By default files are removed, this means you won’t be able to use docker logs once the container is stopped. This indicates the driver to keep json log files once the container is stopped. You can use this if you don’t need to use docker logs and you run with limited disk space. This indicates the driver to not create log files on disk, however this means you won’t be able to use docker logs on the container anymore. Name used to validate the server certificate. Set the path to a client certificate file. Set the path to a custom certificate authority. It can be overridden by a pipeline stage. Set the tenant id (http header X-Scope-OrgID) when sending logs to Loki. The pipeline stage configuration provided as a string see pipeline stages and associated documentation.Ī Prometheus relabeling configuration allowing you to rename labels see relabeling. Pipeline stages allows to parse log lines to extract more labels, see associated documentation. The location of a pipeline stage configuration file ( example). The maximum amount of retries for a log batch. The maximum amount of time to wait before retrying a batch. The minimum amount of time to wait before retrying a batch. The amount of time to wait before sending a log batch complete or not. The timeout to use when sending logs to the Loki instance. Loki-external-labels have the default value of container_name=,cluster=prod) Loki-pipeline-stage-file, labels, env, and env-regex options. compose_project, compose_service: added when deploying with Docker Compose.Ĭustom labels can be added using the loki-external-labels, loki-pipeline-stages,.swarm_stack, swarm_service: added when deploying from Docker Swarm.host: the hostname where the log has been generated.filename: where the log is written to on disk.These labels are used to index log entries and query back logs using LogQL stream selector.īy default, the Docker driver will add the following labels to each log line: Loki can received a set of labels along with log line. Sent as Loki labels, this way you can filter by them in Grafana. Note: stack name and service name for each swarm service and project nameĪnd service name for each compose service are automatically discovered and Once deployed, the Grafana service will send its logs to Loki. Or with docker-compose: docker-compose -f docker-compose.yaml up Loki-url: can then deploy your stack using: docker stack deploy my_stack_name -compose-file docker-compose.yaml This also applies for docker-compose: version: "3.7" You can also configure the logging driver for a swarm serviceĭirectly in your compose file. Configure the logging driver for a Swarm service or Compose All newly created containers from that host will then send logs to Loki via the driver. The example above) must therefore be enclosed in quotes ( ").Īfter changing daemon.json, restart the Docker daemon for the changes to takeĮffect. Boolean and numeric values (such as the value for loki-batch-size in Note: log-opt configuration options in daemon.json must be provided as Options for the logging driver can also be configured with log-opts in the If you want the Loki logging driver to be the default for all containers,Ĭhange Docker’s daemon.json file (located in /etc/docker on Linux) and set You can deactivate this behavior by setting the log option no-file to true. Keep in mind that default values for these options are not taken from json-log configuration. You can adjust file size and rotation using the respective log option max-size and max-file. Note: The Loki logging driver still uses the json-log driver in combination with sending logs to Loki, this is mainly useful to keep the docker logs command working. The following command will start Grafana in a container and send logs to GrafanaĬloud, using a batch size of 400 entries and no more than 5 retries if a send log-opt can be passed multiple times for each option to be set. The logging driver supports can be set using the -log-opt = flag. Than the Docker daemon’s default with the -log-driver flag. The docker run command can be configured to use a different logging driver Installationīefore configuring the plugin, install or upgrade the Grafana Loki Docker Driver Client Change the logging driver for a container The Docker daemon on each machine has a default logging driver andĮach container will use the default driver unless configured otherwise. Configuration Configuring the Docker Driver
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