restore consistently fails

[Curtis Hovey]

Restore is consistently failing
    http://juju-ci.vapour.ws:8080/view/Juju%20Revisions/job/functional-backup-restore/
    http://juju-ci.vapour.ws:8080/view/Juju%20Revisions/job/functional-ha-backup-restore/

These tests were broken at the same time all the upgrade tests began failing, but these tests continue to fail after a fix was landed. The call to juju restore fails with this as the only message:

2014-10-29 09:16:58 INFO juju.cmd supercommand.go:37 running juju [1.21-alpha3-precise-amd64 gc]
Bootstrapping environment "test-function-hp-3"
Starting new instance for initial state server
Launching instance
 - 4d3345fe-b091-4fb3-9065-8f5c01eedb34
Installing Juju agent on bootstrap instance
Waiting for address
Attempting to connect to 15.125.94.249:22
Attempting to connect to 10.0.0.27:22
Warning: Permanently added '15.125.94.249' (ECDSA) to the list of known hosts.
sudo: unable to resolve host juju-test-function-hp-3-machine-0
Logging to /var/log/cloud-init-output.log on remote host
Running apt-get update
Running apt-get upgrade
Installing package: curl
Installing package: cpu-checker
Installing package: bridge-utils
Installing package: rsyslog-gnutls
Fetching tools: curl -sSfw 'tools from %{url_effective} downloaded: HTTP %{http_code}; time %{time_total}s; size %{size_download} bytes; speed %{speed_download} bytes/s ' --retry 10 -o $bin/tools.tar.gz <[https://region-a.geo-1.objects.hpcloudsvc.com/v1/60502529753910/juju-dist/testing/tools/releases/juju-1.21-alpha3-trusty-amd64.tgz]>
Bootstrapping Juju machine agent
Starting Juju machine agent (jujud-machine-0)
Bootstrap complete
error: cannot connect to api server: unable to connect to "wss://10.0.0.27:17070/"
2014-10-29 09:39:10 ERROR juju.cmd supercommand.go:323 subprocess encountered error code 1

[Horacio Durán (hduran-8)]

This is caused by https://github.com/juju/juju/commit/b582fe14b05cce1fcd2ad757c97382b2b2bda01e this commit changed the structure of the machine document and therefore one of the restore steps (updating machine document to hold new intance) was broken.