Fix metrics collection failure in network=host mode#12883
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zsxsoft wants to merge 1 commit intogoogle:masterfrom
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Fix metrics collection failure in network=host mode#12883zsxsoft wants to merge 1 commit intogoogle:masterfrom
zsxsoft wants to merge 1 commit intogoogle:masterfrom
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When using hostinet (network=host), /proc/net/dev and /proc/net/snmp may not be available inside the sandbox. Previously Statistics() returned an error when these files were not opened, which propagated up and caused the entire event/metrics collection to fail, breaking kubectl top pod. Return zero-valued stats instead of an error when the proc files are unavailable, as this is expected in hostinet mode. Real errors like parse failures still propagate. Fixes google#12723
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When using hostinet (network=host), /proc/net/dev and /proc/net/snmp may not be available inside the sandbox. Previously Statistics() returned an error when these files were not opened, which propagated up and caused the entire event/metrics collection to fail, breaking kubectl top pod.
Return zero-valued stats instead of an error when the proc files are unavailable, as this is expected in hostinet mode. Real errors like parse failures still propagate.
Fixes #12723