"Are you sure you want to continue connecting?" prompt blocks my CI runs

[drnic]

See https://travis-ci.org/drnic/bosh-inception/jobs/7058140#L179

Any thoughts on what we can do in knife-solo to auto-answer this, or have it never asked in the first place?

It seems weird - there have been ssh calls into this VM already; not sure why the "Uploading the kitchen..." stage results in this ssh check.

Ideas?

[matschaffer]

Kitchen upload shells out to rsync (which calls ssh). That's likely where the prompt is coming from. It's interesting that I don't tend to run into this in our own integration tests though. I may have had host key checking turned off for EC2 globally.

I'll try to dig a bit. @tmatilai might also have some thoughts.

[tmatilai]

Ah yeah, I have also configured ssh to not verify EC2 hosts. Net::SSH has that off by default. I guess we should make it configurable for knife-solo and then pass the same setting to both Net::SSH and rsync. Or at least disable the check now from rsync?

@drnic As a workaround, you should be able to make an SSH config file in your repo with something like this:

Host *.compute*.amazonaws.com # or just `*`
  StrictHostKeyChecking no
  UserKnownHostsFile /dev/null

...and then pass that with --ssh-config-file/-F to knife-solo commands.

[drnic]

Thank you very mcuh @tmatilai & @matschaffer for the ideas!