apiserver/provisioner/provsioner.go:1139 - inside ProvisionerAPI.prepareAllocationNetwork calls environ.Subnets with an instance Id. For ec2 calling Subnets with anything other than instance.UnknownId is an error. provider/ec2/environ.go:1002 returns the "instId not supported" error.
So this code has never actually been tried with ec2. :-(
apiserver/ provisioner/ provsioner. go:1139 - inside ProvisionerAPI. prepareAllocati onNetwork calls environ.Subnets with an instance Id. For ec2 calling Subnets with anything other than instance.UnknownId is an error. provider/ ec2/environ. go:1002 returns the "instId not supported" error.
So this code has never actually been tried with ec2. :-(