# sealer cluster
Cluster module command line
- sealer cert - Update Kubernetes API server's cert
- sealer delete - delete an existing cluster
- sealer apply - apply a Kubernetes cluster via specified Clusterfile
- sealer scale-up - scale-up new master or worker node to specified cluster
- sealer run - start to run a cluster from a Sealer Image
- sealer rollback - rollback a Kubernetes cluster via specified Clusterfile
- sealer upgrade - upgrade the kubernetes version of an existing cluster from a Sealer Image