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42 lines
1.7 KiB
Markdown
42 lines
1.7 KiB
Markdown
---
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title: docker/dtr join
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keywords: docker, dtr, cli, join
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description: Add a new replica to an existing DTR cluster
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---
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Add a new replica to an existing DTR cluster
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## Description
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This command creates a replica of an existing DTR on a node managed by
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Docker Universal Control Plane (UCP).
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For setting DTR for high-availability, create 3, 5, or 7 replicas of DTR.
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## Options
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| Option | Description |
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|:--------------------------|:---------------------------|
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|`--debug`|Enable debug mode for additional logging|
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|`--existing-replica-id`|The ID of an existing DTR replica|
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|`--extra-envs`|Environment variables or swarm constraints for DTR containers. Format var=val[&var=val]|
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|`--hub-password`|Password to use when pulling images|
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|`--hub-username`|Username to use when pulling images|
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|`--replica-http-port`|The public HTTP port for the DTR replica. Default is 80|
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|`--replica-https-port`|The public HTTPS port for the DTR replica. Default is 443|
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|`--replica-id`|Assign an ID to the DTR replica. By default the ID is random|
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|`--skip-network-test`|Don't test if overlay networks are working correctly between UCP nodes|
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|`--ucp-ca`|Use a PEM-encoded TLS CA certificate for UCP|
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|`--ucp-insecure-tls`|Disable TLS verification for UCP|
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|`--ucp-node`|The hostname of the target UCP node. Set to empty string or "_random_" to pick one at random.|
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|`--ucp-password`|The UCP administrator password|
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|`--ucp-url`|The UCP URL including domain and port|
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|`--ucp-username`|The UCP administrator username|
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|`--unsafe`|Allow DTR to be installed on any engine version|
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|`--unsafe-join`|Perform the join despite the cluster containing unhealthy replicas.|
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