[Fargate] [request]: Fargate sysctls support for net.core

[heaven]

Tell us about your request Add ability to adjust net.core.* parameters

Which service(s) is this request for? ECS, Fargate

Tell us about the problem you're trying to solve. What are you trying to do, and why is it hard? We are adding HTTP/3 support into our service and need to adjust a few net.core.* parameters. The documentation here says

Valid network namespace values: Sysctls that start with "net.*"

All of these values are supported by Fargate.

The task fails to start while trying to set these parameters:

      "systemControls": [
        {
          "namespace": "net.core.rmem_max",
          "value": "7500000"
        },
        {
          "namespace": "net.core.wmem_max",
          "value": "7500000"
        }
      ],

With the following error messages:

runc create failed: unable to start container process: error during container init: open /proc/sys/net/core/rmem_max: no such file or directory
runc create failed: unable to start container process: error during container init: open /proc/sys/net/core/wmem_max: no such file or directory