docker/dtr join

Add a new replica to an existing DTR cluster


$ docker run -it --rm docker/dtr \
   join [command options]


This command installs DTR on the Docker Engine that runs the command, and joins the new installation to an existing cluster.

To set up a cluster with high-availability, add 3, 5, or 7 nodes to the cluster.

Option Description
--ucp-url Specify the UCP controller URL [$UCP_URL]
--ucp-username Specify the UCP admin username [$UCP_USERNAME]
--ucp-password Specify the UCP admin password [$UCP_PASSWORD]
--debug Enable debug mode, provides additional logging [$DEBUG]
--hub-username Specify the Docker Hub username for pulling images [$HUB_USERNAME]
--hub-password Specify the Docker Hub password for pulling images [$HUB_PASSWORD]
--ucp-insecure-tls Disable TLS verification for UCP [$UCP_INSECURE_TLS]
--ucp-ca Use a PEM-encoded TLS CA certificate for UCP [$UCP_CA]
--ucp-node Specify the host to install Docker Trusted Registry [$UCP_NODE]
--replica-id Specify the replica Id. Must be unique per replica, leave blank for random [$DTR_REPLICA_ID]
--unsafe Enable this flag to skip safety checks when installing or joining [$DTR_UNSAFE]
--existing-replica-id ID of an existing replica in a cluster [$DTR_EXISTING_REPLICA_ID]
--replica-http-port "0" Specify the public HTTP port for the DTR replica [$REPLICA_HTTP_PORT]
--replica-https-port "0" Specify the public HTTPS port for the DTR replica [$REPLICA_HTTPS_PORT]
--skip-network-test Whether to skip the overlay networking test or not [$DTR_SKIP_NETWORK_TEST]


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