lvs providing simple web service on top of gfs cluster

[James Bourne]

On Fri, 22 Sep 2006, Greg Swift wrote:

> Next I installed and setup the lvs (piranha based) routers. The steps 
> literally include this:
> 1: up2date --installall=rhel-i386-es-4-cluster
> 2: set net.ipv4.ip_forward to 1 in /etc/sysctl.conf and to save a reboot do 
> 'sysctl -w net.ip4.ip_forward=1'
> 3: piranha-passwd
> 4: service piranha-gui start
> 5: configure web interface, (if you want to see it i will show lvs.cf, but 
> i'd rather not push it into a mailing list archive)
> 6: scp /etc/sysconfig/ha/lvs.cf root at box2:/etc/sysconfig/ha/lvs.cf
> 7: service pulse start
>
> I've configured the firewall to allow the traffic I want through (basically 
> anywhere can access anywhere via port 80), but have tried this with the 
> firewall turned off.

I believe you will have to nat the internal network as well I believe, to
mangle the packets going out with the IP of the redirector box
(216.177.160.9) before the packages will return, otherwise they may come
back from one of your 172.16 IPs which would give you the No route to host
error.

Regards
james

>
> A quick check at the cli shows:
> [root at ament ~]# ipvsadm -L -n
> IP Virtual Server version 1.2.0 (size=4096)
> Prot LocalAddress:Port Scheduler Flags
> -> RemoteAddress:Port Forward Weight ActiveConn InActConn
> TCP 216.177.160.9:80 wlc persistent 120
> -> 172.16.1.124:80 Masq 1 0 0
> -> 172.16.1.123:80 Masq 1 0 0
> -> 172.16.1.121:80 Masq 1 0 0
> -> 172.16.1.122:80 Masq 1 0 0
>
> although i guess that tells every1 what my lvs.cf looks like... heheh
> at this point if i try and access 216.177.160.9:80 the InActConn field 
> increments for the 1.124 box, but thats it
> also, i don't know if its supposed to show up there, but i dont see anything 
> in netstat supporting this. (nothing is listening on port 80, but i realize a 
> port forwarding firewall won't necessarily show that).
>
> Here is what happens when you try and access port 80 via telnet:
>
> [root at shiva etc]# telnet 216.177.160.9 80
> Trying 216.177.160.9...
> telnet: connect to address 216.177.160.9: No route to host
> telnet: Unable to connect to remote host: No route to host
>
> but
>
> [root at shiva etc]# ping 216.177.160.9
> PING 216.177.160.9 (216.177.160.9) 56(84) bytes of data.
> 64 bytes from 216.177.160.9: icmp_seq=0 ttl=64 time=0.254 ms
>
>
> To specify my skill set, I am an rhce, but I realize that i'm probably doing 
> something wrong. I did follow the lvs/piranha documentation on rh's site, and 
> have an open case w/ them. anyone else know any gotchas or have some 
> recommendations about what might be the solution?
>
> -greg
>
>

-- 
James Bourne                  | Email:            jbourne at hardrock.org
UNIX Systems Administration   | WWW:           http://www.hardrock.org
Custom UNIX Programming       | Linux:  The choice of a GNU generation
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  "All you need's an occasional kick in the philosophy." Frank Herbert