[Pkg-nagios-devel] Bug#705900: Bug#705900: check_ping fail if host do not have IPv6 address

[Jan Wagner]

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tag 705900 + moreinfo unreproducible
thanks

Hi Petter,

thanks for taking time to reporting your issue.

Am 22.04.2013 00:22, schrieb Petter Reinholdtsen:
> The DNS host name in question only resolve to an IPv4 address, but ping6
> is tried nevertheless:
> 
>   root at tjener:~# host tjener.intern
>   tjener.intern has address 10.0.2.2
>   root at tjener:~# /usr/lib/nagios/plugins/check_ping -H tjener.intern -w 10,10% -c 10,10%
>   /bin/ping6 -n -U -w 10 -c 5 tjener.intern
>   CRITICAL - Could not interpret output from ping command
>   root at tjener:~# 

I tried to reproduce your problem on an i386 and amd64 system, but all 
worked as expected:

waja at bodengruppe:~$ dpkg -l | grep nagios-plugins-basic
ii  nagios-plugins-basic               1.4.16-1                     amd64        Plugins for nagios compatible monitoring systems
waja at bodengruppe:~$ /usr/lib/nagios/plugins/check_ping -vvv -H test.test.org -w 10,10% -c 10,10%
CMD: /bin/ping -n -U -w 10 -c 5 test.test.org
Output: PING test.test.org (127.0.0.1) 56(84) bytes of data.
Output: 64 bytes from 127.0.0.1: icmp_req=1 ttl=64 time=0.020 ms
Output: 64 bytes from 127.0.0.1: icmp_req=2 ttl=64 time=0.029 ms
Output: 64 bytes from 127.0.0.1: icmp_req=3 ttl=64 time=0.034 ms
Output: 64 bytes from 127.0.0.1: icmp_req=4 ttl=64 time=0.032 ms
Output: 64 bytes from 127.0.0.1: icmp_req=5 ttl=64 time=0.037 ms
Output: 
Output: --- test.test.org ping statistics ---
Output: 5 packets transmitted, 5 received, 0% packet loss, time 3997ms
Output: rtt min/avg/max/mdev = 0.020/0.030/0.037/0.007 ms
PING OK - Packet loss = 0%, RTA = 0.03 ms|rta=0.030000ms;10.000000;10.000000;0.000000 pl=0%;10;10;0
10.000000:10% 10.000000:10%

waja at bb:~$ dpkg -l | grep nagios-plugins-basic
ii  nagios-plugins-basic               1.4.16-1                     i386         Plugins for nagios compatible monitoring systems
waja at bb:~$ /usr/lib/nagios/plugins/check_ping -vvv -H test.test.org -w 10,10% -c 10,10%
CMD: /bin/ping -n -U -w 10 -c 5 test.test.org
Output: PING test.test.org (127.0.0.1) 56(84) bytes of data.
Output: 64 bytes from 127.0.0.1: icmp_req=1 ttl=64 time=0.027 ms
Output: 64 bytes from 127.0.0.1: icmp_req=2 ttl=64 time=0.032 ms
Output: 64 bytes from 127.0.0.1: icmp_req=3 ttl=64 time=0.040 ms
Output: 64 bytes from 127.0.0.1: icmp_req=4 ttl=64 time=0.046 ms
Output: 64 bytes from 127.0.0.1: icmp_req=5 ttl=64 time=0.044 ms
Output: 
Output: --- test.test.org ping statistics ---
Output: 5 packets transmitted, 5 received, 0% packet loss, time 3997ms
Output: rtt min/avg/max/mdev = 0.027/0.037/0.046/0.010 ms
PING OK - Packet loss = 0%, RTA = 0.04 ms|rta=0.037000ms;10.000000;10.000000;0.000000 pl=0%;10;10;0
10.000000:10% 10.000000:10%

> The issue seem to be similar to the ones reported in 
> <URL: http://bugs.debian.org/597068 > and
> <URL: http://bugs.debian.org/629640 >, but those reports seem to be
> related to problems with hosts where AAAA records are present.  This is
> not the case here.
> 
> Could you please change check_ping to use IPv4 ping if no AAAA entry is
> present in DNS?

Right from the sourcecode of the plugin:

"#ifdef PING6_COMMAND
if (address_family != AF_INET && is_inet6_addr(addresses[i]))
rawcmd = strdup(PING6_COMMAND);
else
rawcmd = strdup(PING_COMMAND);
#else
rawcmd = strdup(PING_COMMAND);
#endif"

Looks not bad.

If you can give me more informations, maybe I can dig into it.

Many thanks, Jan.
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