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besogon_9363's avatar
besogon_9363
Icon for Nimbostratus rankNimbostratus
Dec 08, 2011

irule to direct traffic...

Need to build an irule to direct traffic to another VS only if there are no active members in the pool associated with the first VS. Any help is greatly appreciated.

Thanks

 

application delivery
dev
devops
iRules
  • nitass's avatar
    nitass
    Icon for Employee rankEmployee
    Dec 08, 2011
    e.g. 

    [root@ve1023:Active] config  b virtual bar list
virtual bar {
   snat automap
   pool foo
   destination 172.28.19.79:80
   ip protocol 6
   rules myrule
}
[root@ve1023:Active] config  b pool foo list
pool foo {
   monitor all fake
   members 200.200.200.101:80 {}
}
[root@ve1023:Active] config  b pool foo|grep -i pool\ member
+-> POOL MEMBER foo/200.200.200.101:80   inactive,down
[root@ve1023:Active] config  b rule myrule list
rule myrule {
   when CLIENT_ACCEPTED {
        if {[active_members [LB::server pool]] < 1} {
                virtual bar2
        }
}
}

[root@ve1023:Active] config  b virtual bar2 list
virtual bar2 {
   snat automap
   pool foo2
   destination 1.1.1.1:80
   ip protocol 6
}
[root@ve1023:Active] config  b pool foo2 list
pool foo2 {
   members 200.200.200.102:80 {}
}

 curl -I http://172.28.19.79/
HTTP/1.1 200 OK
Date: Thu, 08 Dec 2011 04:25:41 GMT
Server: Apache/2.2.3 (CentOS)
Last-Modified: Tue, 08 Nov 2011 12:26:29 GMT
ETag: "4183f1-30-47e02740"
Accept-Ranges: bytes
Content-Length: 48
Connection: close
Content-Type: text/html; charset=UTF-8

[root@ve1023:Active] config  tcpdump -nni 0.0 port 80 and not host 200.200.200.10 and 'tcp[13] & 2!=0'
tcpdump: verbose output suppressed, use -v or -vv for full protocol decode
listening on 0.0, link-type EN10MB (Ethernet), capture size 108 bytes
20:26:54.272408 IP 172.28.19.251.39231 > 172.28.19.79.80: S 3171176811:3171176811(0) win 5840 
20:26:54.272447 IP 172.28.19.79.80 > 172.28.19.251.39231: S 165646667:165646667(0) ack 3171176812 win 4380 
20:26:54.273506 IP 172.28.19.251.39231 > 1.1.1.1.80: S 1021857758:1021857758(0) win 4380 
20:26:54.273511 IP 172.28.19.251.39231 > 1.1.1.1.80: S 1021857758:1021857758(0) win 4380 
20:26:54.273521 IP 1.1.1.1.80 > 172.28.19.251.39231: S 300771454:300771454(0) ack 1021857759 win 4380 
20:26:54.273533 IP 1.1.1.1.80 > 172.28.19.251.39231: S 300771454:300771454(0) ack 1021857759 win 4380 
20:26:54.273557 IP 200.200.200.100.39231 > 200.200.200.102.80: S 2110616188:2110616188(0) win 4380 
20:26:54.274554 IP 200.200.200.102.80 > 200.200.200.100.39231: S 1477245557:1477245557(0) ack 2110616189 win 5792