skopeo-list-tags(1)

NAME
skopeo-list-tags - List image names in a transport-specific collection of images.

SYNOPSIS
skopeo list-tags [options] source-image

Return a list of tags from source-image in a registry or a local docker-archive file.

source-image name of the repository to retrieve a tag listing from or a local docker-archive file.

OPTIONS
See also skopeo(1) for options placed before the subcommand name.

--authfile path

Path of the updated registry credentials file. On Linux, the default is ${XDG_RUNTIME_DIR}/containers/auth.json. See containers-auth.json(5) for more details about the credential search mechanism and defaults on other platforms.

Use skopeo login to manage the credentials.

The default value of this option is read from the REGISTRY\_AUTH\_FILE environment variable.

--creds username[:password] for accessing the registry.

--cert-dir path

Use certificates at path (*.crt, *.cert, *.key) to connect to the registry.

--help, -h

Print usage statement

--no-creds

Access the registry anonymously.

--registry-token Bearer token

Bearer token for accessing the registry.

--retry-times

The number of times to retry.

--retry-delay

Fixed delay between retries. If not set (or set to 0s), retry wait time will be exponentially increased based on the number of failed attempts.

--tls-verify=bool

Require HTTPS and verify certificates when talking to the container registry or daemon. Default to registry.conf setting.

--username

The username to access the registry.

--password

The password to access the registry.

REPOSITORY NAMES
Repository names are transport-specific references as each transport may have its own concept of a "repository" and "tags".

This commands refers to repositories using a transport:details format. The following formats are supported:

docker://docker-repository-reference
  A repository in a registry implementing the "Docker Registry HTTP API V2".
  A docker-repository-reference is of the form: registryhost:port/repositoryname which is similar to an image-reference but with no tag or digest allowed as the last component (e.g no :latest or @sha256:xyz)

      Examples of valid docker-repository-references:
        "docker.io/myuser/myrepo"
        "docker.io/nginx"
        "docker.io/library/fedora"
        "localhost:5000/myrepository"

      Examples of invalid references:
        "docker.io/nginx:latest"
        "docker.io/myuser/myimage:v1.0"
        "docker.io/myuser/myimage@sha256:f48c4cc192f4c3c6a069cb5cca6d0a9e34d6076ba7c214fd0cc3ca60e0af76bb"

**docker-archive:path[:docker-reference]
  more than one images were stored in a docker save-formatted file.

EXAMPLES

  Docker Transport
To get the list of tags in the "fedora" repository from the docker.io registry (the repository name expands to "library/fedora" per docker transport canonical form):

    $ skopeo list-tags docker://docker.io/fedora
    {
        "Repository": "docker.io/library/fedora",
        "Tags": [
            "20",
            "21",
            "22",
            "23",
            "24",
            "25",
            "26-modular",
            "26",
            "27",
            "28",
            "29",
            "30",
            "31",
            "32",
            "branched",
            "heisenbug",
            "latest",
            "modular",
            "rawhide"
        ]
    }

To list the tags in a local host docker/distribution registry on port 5000, in this case for the "fedora" repository:

    $ skopeo list-tags docker://localhost:5000/fedora
    {
        "Repository": "localhost:5000/fedora",
        "Tags": [
            "latest",
            "30",
            "31"
        ]
    }

  Docker-archive Transport
To list the tags in a local docker-archive file:

    $ skopeo list-tags docker-archive:/tmp/busybox.tar.gz
    {
        "Tags": [
            "busybox:1.28.3"
        ]
    }

Also supports more than one tags in an archive:

    $ skopeo list-tags docker-archive:/tmp/docker-two-images.tar.gz
    {
        "Tags": [
            "example.com/empty:latest",
            "example.com/empty/but:different"
        ]
    }

Will include a source-index entry for each untagged image:

    $ skopeo list-tags docker-archive:/tmp/four-tags-with-an-untag.tar
    {
        "Tags": [
            "image1:tag1",
            "image2:tag2",
            "@2",
            "image4:tag4"
        ]
    }

SEE ALSO
skopeo(1), skopeo-login(1), docker-login(1), containers-auth.json(5), containers-transports(1)

AUTHORS
Zach Hill zach@anchore.com ⟨mailto:zach@anchore.com⟩