Unikraft redis doesn't start with `kraft run`, works correctly when started with Qemu

[andrejvelichkovski]

Hello, I noticed that when starting redis with the run option (instead of run_qemu) in the MUSL scripts it gives this error:

0:M 05 Dec 2022 19:40:42.023 # oO0OoO0OoO0Oo Redis is starting oO0OoO0OoO0Oo
0:M 05 Dec 2022 19:40:42.026 # Redis version=5.0.6, bits=64, commit=c5ee3442, modified=1, pid=0, just started
0:M 05 Dec 2022 19:40:42.031 # Configuration loaded
0:M 05 Dec 2022 19:40:42.097 # You requested maxclients of 10000 requiring at least 10032 max file descriptors.
0:M 05 Dec 2022 19:40:42.102 # Server can't set maximum open files to 10032 because of OS error: No such file or directory.
0:M 05 Dec 2022 19:40:42.107 # Current maximum open files is 1024. maxclients has been reduced to 992 to compensate for low ulimit. If you need higher maxclients increase 'ulimit -n'.
0:M 05 Dec 2022 19:40:42.116 # Fatal: Can't initialize Background Jobs.

It works all good when started directly with Qemu, so I guess this is not a big issue, but I wanted to report it still in case it helps with something else.

I have used this script for setup/build/run/run_qemu: https://github.com/unikraft-upb/scripts/blob/main/musl/do-redis