Client-directed placement of remotely-configured service instances

A system, comprising:

• one or more computing devices;
• wherein the one or more computing devices include instructions that upon execution on or across one or more processors cause the one or more computing devices to:
• determine, based at least in part on programmatic input from a client of a network-accessible service, that a service instance of the network-accessible service is to be established at a first facility, wherein the programmatic input indicates the first facility, wherein the first facility includes one or more instance hosts of the network-accessible service and does not include control servers of the network-accessible service, and wherein the one or more instance hosts at the first facility support instance configuration from one or more remote control servers;
• identify a remote control server at a second facility, located at a separate geographical location from the first facility, to initiate one or more configuration operations associated with the service instance at the first facility;
• and
• cause the remote control server at the second facility to issue one or more commands to an instance host at the first facility to remotely configure the service instance from the remote control server at the separate geographical location.

One or more non-transitory computer-accessible storage media storing program instructions that when executed on or across one or more processors cause one or more computer systems to:

• determine, based at least in part on programmatic input from a client of a network-accessible service, that a service instance of the network-accessible service is to be established at a first facility, wherein the programmatic input indicates the first facility, wherein the first facility includes one or more instance hosts of the network-accessible service and does not include control servers of the network-accessible service, and wherein the one or more instance hosts at the first facility support instance configuration from one or more remote control servers;
• identify a remote control server at a second facility, located at a separate geographical location from the first facility, to initiate one or more configuration operations associated with the service instance at the first facility;
• and
• cause the remote control server at the second facility to issue one or more commands to an instance host at the first facility to remotely configure the service instance from the remote control server at the separate geographical location.