Support ScaleRequest message, to allow vm-monitor to control autoscaling #980
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The new protocol message allows the vm-monitor to directly specify the desired size of the VM. With that, the agent doesn't need the metrics anymore, it will just try to make the vm-monitor's wish true. This is the autoscaler agent implementation of the RFC I proposed here: neondatabase/neon#8111. In order to use the new API, see the corresponding VM monitor changes at: https://github.com/neondatabase/neon/tree/heikki/wip-autoscale-api
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The new protocol message allows the vm-monitor to directly specify the desired size of the VM. With that, the agent doesn't need the metrics anymore, it will just try to make the vm-monitor's wish true.
This is the autoscaler agent implementation of the RFC I proposed here: neondatabase/neon#8111. In order to use the new API, see the corresponding VM monitor changes at: https://github.com/neondatabase/neon/tree/heikki/wip-autoscale-api