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Your instance types, networking environment, hypervisor type and version
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may all affect what kind of parameters should be used on your cluster.
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For example kvm instances are by default configured to use a host


  		





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kernel, and to be reached via serial console, which works nice for Linux


  		





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paravirtualized instances. If you want fully virtualized instances you


  		





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may want to handle their kernel inside the instance, and to use VNC.


  		





  
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.. admonition:: KVM


  		





  
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  Instances are by default configured to use a host kernel, and to be


  		





  
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  reached via serial console, which works nice for Linux paravirtualized


  		





  
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  instances. If you want fully virtualized instances you may want to


  		





  
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  handle their kernel inside the instance, and to use VNC.


  		





  
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  Some versions of KVM have a bug that will make an instance hang when


  		





  
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  configured to use the serial console (which is the default) unless a


  		





  
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  connection is made to it within about 2 seconds of the instance's


  		





  
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  startup. For such case it's recommended to disable the


  		





  
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  ``serial_console`` option.


  		





  
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Joining the nodes to the cluster


  		





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++++++++++++++++++++++++++++++++


  		












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