mirror of https://github.com/docker/docs.git
46 lines
6.2 KiB
Markdown
46 lines
6.2 KiB
Markdown
---
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description: Docker Trusted Registry join command reference.
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keywords:
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- docker, registry, reference, join
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title: docker/dtr join
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---
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Add a new replica to an existing DTR cluster
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## Usage
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```bash
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$ docker run -it --rm docker/dtr \
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join [command options]
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```
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## Description
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This command installs DTR on the Docker Engine that runs the command,
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and joins the new installation to an existing cluster.
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To set up a cluster with high-availability, add 3, 5, or 7 nodes to
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the cluster.
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## Options
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| Option | Description |
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|:------------------------|:--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
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| `--ucp-url` | Specify the UCP controller URL including domain and port |
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| `--ucp-username` | Specify the UCP admin username |
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| `--ucp-password` | Specify the UCP admin password |
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| `--debug` | Enable debug mode, provides additional logging |
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| `--hub-username` | Specify the Docker Hub username for pulling images |
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| `--hub-password` | Specify the Docker Hub password for pulling images |
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| `--ucp-insecure-tls` | Disable TLS verification for UCP |
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| `--ucp-ca` | Use a PEM-encoded TLS CA certificate for UCP |
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| `--ucp-node` | Specify the host to install Docker Trusted Registry |
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| `--replica-id` | Specify the replica ID. Must be unique per replica, leave blank for random |
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| `--unsafe` | Enable this flag to skip safety checks when installing or joining |
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| `--existing-replica-id` | ID of an existing replica in a cluster |
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| `--replica-http-port` | Specify the public HTTP port for the DTR replica; 0 means unchanged/default |
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| `--replica-https-port` | Specify the public HTTPS port for the DTR replica; 0 means unchanged/default |
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| `--skip-network-test` | Enable this flag to skip the overlay networking test |
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| `--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 |
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