Docker iperf3 container for Synology NAS

alpine-iperf3.json

{
   "CapAdd" : null,
   "CapDrop" : null,
   "cmd" : "/bin/sh -c 'apk update && apk add iperf3 && iperf3 -s -p 7575'",
   "cpu_priority" : 50,
   "enable_publish_all_ports" : false,
   "enable_restart_policy" : true,
   "enable_service_portal" : null,
   "enabled" : true,
   "env_variables" : [
      {
         "key" : "PATH",
         "value" : "/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin"
      }
   ],
   "exporting" : false,
   "id" : "03a6d0737563e0001b95464ed0da4f607dc6200fda7957f176cca80a1a95a25f",
   "image" : "alpine:latest",
   "is_ddsm" : false,
   "is_package" : false,
   "links" : [],
   "memory_limit" : 0,
   "name" : "alpine-iperf3",
   "network" : [
      {
         "driver" : "bridge",
         "name" : "bridge"
      }
   ],
   "network_mode" : "bridge",
   "port_bindings" : [
      {
         "container_port" : 7575,
         "host_port" : 7575,
         "type" : "tcp"
      }
   ],
   "privileged" : false,
   "shortcut" : {
      "enable_shortcut" : false,
      "enable_status_page" : false,
      "enable_web_page" : false,
      "web_page_url" : ""
   },
   "use_host_network" : false,
   "volume_bindings" : []
}

Tested in DSM 7.1.1. Save the raw file, then open the Docker application (or Container Manager) and go to Container > Settings > Import > Upload > Browse > Select. The default port is 7575, you can change that by editing the local port, not the container port.

When it's running, you can run a speed test by connecting to the NAS IP address with port 7575, or whatever port you specified.