ring-buffer-config.yaml

apiVersion: apps/v1
kind: DaemonSet
metadata:
  name: ring-buffer-config-ds
  namespace: default
  labels:
    app: ring-buffer-config
spec:
  selector:
    matchLabels:
      app: ring-buffer-config
  template:
    metadata:
      labels:
        app: ring-buffer-config
    spec:
      containers:
        - name: ring-buffer-config
          image: telescope.azurecr.io/perf-eval/iperf3.18:v20250415
          command: ["/bin/sh"]
          args:
            - "-c"
            - |
              set -e;
              interface=$(ip -j link show | jq -r 'map(select(.master=="eth0"))[].ifname')
              ethtool -G $interface rx 2048
              sleep infinity # must be kept since daemonset will be restarted if the container exits
          readinessProbe:
            initialDelaySeconds: 1
            periodSeconds: 60
            exec:
              command:
                - /bin/sh
                - -c
                - |
                  set -e;
                  interface=$(ip -j link show | jq -r 'map(select(.master=="eth0"))[].ifname')
                  rx_size=$(ethtool -g $interface | awk '/Current hardware settings:/,/^$/ {if ($1 == "RX:") print $2}')
                  if [ "$rx_size" -ne 2048 ]; then
                    echo "RX ring buffer size for $interface is not 2048, current value is $rx_size" >> /proc/1/fd/1;
                    exit 1;
                  fi;
                  echo "RX ring buffer size for $interface is 2048" >> /proc/1/fd/1;
          securityContext:
            privileged: true
            capabilities:
              add:
                - NET_ADMIN
      hostNetwork: true
      tolerations:
        - key: "dedicated-test"
          operator: "Equal"
          value: "true"
          effect: "NoSchedule"
        - key: "dedicated-test"
          operator: "Equal"
          value: "true"
          effect: "NoExecute"
      nodeSelector:
        test: "true"