Attachment and detachment of compute instances owned by different tenancies

A non-transitory computer-readable storage medium, storing computer-executable instructions that, when executed, cause one or more processors of a computer system to perform a method comprising:

• receiving a request to create an attachment between a first compute instance of a first service and a second compute instance of a second service, where the first compute instance is controlled by a first control plane of the computer system, the second compute instance is controlled by a second control plane, the first compute instance is within a customer tenancy, the second compute instance is within the customer tenancy, and the first compute instance is isolated from the second compute instance within the customer tenancy;
• executing a set of processing steps to create the attachment between the first compute instance and the second compute instance;
• and
• after executing the set of processing steps and due to the attachment, gaining control of the second compute instance and enabling communication between the first compute instance and the second compute instance.

A computer system comprising:

• a processor;
• and
• a memory configured to store a plurality or instructions executable by the processor and upon execution by the processor to cause processing to be performed comprising:
• receiving a request to create an attachment between a first compute instance of a first service and a second compute instance of a second service, where the first compute instance is controlled by the first control plane of the computer system, the second compute instance is controlled by a second control plane, the first compute instance is within a customer tenancy, the second compute instance is within the customer tenancy, and the first compute instance is isolated from the second compute instance within the customer tenancy;
• executing a set of processing steps to create the attachment between the first compute instance and the second compute instance;
• and
• after executing the set of processing steps and due to the attachment, gaining control of the second compute instance and enabling communication between the first compute instance and the second compute instance.