Creating a new disk is the major latency cost of creating a
new instance. If we reuse a previous disk image, the VM and
CoreOS boot much quicker and start building again.
So add a mode where we don't mark the disk as delete-on-death
when we create it, and we search for a suitably-named existing
one on creation and try to reuse it.
It's a cache, essentially. It's still stateless.
LGTM=adg
R=adg
CC=golang-codereviews
https://golang.org/cl/135410043
Then make the coordinator and linux environment Makefiles have
an upload target. Amusingly, this actually worked: the Docker
images now tar + compress + upload over HTTP all in a stream,
without even knowing how large the resulting tar.gz will be until
it's done uploading.
LGTM=adg
R=adg
CC=golang-codereviews
https://golang.org/cl/140200043
Remove subversion & use newer version of the builder which
makes -verbose direct all.bash output to stdout/stderr.
LGTM=cmang
R=adg, cmang
CC=golang-codereviews
https://golang.org/cl/140910044
