guestagent: remove iptables watcher for rootful nerdctl (v2.1.6) #4107
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AkihiroSuda force-pushed the fix-4085 branch from f65e842 to 3152f8c Compare 
AkihiroSuda commented Sep 29, 2025
AkihiroSuda force-pushed the fix-4085 branch from 3152f8c to 017d9d5 Compare AkihiroSuda changed the title https://github.com/containerd/nerdctl/releases/tag/v2.1.6 Signed-off-by: Akihiro Suda <akihiro.suda.cz@hco.ntt.co.jp>
This commit significantly simplifies the guestagent, by removing the complex and non-robust iptables watcher that had existed solely for `sudo nerdctl`. This iptables watcher is no longer needed since nerdctl v2.1.6, as it exposes proper `/proc/net` entries even for rootful containers. See containerd/nerdctl PR 4526. Fix issue 4085 Signed-off-by: Akihiro Suda <akihiro.suda.cz@hco.ntt.co.jp>
AkihiroSuda force-pushed the fix-4085 branch from 017d9d5 to bdeff40 Compare 
jandubois approved these changes Sep 30, 2025
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Thanks, LGTM
I've been running hack/bats/extras/port-monitor.bats with both docker and default templates. The docker test failed once, but succeeded on retries. This is a known issue:
❯ time TEMPLATE=docker ./lib/bats-core/bin/bats -T extras/port-monitor.bats port-monitor.bats ✓ Verify that the container is working [5073] ✗ Stop and restart the container multiple times [6497] (from function `assert_success' in file lib/bats-assert/src/assert_success.bash, line 45, from function `verify_port' in file extras/port-monitor.bats, line 51, in test file extras/port-monitor.bats, line 66) `verify_port' failed ... -- command failed -- status : 7 output : --| } | ||
| | ||
| func (a *agent) LocalPorts(ctx context.Context) ([]*api.IPPort, error) { | ||
| func (a *agent) LocalPorts(_ context.Context) ([]*api.IPPort, error) { |
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The _ is only needed when you mix named and unnamed parameters.
Suggested change
| func (a *agent) LocalPorts(_ context.Context) ([]*api.IPPort, error) { | |
| func (a *agent) LocalPorts(context.Context) ([]*api.IPPort, error) { |
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Linter doesn't allow that
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Are you sure?
❯ GOOS=linux golangci-lint run pkg/guestagent/... 0 issues. Member Author
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IIRC CI failed without that, but I could be wrong
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This commit significantly simplifies the guestagent, by removing the complex and non-robust iptables watcher that had existed solely for
sudo nerdctl.This iptables watcher is no longer needed since nerdctl v2.1.6, as it exposes proper
/proc/netentries even for rootful containers.See:
Fix #4083
Fix #4085
Fix #4094