zyga@fyke:~/go/src/github.com/snapcore/snapd$ spread -v -debug -reuse external:ubuntu-core-16-arm-32:tests/main/ubuntu-core-upgrade 
2017-10-13 10:43:41 Found /home/zyga/go/src/github.com/snapcore/snapd/spread.yaml.
2017-10-13 10:43:43 Project content is packed for delivery (1.78MB).
2017-10-13 10:43:43 Allocating external:ubuntu-core-16-arm-32...
2017-10-13 10:43:43 Waiting for external:ubuntu-core-16-arm-32 to make SSH available at 192.168.3.108:22...
2017-10-13 10:43:43 Allocated external:ubuntu-core-16-arm-32.
2017-10-13 10:43:43 Connecting to external:ubuntu-core-16-arm-32...
2017-10-13 10:43:44 Connected to external:ubuntu-core-16-arm-32 at 192.168.3.108:22.
2017-10-13 10:43:44 Sending project content to external:ubuntu-core-16-arm-32...
2017-10-13 10:43:45 Preparing project on external:ubuntu-core-16-arm-32...
2017-10-13 10:46:02 Preparing external:ubuntu-core-16-arm-32:tests/main/...
2017-10-13 10:49:01 Preparing external:ubuntu-core-16-arm-32:tests/main/ubuntu-core-upgrade...
2017-10-13 10:51:08 Executing external:ubuntu-core-16-arm-32:tests/main/ubuntu-core-upgrade (1/1)...
2017-10-13 10:53:00 Rebooting external:ubuntu-core-16-arm-32 as requested...
2017-10-13 10:55:19 Rebooting external:ubuntu-core-16-arm-32 as requested...
2017-10-13 10:58:04 Rebooting external:ubuntu-core-16-arm-32 as requested...
2017-10-13 11:00:28 Rebooting external:ubuntu-core-16-arm-32 as requested...
2017-10-13 11:01:45 Restoring external:ubuntu-core-16-arm-32:tests/main/ubuntu-core-upgrade...
2017-10-13 11:01:46 Restoring external:ubuntu-core-16-arm-32:tests/main/...
2017-10-13 11:04:13 Restoring project on external:ubuntu-core-16-arm-32...
2017-10-13 11:04:31 Successful tasks: 1
2017-10-13 11:04:31 Aborted tasks: 0
2017-10-13 11:04:31 Keeping external:ubuntu-core-16-arm-32 at 192.168.3.108:22