linkerd init container for transparent HTTP proxy

linkerd-init-container.yaml

      initContainers:
      - name: linkerd-transparent-proxy
        env:
        - name: L5D_HOST
          valueFrom:
            fieldRef:
              fieldPath: status.hostIP
        - name: L5D_PORT
          value: "4140"
        image: googlecontainer/debian-iptables-amd64:v9
        securityContext:
          privileged: true
        command: ['sh', '-c', 'iptables -t nat -A OUTPUT -p tcp -j DNAT -m multiport --dports 80 --to ${L5D_HOST}:${L5D_PORT} -m comment --comment "send all HTTP traffic via linkerd"']