CAP Multitenancy Connectivity

[jerinjacob]

Hi Experts,

I have developed a CAP NodeJS multi-tenant (based on SAP HANA Academy yeoman generator) app that require certain services from on-premise system. The app runs perfectly in multi-tenant mode when using destination service (via internet and uses basic authentication) to connect to external service. Now, I need to run the destination service with connectivity service. The on-prem system is added to the tenant subaccount's cloud connector, changed the destination service proxy type to 'on-premise', added connectivity service to mta.yaml file of app and linked it to the app-srv application(from which the external service is called). But unfortunately it raises an error as below:

'Error during request to remote service: Failed to load destination. Caused by: Failed to add proxy authorization header - client credentials grant failed! Caused by: Could not fetch client credentials token for service of type "connectivity". Caused by: Request failed with status code 401'

How can I solve this issue or am i missing something?

Many thanks,

Jerin Jacob

[sreehari_vpillai]

I am struggling to connect with another MTX CAPM service as destination -

Error : Failed to load destination. Caused by: Could not fetch client credentials token for service of type "destination" .

I subscribed to both caller and calling app from the same provider sub-account and it works there very well. When I subscribe these apps from another sub-account, there it just doesn't .
posted here : https://answers.sap.com/questions/13782742/consuming-a-multi-tenant-capm-api-from-another-mul.html

[gregorw · Accepted solution]

Please check my post: Documentation: Deploy SaaS Solutions (MTX) - Dependencies to Destination / Connectivity Service

[jerinjacob · Accepted solution]

Thanks Gregor, for the wonderful blog!

As the blog suggests, I had to add connectivity as a dependency to the 'srv' app. Also, I used a custom event handler for https://{consumer}-srv.${default-domain}/mtx/v1/provisioning/dependencies; and thus had to add connectivity's xsappname here :

service.on('dependencies', async (req) => {
        return [{
            'xsappname': services.dest.xsappname
        },
        {
            'xsappname': services.conn.xsappname
        }];
});

[gregorw · Accepted solution]

Are you not using the @sap/cap-mtx package? Then my code sample should have worked for you.