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This PR adds a new health_controller that takes care of marking which pods as replica, and which is master. This is done by listening to all pod events that include the dragonfly label, and then marking it either to be `master` or `replica` based on the current state. This PR also includes a `print-roles.go` helper CLI that essentially shows the pods along with their roles given a dragonfly instance.
This Commit adds `health_controller_test.go` that essentially tests for automatic fail-over of master if the pod goes down. It also verifies the same for replica's as pods are restarted.
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Still in draft. Will be rebased onto #2 once that is merged. |
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Closing in favour of #14 |
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DragonflyInstancetypeDragonFlyPod