Improve egress IP node-offline-tracking error checking #20950
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danwinship
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[APPROVALNOTIFIER] This PR is APPROVED This pull-request has been approved by: danwinship, dcbw The full list of commands accepted by this bot can be found here. The pull request process is described here
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/retest Please review the full test history for this PR and help us cut down flakes. |
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/retest Please review the full test history for this PR and help us cut down flakes. |
This was referenced Sep 24, 2018
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The egress IP node offline tracking code was assuming that when nodes go offline, this would manifest as connections timing out. That works for detecting the initial online->offline transition, but eventually the kernel will start just returning
EHOSTUNREACHto new connection attempts right away if it knows the node is still not reachable. So we should consider that "offline" too.