# For more information on this configuration file, see containers-registries.conf(5). # # NOTE: RISK OF USING UNQUALIFIED IMAGE NAMES # We recommend always using fully qualified image names including the registry # server (full dns name), namespace, image name, and tag # (e.g., registry.opensuse.org/opensuse/tumbleweed:latest). Pulling by digest (i.e., # registry.opensuse.org/project/name@digest) further eliminates the ambiguity of tags. # When using short names, there is always an inherent risk that the image being # pulled could be spoofed. For example, a user wants to pull an image named # `foobar` from a registry and expects it to come from myregistry.com. If # myregistry.com is not first in the search list, an attacker could place a # different `foobar` image at a registry earlier in the search list. The user # would accidentally pull and run the attacker's image and code rather than the # intended content. We recommend only adding registries which are completely # trusted (i.e., registries which don't allow unknown or anonymous users to # create accounts with arbitrary names). This will prevent an image from being # spoofed, squatted or otherwise made insecure. If it is necessary to use one # of these registries, it should be added at the end of the list. # # # An array of host[:port] registries to try when pulling an unqualified image, in order. unqualified-search-registries = ["registry.opensuse.org", "docker.io"] # # [[registry]] # # The "prefix" field is used to choose the relevant [[registry]] TOML table; # # (only) the TOML table with the longest match for the input image name # # (taking into account namespace/repo/tag/digest separators) is used. # # # # The prefix can also be of the form: *.example.com for wildcard subdomain # # matching. # # # # If the prefix field is missing, it defaults to be the same as the "location" field. # prefix = "example.com/foo" # # # If true, unencrypted HTTP as well as TLS connections with untrusted # # certificates are allowed. # insecure = false # # # If true, pulling images with matching names is forbidden. # blocked = false # # # The physical location of the "prefix"-rooted namespace. # # # # By default, this is equal to "prefix" (in which case "prefix" can be omitted # # and the [[registry]] TOML table can only specify "location"). # # # # Example: Given # # prefix = "example.com/foo" # # location = "internal-registry-for-example.net/bar" # # requests for the image example.com/foo/myimage:latest will actually work with the # # internal-registry-for-example.net/bar/myimage:latest image. # # # The location can be empty iff prefix is in a # # wildcarded format: "*.example.com". In this case, the input reference will # # be used as-is without any rewrite. # location = internal-registry-for-example.com/bar" # # # (Possibly-partial) mirrors for the "prefix"-rooted namespace. # # # # The mirrors are attempted in the specified order; the first one that can be # # contacted and contains the image will be used (and if none of the mirrors contains the image, # # the primary location specified by the "registry.location" field, or using the unmodified # # user-specified reference, is tried last). # # # # Each TOML table in the "mirror" array can contain the following fields, with the same semantics # # as if specified in the [[registry]] TOML table directly: # # - location # # - insecure # [[registry.mirror]] # location = "example-mirror-0.local/mirror-for-foo" # [[registry.mirror]] # location = "example-mirror-1.local/mirrors/foo" # insecure = true # # Given the above, a pull of example.com/foo/image:latest will try: # # 1. example-mirror-0.local/mirror-for-foo/image:latest # # 2. example-mirror-1.local/mirrors/foo/image:latest # # 3. internal-registry-for-example.net/bar/image:latest # # in order, and use the first one that exists.