liuzhuo created FLINK-24947:
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             Summary: Flink on k8s support HostNetWork model
                 Key: FLINK-24947
                 URL: https://issues.apache.org/jira/browse/FLINK-24947
             Project: Flink
          Issue Type: New Feature
          Components: Deployment / Kubernetes
            Reporter: liuzhuo


For the use of flink on k8s, for performance considerations, it is important to 
choose a CNI plug-in. Usually we have two environments: Managed and UnManaged.

  Managed: Cloud vendors usually provide very efficient CNI plug-ins, we don’t 
need to care about network performance issues

  UnManaged: On self-built K8s clusters, CNI plug-ins are usually optional, 
similar to Flannel and Calcico, but such software network cards usually lose 
some performance or require some additional network strategies.

For an unmanaged environment, if we also want to achieve the best network 
performance, should we support the *HostNetWork* model?
Use the host network to achieve the best performance



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