CheckTools checks if the docker API server is responding.

CreateCluster creates a new single-node cluster container and initializes the cluster directory.

CreatePublishedPorts is the factory function for PublishedPorts creating a PublishedPorts struct based on the provided port specifications Parameters: - specs []string: A slice of strings representing the port specifications.

DeleteCluster removes the containers belonging to a cluster and its local directory.

GenerateRandomString is used to generate a random string that is used as a cluster secret.

GetAllContainerNames returns a list of all containernames that will be created.

GetContainerName generates the container names.

getKubeConfig grabs the kubeconfig from the running cluster and prints the path to stdout.

ListClusters prints a list of created clusters.

MergePortSpecs merges published ports for a given node nodeToPortSpecMap => map: node -> []portSpec role => server or worker name => container name.

Shell starts a new subshell with the KUBECONFIG pointing to the selected cluster.

StartCluster starts a stopped cluster container.

StopCluster stops a running cluster container (restartable).

ValidateHostname ensures that a cluster name is also a valid host name according to RFC 1123.

PublishedPorts is a struct used for exposing container ports on the host system.