cmd/cleanup: Fix cleanup of generic XDP programs #25117
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The 'cilium cleanup' command wasn't actually removing XDP programs attached to the generic hook point. This was causing issues when an XDP test in ginkgo was immediatly followed by the upgrade test. The upgrade test would run 'cilium cleanup' and remove everything except for the XDP programs. That would isolate the Cilium-managed nodes from the outside network (both SSH and intra-cluster connectivity). Obviously, this works when we change the Cilium configuration to disable XDP. There we have some logic to remove any leftover XDP programs on agent startup. Comparing that logic with the 'cilium cleanup' logic, we can see that the difference is that the agent removes XDP programs explicitely for each hook point (generic and driver). Let's do the same. This fix was tested manually on a setup with Cilium's generic XDP programs installed. Fixes: 6ed1fe5 ("cilium: Remove attached bpf_xdp upon "cilium cleanup"") Signed-off-by: Paul Chaignon <[email protected]>
pchaigno
added
kind/bug
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/test Job 'Cilium-PR-K8s-1.27-kernel-net-next' failed: Click to show.Test NameFailure OutputJenkins URL: https://jenkins.cilium.io/job/Cilium-PR-K8s-1.27-kernel-net-next/132/ If it is a flake and a GitHub issue doesn't already exist to track it, comment Then please upload the Jenkins artifacts to that issue. |
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For my own edification, the code in the xdp loader that cleans these up is here. |
squeed
approved these changes
Apr 26, 2023
julianwiedmann
added
backport-done/1.13
pchaigno
removed
affects/v1.11
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The
cilium cleanupcommand wasn't actually removing XDP programs attached to the generic hook point. This was causing issues when an XDP test in ginkgo was immediately followed by the upgrade test. The upgrade test would runcilium cleanupand remove everything except for the XDP programs. That would isolate the Cilium-managed nodes from the outside network (both SSH and intra-cluster connectivity).Obviously, this works when we change the Cilium configuration to disable XDP. There we have some logic to remove any leftover XDP programs on agent startup. Comparing that logic with the
cilium cleanuplogic, we can see that the difference is that the agent removes XDP programs explicitly for each hook point (generic and driver). Let's do the same.This fix was tested manually on a setup with Cilium's generic XDP programs installed.
Fixes: #19735.
Fixes: #24687.