One service manages multiple deployment instances. Service uses nodePort type. Upstream traffic is distributed unevenly through different deployment through nodePort

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Cluster information:

Kubernetes version: v1.17.16
Cloud being used: (put bare-metal if not on a public cloud)
Installation method: kubeasz 2.2.4 ,Binary installation
Host OS: CentOS Linux release 7.9.2009 (Core)
CNI and version: calico v3.15.3
CRI and version: docker 19.03.14

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