Redis is blocked from external connections before getting restarted

Question

In my Ubuntu virtual machine in Hyper-V, I have installed Redis and it runs on startup (by doing sudo systemctl enable redis) and I have configured it to bind 127.0.0.1 192.168.10.100 in the config (the 2nd IP is for internal connections across the local network).

The problem I have is that when I start the virtual machine, it won't allow connections from other local computers (connecting from 192.168.10.100). But when I restart Redis by doing sudo systemctl restart redis it only then allows.

This problem is not because I forgot to restart Redis when adding 192.168.10.100 to the Redis bind.

Answer 1

This happens because redis is started before your interface is actually up and configured, I've been dealing with the same issue

I've added After=network-online.target to my redis.service file, this should actually wait until the network interface is "up", instead of just initialised (which may or may not include an IP). This might work for you

Unfortunately I haven't been able to test this yet, but I will update this comment once I've rebooted this system at least once