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Documentation Index

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Techulus Cloud runs a private Docker Distribution Registry for storing container images built from source.

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How It Works

When you deploy from a GitHub repository, an agent builds the container image using BuildKit and pushes it to the registry. Other agents pull the image from the registry during deployment. Images are tagged with the commit SHA: 
registry.example.com/{project_id}/{service_id}:{commit_sha}

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Configuration

The registry runs as a Docker container alongside the control plane, available at https://registry.<ROOT_DOMAIN>.
VariableDescription
REGISTRY_USERNAMEBasic auth username
REGISTRY_PASSWORDBasic auth password
REGISTRY_HTTP_SECRETInternal HTTP signing secret
Agents receive registry credentials automatically during registration.

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Storage

Images are stored on the local filesystem in a persistent Docker volume (registry-data). Delete operations are enabled for garbage collection.

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Garbage Collection

To reclaim disk space from deleted images, run garbage collection manually: 
docker exec registry /bin/registry garbage-collect /etc/docker/registry/config.yml
For automatic cleanup, add a daily cron job: 
0 2 * * * docker exec registry /bin/registry garbage-collect /etc/docker/registry/config.yml