Speedtest cannot read from socket

[itsmejoeeey]

I noticed I was getting large gaps (sometimes 5+ hours) in the data received by prometheus, even though the speedtest should be occurring hourly.

docker-compose.yml

  speedtest:
    image: "billimek/prometheus-speedtest-exporter:1.3.1"
    restart: "unless-stopped"

I decided to run the speedtest manually inside the container to try and debug this.

With speedtest --accept-license --accept-gdpr -f tsv -v -v -v I get the following (not reliably, but most of the time):

[2024-04-03 12:06:15.462] [info] Ping 1: 2.97 ms (2.97ms min, 0.00ms jitter)
[2024-04-03 12:06:15.465] [info] Ping 2: 2.53 ms (2.53ms min, 0.44ms jitter)
[2024-04-03 12:06:15.468] [info] Ping 3: 2.32 ms (2.32ms min, 0.33ms jitter)
[2024-04-03 12:06:15.470] [info] Ping 4: 2.52 ms (2.32ms min, 0.29ms jitter)
[2024-04-03 12:06:15.473] [info] Ping 5: 2.60 ms (2.32ms min, 0.23ms jitter)
[2024-04-03 12:06:15.473] [info] Final Ping: 2.32 ms
[2024-04-03 12:06:15.474] [info] Stage 1 completed
[2024-04-03 12:06:15.474] [info] Starting stage 2 of type 3
[2024-04-03 12:06:24.204] [info] Stage 2 completed
[2024-04-03 12:06:24.205] [info] Smoothing graph for test with 0.580 progress, with duration of 0 ms in 0 updates
[2024-04-03 12:06:24.205] [info] Starting stage 3 of type 4
[2024-04-03 12:06:24.214] [info] Packet loss sent=174, received=174, dupes=0, maxId=173
[2024-04-03 12:06:27.330] [warning] Receive error: 11 (Resource temporarily unavailable)
[2024-04-03 12:06:27.331] [info] Connection 1 failed. Added connection and continuing test.
[2024-04-03 12:06:27.330] [warning] Receive error: 11 (Resource temporarily unavailable)
[2024-04-03 12:06:27.331] [info] Connection 2 failed. Added connection and continuing test.
[2024-04-03 12:06:27.331] [warning] Loaded latency: cannot read response.: [11] Resource temporarily unavailable
[2024-04-03 12:06:27.331] [warning] Receive error: 11 (Resource temporarily unavailable)
[2024-04-03 12:06:27.330] [warning] Receive error: 11 (Resource temporarily unavailable)
[2024-04-03 12:06:27.331] [warning] Receive error: 11 (Resource temporarily unavailable)
[2024-04-03 12:06:27.332] [warning] Loaded latency: Hello handshake failed with the server: [0] Cannot read from socket: 
[2024-04-03 12:06:27.332] [info] Connection 3 failed. Added connection and continuing test.
[2024-04-03 12:06:27.334] [info] Connection 4 failed. Added connection and continuing test.
[2024-04-03 12:06:27.335] [error] Test failed to complete: Cannot read from socket:

I've tested with network_mode: host and this seems to solve the issue, although some non-fatal warnings about Cannot read from uninitialized socket can still be seen in the runs.

If possible I'd rather not use host-networking, and I'm at a loss as to why this would be required. Additionally if this is a known-necessity it may be worth documenting.

Has anyone else encountered this? Is there a way I can have the speedtest work reliably with bridge-networking?