mirror of
https://github.com/oceanprotocol/docs.git
synced 2024-11-26 19:49:26 +01:00
76 lines
3.9 KiB
Markdown
76 lines
3.9 KiB
Markdown
---
|
|
title: Compute-to-Data
|
|
description: Architecture overview
|
|
---
|
|
|
|
# Architecture
|
|
|
|
### Architecture Overview
|
|
|
|
Here's the sequence diagram for starting a new compute job.
|
|
|
|
|
|
|
|
The Consumer calls the Provider with `start(did, algorithm, additionalDIDs)`. It returns job id `XXXX`. The Provider oversees the rest of the work. At any point, the Consumer can query the Provider for the job status via `getJobDetails(XXXX)`.
|
|
|
|
Here's how Provider works. First, it ensures that the Consumer has sent the appropriate datatokens to get access. Then, it calls asks the Operator-Service (a microservice) to start the job, which passes on the request to Operator-Engine (the actual compute system). Operator-Engine runs Kubernetes compute jobs etc as needed. Operator-Engine reports when to Operator-Service when the job has finished.
|
|
|
|
Here's the actors/components:
|
|
|
|
* Consumers - The end users who need to use some computing services offered by the same Publisher as the data Publisher.
|
|
* Operator-Service - Micro-service that is handling the compute requests.
|
|
* Operator-Engine - The computing systems where the compute will be executed.
|
|
* Kubernetes - a K8 cluster
|
|
|
|
Before the flow can begin, these pre-conditions must be met:
|
|
|
|
* The Asset DDO has a `compute` service.
|
|
* The Asset DDO compute service must permit algorithms to run on it.
|
|
* The Asset DDO must specify an Ocean Provider endpoint exposed by the Publisher.
|
|
|
|
### Access Control using Ocean Provider
|
|
|
|
As with [the `access` service](broken-reference), the `compute` service requires the **Ocean Provider** as a component handled by Publishers. Ocean Provider is in charge of interacting with users and managing the basics of a Publisher's infrastructure to integrate this infrastructure into Ocean Protocol. The direct interaction with the infrastructure where the data resides happens through this component only.
|
|
|
|
Ocean Provider includes the credentials to interact with the infrastructure (initially in cloud providers, but it could be on-premise).
|
|
|
|
### Compute-to-Data Environment
|
|
|
|
#### Operator Service
|
|
|
|
The **Operator Service** is a micro-service in charge of managing the workflow executing requests.
|
|
|
|
The main responsibilities are:
|
|
|
|
* Expose an HTTP API allowing for the execution of data access and compute endpoints.
|
|
* Interact with the infrastructure (cloud/on-premise) using the Publisher's credentials.
|
|
* Start/stop/execute computing instances with the algorithms provided by users.
|
|
* Retrieve the logs generated during executions.
|
|
|
|
Typically the Operator Service is integrated from Ocean Provider, but can be called independently of it.
|
|
|
|
The Operator Service is in charge of establishing the communication with the K8s cluster, allowing it to:
|
|
|
|
* Register new compute jobs
|
|
* List the current compute jobs
|
|
* Get a detailed result for a given job
|
|
* Stop a running job
|
|
|
|
The Operator Service doesn't provide any storage capability, all the state is stored directly in the K8s cluster.
|
|
|
|
#### Operator Engine
|
|
|
|
The **Operator Engine** is in charge of orchestrating the compute infrastructure using Kubernetes as backend where each compute job runs in an isolated [Kubernetes Pod](https://kubernetes.io/docs/concepts/workloads/pods/). Typically the Operator Engine retrieves the workflows created by the Operator Service in Kubernetes, and manage the infrastructure necessary to complete the execution of the compute workflows.
|
|
|
|
The Operator Engine is in charge of retrieving all the workflows registered in a K8s cluster, allowing to:
|
|
|
|
* Orchestrate the flow of the execution
|
|
* Start the configuration pod in charge of download the workflow dependencies (datasets and algorithms)
|
|
* Start the pod including the algorithm to execute
|
|
* Start the publishing pod that publish the new assets created in the Ocean Protocol network.
|
|
* The Operator Engine doesn't provide any storage capability, all the state is stored directly in the K8s cluster.
|
|
|
|
#### Pod: Configuration
|
|
|
|
#### Pod: Publishing
|