diff --git a/docs/reference/dockerd.md b/docs/reference/dockerd.md index c13c20a86495..942b029a9ffb 100644 --- a/docs/reference/dockerd.md +++ b/docs/reference/dockerd.md @@ -79,6 +79,7 @@ Options: --label list Set key=value labels to the daemon --live-restore Enable live restore of docker when containers are still running --log-driver string Default driver for container logs (default "json-file") + --log-format string Set the logging format ("text"|"json") (default "text") -l, --log-level string Set the logging level ("debug"|"info"|"warn"|"error"|"fatal") (default "info") --log-opt map Default log driver options for containers (default map[]) --max-concurrent-downloads int Set the max concurrent downloads (default 3) @@ -890,6 +891,33 @@ Alternatively, you can set custom locations for CDI specifications using the When CDI is enabled for a daemon, you can view the configured CDI specification directories using the `docker info` command. +#### Daemon logging format + +The `--log-format` option or "log-format" option in the [daemon configuration file](#daemon-configuration-file) +lets you set the format for logs produced by the daemon. The logging format should +only be configured either through the `--log-format` command line option or +through the "log-format" field in the configuration file; using both +the command-line option and the "log-format" field in the configuration +file produces an error. If this option is not set, the default is "text". + +The following example configures the daemon through the `--log-format` command +line option to use `json` formatted logs; + +```console +$ dockerd --log-format=json +# ... +{"level":"info","msg":"API listen on /var/run/docker.sock","time":"2024-09-16T11:06:08.558145428Z"} +``` + +The following example shows a `daemon.json` configuration file with the +"log-format" set; + +```json +{ + "log-format": "json" +} +``` + ### Miscellaneous options IP masquerading uses address translation to allow containers without a public @@ -1089,6 +1117,7 @@ The following is a full example of the allowed configuration options on Linux: "labels": [], "live-restore": true, "log-driver": "json-file", + "log-format": "text", "log-level": "", "log-opts": { "cache-disabled": "false", @@ -1183,6 +1212,7 @@ The following is a full example of the allowed configuration options on Windows: "insecure-registries": [], "labels": [], "log-driver": "", + "log-format": "text", "log-level": "", "max-concurrent-downloads": 3, "max-concurrent-uploads": 5, diff --git a/man/dockerd.8.md b/man/dockerd.8.md index 2a769e5671dc..70fda3220c4a 100644 --- a/man/dockerd.8.md +++ b/man/dockerd.8.md @@ -52,6 +52,7 @@ dockerd - Enable daemon mode [**--label**[=*[]*]] [**--live-restore**[=**false**]] [**--log-driver**[=*json-file*]] +[**--log-format**="*text*|*json*"] [**--log-opt**[=*map[]*]] [**--mtu**[=*0*]] [**--max-concurrent-downloads**[=*3*]] @@ -324,6 +325,9 @@ unix://[/path/to/socket] to use. Default driver for container logs. Default is **json-file**. **Warning**: **docker logs** command works only for **json-file** logging driver. +**--log-format**="*text*|*json*" + Set the format for logs produced by the daemon. Default is "text". + **--log-opt**=[] Logging driver specific options.