DNS resolution of overlapping domains in a multi-tenant computing environment

A method for a multi-tenant DNS mechanism comprising:

• a processor of a computer system receiving a DNS request to resolve a domain address to an Internet Protocol address,
• where the domain address identifies a networked entity comprised by a multi-tenant computing environment,
• where the DNS request comprises a Tenant-ID record that indicates whether the DNS request comprises a request for a tenant-specific domain-name resolution, and where the multi-tenant computing environment comprises a set of private networks that each host one tenant's domain of a set of tenant domains;
• the processor extracting the Tenant-ID record from the DNS request;
• the processor determining whether the Tenant-ID record indicates that the DNS request comprises a request for a tenant-specific domain-address resolution;
• and
• the processor forwarding the DNS request to a multi-tenant DNS server along with a notification of whether the DNS request requires a tenant-specific domain-address resolution.

A computer program product, comprising a computer-readable hardware storage device having a computer-readable program code stored therein, the program code configured to be executed by a DNS-resolution system comprising a processor, a memory coupled to the processor, and a computer-readable hardware storage device coupled to the processor, the storage device containing program code configured to be run by the processor via the memory to implement a method for a multi-tenant DNS mechanism, the method comprising:

• receiving a DNS request to resolve a domain address to an Internet Protocol address,
• where the domain address identifies a networked entity comprised by a multi-tenant computing environment,
• where the DNS request comprises a Tenant-ID record that indicates whether the DNS request comprises a request for a tenant-specific domain-name resolution, and
• where the multi-tenant computing environment comprises a set of private networks that each host one tenant's domain of a set of tenant domains;
• extracting the Tenant-ID record from the DNS request;
• determining whether the Tenant-ID record indicates that the DNS request comprises a request for a tenant-specific domain-address resolution;
• and
• forwarding the DNS request to a multi-tenant DNS server along with a notification of whether the DNS request requires a tenant-specific domain-address resolution.