, handler_loki)
logger = logging.getLogger("my-logger")
logger.addHandler(handler)
logger.error(...)
Or you can use LokiQueueHandler
shortcut, which will automatically create listener and handler.
import logging.handlers
import logging_loki
from multiprocessing import Queue
handler = logging_loki.LokiQueueHandler(
Queue(-1),
url="https://my-loki-instance/loki/api/v1/push",
tags={"application": "my-app"},
auth=("username", "password"),
)
logger = logging.getLogger("my-logger")
logger.addHandler(handler)
logger.error(...)
Project details
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