This is documentation for the next version of Loki. For the latest stable release, go to the latest version.
The labels stage is an action stage that takes data from the extracted map and modifies the label set that is sent to Loki with the log entry.
labels: # Key is REQUIRED and the name for the label that will be created. # Value is optional and will be the name from extracted data whose value # will be used for the value of the label. If empty, the value will be # inferred to be the same as the key. [ <string>: [<string>] ... ]
For the given pipeline:
- json: expressions: stream: stream - labels: stream:
Given the following log line:
The first stage would extract
stream into the extracted map with a value of
stderr. The labels stage would turn that key-value pair into a label, so the
log line sent to Loki would include the label
stream with a value of