% registries.conf(5) System-wide registry configuration file

% Brent Baude

% Aug 2017

# NAME

registries.conf - Syntax of System Registry Configuration File

# DESCRIPTION

The REGISTRIES configuration file is a system-wide configuration file for container image

registries. The file format is TOML.

# FORMAT

The TOML_format is used to build simple list format for registries under two

categories: `search` and `insecure`. You can list multiple registries using

as a comma separated list.

Search registries are used when the caller of a container runtime does not fully specify the

container image that they want to execute.  These registries are prepended onto the front

 of the specified container image until the named image is found at a registry.

Insecure Registries.  By default container runtimes use TLS when retrieving images

from a registry.  If the registry is not setup with TLS, then the container runtime

will fail to pull images from the registry. If you add the registry to the list of

insecure registries then the container runtime will attempt use standard web protocols to

pull the image.  It also allows you to pull from a registry with self-signed certificates.

Note insecure registries can be used for any registry, not just the

registries listed under search.

The following example configuration defines two searchable registries and one

insecure registry.

```

[registries.search]

registries = ["registry1.com", "registry2.com"]

[registries.insecure]

registries = ["registry3.com"]

```

# HISTORY

Aug 2017, Originally compiled by Brent Baude <bbaude@redhat.com>