在運行Haproxy的Ubuntu 14.04上,在服務haproxy重新加載之后,Haproxy突然報告其背后的所有服務器.

經過一番挖掘后,我注意到ping無法正常工作,有時它能夠成功ping通,然后幾秒鐘后我們得到錯誤ping：sendmsg：不允許操作.

它也無法解析subdomain.domain.com.

iptables -L沒有顯示任何規則. iptables –flush沒有幫助.

有任何想法嗎？

root@some-test:~# ping 107.1.1.1

PING 107.1.1.1 (107.1.1.1) 56(84) bytes of data.

64 bytes from 107.1.1.1: icmp_seq=1 ttl=63 time=0.425 ms

ping: sendmsg: Operation not permitted

ping: sendmsg: Operation not permitted

ping: sendmsg: Operation not permitted

ping: sendmsg: Operation not permitted

64 bytes from 107.1.1.1: icmp_seq=6 ttl=63 time=0.390 ms

64 bytes from 107.1.1.1: icmp_seq=7 ttl=63 time=0.533 ms

64 bytes from 107.1.1.1: icmp_seq=8 ttl=63 time=0.357 ms

64 bytes from 107.1.1.1: icmp_seq=9 ttl=63 time=0.343 ms

64 bytes from 107.1.1.1: icmp_seq=10 ttl=63 time=0.380 ms

64 bytes from 107.1.1.1: icmp_seq=11 ttl=63 time=0.398 ms

64 bytes from 107.1.1.1: icmp_seq=12 ttl=63 time=0.423 ms

64 bytes from 107.1.1.1: icmp_seq=13 ttl=63 time=0.293 ms

ping: sendmsg: Operation not permitted

ping: sendmsg: Operation not permitted

64 bytes from 107.1.1.1: icmp_seq=16 ttl=63 time=0.371 ms

64 bytes from 107.1.1.1: icmp_seq=17 ttl=63 time=0.374 ms

64 bytes from 107.1.1.1: icmp_seq=18 ttl=63 time=0.305 ms

64 bytes from 107.1.1.1: icmp_seq=19 ttl=63 time=0.259 ms

ping: sendmsg: Operation not permitted

ping: sendmsg: Operation not permitted

ping: sendmsg: Operation not permitted

ping: sendmsg: Operation not permitted

64 bytes from 107.1.1.1: icmp_seq=24 ttl=63 time=0.370 ms

64 bytes from 107.1.1.1: icmp_seq=25 ttl=63 time=0.316 ms

64 bytes from 107.1.1.1: icmp_seq=26 ttl=63 time=0.412 ms

64 bytes from 107.1.1.1: icmp_seq=27 ttl=63 time=0.512 ms

64 bytes from 107.1.1.1: icmp_seq=28 ttl=63 time=0.375 ms

64 bytes from 107.1.1.1: icmp_seq=29 ttl=63 time=0.352 ms

64 bytes from 107.1.1.1: icmp_seq=30 ttl=63 time=0.331 ms

64 bytes from 107.1.1.1: icmp_seq=31 ttl=63 time=0.290 ms

64 bytes from 107.1.1.1: icmp_seq=32 ttl=63 time=0.353 ms

64 bytes from 107.1.1.1: icmp_seq=33 ttl=63 time=0.378 ms

64 bytes from 107.1.1.1: icmp_seq=34 ttl=63 time=0.523 ms

64 bytes from 107.1.1.1: icmp_seq=35 ttl=63 time=0.351 ms

64 bytes from 107.1.1.1: icmp_seq=36 ttl=63 time=0.302 ms

64 bytes from 107.1.1.1: icmp_seq=37 ttl=63 time=0.496 ms

64 bytes from 107.1.1.1: icmp_seq=38 ttl=63 time=0.377 ms

64 bytes from 107.1.1.1: icmp_seq=39 ttl=63 time=0.357 ms

64 bytes from 107.1.1.1: icmp_seq=40 ttl=63 time=0.396 ms

ping: sendmsg: Operation not permitted

ping: sendmsg: Operation not permitted

ping: sendmsg: Operation not permitted

ping: sendmsg: Operation not permitted

ping: sendmsg: Operation not permitted

ping: sendmsg: Operation not permitted

ping: sendmsg: Operation not permitted

ping: sendmsg: Operation not permitted

ping: sendmsg: Operation not permitted

ping: sendmsg: Operation not permitted

ping: sendmsg: Operation not permitted

64 bytes from 107.1.1.1: icmp_seq=52 ttl=63 time=0.372 ms

64 bytes from 107.1.1.1: icmp_seq=53 ttl=63 time=0.412 ms

64 bytes from 107.1.1.1: icmp_seq=54 ttl=63 time=0.321 ms

64 bytes from 107.1.1.1: icmp_seq=55 ttl=63 time=0.366 ms

64 bytes from 107.1.1.1: icmp_seq=56 ttl=63 time=0.379 ms

64 bytes from 107.1.1.1: icmp_seq=57 ttl=63 time=0.395 ms

64 bytes from 107.1.1.1: icmp_seq=58 ttl=63 time=0.488 ms

64 bytes from 107.1.1.1: icmp_seq=59 ttl=63 time=0.513 ms

64 bytes from 107.1.1.1: icmp_seq=60 ttl=63 time=0.435 ms

^C

--- 107.1.1.1 ping statistics ---

60 packets transmitted, 39 received, 35% packet loss, time 59008ms

rtt min/avg/max/mdev = 0.259/0.385/0.533/0.067 ms

總結

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