Image on Docker Hub hub.docker.com/r/networkstatic/iperf3/
docker run -it --rm -p 5201:5201 networkstatic/iperf3 --help
To test bandwidth between two containers, start a server (listener) and point a client container (initiator) at the server.
Start a listener service on port 5201 and name the container "iperf3-server":
docker run -it --rm --name=iperf3-server -p 5201:5201 networkstatic/iperf3 -s
That returns an iperf3 process bound to a socket waiting for new connections:
-----------------------------------------------------------
Server listening on 5201
-----------------------------------------------------------
First, get the IP address of the new server container you just started:
docker inspect --format "{{ .NetworkSettings.IPAddress }}" iperf3-server
(Returned) 172.17.0.163
Next, initiate a client connection from another container to measure the bandwidth between the two endpoints.
Run a client container pointing at the server service IP address.
Note if you are new to Docker, the --rm flag will destroy the container after the test runs. I also left out explicitly naming the container on the client side since I don't need its IP address. I typically explicitly name containers for organization and to maintain a consistent pattern.
docker run -it --rm networkstatic/iperf3 -c 172.17.0.163
And the output is the following:
Connecting to host 172.17.0.163, port 5201
[ 4] local 172.17.0.191 port 51148 connected to 172.17.0.163 port 5201
[ ID] Interval Transfer Bandwidth Retr Cwnd
[ 4] 0.00-1.00 sec 4.16 GBytes 35.7 Gbits/sec 0 468 KBytes
[ 4] 1.00-2.00 sec 4.10 GBytes 35.2 Gbits/sec 0 632 KBytes
[ 4] 2.00-3.00 sec 4.28 GBytes 36.8 Gbits/sec 0 1.02 MBytes
[ 4] 3.00-4.00 sec 4.25 GBytes 36.5 Gbits/sec 0 1.28 MBytes
[ 4] 4.00-5.00 sec 4.20 GBytes 36.0 Gbits/sec 0 1.37 MBytes
[ 4] 5.00-6.00 sec 4.23 GBytes 36.3 Gbits/sec 0 1.40 MBytes
[ 4] 6.00-7.00 sec 4.17 GBytes 35.8 Gbits/sec 0 1.40 MBytes
[ 4] 7.00-8.00 sec 4.14 GBytes 35.6 Gbits/sec 0 1.40 MBytes
[ 4] 8.00-9.00 sec 4.29 GBytes 36.8 Gbits/sec 0 1.64 MBytes
[ 4] 9.00-10.00 sec 4.15 GBytes 35.7 Gbits/sec 0 1.68 MBytes
- - - - - - - - - - - - - - - - - - - - - - - - -
[ ID] Interval Transfer Bandwidth Retr
[ 4] 0.00-10.00 sec 42.0 GBytes 36.1 Gbits/sec 0 sender
[ 4] 0.00-10.00 sec 42.0 GBytes 36.0 Gbits/sec receiver
iperf Done.
Or you can do something fancier in a one liner like so (docker ps -ql returns the CID e.g. container ID of the last container started which would be the server we want in this case)
docker run -it --rm networkstatic/iperf3 -c $(docker inspect --format "{{ .NetworkSettings.IPAddress }}" $(docker ps -ql))
Connecting to host 172.17.0.193, port 5201
[ 4] local 172.17.0.194 port 60922 connected to 172.17.0.193 port 5201
[ ID] Interval Transfer Bandwidth Retr Cwnd
[ 4] 0.00-1.00 sec 4.32 GBytes 37.1 Gbits/sec 0 877 KBytes
[ 4] 1.00-2.00 sec 4.28 GBytes 36.7 Gbits/sec 0 1.01 MBytes
[ 4] 2.00-3.00 sec 4.18 GBytes 35.9 Gbits/sec 0 1.01 MBytes
[ 4] 3.00-4.00 sec 4.23 GBytes 36.3 Gbits/sec 0 1.13 MBytes
[ 4] 4.00-5.00 sec 4.20 GBytes 36.1 Gbits/sec 0 1.27 MBytes
[ 4] 5.00-6.00 sec 4.19 GBytes 36.0 Gbits/sec 0 1.29 MBytes
[ 4] 6.00-7.00 sec 4.17 GBytes 35.8 Gbits/sec 0 1.29 MBytes
[ 4] 7.00-8.00 sec 4.17 GBytes 35.8 Gbits/sec 0 1.29 MBytes
[ 4] 8.00-9.00 sec 4.17 GBytes 35.8 Gbits/sec 0 1.29 MBytes
[ 4] 9.00-10.00 sec 4.22 GBytes 36.3 Gbits/sec 0 1.29 MBytes
- - - - - - - - - - - - - - - - - - - - - - - - -
[ ID] Interval Transfer Bandwidth Retr
[ 4] 0.00-10.00 sec 42.1 GBytes 36.2 Gbits/sec 0 sender
[ 4] 0.00-10.00 sec 42.1 GBytes 36.2 Gbits/sec receiver
iperf Done.
You can use a public iperf3 server to measure your Internet speed
docker run -it --rm networkstatic/iperf3 -c ams.speedtest.clouvider.net -p 5208 -R -P15
The downstream speed is in the last line:
[SUM] 0.00-10.00 sec 2.72 GBytes 2.34 Gbits/sec receiver
So in this case: 2.34 Gbits/sec
Thanks to ESNET for re-rolling iperf from the ground up. It is a killer piece of software.