Automatic tools-upload/sync during bootstrap

[Ian Booth]

> 
> So I'd like to see what people think of this:
>  - Keep "juju bootstrap --upload-tools", but make that the only time we
> attempt to upload during "juju bootstrap". There will not be any automatic
> upload if tools aren't found and syncing fails.

The auto upload was added to avoid the less than user friendly scenario whereby
people running from source could not bootstrap without specifying
--upload-tools. My opinion is that the current functionaility is waranted
because it makes bootstrap Just Work and removes a common failure path. It also
unifies the bootstrap command for dev vs prod and consistency is good.

>  - Remove the option to specify a tools source. If you really want to do
> that, use juju sync-tools.
> 

You mean tools-url in config? We need this to allow private clouds (and anyone
else) to serve the tools using an arbitary http server (or from a shared
directory). In any case, sync-tools only copies to the private storage (for ec2
and openstack at least)  and such tools are not generally available to anyone
else. The tools-url is intended to be configured with a shared public location
from which  to get tools. So for the above reasons, we need to keep this option.