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* Introduce TLS Settings for go-micro based grpc services and clients TLS for the services can be configure by setting the OCIS_MICRO_GRPC_TLS_ENABLED" "OCIS_MICRO_GRPC_TLS_CERTIFICATE" and "OCIS_MICRO_GRPC_TLS_KEY" enviroment variables. TLS for the clients can configured by setting the "OCIS_MICRO_GRPC_CLIENT_TLS_MODE" and "OCIS_MICRO_GRPC_CLIENT_TLS_CACERT" variables. By default TLS is disabled. Co-authored-by: Martin <github@diemattels.at> * Unify TLS configuration for all grpc services All grpc service (whether they're based on reva) or go-micro use the same set of config vars now. TLS for the services can be configure by setting the OCIS_GRPC_TLS_ENABLED, OCIS_GRPC_TLS_CERTIFICATE and OCIS_GRPC_TLS_KEY enviroment variables. TLS for the clients can configured by setting the OCIS_GRPC_CLIENT_TLS_MODE and OCIS_MICRO_GRPC_CLIENT_TLS_CACERT variables. There are no individual per service config vars currently. If really needed, per service tls configurations can be specified via config file. Co-authored-by: Martin <github@diemattels.at> Co-authored-by: Martin <github@diemattels.at>
Frontend Service
The frontend service translates various owncloud related HTTP APIs to CS3 requests.
Endpoints Overview
Currently, the frontend service handles requests for three functionalities, which are appprovider, archiver, datagateway and ocs.
appprovider
The appprovider endpoint, by default /app, forwards HTTP requests to the CS3 App Registry API
archiver
The archiver endpoint, by default /archiver, implements zip and tar download for collections of files. It will internally use the CS3 API to initiate downloads and then stream the individual files as part of a compressed file.
datagateway
The datagateway endpoint, by default /data, forwards file up- and download requests to the correct CS3 data provider. OCIS starts a dataprovider as part of the storage-* services. The routing happens based on the JWT that was created by a storage provider in response to an InitiateFileDownload or InitiateFileUpload request.
ocs
The ocs endpoint, by default /ocs, implements the ownCloud 10 Open Collaboration Services API by translating it into CS3 API requests. It can handle users, groups, capabilities and also implements the files sharing functionality on top of CS3. The /ocs/v[12].php/cloud/user/signing-key is currently handled by the dedicated ocs service.
Scalability
While the frontend service does not persist any data it does cache Stat() responses and user information. Therefore, multiple instances of this service can be spawned in a bigger deployment like when using container orchestration with Kubernetes, when configuring FRONTEND_OCS_RESOURCE_INFO_CACHE_TYPE=redis and the related config options.