How do two default routes happen? I remember jgreco explaining on the old forums why you can only have one default gateway and that explanation made sense to me. Now I see this and I am curious what is the semantics of this (and how do the Linux/BSD network stacks differ in this regard).
I’ll see if I can dig up the original article, but I thought you could only have 1 default gateway specified (at least on FreeBSD)?
What does the output of “ip route” show?
Here is the ip route output - there seems to be a single default specified.
admin@storage[~]$ ip route
default via 10.0.50.2 dev enp134s0f0np0 proto static
10.0.30.0/28 dev enp7s0f1 proto kernel scope link src 10.0.30.10
10.0.50.0/29 dev enp134s0f0np0 proto kernel scope link src 10.0.50.1
10.0.60.0/29 dev enp134s0f1np1 proto kernel scope link src 10.0.60.1
10.0.100.0/24 dev eno1 proto kernel scope link src 10.0.100.101
172.17.0.0/16 dev kube-bridge proto kernel scope link src 172.17.0.1
Well, I know you can’t have 2 actual default routes, but, wasn’t sure what Scale was reporting since it showed two. ip route shows you have 1 which is correct, 10,0.50.2 is the one default, so, that matches your networking setup. Therefore, it has to be because of your so called kubernetes settings, is that what you actually wanted? It shouldn’t be calling it a default route though.
Yeah, if you follow the link in the above post, you’ll find more details on why I did that. In short, I had hoped that by providing these two, the K8s traffic will be routed through a dedicated interface and subnet. That didn’t happen, however - still waiting on some thoughts as to why.
Still, I think that additional value in the Default Route is very confusing and should not be there.
I don’t think it should be there either, if they want it there, they should change the name from default route as that has a specific meaning. I think it’s a bug.
I didn’t read the articles. But I don’t know specifically how to route your Kubernetes traffic through the dedicated interface so someone else needs to chime in. There may be some specific rules there.
