aws-gov can't read cloud streams file

[Kenaniah]

When attempting to bootstrap a controller in the aws-gov cloud, the command fails stating that image metadata could not be read. My initial guess is that this is due to "aws-gov" being referenced as "aws-govcloud" with AWS GovCloud's old endpoints in the cloud streams file located at http://cloud-images.ubuntu.com/releases/streams/v1/index.sjson.

```
juju bootstrap --debug aws-gov
```
```
21:06:18 DEBUG juju.environs.bootstrap bootstrap.go:617 constraints for image metadata lookup &{{{us-gov-west-1 https://ec2.us-gov-west-1.amazonaws.com} [trusty vivid zesty win2012hv win2012r2 win81 cosmic win2016nano xenial win2012hvr2 raring wily yakkety win2016 opensuseleap quantal utopic win2012 win8 precise win7 centos7 genericlinux saucy artful bionic win2008r2 win2016hv win10] [amd64 i386 armhf arm64 ppc64el s390x] released}}
21:06:20 DEBUG juju.environs.bootstrap bootstrap.go:629 found 0 image metadata in default cloud images
21:06:21 DEBUG juju.environs.simplestreams simplestreams.go:457 skipping index "http://cloud-images.ubuntu.com/releases/streams/v1/index.sjson" because of missing information: index file has no data for cloud {us-gov-west-1 https://ec2.us-gov-west-1.amazonaws.com} not found
21:06:21 DEBUG juju.environs.bootstrap bootstrap.go:625 ignoring image metadata in default ubuntu cloud images: index file has no data for cloud {us-gov-west-1 https://ec2.us-gov-west-1.amazonaws.com} not found
21:06:21 DEBUG juju.environs.bootstrap bootstrap.go:633 found 0 image metadata from all image data sources
21:06:21 ERROR juju.cmd.juju.commands bootstrap.go:538 failed to bootstrap model: no image metadata found
21:06:21 DEBUG juju.cmd.juju.commands bootstrap.go:539 (error details: [{github.com/juju/juju/cmd/juju/commands/bootstrap.go:636: failed to bootstrap model} {github.com/juju/juju/environs/bootstrap/bootstrap.go:242: } {github.com/juju/juju/environs/bootstrap/bootstrap.go:635: no image metadata found}])
21:06:21 DEBUG juju.cmd.juju.commands bootstrap.go:1142 cleaning up after failed bootstrap
```

[Richard Harding (rharding)]

I agree I can't read the urls provided. In the docs it looks like

    https://docs.aws.amazon.com/govcloud-us/latest/UserGuide/using-govcloud-endpoints.html

says to use

     ec2.us-gov-west-1.amazonaws.com

where we've got

    ec2.us-gov-west-1.amazonaws-govcloud.com

in the streams.

I've added the cloud-images team to help investigate the right setup.

[Anastasia (anastasia-macmood)]

"juju-core" is only used for Juju 1.x. Moving this over to "juju" which tracks Juju 2.x

[Francis Ginther (fginther)]

The streams are now using the correct endpoints:

https://ec2.us-gov-west-1.amazonaws.com
https://ec2.us-gov-east-1.amazonaws.com

[Canonical Juju QA Bot (juju-qa-bot)]

This bug has not been updated in 2 years, so we're marking it Low importance. If you believe this is incorrect, please update the importance.