Inter-VIP communication

Yes you can with an iRule, in the iRule you need to use the virtual Command however this has an issue. When you use virtual you can’t check the status of the virtual server you are forwarding to before so it is a blind forward unless you know and check the associated pools.

when HTTP_REQUEST {
  if { [HTTP::uri] starts_with “/vs2”} {
   Send request to a new virtual server
    virtual vs2
  }
}

A better approach might be to forward to different pools instead of different virtual servers.

The only two reasons I have used virtual is for Data Centre Affinity and automatically selecting virtual for different SSL profiles.

when HTTP_REQUEST {
  if { [HTTP::uri] starts_with “/vs2”} {
   Send request to a new virtual server
    pool vs2_pool
  }
}

My aim is to ensure inter-VIPs communication, will this script help me in doing so?

The first iRule using virtual will do inter VIP communication for you, just edit to match your requirements and names.

I have applied following iRule on vs.37 to communicate with vs.38 when HTTP_REQUEST { if { [HTTP::uri] starts_with “/vs37”} { virtual vs.38 }

and applied following iRule on vs.38 to build communication b/w vs.38 and vs.36 when HTTP_REQUEST { if { [HTTP::uri] starts_with “/vs38”} { virtual vs.36 } } Kindly confirm the syntax and applied method please.

I have tested the above commands but it couldn't make inter-VIPs communication successfully.

could you explain this better?

Step 1: Clients are hitting successfully VIP.37

Step 2: VIP.37 requires to communicate with VIP.38

Step 3: VIP.38 requires communication with VIP.36 to fetch some files.

how is that communication exactly happening? or how do you believe it should be happening?

is vip.37 going to a pool with nodes or ...? are there links on the website (is it a website? for vip.37 pointing to vip.38?

in the general the idea with the virtual ... is how it works, but it must make sense as in general just a virtual server doesn't communicate with another one. a pool member might, or another irule might do it.

The iRules only forward if the URI starts with the specified, e.g. Request to /vs37/some/uri/path which hits Virtual Server vs37 will be forwarded to vs38.

Let us know how you want to decide if traffic needs to be forwarded from my vs37 to vs38, part of the a HTTP Request or the client IP address etc?

Same for forwarding between vs38 and vs36?

Do you have any pool on vip 37?

Thx Srini