etcd-operator-code.txt

Deployment
https://github.com/coreos/etcd-operator/blob/master/example/deployment.yaml

TPR creation:
https://github.com/coreos/etcd-operator/blob/master/pkg/controller/controller.go#L243

ReplicaSets used for backups:
https://github.com/coreos/etcd-operator/blob/master/pkg/cluster/backup_manager.go#L90
https://github.com/coreos/etcd-operator/blob/master/pkg/util/k8sutil/backup.go#L165

Observe, Analyse, Act (part of #3):
https://github.com/coreos/etcd-operator/blob/master/pkg/cluster/cluster.go#L216
https://github.com/coreos/etcd-operator/blob/master/pkg/cluster/cluster.go#L265

Chaos monkey style tests:
https://github.com/coreos/etcd-operator/blob/master/pkg/chaos/chaos.go
https://github.com/coreos/etcd-operator/blob/master/cmd/operator/main.go#L201