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115 lines
4.6 KiB
Markdown
115 lines
4.6 KiB
Markdown
<!--[metadata]>
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+++
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title = "Configure logging drivers"
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description = "Configure logging driver."
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keywords = ["Fluentd, docker, logging, driver"]
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[menu.main]
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parent = "smn_logging"
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+++
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<![end-metadata]-->
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# Configure logging drivers
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The container can have a different logging driver than the Docker daemon. Use
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the `--log-driver=VALUE` with the `docker run` command to configure the
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container's logging driver. The following options are supported:
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| `none` | Disables any logging for the container. `docker logs` won't be available with this driver. |
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|-------------|-------------------------------------------------------------------------------------------------------------------------------|
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| `json-file` | Default logging driver for Docker. Writes JSON messages to file. No logging options are supported for this driver. |
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| `syslog` | Syslog logging driver for Docker. Writes log messages to syslog. |
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| `journald` | Journald logging driver for Docker. Writes log messages to `journald`. |
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| `gelf` | Graylog Extended Log Format (GELF) logging driver for Docker. Writes log messages to a GELF endpoint likeGraylog or Logstash. |
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| `fluentd` | Fluentd logging driver for Docker. Writes log messages to `fluentd` (forward input). |
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The `docker logs`command is available only for the `json-file` logging driver.
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### The syslog options
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The following logging options are supported for the `syslog` logging driver:
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--log-opt syslog-address=[tcp|udp]://host:port
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--log-opt syslog-address=unix://path
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--log-opt syslog-facility=daemon
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--log-opt syslog-tag="mailer"
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`syslog-address` specifies the remote syslog server address where the driver connects to.
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If not specified it defaults to the local unix socket of the running system.
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If transport is either `tcp` or `udp` and `port` is not specified it defaults to `514`
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The following example shows how to have the `syslog` driver connect to a `syslog`
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remote server at `192.168.0.42` on port `123`
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$ docker run --log-driver=syslog --log-opt syslog-address=tcp://192.168.0.42:123
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The `syslog-facility` option configures the syslog facility. By default, the system uses the
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`daemon` value. To override this behavior, you can provide an integer of 0 to 23 or any of
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the following named facilities:
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* `kern`
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* `user`
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* `mail`
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* `daemon`
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* `auth`
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* `syslog`
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* `lpr`
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* `news`
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* `uucp`
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* `cron`
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* `authpriv`
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* `ftp`
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* `local0`
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* `local1`
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* `local2`
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* `local3`
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* `local4`
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* `local5`
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* `local6`
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* `local7`
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The `syslog-tag` specifies a tag that identifies the container's syslog messages. By default,
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the system uses the first 12 characters of the container id. To override this behavior, specify
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a `syslog-tag` option
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## Specify journald options
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The `journald` logging driver stores the container id in the journal's `CONTAINER_ID` field. For detailed information on
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working with this logging driver, see [the journald logging driver](/reference/logging/journald/)
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reference documentation.
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## Specify gelf options
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The GELF logging driver supports the following options:
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--log-opt gelf-address=udp://host:port
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--log-opt gelf-tag="database"
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The `gelf-address` option specifies the remote GELF server address that the
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driver connects to. Currently, only `udp` is supported as the transport and you must
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specify a `port` value. The following example shows how to connect the `gelf`
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driver to a GELF remote server at `192.168.0.42` on port `12201`
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$ docker run --log-driver=gelf --log-opt gelf-address=udp://192.168.0.42:12201
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The `gelf-tag` option specifies a tag for easy container identification.
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## Specify fluentd options
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You can use the `--log-opt NAME=VALUE` flag to specify these additional Fluentd logging driver options.
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- `fluentd-address`: specify `host:port` to connect [localhost:24224]
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- `fluentd-tag`: specify tag for `fluentd` message,
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When specifying a `fluentd-tag` value, you can use the following markup tags:
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- `{{.ID}}`: short container id (12 characters)
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- `{{.FullID}}`: full container id
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- `{{.Name}}`: container name
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For example, to specify both additional options:
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`docker run --log-driver=fluentd --log-opt fluentd-address=localhost:24224 --log-opt fluentd-tag=docker.{{.Name}}`
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If container cannot connect to the Fluentd daemon on the specified address,
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the container stops immediately. For detailed information on working with this
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logging driver, see [the journald logging driver](/reference/logging/fluentd/)
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