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Add docs to use one controller on Google Cloud

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Dalton Hubble 2017-11-07 19:40:44 -08:00
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docs/google-cloud.md
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@ -233,6 +233,9 @@ resource "google_dns_managed_zone" "zone-for-clusters" {
Check the list of valid [machine types](https://cloud.google.com/compute/docs/machine-types).
!!! warning
Set controller_count to 1. A bug in Google Cloud network load balancer health checking prevents multiple controllers from bootstrapping. There are workarounds, but they all involve tradeoffs we're uncomfortable recommending. See [#54](https://github.com/poseidon/typhoon/issues/54).
#### Preemption
Add `worker_preemeptible = "true"` to allow worker nodes to be [preempted](https://cloud.google.com/compute/docs/instances/preemptible) at random, but pay [significantly](https://cloud.google.com/compute/pricing) less. Clusters tolerate stopping instances fairly well (reschedules pods, but cannot drain) and preemption provides a nice reward for running fault-tolerant cluster systems.`