kubernetes/minikube

Cillium CNI in VM Drivers fails "address family not supported by protocol""

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#18,851 opened on May 10, 2024

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area/cnihelp wantedpriority/important-soon

Description

for ISO (qemu driver) I get this error in the pod logs

"failed while reinitializing datapath: listing routing rules: address family not supported by protocol"

fixAndUpdateCiliumCNI ✓
$ kc get pods -A
NAMESPACE     NAME                               READY   STATUS             RESTARTS      AGE
kube-system   cilium-cssbc                       0/1     CrashLoopBackOff   7 (99s ago)   13m
kube-system   cilium-operator-64664858c8-xbs79   1/1     Running            0             13m
kube-system   coredns-7db6d8ff4d-xvrmk           0/1     Pending            0             13m
kube-system   etcd-minikube                      1/1     Running            0             13m
kube-system   kube-apiserver-minikube            1/1     Running            0             13m
kube-system   kube-controller-manager-minikube   1/1     Running            0             13m
kube-system   kube-proxy-d96m9                   1/1     Running            0             13m
kube-system   kube-scheduler-minikube            1/1     Running            0             13m
kube-system   storage-provisioner                0/1     Pending            0             13m

the log for container

$ kc logs cilium-cssbc -n kube-system | grep error
Defaulted container "cilium-agent" out of: cilium-agent, config (init), mount-cgroup (init), apply-sysctl-overwrites (init), mount-bpf-fs (init), clean-cilium-state (init), install-cni-binaries (init)
time="2024-05-09T23:45:53Z" level=info msg="  --kvstore-max-consecutive-quorum-errors='2'" subsys=daemon
time="2024-05-09T23:45:54Z" level=error msg="Start hook failed" error="daemon creation failed: error while initializing daemon: failed while reinitializing datapath: listing routing rules: address family not supported by protocol" function="cmd.newDaemonPromise.func1 (cmd/daemon_main.go:1686)" subsys=hive
time="2024-05-09T23:45:54Z" level=error msg="Observer job stopped with an error" error="context canceled" func="auth.(*authMapGarbageCollector).handleIdentityChange" name="auth gc-identity-events" subsys=auth
time="2024-05-09T23:45:54Z" level=error msg="Observer job stopped with an error" error="context canceled" func="auth.(*AuthManager).handleAuthRequest" name="auth request-authentication" subsys=auth
time="2024-05-09T23:45:54Z" lev

but it could be only for ISO https://github.com/cilium/cilium/issues/29965

Originally posted by @medyagh in https://github.com/kubernetes/minikube/issues/18846#issuecomment-2103619261

Contributor guide

Tech stack
go
Domain
infrastructuredevops
Issue type
bug
DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.
4
Estimated timeA rough time range for an experienced contributor to investigate, implement, test, and prepare a pull request.
1-2 days
Activity statusHow available the issue appears right now: fresh, active, stale, blocked, or waiting on maintainer input.
fresh
ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.
needs investigation
Prerequisites
Kubernetes basicsCilium conceptsMinikube VM drivers
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
30
Research direction
The error occurs in Cilium agent inside minikube's ISO (QEMU driver). The issue references a Cilium issue (https://github.com/cilium/cilium/issues/29965) which may provide insight. Investigate whether the 'address family not supported by protocol' error is related to IPv6 or routing rules in the VM environment. Check minikube's ISO configuration and Cilium's datapath initialization code, particularly the 'listing routing rules' function. Consider if a kernel module or sysctl setting is missing in the ISO image.