Hardcoded Redis socket path

[lool]

Hi,

While working on a SONiC snap, I hit the hardcoded path to the Redis unix socket. It's defined in header files at build time and ends up in a number of daemons (syncd etc.) and libs (libsairedis). This makes it impractical to relocate SONiC, to have multiple versions of it on the same box or to integrate into a different FS layout.

It would be nice to have a runtime override for the path, either an environment variable (SONIC_REDIS_URL?) or a command-line flag that would have to be passed to each program using Redis (--redis-url).

Thanks,
-- Loïc Minier

[lool]

This is the workaround I'm currently using; I'm binary patching syncd, libsairedis etc. with this sed snippet:
sed -i 's#/var/run/redis/redis\.sock#link-to-redis-socket.sock#g' syncd
and then I create a symlink from the current directory before launching syncd/other daemons:
ln -s /actual/path/to/redis.sock link-to-redis-socket.sock

[lool]

(NB: link-to-redis-socket.sock is the exact same length as the original string)

[lguohan]

I think the problem is still not solved. DEFAULT_UNIXSOCKET

https://github.com/Azure/sonic-swss-common/blob/fd58ade7304e673b0e70d8d72d2dc5a0b4ad24d7/common/dbconnector.h

[qiluo-msft]

Agree. I will work on it later.