= Docker Configuration =

Both `docker(1)` and `dockerd(8)` are configured by the same files.

<<TableOfContents>>

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== Configuration Files ==

`dockerd(8)` is configured primarily with `/etc/docker/daemon.json`.

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== IPv6 ==

To enable [[Protocols/IP|IPv6]], update the configuration file like:

{{{
{
  "ipv6": true,
  "fixed-cidr-v6": "2001:db8:1::/64"
}
}}}

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== Logging ==

By default, `dockerd(8)` writes logs in JSON format without a limit for storage size. To add log rotation, update the configuration file like:

{{{
{
  "log-driver": "json-file",
  "log-opts": {
    "max-size": "1m",
    "max-file": "3"
  }
}
}}}

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== Storage ==

Images are written to `/var/lib/docker` by default. To configure this, update the configuration file like:

{{{
{
  "data-root": "/path/to/new/data/root"
}
}}}



=== Volumes ===

[[Docker/Volumes|Volumes]] are written to `/var/lib/docker/volumes` by default. This location follows the `data-root` set above.

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== Registries ==

`docker(1)` refuses to use an insecure registry, including one using a self-signed certificate. To circumvent this, update the `dockerd(8)` configuration like:

{{{
{
  "insecure-registries": [
    "registry.example.com:8080"
  ]
}
}}}



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CategoryRicottone