Docker Trusted Registry system requirements
Estimated reading time: 2 minutesThis topic applies to Docker Enterprise.
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Docker Trusted Registry can be installed on-premises or on the cloud. Before installing, be sure your infrastructure has these requirements.
Hardware and Software requirements
You can install DTR on-premises or on a cloud provider. To install DTR, all nodes must:
- Be a worker node managed by UCP (Universal Control Plane). See Compatibility Matrix for version compatibility.
- Have a fixed hostname.
Minimum requirements
- 16GB of RAM for nodes running DTR
- 2 vCPUs for nodes running DTR
- 10GB of free disk space
Recommended production requirements
- 16GB of RAM for nodes running DTR
- 4 vCPUs for nodes running DTR
- 25-100GB of free disk space
Note that Windows container images are typically larger than Linux ones and for this reason, you should consider provisioning more local storage for Windows nodes and for DTR setups that will store Windows container images.
When image scanning feature is used, we recommend that you have at least 32 GB of RAM. As developers and teams push images into DTR, the repository grows over time so you should inspect RAM, CPU, and disk usage on DTR nodes and increase resources when resource saturation is observed on regular basis.
Ports used
When installing DTR on a node, make sure the following ports are open on that node:
| Direction | Port | Purpose |
|---|---|---|
| in | 80/tcp | Web app and API client access to DTR. |
| in | 443/tcp | Web app and API client access to DTR. |
These ports are configurable when installing DTR.
UCP Configuration
When installing or backing up DTR on a UCP cluster, Administrators need to be able to deploy containers on “UCP manager nodes or nodes running DTR”. This setting can be adjusted in the UCP Settings menu.
The DTR installation or backup will fail with the following error message if Administrators are unable to deploy on “UCP manager nodes or nodes running DTR”.
Error response from daemon: {"message":"could not find any nodes on which the container could be created"}
Compatibility and maintenance lifecycle
Docker Enterprise Edition is a software subscription that includes three products:
- Docker Enterprise Engine
- Docker Trusted Registry
- Docker Universal Control Plane
Learn more about the maintenance lifecycle for these products.