docs/reference/join.md

docker/dtr join

Add a new replica to an existing DTR cluster

Description

This command creates a replica of an existing DTR on a node managed by Docker Universal Control Plane (UCP).

For setting DTR for high-availability, create 3, 5, or 7 replicas of DTR.

Options

Option	Description
--ucp-url	The UCP URL including domain and port
--ucp-username	The UCP administrator username
--ucp-password	The UCP administrator password
--debug	Enable debug mode for additional logging
--hub-username	Username to use when pulling images
--hub-password	Password to use when pulling images
--ucp-insecure-tls	Disable TLS verification for UCP
--ucp-ca	Use a PEM-encoded TLS CA certificate for UCP
--ucp-node	The hostname of the node to install DTR
--replica-id	Assign an ID to the DTR replica. By default the ID is random
--unsafe	Allow DTR to be installed on a UCP manager node
--existing-replica-id	The ID of an existing DTR replica
--replica-http-port	The public HTTP port for the DTR replica. Default is 80
--replica-https-port	The public HTTPS port for the DTR replica. Default is 443
--skip-network-test	Don't test if overlay networks are working correctly between UCP nodes
--extra-envs	Environment variables or swarm constraints for DTR containers. Format var=val[&var=val]