Hello, I found it's not good idea to specify host in calling EVACUATE API for HA purpose.
In my case, one application includes many VMs, and each of them should run on seperate host, eg. co-location of VMs is not allowed for application robust purpose. The VM is created with scheduler hint to avoiding co-location. If a host is specified in calling evacuate API, then the task to find a proper host (avoiding co-location) has to be done before calling, and the logic is similar with nova scheduler. The HA function must reuse the NOVA scheduler logic, but not to duplicate it outside nova. Your comment is welcome . Joehuang
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