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Bug
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Resolution: Unresolved
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Medium
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None
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None
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None
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None
Problem:
I'm trying to use af_xdp plugin in kubernetes. But after creating vpp af_xdp interface the whole node just hangs.
Steps to reproduce:
1. kubectl installation:
https://kubernetes.io/docs/tasks/tools/
2. Kind tool installation.
For simplicity, we will use a local cluster created by kind.
https://kind.sigs.k8s.io/docs/user/quick-start/
3. Create a cluster.
Run:
$ kind create cluster --config cluster-config.yaml
(cluster-config.yaml is attached)
4. Create pods with vpp:
$ kubectl apply -f govpp.yaml
(govpp.yaml is attached)
5. Take a look at the current pods:
$ kubectl get pods NAME READY STATUS RESTARTS AGE govpp-9rqjm 1/1 Running 0 6s govpp-hj7m9 1/1 Running 0 6s
6. Go to the shell on one of the pods:
$ kubectl exec -it govpp-hj7m9 bash root@kind-worker:/#
7. ip link
root@kind-worker:/# ip link 1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN mode DEFAULT group default qlen 1000 link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00 324: eth0@if325: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UP mode DEFAULT group default link/ether 02:42:ac:12:00:03 brd ff:ff:ff:ff:ff:ff link-netnsid 0
8. Run vpp
root@kind-worker:/# vpp unix { interactive cli-listen 127.0.0.1:5002 }
9. Create af_xdp
vpp# create interface af_xdp host-if eth0
After that it seems that the whole node just hangs. And unfortunately I can't see any logs. And I noticed this not only on kind-cluster
It is worth adding that it hangs only when I use eth0 interface. If I add any veth-pair manually and create af_xdp - i don't see any freezes.
Additional information:
root@kind-worker:/# uname -a
Linux kind-worker 5.11.0-25-generic #27~20.04.1-Ubuntu SMP Tue Jul 13 17:41:23 UTC 2021 x86_64 x86_64 x86_64 GNU/Linux
VPP-image was taken from here - https://github.com/edwarnicke/govpp/pkgs/container/govpp%2Fvpp.
vpp# show version vpp v21.06.0-9~g16f166164 built by root on 40993b011c90 at 2021-08-17T13:00:00
