Updates golang/go#12546

Change-Id: Ia70baeb1df441509f70c77e7b94e7eb9fddccbf3
Reviewed-on: https://go-review.googlesource.com/14392
Reviewed-by: Evan Brown <evanbrown@google.com>

Updates golang/go#12546

Change-Id: Iac31c237fed7973ec2bebace5248904fe3e3692d
Reviewed-on: https://go-review.googlesource.com/14396
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>

Find the default Kubernetes cluster and configure a client to talk to it.
Use application default credentials.

Updates golang/go#12546

Change-Id: Ifb1ce57f52f4fbbee3267f8cc3cf02a78146bd5b
Reviewed-on: https://go-review.googlesource.com/14532
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>

* set correct metadata as env vars on each container in pod

* stage0 detects when running in a pod

* add scope to support farmer on GCE communicating with Google
  Container Engine API

* dev mode supports GCE and Kubernetes even when not running
  on GCE

* pod buildlet returns a configured http.Client

* pod buildlets work, but pods are not removed after completion
  (or on creation failure)

Updates golang/go#12546

Change-Id: If91673b49223130c1e7077c130f1abe1e7966d02
Reviewed-on: https://go-review.googlesource.com/15041
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>

Updates golang/go#12546

Change-Id: Icaa0504791522837fcbf0256b144c13158777c6e
Reviewed-on: https://go-review.googlesource.com/15258
Reviewed-by: Andrew Gerrand <adg@golang.org>

* Replaced cancel with context.Context
* StartPod can be canceled
* Wait for buildlet to come online, but fail fast if pod fails first
* Support timeout waiting for pod to leave pending phase
* Use Kubernetes watch API (long poll)

Updates golang/go#12546

Change-Id: I792a3b8fed615362a0290feee7de0c2cefe43c0e
Reviewed-on: https://go-review.googlesource.com/15285
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>

* status page shows kube pool details
* pods created by the coorindator are tracked
* pods that fail to create are deleted
* pods older than delete-at are deleted
* pods created by a different coordinator are deleted

Updates golang/go#12546

Change-Id: I4c4f8ff906962b4a014a66d0a9d490ff17710d62
Reviewed-on: https://go-review.googlesource.com/16101
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>

* pod creation returns an *api.Pod
* WatchPod replaces WatchPodStatus

Updates golang/go#12546

Change-Id: I34bb6e0d994e552b41a8082cc4672a663ce961a3
Reviewed-on: https://go-review.googlesource.com/17100
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>

* flag allows debug (trigger a build) in prod mode
* use default zone (us-central1-f) in staging
* compute.CloudPlatformScope satisfies compute and storage scope
  requirements
* new buildlet for linux-amd64 on Kubernetes

Updates golang/go#12546

Change-Id: I1a0cbc0e0c0552b7ac56943c646378194508d48f
Reviewed-on: https://go-review.googlesource.com/17102
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>

* if Kubernetes init fails, don't attempt to clean existing pods
* TODOs for disabling kubePool

Updates golang/go#12546

Change-Id: I392f6cc4af31fdf307e5aa907a243ff7f5a98b00
Reviewed-on: https://go-review.googlesource.com/17104
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>

* Buildlets cluster can be created using buildongce program
* Deployment Manager builds cluster and autoscaler
* Describe the environments a build system can be deployed to
* Merges https://golang.org/cl/17827

Updates golang/go#12546

Change-Id: Icac4efab2e9e72932c66f56da319e4d51326455a
Reviewed-on: https://go-review.googlesource.com/17334
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>