Failed to create pod sandbox: rpc error: code = Unknown desc = failed to create pod network sandbox k8s_curl-1-8-75c5467d87-clqkq_node-density-cni-0_ace5d1a2-c39d-4e7c-94ec-b8d164fd929b_0(d2de5f1128dc0db112d21643b42339afbbf0f8       ffde5da07c32acbc0c4e0b4543): error adding pod node-density-cni-0_curl-1-8-75c5467d87-clqkq to CNI network "multus-cni-network": plugin type="multus-shim" name="multus-cni-network" failed (add): CmdAdd (shim): CNI request failed with status 400: 'ContainerID:"d2de5f1128dc0db112d21643b42339afbbf0f8ffde5da07c32acb       c0c4e0b4543" Netns:"/var/run/netns/782e7182-a3da-4c76-b9a0-a5d3577f22e1" IfName:"eth0" Args:"IgnoreUnknown=1;K8S_POD_NAMESPACE=node-density-cni-0;K8S_POD_NAME=curl-1-8-75c5467d87-clqkq;K8S_POD_INFRA_CONTAINER_ID=d2de5f1128dc0db112d21643b42339afbbf0f8ffde5da07c32acbc0c4e0b4543;K8S_POD_UID=ace5d1a2-c39d-4e7c-94ec       -b8d164fd929b" Path:"" ERRORED: error configuring pod [node-density-cni-0/curl-1-8-75c5467d87-clqkq] networking: Multus: [node-density-cni-0/curl-1-8-75c5467d87-clqkq/ace5d1a2-c39d-4e7c-94ec-b8d164fd929b]: error loading k8s delegates k8s args: TryLoadPodDelegates: error in getting k8s network for pod: GetNetwor       kDelegates: failed getting the delegate: getKubernetesDelegate: failed to get a ResourceClient instance: getKubeletClient: error getting pod resources from client: getPodResources: failed to list pod resources, &{0xc000eda408}.Get(_) = _, rpc error: code = ResourceExhausted desc = rejected by rate limit 

    4.20

    Easily using kube-burner and churning > 300 pods with qps > 10.

    1. kube-burner-ocp node-density-cni --extract 
    2. Modify worklaod to add additional interfaces to pods
    3. kube-burner-ocp node-density-cni --qps 20 --churn-cycles 1 --churn-duration 1h --churn-delay 2m --pods-per-node=200

    The error above makes the pod creation fail, all existing interfaces are deleted and pod creation is re-scheduled, delaying the overall churn duration.