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oz-worker

oz-worker is a component of Onedata distributed data management platform, which serves as a worker process of Onezone service. Onezone service requires at least one oz-worker instance. Adding more oz-worker nodes scales the cluster allowing for processing more requests in parallel. oz-worker instances are coordinated by cluster-manager process, which should be deployed at least in one instance per entire cluster. Adding cluster-manager nodes increases fault tolerance of the Onezone service.

oz-worker is a specialization of generic Onedata worker process cluster-worker. The cluster-worker provides generic funcitonalities such as persistence and cluster management, while oz-worker augments it with its specific logic.

The main objective of oz-worker is to provide logic for coordinating the Oneprovider instances. Onezone acts as an intermediary in a network of cooperating Oneproviders. It stores metadata of system entites, i.e. users, groups, spaces and providers, manages relations between them and informs all oneproviders about any changes that are in their region of interest.

Using

oz-worker is an internal component of Onezone service and it should only be started as part of its deployment.

Dependencies

  • docker client > 1.10
  • python >= 2.7

Building

To build oz-worker make sure submodules are initialized and use the provided build script:

make submodules
./make.py

Configuration and Running

oz-worker can be started using bamboo scripts that are included in the repository. From the root of oz-worker project, run:

./bamboos/docker/zone_up.py bamboos/example_env/example_env.json

As oz-worker won't work without cluster_manager, both those applications will be started and connected into a small cluster. The section "zone_domains" in the JSON file defines all instances of onezone clusters that should be started and allows for basic configuration.

After the script has finished, you should have a running, dockerized onezone instance. Enter the graphical user interface on https://.

APIs

oz-worker has an exhaustive REST API for Oneproviders. Requests are authorized based on oneprovider certificates that are sent with every request. The API allows for CRUD operations on users, spaces, groups and providers. The matching client in Erlang is included in ctool repository, and is directly used by oneproviders.

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