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This isn't used yet, but will be for the new-style builders (VMs on GCE running the buildlet, started by the coordinator). From the code's comments: cleanUpOldVMs periodically enumerates virtual machines and deletes any which have a "delete-at" attribute having a unix timestamp before the current time. These VMs are created to run a single build and should be shut down by a controlling process. Due to various types of failures, they might get stranded. To prevent them from getting stranded and wasting resources forever, we instead set the "delete-at" metadata attribute on them when created to some time that's well beyond their expected lifetime, and then this is the backup mechanism to delete them if they get away. Update golang/go#8639 Update golang/go#8640 Update golang/go#8642 Change-Id: I489e97926e7ab56487571c2bf0bd255cdf49570d Reviewed-on: https://go-review.googlesource.com/2199 Reviewed-by: Burcu Dogan <jbd@google.com> |
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