libcontainer: fix the way to get network stats #2072
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Currently runc does not know the interfaces, so c.config.Networks is null. But we can get the network stats from "/proc/<initPid>/root/sys/class/net/<EthInterface>/statistics/" Signed-off-by: ZeroMagic <anthonyliu@zju.edu.cn>
Signed-off-by: ZeroMagic <anthonyliu@zju.edu.cn>
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/ping @crosbymichael |
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Although
getNetworkInterfaceStats(interfaceName string)was implemented in runc, containerd does not transfer the interface name to runc. So we still can’t get the network stats from libcontainer’s Stats().Because in a runc container, we can get network stats by
cat /proc/<init pid>/root/sys/class/net/<EthInterface>/statistics/rx_bytes. So I leverage this point.With this PR,
runc events --stats <containerd-id>can return network stats.