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Machine started with Jailer and CNI but without NetNS config reports "Failed to write to tap: Os { code: 5, kind: Other, message: "I/O error" }" #324

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everesio opened this issue Mar 10, 2021 · 0 comments

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@everesio
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When a machine is created with Jailer and CNI, but without NetNS configuration, it continually reports "Failed to write to tap: Os { code: 5, kind: Other, message: "I/O error" }"
No such problem occurs when NetNS parameter is provided.

I've noticed that the NewMachine function calls jail function, before default NetNSPath is assigned to the machine config
i.e.

jail does not configure nspath

if cfg.NetNS != "" {
	builder = builder.WithNetNS(cfg.NetNS)
}

later NewMachine configures a default one

if cfg.NetNS == "" && cfg.NetworkInterfaces.cniInterface() != nil {
	m.Cfg.NetNS = m.defaultNetNSPath()
}
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