Executing binaries in a Linux Flex Consumption Plan

Question

Need confirmation whether executing native Linux binaries such as ffprobe/ffmpeg is supported in Flex Consumption. By default the main execution stack is read-only, so the binaries need to be moved "outside" to support a writeable working directory. This does allow execution, however they immediately segfault. The same binaries work locally and in Windows Consumption. No console access on Flex makes it impossible to debug. Requesting engineering confirmation whether this is supported by design.

This is a huge gap between the Flex and "Legacy" Consumption Plan. I would like to move to all Flex plans, but this is a significant limitation.

Answer 1

Hi Bill Wheelock,

Thanks for reaching out on Microsoft Q&A.

Regarding executing native Linux binaries such as ffprobe/ffmpeg in Flex Consumption

Flex Consumption plan containers run in a Linux environment with more control.

The main execution filesystem is read-only by default.

• Use dedicated Premium or App Service plans instead of Flex Consumption if binary execution is essential.
• Simplify binaries or recompile with compatibility in mind for the constrained environment.
• Monitor Azure Functions product updates for improvements in Flex Consumption native execution support.