|
anyone? :)
On 5/3/10 5:22 PM, Michiel van Es wrote:
>
> <snip>
>>>>>
>>>>>>
>>>>>> -------- Original Message --------
>>>>>> Subject: Re: [lvs-users] question about LVS
>>>>>> From: Michael Schwartzkopff<misch@xxxxxxxxxxx>
>>>>>> To: LinuxVirtualServer.org users mailing list.
>>>>>> <lvs-users@xxxxxxxxxxxxxxxxxxxxxx>
>>>>>> Date: 05/03/2010 02:34 PM
>>>>>>
>>>>>>
>>>>>>> Am Montag, 3. Mai 2010 14:31:32 schrieb Michiel van Es:
>>>>>>>
>>>>>>>> So to get it right:
>>>>>>>>
>>>>>>>> On the director:
>>>>>>>> >>>> net.ipv4.ip_forward = 1
>>>>>>>>
>>>>>>>> On the real servers:
>>>>>>>> >>>> net.ipv4.conf.all.arp_ignore = 1
>>>>>>>> >>>> net.ipv4.conf.eth0.arp_ignore = 1
>>>>>>>> >>>> net.ipv4.conf.all.arp_announce = 2
>>>>>>>> >>>> net.ipv4.conf.eth0.arp_announce = 2
>>>>>>>>
>>>>>>>> No forwarding on the real servers right?
>>>>>>>>
>>>>>>> Correct
>>>>>>>
>>>>>> Thanks.
>>>>>>
>>>>>> I still got the same results:
>>>>>>
>>>>>> I only connect to server2 and never to server1, also 1 of the 2
>>>>>> times I
>>>>>> get a 'No route to host':
>>>>>>
>>>>>> michiel@wmichiele:~$ telnet 194.145.200.87 25
>>>>>> Trying 194.145.200.87...
>>>>>> Connected to 194.145.200.87.
>>>>>> Escape character is '^]'.
>>>>>> 220 PCIntelligence mailserver 2 - mx2.pcintelligence.nl ESMTP
>>>>>> quit
>>>>>> 221 PCIntelligence mailserver 2 - mx2.pcintelligence.nl
>>>>>> Connection closed by foreign host.
>>>>>> michiel@wmichiele:~$ telnet 194.145.200.87 25
>>>>>> Trying 194.145.200.87...
>>>>>> telnet: Unable to connect to remote host: No route to host
>>>>>> michiel@wmichiele:~$ telnet 194.145.200.87 25
>>>>>> Trying 194.145.200.87...
>>>>>> Connected to 194.145.200.87.
>>>>>> Escape character is '^]'.
>>>>>> 220 PCIntelligence mailserver 2 - mx2.pcintelligence.nl ESMTP
>>>>>> quit
>>>>>> 221 PCIntelligence mailserver 2 - mx2.pcintelligence.nl
>>>>>> Connection closed by foreign host.
>>>>>> michiel@wmichiele:~$ telnet 194.145.200.87 25
>>>>>> Trying 194.145.200.87...
>>>>>> telnet: Unable to connect to remote host: No route to host
>>>>>>
>>>>>>
>> <snip>
>>>>
>>>> Just curious, can you telnet from 194.145.200.87 to 194.145.200.171:25?
>>>> Sounds as though the host at .171 is either a) not listening on port 25
>>>> or b) firewall rules (iptables) are preventing the connection from being
>>>> established. From experience, both will cause 'no route to host' errors.
>>>
>>> Both are working and listening and available from the LVS-DR:
>>>
>>> root@vps704:~/scripts# telnet server1.pcintelligence.nl 25
>>> Trying 194.145.200.17...
>>> Connected to server1.pcintelligence.nl.
>>> Escape character is '^]'.
>>> 220 PCIntelligence mailserver 1 - mx1.pcintelligence.nl ESMTP
>>> quit
>>> 221 PCIntelligence mailserver 1 - mx1.pcintelligence.nl
>>> Connection closed by foreign host.
>>> root@vps704:~/scripts# telnet server2.pcintelligence.nl 25
>>> Trying 194.145.200.171...
>>> Connected to server2.pcintelligence.nl.
>>> Escape character is '^]'.
>>> 220 PCIntelligence mailserver 2 - mx2.pcintelligence.nl ESMTP
>>> quit
>>> 221 PCIntelligence mailserver 2 - mx2.pcintelligence.nl
>>> Connection closed by foreign host.
>>>
>>> Kind regards,
>>>
>>> Michiel
>>>
>>>>
>>
>> What is the output of the 'ipvsadm' command on the director? Please
>> reply with the output pasted here or on the web (e.g. pastebin).
>>
>
> I also found out that it is the real server server1 which gives the problem.
> When I do an iptables -F on the server1 real server, a telnet to tje
> load balancer takes a very long time and then dies:
> michiel@wmichiele:~$ telnet 194.145.200.87 25
> Trying 194.145.200.87...
> telnet: Unable to connect to remote host: Connection timed out
>
>
> When I start the IPtables service:
> I get an:
> michiel@wmichiele:~$ telnet 194.145.200.87 25
> Trying 194.145.200.87...
> telnet: Unable to connect to remote host: No route to host
>
>
> But I don't understand it, the LVS DR is capable of connecting to the
> smtp port.
> Perhaps some routing or conntrack issues?
> Where should I look on server1 or the LVS-dr ?
>
> Kind regards,
>
> Michiel
>
>
>
> _______________________________________________
> Please read the documentation before posting - it's available at:
> http://www.linuxvirtualserver.org/
>
> LinuxVirtualServer.org mailing list - lvs-users@xxxxxxxxxxxxxxxxxxxxxx
> Send requests to lvs-users-request@xxxxxxxxxxxxxxxxxxxxxx
> or go to http://lists.graemef.net/mailman/listinfo/lvs-users
_______________________________________________
Please read the documentation before posting - it's available at:
http://www.linuxvirtualserver.org/
LinuxVirtualServer.org mailing list - lvs-users@xxxxxxxxxxxxxxxxxxxxxx
Send requests to lvs-users-request@xxxxxxxxxxxxxxxxxxxxxx
or go to http://lists.graemef.net/mailman/listinfo/lvs-users
|
