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skopeo-list-tags(1) General Commands Manual 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 authentication file. Default is ${XDG_RUNTIME_DIR}/containers/auth.json, which is set using skopeo login.
If the authorization state is not found there, $HOME/.docker/config.json is checked, which is set using docker login.

--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 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". By default, uses the authorization state in either $XDG_RUNTIME_DIR/containers/auth.json, which is set using (skopeo login). If the authorization state is not found there, $HOME/.docker/config.json is checked, which is set using (docker login).
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⟩