diff --git a/docs/reference/dockerd.md b/docs/reference/dockerd.md index c13c20a864..bb603c9b38 100644 --- a/docs/reference/dockerd.md +++ b/docs/reference/dockerd.md @@ -57,6 +57,7 @@ Options: --exec-opt list Runtime execution options --exec-root string Root directory for execution state files (default "/var/run/docker") --experimental Enable experimental features + --feature map Enable feature in the daemon --fixed-cidr string IPv4 subnet for fixed IPs --fixed-cidr-v6 string IPv6 subnet for fixed IPs -G, --group string Group for the unix socket (default "docker") @@ -79,6 +80,7 @@ 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 +892,33 @@ 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 @@ -971,6 +1000,36 @@ Example of usage: } ``` +### Enable feature in the daemon (--feature) + +The `--feature` option lets you enable or disable a feature in the daemon. +This option corresponds with the "features" field in the [daemon.json configuration file](#daemon-configuration-file). +Features should only be configured either through the `--feature` command line +option or through the "features" field in the configuration file; using both +the command-line option and the "features" field in the configuration +file produces an error. The feature option can be specified multiple times +to configure multiple features. The `--feature` option accepts a name and +optional boolean value. When omitting the value, the default is `true`. + +The following example runs the daemon with the `cdi` and `containerd-snapshotter` +features enabled. The `cdi` option is provided with a value; + +```console +$ dockerd --feature cdi=true --feature containerd-snapshotter +``` + +The following example is the equivalent using the `daemon.json` configuration +file; + +```json +{ + "features": { + "cdi": true, + "containerd-snapshotter": true + } +} +``` + ### Daemon configuration file The `--config-file` option allows you to set any configuration option @@ -1065,7 +1124,10 @@ The following is a full example of the allowed configuration options on Linux: "exec-opts": [], "exec-root": "", "experimental": false, - "features": {}, + "features": { + "cdi": true, + "containerd-snapshotter": true + }, "fixed-cidr": "", "fixed-cidr-v6": "", "group": "", @@ -1089,6 +1151,7 @@ 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 +1246,7 @@ 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 2a769e5671..4f2d4b809b 100644 --- a/man/dockerd.8.md +++ b/man/dockerd.8.md @@ -31,6 +31,7 @@ dockerd - Enable daemon mode [**--exec-opt**[=*[]*]] [**--exec-root**[=*/var/run/docker*]] [**--experimental**[=**false**]] +[**--feature**[=*NAME*[=**true**|**false**]] [**--fixed-cidr**[=*FIXED-CIDR*]] [**--fixed-cidr-v6**[=*FIXED-CIDR-V6*]] [**-G**|**--group**[=*docker*]] @@ -52,6 +53,7 @@ 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*]] @@ -222,6 +224,14 @@ $ sudo dockerd --add-runtime runc=runc --add-runtime custom=/usr/local/bin/my-ru **--experimental**="" Enable the daemon experimental features. +**--feature**=*NAME*[=**true**|**false**] + Enable or disable a feature in the daemon. This option corresponds + with the "features" field in the daemon.json configuration file. Using + both the command-line option and the "features" field in the configuration + file produces an error. The feature option can be specified multiple times + to configure multiple features. + Usage example: `--feature containerd-snapshotter` or `--feature containerd-snapshotter=true`. + **--fixed-cidr**="" IPv4 subnet for fixed IPs (e.g., 10.20.0.0/16); this subnet must be nested in the bridge subnet (which is defined by \-b or \-\-bip). @@ -324,6 +334,9 @@ 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.