docker/dtr join
Estimated reading time: 2 minutesAdd a new replica to an existing DTR cluster
Usage
docker run -it --rm docker/dtr \
join [command options]
Description
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.
Options
| Option | Description |
|---|---|
--ucp-url |
Specify the UCP controller URL including domain and port |
--ucp-username |
Specify the UCP admin username |
--ucp-password |
Specify the UCP admin password |
--debug |
Enable debug mode, provides additional logging |
--hub-username |
Specify the Docker Hub username for pulling images |
--hub-password |
Specify the Docker Hub password for pulling images |
--ucp-insecure-tls |
Disable TLS verification for UCP |
--ucp-ca |
Use a PEM-encoded TLS CA certificate for UCP |
--ucp-node |
Specify the host to install Docker Trusted Registry |
--replica-id |
Specify the replica ID. Must be unique per replica, leave blank for random |
--unsafe |
Enable this flag to skip safety checks when installing or joining |
--existing-replica-id |
ID of an existing replica in a cluster |
--replica-http-port |
Specify the public HTTP port for the DTR replica; 0 means unchanged/default |
--replica-https-port |
Specify the public HTTPS port for the DTR replica; 0 means unchanged/default |
--skip-network-test |
Enable this flag to skip the overlay networking test |
--extra-envs |
List of extra environment variables to use for deploying the DTR containers for the replica. This can be used to specify swarm constraints. Separate the environment variables with ampersands (&). You can escape actual ampersands with backslashes (). Can’t be used in combination with --ucp-node |