主机连通性检查 ping 超时控制

[wangsu728]

实际测试发现会存在部分机器 ping 正常但是通过 cloudcli ping 检查失败的情况，建议增加超时控制

# cloudcli ping -n elm-lang
elm-lang.cn                   --------------------[NG]

# ping -c4 elm-lang.cn
PING elm-lang.cn (123.57.150.34) 56(84) bytes of data.
64 bytes from 123.57.150.34: icmp_seq=1 ttl=51 time=41.5 ms
64 bytes from 123.57.150.34: icmp_seq=2 ttl=51 time=41.7 ms
64 bytes from 123.57.150.34: icmp_seq=3 ttl=51 time=41.4 ms
64 bytes from 123.57.150.34: icmp_seq=4 ttl=51 time=41.5 ms

--- elm-lang.cn ping statistics ---
4 packets transmitted, 4 received, 0% packet loss, time 3047ms
rtt min/avg/max/mdev = 41.479/41.583/41.733/0.096 ms

[linuxr]

这种情况一般是权限的问题。可以把log文件中的内容也贴出来
执行 cloudcli ping 之前 如下设置试试看：

sysctl -w net.ipv4.ping_group_range="0 65535"