tree 2997d7c0103a57ec7717a64251c19cf9833afb72
parent 86757ddb63cf0fb2ff4f3b002b492c4b0544dba8
author Evan Brown <evanbrown@google.com> 1455691167 -0800
committer Brad Fitzpatrick <bradfitz@golang.org> 1460049777 +0000

all: kubernetes builder autoscaling

Improvements to support rapid scheduling of many build jobs:

- Retry logic in Kubernetes client to handle sporadic connection
  closes from their API server under heavy load

- Cluster autoscaler scales on default CPU utilization metric

- Debug mode allows scheduling multiple builds to test scaling

- Account for scheduled vs. provisioned resources in a cluster
  and use that information to estimate when a build's pod
  will be scheduled and in running state

- Use estimated scheduled time to set context timeout

- Track pod lifecycle (requested time, estimated available time,
  actual available time, terminate time, etc)

Change-Id: I14d6c5e01af0970dbb3390a29d1ee5c43049fff8
Reviewed-on: https://go-review.googlesource.com/19524
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>