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Forum Discussion

nickzml_306327's avatar
nickzml_306327
Icon for Nimbostratus rankNimbostratus
Jan 17, 2017

Hash Persistence based on HTTP Header "SV" tag

Hello, I am looking for the way how to implement the hash persistence based on http header "SV" tag with iRule. We have one virtual server with few servers mapped to one pool.   Currently we are ...
application delivery
BIG-IP
devops
iRules
Patrik_Jonsson's avatar
Patrik_Jonsson
Icon for MVP rankMVP
Jan 17, 2017

Worked like a charm. Here's how it looked like on my unit:

curl -k -H "sv: test" -H "Host: www.mysite.com" https://VIP-IP/en/

Sys::Persistent Connections
universal  test  VIP-IP:443  SERVERIP:4000  (tmm: 0)
Total records returned: 1

The default timeout is 180 seconds. Are you sure you tested before that?

If the sv header is set in the response as well as the request, please add an irule event from for 

when HTTP_RESPONSE
like this:

when HTTP_REQUEST {
  if { [HTTP::header exists "sv"] } {
    persist uie [HTTP::header value "sv"]
  }
}

when HTTP_RESPONSE {
  if { [HTTP::header exists "sv"] } {
    persist add uie [HTTP::header value "sv"]
  }
}

/Patrik