Transmission fails inside Docker Desktop container on Windows 10 WSL2

Docker Desktop
1

Synopsis

When I attempt to run Transmission bittorrent client inside a container, on Docker Desktop, using WSL2 on Windows 10, I get an error message saying:

root@c4ad5b4249cd:/# transmission-cli https://releases.ubuntu.com/21.04/ubuntu-21.04-desktop-amd64.iso.torrent
transmission-cli 2.94 (d8e60ee44f)
[2021-07-26 22:27:39.741] Transmission 2.94 (d8e60ee44f) started
[2021-07-26 22:27:39.741] RPC Server: Adding address to whitelist: 127.0.0.1
[2021-07-26 22:27:39.741] UDP: Failed to set receive buffer: requested 4194304, got 425984
[2021-07-26 22:27:39.741] UDP: Please add the line "net.core.rmem_max = 4194304" to /etc/sysctl.conf
[2021-07-26 22:27:39.741] UDP: Failed to set send buffer: requested 1048576, got 425984
[2021-07-26 22:27:39.741] UDP: Please add the line "net.core.wmem_max = 1048576" to /etc/sysctl.conf
[2021-07-26 22:27:39.741] DHT: Generating new id
[2021-07-26 22:27:40.076] Port Forwarding (NAT-PMP): initnatpmp succeeded (0)
[2021-07-26 22:27:40.076] Port Forwarding (NAT-PMP): sendpublicaddressrequest succeeded (2)

After modifying /etc/sysctl.conf in the docker-desktop WSL2 distribution, and restarting WSL using wsl --shutdown, the same behavior occurs.

Question

How can I successfully use Transmission CLI inside a Docker container under Docker Desktop on Windows 10 WSL?

2

Isn’t this the output inside your docker container? Wouldn’t you need to make those changes to the sysctl config then inside your docker container as well? :wink: