api

metalstack.cloud api

This is the API of metalstack.cloud.

Usage examples

Can be found in the examples folder.

Conventions

Method options provide an intuitve and declarative way of providing annotations to service methods. These are used for scoping api-methods, which are getting utilized for authentication, authorization, auditing and payment (mainly in interceptors).

Motivational Example

service IPService {
  // Get a ip
  rpc Get(IPServiceGetRequest) returns (IPServiceGetResponse) {
    option (project_roles) = PROJECT_ROLE_OWNER;
    option (project_roles) = PROJECT_ROLE_EDITOR;
    option (project_roles) = PROJECT_ROLE_VIEWER;
    option (auditing) = AUDITING_EXCLUDED;
  }
  // Allocate a ip
  rpc Allocate(IPServiceAllocateRequest) returns (IPServiceAllocateResponse) {
    option (project_roles) = PROJECT_ROLE_OWNER;
    option (project_roles) = PROJECT_ROLE_EDITOR;
    option (chargeable) = CHARGEABLE_TRUE;
  }
}

message IPServiceAllocateRequest {
  string project = 2 [(buf.validate.field).string = {
    min_len: 2
    max_len: 128
  }];
  string name = 3 [(buf.validate.field).string = {
    min_len: 2
    max_len: 128
  }];
  string description = 4 [(buf.validate.field).string = {max_len: 128}];
  repeated string tags = 8 [(buf.validate.field).repeated.max_items = 100];
  bool static = 9;
}

In this example we can see the motivation behind the method options.

1. Get: can be issued by project owner, editor, viewer and is excluded from auditing
2. Allocate: can be used by project owner, editor and is an service-method which requires deposited payment information
3. Both methods are project-scoped, since they are annotated by a project role -> Request object needs to have the project field in order to specify the target project of the service method

Further explanations are explained in the following:

Auth

These options specify the RBAC of the api-endpoint.

[!IMPORTANT]

Every operation needs at least an option, which references the scope of the request: ROLE or VISIBILITY

[!CAUTION]

If we use a Tenant or Project role, the request will be respectively scoped as Tenant or Project request. Tenant-Requests must have the field login, which is the tenant id and specifies the tenant on which the service-method is scoped. Project-Requests must have the field project, which is the project id and specifies the project on which the service-method is scoped.

Payment

Some api-methods are associated with payment and will result in costs. In order to use these kind of operations the user must have deposited its payment information. If the payment information are not deposited the user is not allowed to issue these actions.

Auditing

For traceability we require to store audit-logs.