Swarm-only images

Installing MKE in Swarm-only mode pulls the following set of images, which is smaller than that of a typical MKE installation:

• ucp-agent (ucp-agent-win on Windows)
• ucp-auth-store
• ucp-auth
• ucp-azure-ip-allocator
• ucp-cfssl
• ucp-compose
• ucp-containerd-shim-process (ucp-containerd-shim-process-win on Windows)
• ucp-controller
• ucp-dsinfo (ucp-dsinfo-win on Windows)
• ucp-etcd
• ucp-interlock-config
• ucp-interlock-extension
• ucp-interlock-proxy
• ucp-interlock
• ucp-metrics
• ucp-sf-notifier
• ucp-swarm