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keepalived的udp配置问题

池边树下2个月前 (10-09)尘凡57870

The server is turned down but can still detect the udp port · Issue #2477 · acassen/keepalived (github.com)

UDP healthchecker的超时时间至少配置4秒以上,否则无法探测到服务器关机

 

Please see the description of the UDP healthchecker in the keepalived.conf(5) man page:

        # UDP healthchecker
        # Note: for this checker to work properly, it relies on ICMP error messages such as
        #   HOST_UNREACH, NET_UNREACH, PORT_UNREACH. HOST_UNREACH relies on ARP requests
        #   timing out, and so connect_timeout should be long enough to allow for this (e.g.
        #   at least 4 seconds).

You have specified a connect_timeout of 1, but as stated above the timeout needs to be at least 4 seconds for the ARP request to time out.

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