how to create service groups in wso2 DSS server - wso2-data-services-server

I need to create a several services . I found we can create one query service easily.
how to create service groups in WSO2 DSS server?

please try to use use below example.
Example

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Cosmosdb SQL how to list all containers?

How to list all containers here? I wanna use it in the "lookup" activity of Azure Data Factory.
#Kyaka, It is not possible to list the containers using Lookup activity in Azure Data Factory as CosmosDB linked service needs a collection name to be passed. You may try to call the REST endpoint - https://{databaseaccount}.documents.azure.com/dbs/{db-id}/colls from an Azure Function and use Azure Function Activity to get collections list.
You can also check for other alternatives of calling REST API from ADF like Web Activity based on your requirements.
Please refer to the documentation List Collections for details.
Thanks

How to add Azure custom Policy for Azure Data Factory to only use Azure Key Vault during the Linked Service Creation?

How to add Azure custom Policy for Azure Data Factory to only use Azure Key Vault during the Linked Service Creation for fetching the Data Store Credentials instead of credentials being put up directly in ADF Linked Service. Please suggest ARM or PowerShell methods for the policy implementation.
As of yesterday, the Data Factory Azure Policy integration is available which means you can now find some built-in policies that can be assigned to ADF.
One of those is exactly what you're asking for as you can see in the image below. You can find more information here
Edit: Based on your comment, I'm editing this answer with the info you want. When it comes to custom policies, it's pretty much up to you to come up with them and create what fits your needs. In your particular case, I've created one policy that does what you want, please see here.
This policy will audit your data factory linked services and check if they're using a self-hosted integration runtime. Currently, that check is only done for a few types of integration runtimes (if you look at the policy, you can see 5 of them) which means that if you want to check more types of linked services, you'll need to add them to the list of allowed values and select them when assigning the policy definition.
Bear in mind that for some linked services types, such as Key Vault, that check won't make sense since that service can't use a self-hosted IR

Cross-account DynamoDB access

I want to migrate data from DynamoDB from one AWS account to another. Could you please advise whether it is possible using AWS Data Pipeline? Otherwise, what are other options to do this?
I have tried migrating data within the account using Data Pipeline using HiveCopyActivity. But require more details/info how it can be done across accounts.
Yes, you can use Data Pipeline:
https://docs.aws.amazon.com/datapipeline/latest/DeveloperGuide/dp-importexport-ddb.html
For cross account, you need to share S3 in source account to another account

How to expose the data service using wso2ei

I am new to this area, can anyone please help me on this. Below is my requirement.
I have a data source and i want to access those data through REST service, i have created a data source and its giving response when executing as CURL command. Further what i want to do is need to expose that as REST service in WSO2EI and the endpoint have to be configured/publish in wso2 API manager.
Please guide me on the flow how to achieve this, I have tried my best but i couldn't make much progress.
Thanks in advance.
You can create DSS REST services by creating ODATA service [1]. If you are using ODATA, you do not need to manually define CURD operations. DSS server will automatically map RDBMS database with CURD operations.
Otherwise you can create custom REST service with Data services as it described in here[2]. Here you can define a REST service along with the SQL query that need to execute for particular request.
I found this blog[3] that contain instruction to expose Data service with WSO2 API manager with an example. This example generate ODATA service with WSO2EI and expose as managed API with WSO2 API manager as following diagram.
https://docs.wso2.com/display/EI640/Exposing+Data+as+an+OData+Service
https://docs.wso2.com/display/EI640/Exposing+a+Datasource+as+a+Data+Service
https://medium.com/wso2-learning/how-to-expose-your-database-as-a-managed-api-with-wso2-in-10-minutes-c9ac2595738b

Integrate Orion with a DBaaS like TROVE (Openstack)

i've developed a E2E application using some FIWARE GE. In particular i used IDAS and ORION. My question is: Can i store orion data in an external db in order to do query SQL or integrate Orion with TROVE?
Thanks in advance.
Orion can be accessed through a REST API to produce (create/upate) or consume (queries and asyncronous notifications) context information, based in an entity/attribute data model. See details in the Orion documentation manual.
Aas long as you can use that API from your application with that REST API, then you could integrate Orion.

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